A luminance meter is a metering instrument for light and color measurement. It is one of the common instruments and equipment necessary for every chemical analysis laboratory and has been widely used in various quantitative and qualitative analyses.

A luminance meter is an analytical instrument used in the fields of mathematics, transportation engineering, electronics and communication technology, engineering and technical science basic disciplines, brightness distribution, brightness uniformity, and other brightness measurements, used in on-site roads, tunnels, classrooms, gymnasiums, etc. Brightness, UGR, GR, TI, and other glare tests.
Principle of luminance meter. This product mainly uses a pair of light holes with a certain distance to receive the luminous flux of fixed solid angle and fixed light projection area. This value does not change with the distance of the object, as long as the surface area of ​​the object is large enough.
In order to make the Luminance meter aim at the object to be measured, an imaging system is often used. The light source to be tested is imaged on the mirror with a hole (front light hole) after passing through the objective lens, part of which is received by the human eye through the mirror and eyepiece to aim and monitor the clear imaging surface and the mirror with a hole; the other part of the light is After passing through the small hole on the mirror, it reaches the V(λ) receiver through the rear light hole. The brightness value is displayed with a pointer or a digital meter.
Through the above introduction and analysis of the Application of the luminance meter, hope it helps you.