Image pickup device suitable for dimensional measurement image p

Details Image pickup device suitable for dimensional measurement image p Image pickup device suitable for dimensional measurement image p

1991-06-26

1993-07-20

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250560, H01J 4014

Patent

active

052295974

ABSTRACT:
An image pickup device for dimensional measurement comprises a first pixel train serving as a main scale, comprised of pixels arranged at a first pitch (Pm); and a second pixel train serving as a vernier, comprised of pixels arranged at a second pitch (Ps) set to a length different from the first pitch (Pm), and disposed in parallel to the first pixel train. The second pixel train may employ an arrangement comprising N pixel trains, in which adjacent pixel trains are positionally shifted in succession by the second pitch (Ps). In this case, the second pitch (Ps) has the relationship of Pm/N (N is an integer equal to 3 or more) with respect to the first pitch (Pm).

REFERENCES:
patent: 4200788 (1980-04-01), Agulnek
patent: 4412745 (1983-11-01), Ohtomo et al.
patent: 4781463 (1988-11-01), Rosen et al.

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