Anamorphic illuminating optical system

Details Anamorphic illuminating optical system Anamorphic illuminating optical system

1990-05-18

1993-03-02

Arnold, Bruce Y.

Optical: systems and elements

Lens

Anamorphic

359710, 359711, G02B 1308

Patent

active

051914743

ABSTRACT:
An illuminating optical system for use in a microfilm reader/printer or the like for illuminating a film comprises an axially symmetric lens system and an anamorphic lens system. The anamorphic lens system includes a condenser lens opposed to a light source. The microfilm reader/printer having such an illuminating optical system causes the axially symmetric lens system to illuminate the microfilm during a reading operation, and the anamorphic lens system to illuminate the film during a printing operation.

REFERENCES:
patent: 2720813 (1955-10-01), Cox
patent: 4278334 (1981-07-01), Maeda
patent: 4756583 (1988-07-01), Morimoto
patent: 4825243 (1989-04-01), Ito et al.

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