Readout lens

Details Readout lens Readout lens

1996-10-07

1998-03-24

Nelms, David C.

Optical: systems and elements

Lens

Multiple component lenses

359772, 359773, 359775, 359779, 359768, G02B 936, G02B 934, G02B 960

Patent

active

057319154

ABSTRACT:
In a Xenotar type image-readout lens of a four-group five-element configuration, predetermined conditional expressions are satisfied so as to attain a bright lens system, while favorably correcting chromatic aberration. In a Xenotar type lens system composed of five sheets of lenses (L.sub.1 to L.sub.5), the second lens (L.sub.2) and the third lens (L.sub.3) are cemented together, a stop (i) is disposed between the third lens (L.sub.3) and the fourth lens (L.sub.4), and the following conditional expressions are satisfied:

REFERENCES:
patent: 2683395 (1954-07-01), Klemt et al.
patent: 2683398 (1954-07-01), Klemt et al.
patent: 2831395 (1958-04-01), Klemt
patent: 3884557 (1975-05-01), Nakamura

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