Apparatus for receiving radiation only within predetermined angu

Details Apparatus for receiving radiation only within predetermined angu Apparatus for receiving radiation only within predetermined angu

1987-04-15

1989-07-25

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356237, 356430, 250216, G01N 2188, G01N 2189

Patent

active

048516961

ABSTRACT:
Apparatus for detecting discontinuities in a radiation diffusing surface (10) such as paper. Radiation is passed to the surface and a radiation collector (19) receives the diffused radiation (18) from a limited area of the surface (10). The radiation collector receives the diffuse radiation from a limited area only and from within predetermined angular limits other than normal to the surface. The radiation collector (19) defines said predetermined angular limits through total internal reflection.

REFERENCES:
patent: 4004152 (1977-01-01), Obser et al.
patent: 4378159 (1983-03-01), Galbraith
patent: 4601576 (1986-07-01), Galbraith

Affiliated with

Also associated with

Rating

Apparatus for receiving radiation only within predetermined angu does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for receiving radiation only within predetermined angu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for receiving radiation only within predetermined angu will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2360385