Device and a method for detecting a transmittivity spectrum of a light guiding plate

摘要

A detect device and a detect method for transmittivity spectrum of the light guiding plate are provided. The detect device comprises a mixing cavity unit for providing a linear light source with continuous spectrum to a light guiding plate to be detected; a light guiding plate placing unit located at a side of the mixing cavity unit, on which the light guiding plate to be detected is disposed to receive light from the mixing cavity unit; and a detecting lens disposed above the light guiding plate placing unit for detect the spectrum.

主权项

1. A device for detecting a transmittivity spectrum of a light guiding plate, comprising:
a mixing cavity unit for providing a linear light source with continuous spectrum to a light guiding plate to be detected; a light guiding plate placing unit, on which the light guiding plate to be detected is placed to receive light from the mixing cavity unit; and a detecting lens disposed above the light guiding plate placing unit for detecting a spectrum; wherein the mixing cavity unit is located at a side of the light guiding plate placing unit substantially in a same plane, and comprises a mixing cavity case, a lamp reflection cover disposed within the mixing cavity case, and a standard light source disposed in the lamp reflection cover; the mixing cavity case comprises an opening facing the light guiding plate placing unit; a light-passing slit is provided at the opening of the mixing cavity case, the light-passing slit is narrower than the opening of the mixing cavity case, and through the light-passing slit the light from the standard light source passes to form the linear light source; wherein the mixing cavity unit further comprises a light homogenizer disposed between the standard light source and the light-passing slit, the light homogenizer configured to homogenize the light from the standard light source to have uniform brightness in a horizontal direction.