Articles

More pixels! This is a major trend in the display industry. The benefits of 8K or higher resolution TVs may be debatable. For eye catching applications such as AR/VR glasses, more and therefore smaller pixels are required for technical feasibility.

The new fully automated 7-axis DMS 904 goniometer is ideally suited to the optical characterization of large and curved displays.

In this article, we present a step-by-step analysis of how to assess the laser safety of typical pulsed VCSELs and VCSEL arrays as often used in consumer electronics and automotive lidar applications. We offer two examples that represent typical challenges when dealing with VCSEL sources.

Technical innovations are driven by the call for ever higher display resolutions. In particular, μ-LEDs are regarded as the technology of the future. In quality control and the calibration of high-resolution OLED- or μ-LED displays in production lines, light measurement technology faces new challenges.

Founded in 1986 as a result of Richard Distl winning a German youth research competition, Instrument Systems is now a leading manufacturer of high-precision spectrometers, customized systems, and software solutions for spectral light measurement. Top display and LED manufacturers rely on the company’s innovative photometry systems, technical expertise, and market know-how to solve measurement challenges during R&D and production.

With the publication of Technical Report CIE 250:2022 Spectroradiometric Measurements of Optical Radiation Sources, the CIE has issued a contemporary document on the fundamentals of spectroradiometry, thereby discharging its predecessor CIE 063:1984 into well-earned retirement after 38 years of effective service.

In this paper we explain the differences of VCSELs as compared to “normal” collimated, Gaussian lasers, and outline the main steps necessary for VCSEL safety assessment.

Variable testing of the overall ADB lighting system with the highest precision in a standard-compliant, realistic situation in the field.

Novel one-shot method enables the full performance efficiency of the VCSELs to be exploited while assuring safe operation.

Novel display technologies, such as near-eye and microLED displays, enable exciting new user experiences. However, they also impose big challenges for quality control, especially with substantial production tolerances and spectral variances of light sources.

The promising germicidal effect of UV-C radiation, also on the coronavirus, raises the question of the reliable measurement of UV radiation. However, this complex task needs expertise and the appropriate equipment.

AMS screen imaging system allows ultra-fast determination of light distributions for HD / ADB / matrix / pixel vehicle headlamps.

Vertical cavity surface-emitting lasers (VCSEL) are getting more and more popular for 3D sensing and time-of-flight technology in consumer and automotive applications. VCSEL arrays with hundreds of single emitters are often used. Measurement of the radiant intensity distribution is the key to performing a proper eye safety assessment and designing suitable secondary optics for

these emitters.

Das UV-Spektrum ist während der Corona-Pandemie in den Fokus gerückt. Bisher existierte kein Referenzstandard für die Strahlungsleistung. Jetzt gibt es einen Kalibrierstandard für UV-LEDs.

The rapidly emerging dominance of OLED technology for illumination and display applications is driving demand for a metrology tailored to these light sources.

The authors summarize a UV-LED calibration concept that relies upon radiant flux, and emphasize the advantages for developing measurement standards in the increasingly important UV spectral range. The extremely low measurement uncertainties (k=2) of the UV-ACS are comparably low to those in the metrologically unproblematic visible range, thereby offering a reliable resource for radiant flux calibration in the UV-A, UV-B, and UV-C ranges.

To enhance the feeling of well-being of drivers and passengers in a vehicle, interior displays and control elements should be color-coordinated so that all critical information is quickly and easily recognizable. The quality of optical parameters such as color, brightness, mura, and pixel-detection must therefore be tested at manufacturing stage, enabling decentralized component production. This is only realizable with high-precision light measurement technology in the entire supply chain.

In the mass production of laser diodes such as VCSEL, high-resolution array spectroradiometers are an efficient alternative for in-process inspection in a 24/7 production environment. Compared to established measurement techniques, they also guarantee high throughput volumes and reliability in the industrial environment: their configuration means high mechanical stability and enables integration times in the order of just a few milliseconds for CCD and microseconds for CMOS detectors.

The transition from incandescent light bulbs to (O)LEDs as dominant lighting sources poses new challenges to light measurement. (O)LEDs exhibit completely different and far greater variations in their spectral distribution, for the measurement of which calibrations with standard illuminant A are not optimal. Metrological traceability is thus particularly important for the interpretation of (O)LED measurements.

Although microLED displays are a promising technology, they pose new challenges for metrology. Here, two authors from Instrument Systems show how an imaging light measurement device made of a 150-megapixel RGB sensor and a high-end spectroradiometer can provide faster and more accurate microLED measurements.

In order to maximize the feeling of well-being of the driver and passengers of a vehicle, interior displays and control elements should be color-coordinated, so that all important information is quickly and easily recognizable. The quality of optical parameters must be tested at the manufacturing stage, enabling decentralized component production.

Before an LC display is accepted by an OEM, the quality must be carefully tested according to fixed criteria. Besides know-what and know-how, high-precision optical measuring technology is called for here.

The user must familiarize him- or herself with new values and terms, and expects consistency. That in turn is a challenge for lamp and luminaire manufacturers: How are these quantities correctly measured on a comparable basis?

The current international Standard IEC 62471 contains guidelines for evaluating the photobiological safety of lamps and lamp systems. To ensure reliable evaluation, it places extremely high demands on measuring equipment and procedures.

The display market of the automotive industry is developing at rapid rate. Along with fast technological advancement of infotainment systems, head-up displays, or central controllers, a growing demand for safety, aesthetics and user comfort is evolving. In order to economically benefit from the new challenges in the automotive interior sector, it is crucial for suppliers to have a high success rate in meeting OEM display requirements.

High-resolution array spectroradiometers guarantee high throughput volumes and reliability in industrial environment.

Have you ever wanted to buy an LED lamp, but were confused by the data on the packaging? With a few technical explanations you will know what you need to be aware of.

Instrument Systems addresses increasing demands on light measurement technology in the automotive sector: the goniophotometer AMS 5000 combined with the DSP 200 photometer offers a perfect solution for testing modulated LEDs, which today ensure a driving experience under optimum lighting conditions.