Light diffusion device

Details Light diffusion device Light diffusion device

1981-05-18

1984-01-31

Sikes, William L.

Optics: measuring and testing

Inspection of flaws or impurities

Containers or enclosures

250223B, 362355, G01N 2100

Patent

active

044286732

ABSTRACT:
A light diffusion device has 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 inspection zone of the object.

REFERENCES:
patent: 2265037 (1941-12-01), Gulliksen
patent: 2589014 (1952-03-01), McLeod
patent: 2877342 (1959-03-01), Beach
patent: 3578837 (1971-05-01), Brooks
patent: 4076978 (1978-02-01), Brennan et al.

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