Measuring Light: What’s the Difference Between Radiometers, Photometers, Spectrometers & Spectroradiometers?
Radiometers, photometers, spectrometers and spectroradiometers are all used to measure light, but they operate in fundamentally different ways and have distinct advantages and disadvantages.
Image Quality Testing and Image Sensor Calibration
By Russell Bailey, June 2024 Abstract To properly characterise and calibrate imaging devices there are a wide range of tests that need to be performed to account for distortions caused by the sensor, the camera optics and filters. Standards There are a number of standards bodies and multiple standards from those bodies that define what […]
The Heat Island Effect and Solar Reflectance Index (SRI) Measurement
The solar reflectance and heat retention properties of materials are key factors that lead to increased temperatures in urban compared with rural environments. The metric developed to assess the performance of building materials is called the Solar Reflectance Index (SRI).
Lighting in Horticulture
How do you know what lighting is needed and how do you validate that lighting either as a plant grower or as a lighting product manufacturer?
What is Flicker?
In the realm of lighting, flicker isn’t just a mere oscillation of light; it’s the unsung hero dictating our visual comfort. Learn what flicker is and how to measure it.
Display Metrology and the Effects of Ambient Illumination
Pro-Lite’s Robert Yeo reviews the metrology of displays and explains the problem of ambient light and sunlight readability.
Light Metrology: The Tools of the Trade
Pro-Lite serves customers working in lighting and illumination with a complete solution to measuring the brightness, colour, colour rendering and spatial distribution of lighting products in the architectural, automotive, avionics…
How Many Megapixels are Too Many?
Pro-Lite provides a solution for almost any application in measuring the colour and brightness of light sources and displays. From a simple, inexpensive lux meter, to the world’s most advanced imaging photometers.
The Dark Art of Light Metrology
The science of measuring the amount, spectral and spatial distribution of light emitted by a source (light bulb, screen, infrared lamp etc.) is generally poorly understood. Few university-level physics or engineering syllabuses review…
Automotive Lighting: Lighting the Road Ahead
The history, design, technology & metrology of vehicle headlamps By Robert Yeo, May 2020 This article was first published in the April 2020 issue of the ‘Lighting Journal’, published by the Institute of Lighting Professionals (The ILP). Introduction: Dim and Dimmer Vehicle headlamps were once rated in units of candle power, which is an apt […]