Illuminating system for producing prints on variable contrast ph

Details Illuminating system for producing prints on variable contrast ph Illuminating system for producing prints on variable contrast ph

1981-04-28

1983-01-18

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Multicolor picture

G03B 2772, G03B 2776

Patent

active

043689744

ABSTRACT:
An elongated two-color light-transmitting filter strip of a light-transmitting material has a first zone of its length which transmits light in a first of two mutually exclusive wavebands, a last zone which transmits light in the second of two mutually exclusive wavebands, and a middle zone of the strip having discrete elements which transmit light in the first of the two mutually exclusive wavebands and discrete elements which transmit light in the second of the two mutually exclusive wavebands, the elements having equal areas and being so arranged that there is a progressive change in the transmission of light in the two mutually exclusive wavebands along the middle part of the strip and being so arranged that there is no single line of demarcation dividing that part of the filter which transmits light only in the first of the two mutually exclusive wavebands from that part of the filter which transmits light only in the second of the two mutually exclusive wavebands. An illuminating system comprising this filter strip and a lamphouse in which the illuminating system and filter strip can be used are likewise described.

REFERENCES:
patent: 2734435 (1956-02-01), Leonardi
patent: 3089386 (1963-05-01), Hunt
patent: 3205767 (1965-09-01), Weber et al.
patent: 3418048 (1968-12-01), Veit
patent: 3531199 (1970-09-01), Burger et al.
patent: 3536402 (1970-10-01), Aston
patent: 3901598 (1975-08-01), Vanheerentals

Affiliated with

Also associated with

Rating

Illuminating system for producing prints on variable contrast ph does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Illuminating system for producing prints on variable contrast ph, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Illuminating system for producing prints on variable contrast ph will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-135701