Light diffusion device

Details Light diffusion device Light diffusion device

G - Physics

02

B

88/121

G02B 5/20 (2006.01) G01N 21/90 (2006.01) G01N 33/00 (2006.01)

Patent

CA 1156079

ABSTRACT OF THE DISCLOSURE A light diffusion device having a plurality of rough surfaces with different roughnesses which are placed at a light source side of an object to be inspected. The plurality of rough surfaces consecutively diffuse the light emitted from the light source. The diffused light then passes the inspection zone of the object to which a photosensing means is faced from the opposite side to the light source, into which the diffused light is introduced from the light diffusion device after passing the inspec- tion zone of the object.

380541

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