Automotive Archives - PISÉO https://piseo.fr/en/markets-posts/automotive-posts/ Design and Characterization of Innovative Optical Systems Thu, 26 Mar 2026 09:47:53 +0000 en-US hourly 1 https://wordpress.org/?v=7.0 https://piseo.fr/wp-content/uploads/2020/02/cropped-minioeilpiseo2-1-90x90.png Automotive Archives - PISÉO https://piseo.fr/en/markets-posts/automotive-posts/ 32 32 Optical design of a head-up display (HUD) https://piseo.fr/en/optical-consulting-engineering-posts/optical-design-of-a-head-up-display-hud/ Thu, 26 Mar 2026 09:41:22 +0000 https://piseo.fr/?p=30434 PISÉO was approached by a client in the automotive sector to optimize a head-up display (HUD) system. Although operational, this system did not meet the car manufacturer’s requirements. The device in question used an optical concept based on the projection of an image via two curved mirrors and an output window, which was then reflected […]

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]]> PISÉO was approached by a client in the automotive sector to optimize a head-up display (HUD) system. Although operational, this system did not meet the car manufacturer’s requirements.

The device in question used an optical concept based on the projection of an image via two curved mirrors and an output window, which was then reflected onto the windshield. This system had to meet strict criteria imposed by the customer, such as overall size and visibility characteristics, while maintaining high image quality. In order to meet the car manufacturer’s objectives, the customer called on PISÉO to optimize its head-up display. After a critical analysis of the existing system (performance and construction), PISÉO’s engineers developed an optical design that solved the problems identified.

Optics in a head-up display (HUD

A HUD (Head-Up Display) is an augmented reality device that projects information directly into the driver’s field of vision, in this case onto the windshield. This type of technology, commonly used in the automotive industry, also has applications in defense, healthcare, manufacturing, and video games via augmented reality headsets.

The UHD system that PISÉO has been working on consists of an OLED screen, a set of mirrors, and the windshield as a projection screen. Each component must be optimized to provide excellent image quality that is legible and free of stray light, while meeting constraints in terms of space, environment, industrialization, and cost.

Optical design of the HUD system

To meet the customer’s specific needs, PISÉO engineers used Zemax OpticStudio optical design and simulation software. The main focus was on the mirrors, a key factor in meeting space constraints while maintaining high image quality.

PISÉO engineers modeled the optical system in Zemax, optimized the design using their extensive experience in the field, and simulated the achievable performance. This work also made it possible to anticipate and correct recurring problems in augmented reality systems, such as ghost images, luminance management for day and night visibility, and distortion minimization. This optical design was carried out taking into account the industrial feasibility of the optics and the target cost.

HUD

Laboratory testing of the HUD system

PISÉO has a laboratory specializing in imaging and regularly conducts image quality tests on AR/VR/MR headsets and HUD systems. The prototype provided by the customer was subjected to various tests, including:

  • Spatial resolution
  • Contrast
  • Distortion
  • FOV
  • DOV
  • Luminance and uniformity

These tests validated the optical design of the HUD system and enabled industrial optimization of the product.

Head-up display (HUD) systems are complex optical devices that must meet numerous technical constraints, particularly when used in vehicles.

Thanks to its expertise and technical resources, PISÉO supported this customer from the feasibility study to industrialization, demonstrating its ability to design low-cost, optimized, and industrializable embedded optical systems. These solutions meet the strict requirements of automotive manufacturers.

Please do not hesitate to contact us for any optical system design and optimization project. We will meet your needs and expectations from concept to manufacture.

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]]> Logo projector https://piseo.fr/en/optical-consulting-engineering-posts/logo-projector/ Wed, 25 Sep 2024 06:24:24 +0000 https://piseo.fr/?p=29868 To respond to a call for tenders for the design and manufacture of a logo projector for a car manufacturer, an equipment manufacturer called on PISÉO’s optical design experts. Indeed, only expert skills combined with top-notch simulation and testing resources could meet the requirements of optical quality, compactness, and price within a short time frame. […]

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]]> To respond to a call for tenders for the design and manufacture of a logo projector for a car manufacturer, an equipment manufacturer called on PISÉO’s optical design experts. Indeed, only expert skills combined with top-notch simulation and testing resources could meet the requirements of optical quality, compactness, and price within a short time frame.

