A cosine corrector is an optical diffuser, used to captures the light upon a surface over a 180 degree angle. The surface of cosine correctors responds in accordance with Lambert’s cosine law: the amount of light falling upon the cosine corrector is proportional to the cosine of the light beam’s incident angle.
At a 60 degree angle, only half the intensity is measured as opposed to 100% at a 0 degree angle. A typical application of a cosine corrector is the illuminance measurement of a lighting situation.
How are you measuring?
With fibers and other accessories even more type of measurements are possible. Often used accessories are integrating spheres, cuvettes for fluids, light sources or filter holders.
A cosine corrector collects the light from the half space under 180 degrees. A typical application is the illuminance measurement of a lighting situation.
Consumers are used to enjoy top-quality displays in their mobile phones, tablets, laptops and even cars. Emerging technologies such as lighting surfaces for office and home illumination are expected to look equally perfect. Both displays and luminous surfaces are the main application areas for imaging colorimeters.
Measuring the luminance or color values at a specific location of the device under test is a typical use case when measuring displays. It can, however, also be meaningful to assess reflected light.
2.1 mm focusing lens
2.1 mm focus. lens w/ pointer
5 mm focusing lens
10 mm collimating lens
10 mm wide-angle coll. lens
20 mm collimating lens
27 mm wide-angle coll. lens
VIS 360 - 950 nm