is a measuring instrument for measuring light and color. Luminance meter is one of the necessary instruments in every chemical analysis laboratory. It has been widely used in various quantitative and qualitative analysis.
Definition of luminance meter
Luminance meter is a measuring instrument for measuring light and color. Luminance meter is one of the necessary instruments in every chemical analysis laboratory. It has been widely used in various quantitative and qualitative analysis.
Principle of luminance meter
Luminance meter mainly uses a pair of apertures with a certain distance to receive light flux with fixed stereo angle and fixed projection area. This value does not change with the object's distance, as long as the surface area of the object is large enough. In order to aim at the measured object, imaging system is often used. The measured light source is imaged on a mirror with aperture (front aperture) after the objective lens. Some of them are received by the human eye through the mirror and eyepiece to aim and monitor the coincidence of the clear imaging surface and the mirror with aperture. The other part of the light passes through the aperture on the mirror and through the rear aperture to reach the V (lambda) receiver. The brightness value is displayed with a pointer or a digital header.
Characteristics of luminance meter
1. Microcomputer control and data processing.
2. Using interferometric filters as spectroscopic elements, photovoltaic cells are used for photoelectric conversion.
3. It has direct reading of potassium and sodium concentration, curve fitting, sensitivity drift, automatic correction and automatic filling degree. Operational error display, printing results and other functions.
4. Linear stability and good reproducibility, especially suitable for clinical application.
Application of Luminance Meter
Luminance meter is a commonly used test instrument in the fields of lighting engineering, light source and light emitting devices, film and television, traffic signal, architecture, atmospheric photometry, etc.