A logo projector with high optical performance

In order to differentiate itself from the competition, the car manufacturer set ambitious image quality objectives for the logo projector:
Very fine detail rendering : the fineness of the projected details reinforces the precision of the image and its readability. This requires the use of optical projection systems with lenses with no aberrations.
Absence of chromatism : Chromatism is an optical aberration that causes colors to change. In imaging, it can be induced by optical systems that are not sufficiently optimized to reduce its effect.
Brightness – level of illumination on the ground and uniformity : this characteristic is essential to perceive the projected image correctly in any environment. In the case of a logo projector, it requires the use of a sufficiently powerful light source and an illumination system coupled with an optical imaging system.

A logo projector with two custom-designed optical systems

To meet the high technical requirements, a custom solution was designed and prototyped by PISÉO engineers: they developed  an ultra-compact logo projector that combines an optical imaging system and an optical illumination system.
The Optical Imaging System integrates a limited number of dedicated lenses with aspherical surfaces. This combination of lenses makes it possible to correct optical aberrations while preserving the economic competitiveness of the system. Particular attention was paid to the materials used in order to prevent chromatic aberrations and preserve high injection quality during the manufacture of the lenses.
The Optical Illumination System integrates a high-luminance white LED that provides sufficient optical efficiency, and a flux collection lens that optimizes the illumination of the mask while respecting the constraints imposed by the optical imaging system.
The design of the logo projector followed a rigorous sequential process to arrive at a robust and competitive industrial solution. The skills in the development of optical illumination and imaging systems of PISÉO engineers were put to use during this development. They also mobilized their design and optical simulation support tools to quickly evaluate the concepts they imagined. In particular, they used LightTools for the optical illumination system and Zemax for the optical imaging system. The false color and realistic renderings made it possible to accurately determine the achievable visual performance.
Tests in PISÉO’s optical laboratory made it possible to characterize the candidate LEDs precisely and make an informed choice of components, as well as to validate the performance of a prototype.

Thanks to the expertise of its optical design engineers and its advanced simulation and characterization resources, PISÉO successfully met the technical challenge. The team quickly provided results that met the manufacturer’s expectations, helping the customer win its contract.

If you want to design and produce a high-quality image projection solution while taking into account your industrial and economic constraints, do not hesitate to contact us to tell us about your project.

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]]> Improving the uniformity of a vehicle’s LED taillight https://piseo.fr/en/optical-consulting-engineering-posts/improving-the-uniformity-of-a-vehicles-led-taillight/ Wed, 25 Sep 2024 05:52:36 +0000 https://piseo.fr/?p=29843 At the request of a Tier 1 automotive supplier, PISÉO intervened to improve the uniformity of a vehicle LED taillight while achieving the required luminance levels. Although LEDs offer many advantages (energy efficiency, longevity, flexible design), they present challenges in achieving quality lighting systems, including uniform luminous surfaces. Thanks to their mastery of lighting system […]

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]]> At the request of a Tier 1 automotive supplier, PISÉO intervened to improve the uniformity of a vehicle LED taillight while achieving the required luminance levels. Although LEDs offer many advantages (energy efficiency, longevity, flexible design), they present challenges in achieving quality lighting systems, including uniform luminous surfaces. Thanks to their mastery of lighting system design, particularly those using LED light guides, PISÉO engineers were able to meet the challenge.

Understanding the origin of optical defects

Optical defects observed in LED taillights, such as uneven lighting, excessive bright spots, or shadow areas, are often due to inefficient light distribution. These anomalies can be caused by an inadequate arrangement of LEDs, poorly designed diffusers, or light guides that do not direct the light correctly.
To identify the precise causes, PISÉO engineers followed a rigorous methodology. The first step consisted of a luminance mapping in the laboratory, which provided a visualization of the distribution of light over the entire surface of the lamp, highlighting the problem areas. A critical analysis of the lamp construction was then conducted, focusing on the physical design of the optical components, including the arrangement of the LEDs and the materials used.
 
