Lens system for a head separated type charge coupled device came

Details Lens system for a head separated type charge coupled device came Lens system for a head separated type charge coupled device came

1996-01-04

1998-02-03

Sugarman, Scott J.

Optical: systems and elements

Lens

Telephoto

359745, 359762, 359788, 359789, 359790, G02B 1302, G02B 914, G02B 962

Patent

active

057150982

ABSTRACT:
Disclosed is a telephoto-type lens system of a head separated charge coupled device (CCD) camera, which includes a first lens group having a positive focal length, a second lens group having a negative focal length, and a third lens group. The first lens group has a first convex lens surface facing an object and an upper convex surface. The third lens group has a second lens with a negative focal length joined to a first lens with a positive focal length. An image angle greater than 29.degree. and high definition images can be achieved with the present invention.

REFERENCES:
patent: 2366597 (1945-01-01), Cox
patent: 2502508 (1950-04-01), Cook
patent: 5434713 (1995-07-01), Sato

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