Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1982-04-12
1984-12-25
Willis, Davis L.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356429, G01N 2186
Patent
active
044906188
ABSTRACT:
The apparatus for analyzing the surface of a fibrous web, such as a paper or a textile, includes a prism structure in which one surface is placed in contact with the fibrous web under a predetermined pressure. A collimated beam of light is directed into the prism on the contact surface. The light reflected from the contact surface through the prism is directed to a detector. The detector senses the light reflected by the contact surface as well as the light diffracted at the contact surface to indicate the surface condition of the fibrous web.
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"SELFOC" Single Microlens (SML), Nippon Sheet Glass Co., Ltd., Tokyo, Japan, 9/1/79.
Optics and Laser Technology, 6/1983, "Optical Inspection by Internal Reflection and Spatial Filtering", P. Cielo, pp. 145-149.
Brophy J.
Canadian Patents & Development Limited
Rymek Edward
Willis Davis L.
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