A key point of the analysis concerns the geometry of the light guides. The engineers thus examined in detail the structure of the guides to identify design defects that could lead to light leaks. These leaks often result from poor light guidance, where light escapes or disperses in an uncontrolled manner, causing an irregular distribution. Finally, the optical system was modeled in LightTools, where a simulation allowed the engineers to locate the sources of the defects and propose optimal solutions.

Optimized optical geometry to eliminate visual defects

After identifying the causes of the defects, PISÉO engineers devised solutions and integrated geometric modifications to the optical surfaces of the light. The latter was designed to guarantee high coupling efficiency of the LEDs with the optical guides, thus allowing optimal use of their luminous flux. The shapes of the optical guides were optimized to guarantee total internal reflection (TIR) of the light rays.

Thanks to the recognized expertise of its engineers in optical design and the use of advanced laboratory simulation and characterization methods, PISÉO successfully met this technical challenge. The team was able not only to meet the customer’s rigorous requirements but also to produce results that exceeded expectations. The optical systems designed and validated by PISÉO offer superior performance in terms of luminance, contrast, and chromatic precision, thus contributing significantly to the perceived quality of the car manufacturer’s vehicles.

If, like this satisfied customer, you wish to design and produce a high-quality image projection solution, whilst taking into account your industrial constraints, do not hesitate to contact us to tell us about your project.

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]]> ADAS cameras for automotive and aeronautics https://piseo.fr/en/optical-laboratory/optical-imaging-laboratory/adas-cameras-for-automotive-and-aeronautics/ Mon, 07 Aug 2023 21:14:00 +0000 https://piseo.fr/?p=28071 In the automotive sector, the majority of road accidents are due to human error by the driver. Thus, it appears essential, in order to reduce the number of accidents, to provide the driver with assistance in order to inform him about his environment, warn him of a situation of imminent risk of accident, and possibly […]

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]]> In the automotive sector, the majority of road accidents are due to human error by the driver. Thus, it appears essential, in order to reduce the number of accidents, to provide the driver with assistance in order to inform him about his environment, warn him of a situation of imminent risk of accident, and possibly act on driving the vehicle in his place. The development of ADAS (advanced driver assistance systems) sensors aims to achieve this, and ultimately lead to the driving of the autonomous vehicle.

All ADAS systems mix sensors of different technologies, ranging from ultrasonic proximity detectors for parking assistance to blind-spot RADAR detectors and even LiDAR for the detection of obstacles in front of the vehicle. Moreover, camera-based ADAS sensors, such as the front camera system, provide a 360° view around the vehicle – and when installed inside the cabin, such as DMS and OMS, provide information on the driver’s state of alertness, the number of occupants, and whether their seat belts are properly fastened. To complement the camera-based ADAS systems, electronic rearview mirrors, or e-mirrors, offer the driver a better view of the outside environment from the cabin. These systems (also called CMS or SRVM according to car manufacturers) consist of a monitor in addition to a camera to present a field of observation to the driver in the best conditions.

Additionally, some ADAS sensors with cameras are being considered for installation in aircraft.

In all cases, these systems contribute to increasing the level of active and passive safety of a vehicle, and must ensure reliable and repeatable detection or measurement of their environment, in all conditions of use. They also must meet regulatory requirements and applicable standards.

To guarantee a high level of performance in increasingly broad uses, the needs for characterizing the performance of these systems are increasing.

PISÉO, an innovation and expertise center in optics and photonics, offers characterization services in our laboratory for ADAS systems that embed cameras.

Front camera system
  • The “front camera” system is a device which is positioned behind the windshield, at the level of the interior mirror. It observes the space in front of the vehicle to read road signs such as speed limit, no overtaking, or end of construction. This system also makes it possible to provide information at night to the adaptive high-beam management system, by detecting entry into a built-up area and the presence of other vehicles coming in the opposite direction (or traveling in the same direction) in order to lower the headlight beams so as not to distract other drivers. Moreover, the front camera system can also detect lane markings to warn the driver of an unintentional crossing of a solid or dotted line. Finally, the system allows the detection of an obstacle which may appear in front of the vehicle, such as a pedestrian emerging from a line of vehicles parked alongside the road.

