Contact pattern observation apparatus

Details Contact pattern observation apparatus Contact pattern observation apparatus

1984-03-30

1987-07-21

McGraw, Vincent P.

Optics: measuring and testing

Document pattern analysis or verification

354 62, G06K 920

Patent

active

046814353

ABSTRACT:
An object contact pattern observation apparatus includes a prism body having a detection portion and a light absorbing portion located in such positions that any light transmitted through the prism body when no object is in contact with the detection portion. When an object is in contact with the detection portion, light from a light source radiated through the prism body to illuminate the detection portion is reflected therefrom as a visible contact image. The visible contact image is focused on a light recording device by a lens.

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Kingslake, "Applied Optics and Optical Engineering", vol. V, Optical Instruments Part II, 1969, pp. 8-10.

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