Scanning heads for transparencies

Details Scanning heads for transparencies Scanning heads for transparencies

1977-06-22

1979-11-06

Corbin, John K.

Optics: measuring and testing

For light transmission or absorption

250252, G01N 2106

Patent

active

041734165

ABSTRACT:
For presetting values of parameters in an image-reproducing process, an operator selects a spot on a transparency to be reproduced, for example by visual inspection of a projected image of an area of the transparency illuminated by a defocused light beam. The light beam is then temporarily brought to a focus on the selected spot and the light transmitted through the transparency on a photomultiplier, the signal from which is sampled within a very short period and held, after which the focused light beam is again defocused to enable the operator to select a further spot. The value of the sample signal is used in the presetting of the said parameter values. The period for which the focused light beam falls on the transparency is made small enough to avoid the bleaching of the transparency at the illuminated spot.

REFERENCES:
patent: 3244062 (1966-04-01), Sweet
patent: 3406290 (1968-10-01), Brueschke
patent: 3711209 (1973-01-01), Caspersson et al.
patent: 4025189 (1977-05-01), Pugsley
patent: 4061428 (1977-12-01), Amano et al.

Affiliated with

Also associated with

Rating

Scanning heads for transparencies does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Scanning heads for transparencies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scanning heads for transparencies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-460138