The tests and characteristics measured for these systems are described below. Some of the tests are performed in the visible and near IR ranges:

  • • System field of view (FOV): controls the observation and detection space of the system.
  • • Spatial resolution of the system: allows for measuring the spatial resolution of the system – that is to say, to determine the dimensions of the smallest object detectable by the system. This measurement is done through the measurement of the MTF.
  • • The signal-to-noise ratio of the system: measures the detection power of the system according to the signal level it receives. This measurement is done by measuring the SNR.
  • • Distortion: allows for measuring the distortion of the image delivered by the camera in order to take it into account in the detection algorithms. This is measured using a checkerboard pattern.
  • • Color rendering – colorimetry: the colorimetry is measured on a Rezchcker chart. The color differences of the colored areas of the target are measured, and the values  DeltaE00 and  DeltaC00 are calculated.

Front-Camera

Standards & regulations

To carry out the characterizations, PISEO experts rely on recognized test methods (international standards). We are also able to develop protocols and scripts in Python for carrying out specific tests. The list below presents a non-exhaustive list of standards controlled by our laboratory.

• ISO 12233: Electronic camera imaging — resolution and spatial frequency responses

• ISO 15739: Electronic camera imaging — noise measurements

• ISO 14524: Electronic cameras — methods of measurement of opto-electronic conversion functions

• ISO 7589: Photography — sensitometric illuminants — specifications for daylight, artificial light, and printer

Measurement and analysis equipment for cameras

PISEO’s test laboratory is equipped with all the equipment necessary to carry out the measurements mentioned above. The list below gives an overview:

• IMATEST v22.1 image-quality analysis software.

• Standard targets produced according to the ISO 12233 standard, or according to a specific protocol defined with our customer.

• IMATEST light sources with luminance uniformity greater than 90%, in the visible range (color temperature 3100K) and in the near IR (940 nm) for the backlighting of the test patterns.

• Collimators with 70° and 150° field-of-view angle, allowing measurements to be taken on staffs located at distances between 400 mm and infinity.

Camera monitor system & smart rear virtual mirror ( CMS & SRVM)

The CMS system (camera monitor system), also known as SRVM (smart rear virtual mirror), or even electronic mirror (e-mirror), generally consists of two cameras, display screens inside the cockpit, and an electronic control unit. It replaces traditional exterior mirrors to provide the driver with a better in-cabin view of the outside environment. The field of vision is wider, which improves visibility in poor weather or lighting conditions, and also helps to give safety alerts. Thanks to its lightness and streamlined shape, it also helps to reduce CO2 emissions and save energy.

The tests and characteristics measured on these systems are as follows:

• Magnifications: a measure of system magnification and aspect ratio.

• Sharpness and depth of field: determined by MTF measurement.

• Resolving power: the resolving power is measured by measuring MTF at several points in the field of view.

• Distortion: the geometric distortion measurement is performed on a checkerboard pattern.

• Contrasts: contrasts are measured in different camera illumination conditions (e.g., under glare) and different screen illumination conditions.

• Uniformity: directional uniformity and lateral uniformity are measured under daytime conditions with diffuse daylight.

• Artifacts: the analysis of the number of spots that appear on the screen when the camera is dazzled by an intense light source.

• Color rendering – colorimetry: the colorimetry is measured on a Rezchcker chart. The color differences of the colored areas of the target are measured, and the values ?E00 and ?C00 are calculated.

• Shades of gray: eight levels of gray are measured, and an analysis of their perception is carried out.

• Flicker: flicker measurement according to ISO 13406-2:2001.

• Latency time: measurement of the time between the appearance of a light signal in front of the camera, and its appearance on the system screen.

• Image formation time: the measurement of the image formation time is carried out according to the ISO 9241-305:2008 standard.

