Admesy Articles

Characterizing Photometric Flicker

Interesting read: in November 2018 the US Department of Energy published this report on Characterizing Photometric Flicker with Handheld meters. This publication follows the earlier publication of February 2016 where they evaluated multiple desktop light meters. Admesy was proud that our Asteria lightmeter was positively evaluated in the 2016 report, and even more proud that […]

Measuring OLED displays in production environments

Displays are being integrated in more devices than ever. Nowadays displays are used in cars, phones, tablets, laptops, watches, household appliances, etc.LCD has been the dominant display technology for many years, during which the technology matured and reached its limits with respect to resolution, brightness, contrast, colour saturation and speed. There have been multiple display […]

Outlining the Steropes LED Series Light Source

It is impossible to perform accurate transmissive or reflective light measurements without a suitable light source. This was the surprisingly simple principle that underlined the development of Admesy’s halogen and LED light sources. Displays, light emitting diodes (LEDs), and solid-state lighting (SSL) act as their own light sources and spectrophotometric equipment can directly acquire the […]

Color Measurement: Explaining Color Space and Gamut

The CIE chromaticity diagram maps the average spectral sensitivity of the human eye. This specifies any visible color as a function of three parameters, or tristimulus values, which are analogous to the average sensitivity of human vision to different hues. This method of color measurement was popularised by the CIE 1931 standard. The color space […]

Reproducibility Challenges for LED Measurement Instruments

The emergence of solid-state lighting (SSL) has rapidly eclipsed the performance and efficiency capacities of incandescent light bulbs. This technology includes LEDs and emerging organic light emitting diodes (OLEDs), which represent exciting potential for future lighting applications. Despite the tantalizing possibilities of OLED technologies, LEDs are still expected to occupy as much as 70% of […]

What are Reflection Measurements?

The perception of colour is primarily determined by two objective factors: the wavelengths of light that are reflected from a surface; and the colour of the illuminating light. White light is a combination of lights of different wavelengths in the visible spectrum. A surface will absorb and reflect proportions of these wavelengths dependent upon its […]

Color measurement and white point adjustment for automotive R&D

The quality of lighting and displays in the automotive industry are critical design factors. Accurately measuring the colors emitted from the lights and displays enables precise, high-quality results. This article outlines the major solutions for accurate color measurement in vehicle design and manufacturing. The automotive market is becoming increasingly competitive. Consumers are demanding better, safer, […]

What are Transmission Measurements?

Whenever incident light hits a surface it is either reflected, absorbed, or transmitted. Reflection refers to light which is rejected at the interface and redirected back into the media through which it was already propagating. Absorption refers to the amount of energy lost to the electrons in sample matter as a light wave propagates through […]

Colorimetry in perspective of the human eye

Colorimetry is the science used to quantify colour in perspective of the human eye The science of measuring colour and the appearance of colour is vital: Perception of colour is a subjective process where the brain responds to stimuli produced when incoming light reacts with the several different types of cone cells of the human […]

The Changing Landscape of Display Tests

The display sector is characterized by rapid periods of growth and innovation when competing technologies occupy large portions of the same market space. Cathode ray tube displays were supplanted by the rise of lightweight liquid crystal display (LCD) matrices, later on with light-emitting diode (LED) backlights, and now LCDs are experiencing significant market competition from […]