Article holding apparatus and its use

Details Article holding apparatus and its use Article holding apparatus and its use

1986-07-03

1987-03-24

Schmidt, Frederick R.

Optics: measuring and testing

By alignment in lateral direction

With registration indicia

356399, 269 21, G01B 1100

Patent

active

046521356

ABSTRACT:
An article holding apparatus provided with a plate on which an article is placed. A light transmitting opening is formed in the plate. There is provided an optical system optically connected to the light transmitting opening. Reflection light from a part of the undersurface of the article placed on the plate comes into the optical system through the light transmitting opening.

REFERENCES:
patent: 3752589 (1973-08-01), Kobayashi
patent: 3937579 (1976-02-01), Schmidt
patent: 4040736 (1977-08-01), Johannsmeier
patent: 4326805 (1982-04-01), Feldman et al.

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