The left-hand mirror camera of the car, the camera helps to find

Standards and regulations

To carry out the characterizations, PISEO’s experts rely on recognized test methods (international standards). We are also able to develop protocols and scripts in Python for carrying out specific tests. The list below presents a non-exhaustive list of standards controlled by our laboratory:

Regulation No 46 of the Economic Commission for Europe of the United Nations (UNECE) — Uniform provisions relating to the approval of indirect vision systems and of motor vehicles with regard to the installation of such systems

ISO 16505: road vehicles — ergonomics and performance aspects of on-board cameras — requirements and test procedures

• ISO 15008: road vehicles — ergonomic aspects of transport information and control systems — specifications and compliance procedures for in-vehicle visual presentation

• ISO 15008: road vehicles — ergonomic aspects of transport information and control systems — specifications and procedures for visual presentation in the vehicle

• ISO 9241-305: ergonomics of human-system interaction — optical laboratory test methods for electronic display screens

• ISO 13406-2: ergonomic requirements for working on flat-panel display screens — ergonomic requirements for flat-panel displays

• ISO 12233: electronic camera imaging — resolution and spatial frequency responses

• ISO 14524: electronic cameras — methods of measurement of opto-electronic conversion functions

Measurement and analysis equipment for CMS systems

The PISEO test laboratory is equipped with all the equipment necessary to carry out the measurements mentioned above. The list below gives an overview:

• IMATEST v22.1 image-quality analysis software.

• Standard targets produced according to ISO 16505 or ISO 12233 standards, or according to a specific protocol defined with our customer.

• Multispectral lighting systems uniform in luminance and standard illuminants D55, D65. Direct lighting or backlighting.

• Westboro Photonics P1230U 12 Mpx video luminance meter, lenses, and Photometrika analysis software.

• Collimators with 70° and 150° field-of-view angle, allowing measurements to be taken on staffs located at distances between 400 mm and infinity.

• Agilent DSOX2004A-ATO-8966 70 MHz oscilloscope for latency measurement.

Driver monitoring system (DMS) and occupant monitoring system (OMS)

The DMS (driver monitoring system) is an assisted driver monitoring device. Its role is to alert the driver to pay attention to controlling the vehicle. The DMS is equipped with several functions, such as head movement analysis, gaze tracking, face recognition, eye blink frequency detection, and body position, all of which monitor the level of driver fatigue and distraction.

The OMS (occupant monitoring system) is a device similar to the DMS, but whose field of view is extended to the entire cabin of the vehicle and not limited to the driver alone.

The tests and characteristics measured on these systems are as follows. For the tests of the DMS systems, the measurements are carried out in the near IR range at 940 nm; on OMS systems, measurements are made in the visible and near IR ranges.

• System field of view (FOV): controls the observation and detection space of the system.

• Spatial resolution of the system: allows for measuring the spatial resolution of the system – in other words, to determine the dimensions of the smallest object detectable by the system. This measurement is done through the measurement of the MTF.

• The signal-to-noise ratio of the system: measures the detection power of the system according to the signal level it receives. This measurement is done by measuring the SNR.

• Distortion: allows for measuring the distortion of the image delivered by the camera, in order to take it into account in the detection algorithms. It is measured using a checkerboard pattern.

• Color rendering – colorimetry: the colorimetry is measured on a Rezchcker chart. The color differences of the colored areas of the target are measured, and the values ?E00 and ?C00 are calculated.

Standards and regulations

To carry out the characterizations, PISEO’s experts rely on recognized test methods (international standards). We are also able to develop protocols and scripts in Python for carrying out specific tests. The list below presents a non-exhaustive list of standards controlled by our laboratory:

• ISO 12233: electronic camera imaging — resolution and spatial frequency responses

• ISO 15739: electronic camera imaging — noise measurements

• ISO 14524: electronic cameras — methods of measurement of opto-electronic conversion functions

• ISO 7589: photography — sensitometric illuminants — specifications for daylight, artificial light, and printer

Measurement and analysis equipment for DMS and OMS systems

The PISEO test laboratory is equipped with all the equipment necessary to carry out the measurements mentioned above. The list below gives an overview:

• IMATEST v22.1 image-quality analysis software.

• Standard targets produced according to the ISO 12233 standard, or according to a specific protocol defined with our customer.

• IMATEST light sources with luminance uniformity greater than 90%, in the visible range (color temperature 31,00K) and in the near IR (940 nm) for the backlighting of the test patterns.

• Collimators with 70° and 150° field-of-view angle, allowing measurements to be taken on staffs located at distances between 400 mm and infinity.

