Optical sensor projecting an image of the sensor for alignment p

Details Optical sensor projecting an image of the sensor for alignment p Optical sensor projecting an image of the sensor for alignment p

1990-10-19

1992-08-25

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250566, G01J 120, H01J 4014

Patent

active

051421356

ABSTRACT:
An alignment system for an optical sensor projects an alignment image coincident with the field-of-view of the sensor. The alignment image is produced by illuminating a non-specular reflecting surface co-planar with the photosensitive element of the sensor and using the same lens as that which receives the image of the imaged object to project that image on the imaged object for alignment purposes. The light source may be turned off for normal use of the optical sensor.

REFERENCES:
patent: 4694182 (1987-09-01), Howard
patent: 4740675 (1988-04-01), Brosnan et al.
patent: 4742217 (1988-05-01), Wilwerding
patent: 4818886 (1989-04-01), Drucker
patent: 4831275 (1989-05-01), Drucker
patent: 4963756 (1990-10-01), Quan et al.

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