A VIS spectrophotometer is a quantitative tool for analyzing the visible spectral properties of a sample with outstanding degrees of accuracy. It can acquire the intensity of a light source at wavelengths of between 380 – 780 nm, with integrated processors capable of running independent calculations and providing rapid assessments of a lighting product’s spectral output. Multiple configurations of VIS spectrophotometers exist to enable precise measurements of visible spectra from numerous lighting products requiring specific metrics.
This article will explore the applications of a VIS spectrophotometer in more detail.
Display Measurements with VIS Spectrophotometers
The hardware of a VIS spectrophotometer can accurately assess the correlated colour coordinates according to CIE definitions of a display. The main application for measuring displays with spectrophotometers is to calibrate relatively faster colorimeters used in production lines on target displays, to ensure an overall uniformity between screens of different batches.
The Cronus series VIS spectrophotometer from Admesy is capable of calibrating its own built-in tri-stimulus colorimeter and perform high-speed colorimetric measurements based on spectral accuracy. It can be used for R&D of emerging display technologies, or quality control of end-products in sites where multiple different display technologies are monitored.
LED Measurements with VIS Spectrophotometers
Light-emitting diodes (LEDs) are one of the most broadly used components in the world, with applications in industrial, commercial, and domestic sectors. While LEDs are easy and affordable to produce, differences between batches are inevitable due to the production processes. Binning LEDs is useful to ensure uniformity and consistency in lighting products.
Light Bulb Measurements with VIS Spectrophotometers
The colour rendering index (CRI) refers to a light source’s capacity to accurately reproduce the colours of objects respective to natural (day)light. A high CRI value is attractive for applications where accurate colour reproduction is required. This may not only be important for general interior lighting but in particular for (fashion) retail.
VIS Spectrophotometers from Admesy
At Admesy, we provide various VIS spectrophotometers for mid and high-end applications. Mid-range Hera series spectrometers are available in three wavelength ranges and different optical configurations: lens systems typically applied in display measurements, cosine correctors for lighting applications and fiber versions allow remote sensing and connecting to accessories such as integrating spheres.
In addition, Admesy provides the world’s first VIS spectrophotometer combined with an innovative tri-stimulus colorimeter. This allows users to alternate between robust spectral information and high-speed colour and flicker measurements, providing a broad range of measurement capacities with a sample rate of up to 186.567 samples per second. The Cronus series is available in three distinct specifications, equipped with either fiber connections, a lens, or cosine correctors for specific applications.
For high-end high dynamic range spectral measurements that also require accurate spectral measurements at low luminance levels, the Rhea spectrophotometer is the ideal measurement solution. With various options in slit size, grating and desired wavelength range, the Rhea is the world’s most affordable one-off configurable spectrophotometer.