Method of projecting film frames and microfilm reader for carryi

Details Method of projecting film frames and microfilm reader for carryi Method of projecting film frames and microfilm reader for carryi

1985-10-10

1987-05-19

Frankfort, Charles

Optics: image projectors

Selective data retrieval

G03B 2300

Patent

active

046662723

ABSTRACT:
A microfilm reader with a lens holder moved independently of a lighting unit at right angles in relation to the beam path by means of a drive unit. This renders it possible to correctly position any of a plurality of lenses arranged side by side in the lens holder in relation to the frame to be projected. Given that the lighting unit and the lens holder are capable of moving independently of each other, it is furthermore possible to shift the lighting unit into a position above the respective frame to be projected to obtain an image that is optimally illuminated.

REFERENCES:
patent: 3963336 (1976-06-01), Haning et al.
patent: 4143953 (1979-03-01), Rauffer
patent: 4163611 (1979-08-01), Hall
patent: 4437738 (1984-03-01), Headley et al.
patent: 4443076 (1984-04-01), Itabashi
patent: 4456350 (1984-06-01), Drwiega
patent: 4482223 (1984-11-01), Koch et al.

Affiliated with

Also associated with

Rating

Method of projecting film frames and microfilm reader for carryi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of projecting film frames and microfilm reader for carryi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of projecting film frames and microfilm reader for carryi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1560755