Ultra-high resolution reducing lens system

Details Ultra-high resolution reducing lens system Ultra-high resolution reducing lens system

1976-10-12

1978-03-21

Clark, Conrad J.

350175ML, 350215, G02B 1134, G02B 1132, G02B 2102

Patent

active

040800482

ABSTRACT:
An ultra-high resolution reducing lens system comprising a lens group I having negative refractive power and a lens group II having positive refractive power which are arranged by providing a large airspace between them. The ultra-high resolution lens system is compactly designed but has a long working distance. Moreover, the quantity of light does not decrease in the marginal portion of the field, resolution is high, aperture ratio is F1.0 and magnification is .times.1/100.

REFERENCES:
patent: 3450463 (1969-06-01), Yasuda
patent: 3551031 (1970-12-01), Grey
patent: 3664728 (1972-05-01), Yuta
patent: 3719413 (1973-03-01), Lechner
patent: 3759606 (1973-09-01), VanOrden
patent: 3806231 (1974-04-01), Taira

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