Multiple magnification optical assembly

Details Multiple magnification optical assembly Multiple magnification optical assembly

1980-12-22

1982-07-06

Hix, L. T.

Photocopying

Projection printing and copying cameras

Focus or magnification control

355 8, G03B 2750, G03B 2770

Patent

active

043380220

ABSTRACT:
A variable magnification optical assembly having a housing with a fixed location for its object and image windows, and a carriage which is linearly moveable within the housing and which has mounted thereon at least one mirror. The carriage mirror(s) cooperates with at least one mirror affixed on the housing to define a first and a second light path within the optical assembly; with the respective paths being dependent upon the position of the carriage within the housing. The various mirrors are positioned within the optical assembly such that the light paths have different conjugate ratios. Therefore, a change in the magnification obtained within the assembly is accomplished with only a linear displacement of the carriage.

REFERENCES:
patent: 3543289 (1970-11-01), Koizumi
patent: 3837743 (1974-09-01), Amemiya
patent: 4029409 (1977-06-01), Spinelli et al.
patent: 4084897 (1978-04-01), Queener
patent: 4105326 (1978-08-01), Mochimaru
patent: 4118118 (1978-10-01), Barto
patent: 4232960 (1980-11-01), Glab

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