Microfilm image processing apparatus having automatic focus cont

Details Microfilm image processing apparatus having automatic focus cont Microfilm image processing apparatus having automatic focus cont

1989-06-29

1991-04-09

Cuchlinski, Jr., William A.

Optics: image projectors

Lens support

Lens position adjustable

353122, 353 76, 352140, G03B 2153, G03B 2734

Patent

active

050059670

ABSTRACT:
A microfilm image reader apparatus for detecting an image on a microfilm strip and projecting the detected image onto a target plane, wherein a beam of light bearing an image detected from the microfilm strip is produced by illuminating the microfilm strip and is projected through a projection lens onto the target plane, and wherein an automatic mode of focus control is established through detection of a condition in which the image-bearing beam is focussed with respect to the target plane and, when it is detected that the automatic mode of focus control is inoperable, the projection lens is automatically moved to a position having its focal plane located on a predetermined plane with respect to the target plane and, after the projection lens is moved to such a position, the focal plane of the projection lens may be manually adjusted by the operator of the apparatus.

REFERENCES:
patent: 4010479 (1977-03-01), Nobusawa
patent: 4156563 (1979-05-01), Kato et al.
patent: 4163611 (1979-08-01), Hall
patent: 4174890 (1979-11-01), Johnson et al.
patent: 4268135 (1981-05-01), Lehto
patent: 4386833 (1983-06-01), Hirose
patent: 4415244 (1983-11-01), Daly et al.
patent: 4762985 (1988-08-01), Imai et al.
patent: 4789880 (1988-12-01), Mori et al.

Affiliated with

Also associated with

Rating

Microfilm image processing apparatus having automatic focus cont does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Microfilm image processing apparatus having automatic focus cont, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microfilm image processing apparatus having automatic focus cont will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2030577