Focusing device for use in optical apparatuses

Details Focusing device for use in optical apparatuses Focusing device for use in optical apparatuses

1987-07-16

1988-12-06

Hix, L. T.

Photocopying

Projection printing and copying cameras

Focus or magnification control

355 56, G03B 2752

Patent

active

047898801

ABSTRACT:
A focusing device for use in micro film readers or the like for projecting micro images to give in-focus conditon exactly and readily. The present device includes a memory for storing a distance data representing the distance between an original and a projective lens at in-focus position thereof, and a sensor for measuring the distance between an original and the projective lens wherein the projective lens is moved to the in-focus position by a focusing motor in response to the distance data stored in the memory and a signal representing the measured distance generated from the sensor.

REFERENCES:
patent: 4696559 (1987-09-01), Kondo

Affiliated with

Also associated with

Rating

Focusing device for use in optical apparatuses does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Focusing device for use in optical apparatuses, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Focusing device for use in optical apparatuses will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1495915