Short focal length long back focus objective

Details Short focal length long back focus objective Short focal length long back focus objective

1974-11-11

1976-03-16

Corbin, John K.

350175NG, 350176, 350204, G02B 934

Patent

active

039443388

ABSTRACT:
This invention relates to a short focal length, large aperture optical system having a relatively long back focus primarily designed to efficiently transmit monochromatic light rays to an image plane with an extraordinarily high degree of correction over a prescribed field.

REFERENCES:
patent: 3450463 (1969-06-01), Yasuda
patent: 3612661 (1971-10-01), Determann et al.

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