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]]> Automotive calibration bench https://piseo.fr/en/markets-posts/automotive-calibration-bench/ Mon, 07 Aug 2023 21:05:17 +0000 https://piseo.fr/?p=28069 To meet the demands of an automotive supplier that produces light lines on vehicles, PISÉO has developed and built a tailor-made calibration bench to adjust the luminance and color of the parts produced. Luminance and colorimetry requirements To meet the expectations of its market, the customer has defined requirements in terms of uniformity of luminance […]

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]]> To meet the demands of an automotive supplier that produces light lines on vehicles, PISÉO has developed and built a tailor-made calibration bench to adjust the luminance and color of the parts produced.

Luminance and colorimetry requirements

To meet the expectations of its market, the customer has defined requirements in terms of uniformity of luminance and color over the entire length of the light lines. These uniformities must be constant regardless of the level of luminance and the color chosen. For this, the LEDs used are controlled by means of drivers connected to a communication bus and algorithms. To fully understand the objectives of the bench, the PISÉO experts first analyzed these application requirements and the optoelectronic architecture of the system to be calibrated. To do this, they used their unique expertise in designing optical-photonic systems and photometric tests carried out in their own accredited laboratory (scope available on www.cofrac.fr.)

Specification of the calibration bench

After having understood the objectives and constraints of the client, as well as the characteristics of the systems to be adjusted, the PISÉO experts reflected on the design and carried out calculations and complex optical tests which resulted in the specification of the architecture of the bench, its optical measurement equipment, such as a high precision video colorimeter, and the calibration method. During this phase, numerous exchanges took place with the customer, which resulted in a specification that fully met his expectations.

Development and assembly of the bench

At the end of the specification work, which lasted several weeks, PISÉO was commissioned to develop and build the bench. Mechanical design work was thus carried out for the structure supporting the measuring equipment. The algorithms supporting the calibration method were coded, and all the functions for interfacing with the customer’s system were developed, including the human-machine interface (HMI).

Once all the elements of the bench were developed and supplied, they were integrated into the bench within PISÉO’s laboratory. Final operational tests and fine-tuning completed the setup of the bench.

Validation, delivery, training

Drawing on their mastery of optical metrology, the PISÉO experts rolled out a bench test plan and performed a Reproducibility and Repeatability (R&R) study. The results of this work made it possible to validate the bench and trigger its delivery to the customer.

The project concluded with the training of the customer’s personnel in charge of the use of the bench and their final approval.

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]]> VW ID3 headlamps construction and performance analysis https://piseo.fr/en/optical-consulting-engineering-posts/vw-id3-headlamps-construction-performance-analysis/ Thu, 03 Nov 2022 14:54:50 +0000 https://piseo.fr/?p=22774 Objectives of the report based on PISÉO’s & A2MAC1’s collaboration The integration of LED technologies has given automotive lighting manufacturers the opportunity for strong differentiation via new designs and functionalities. Automotive headlamps are subject to many technical and aesthetic considerations allowing multiple architectures and optical solutions. Therefore, OEMs and Tier1/2s are looking for accurate technical […]

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]]> Objectives of the report based on PISÉO’s & A2MAC1’s collaboration

The integration of LED technologies has given automotive lighting manufacturers the opportunity for strong differentiation via new designs and functionalities. Automotive headlamps are subject to many technical and aesthetic considerations allowing multiple architectures and optical solutions. Therefore, OEMs and Tier1/2s are looking for accurate technical and performance insights of commercialized devices in order to consolidate their own product strategies.

PISÉO and A2MAC1 each provide unique complementary skills: PISÉO in LED-based system design and performance characterization, and A2MAC1 in automotive benchmarking. Given the complexity of a complete technical and performance analysis of a modern LED headlamp and A2MAC1’s long relationship with the automotive industry, the two companies collaborated to develop this report.

A2MAC1 provided access to the vehicle and set up the test, and PISÉO performed the technical and performance analysis of the headlamp.

Both companies are committed to providing the markets with the best possible benchmark data and insight into commercially available cutting-edge LED-based headlamps.

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Key findings

The analyses of both the architecture and the photometric performance confirm a high-quality product.

Sophisticated optical solutions have been designed and implemented to meet strong performance and integration requirements.

The ID3 headlamp embeds an ADB function whereby 1 to 11 LEDs are selected to extend the beam and cover more than the low beam. However, the resolution of the lit areas, being limited to 11 LEDs, appears low compared to other ADB headlamps installed on high-range vehicles, but it is a step up for this function.

The optical devices of the ADB function are nicely designed ancd well assembled, resulting in good beam quality.

Chromatic effects have been noted along the cut-off line of the low beam. This is due to the technical solution, which generates the cut-off line being unable to suppress the chromatic effect entirely.

Electronic solutions are not fully optimized. The LED choice is valuable, but the implementation on the boards shows a considerable variation and a lack of optimization with basic process constraints.

WV ID3 low beam

Analysis process

PISÉO’s analysis process, as applied to the ID3 headlamp, is based on two distinct phases: a teardown and reverse engineering phase (optics, mechanics, assembly, electronics, thermal management analysis), and a performance characterization phase (characterization plan, headlamp control setup, measurements). Two identical products are used, one for each process phase.

Based on the cross analyses of the outcomes of these two phases, PISÉO has provided a comprehensive statement on the design and performance of the headlamp

More reports will come soon which will allow fair product features and performances comparisons.

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]]> Reliability and performance of OLED displays https://piseo.fr/en/optical-consulting-engineering-posts/reliability-and-performance-of-oled-displays/ Mon, 06 Jul 2020 14:17:17 +0000 https://piseo.fr/?p=2851 Human-machine interfaces (HMI) are more and more present in our daily life and their definition increases with the evolution of screen technologies. OLED technology is one of these technologies and integrators must make choices of relevant suppliers to guarantee the visual performance of displays over time according to the intended uses. With their skills in […]

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]]> Human-machine interfaces (HMI) are more and more present in our daily life and their definition increases with the evolution of screen technologies. OLED technology is one of these technologies and integrators must make choices of relevant suppliers to guarantee the visual performance of displays over time according to the intended uses.

With their skills in mechatronic systems and optical measurement, and equipped with suitable equipment, PISEO experts carry out accelerated aging test programs to check the reliability and optical performance of displays over time.

Automobile dashboard OLED displays

Performed services

>Initial optical and colorimetric measurements:

  • point luminance,
  • average luminance
  • uniformities,
  • contrasts,
  • color coordinates,
  • 2D maps of luminance, colors
  • dead pixels

> Aging tests during xxxh through a specific protocol

> Optical and colorimetric measurement after aging tests

> Results analysis and test report

Accelerated aging in climate chamber
View and measures treatment
Sample of tested device

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]]> Woven optical fiber for automotive lighting https://piseo.fr/en/optical-consulting-engineering-posts/woven-optical-fiber-for-automotive-lighting/ Mon, 06 Jul 2020 13:23:21 +0000 https://piseo.fr/?p=2813 EFI Lighting, a subsidiary of automotive supplier EFI Automotive, has asked PISEO to support the industrial development of large luminous surfaces made from woven optical fibers. The high performance requirements (luminance and uniformity control) required the development of specific LED modules and optical couplers for each purpose. Development of a light system using woven optical […]

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]]> EFI Lighting, a subsidiary of automotive supplier EFI Automotive, has asked PISEO to support the industrial development of large luminous surfaces made from woven optical fibers. The high performance requirements (luminance and uniformity control) required the development of specific LED modules and optical couplers for each purpose.

optical fiber automotive

Development of a light system using woven optical fiber for automotive applications (interior interior design lighting)
woven optical fiber
woven optical fiber

Performed services
  • Definition of the performances to reach according to use cases requirements (intensities, luminances, uniformity, colorimetry, efficiency, reliability, cost)
  • Study and specification of LED modules (choice of LEDs, PCB, driver, management thermal, optical coupling) related to different use cases.
  • Design of different injected and Ag vacuum metallized optical couplers with ZEMAX.
  • Characterization of the performance of LEDs and complete lighting systems using the 50cm integrating sphere equipped with an Instrument System CAS 140 CT spectroradiometer and the PISEO Westboro Photonics PF501A luminance camera

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