Four component zoom lens

Details Four component zoom lens Four component zoom lens

1983-02-02

1986-11-25

Corbin, John K.

350429, G02B 1500, G02B 1515

Patent

active

046245367

ABSTRACT:
A zoom lens in which two pairs of optical elements of the lens are each movable simultaneously relative to each other to attain desired magnification while maintaining the image surface of the lens system substantially fixed.
A common body supporting both sets of lens elements can be moved if required to maintain the focal plane of the lens system fixed. The need for moving the body may arise where the movement of the lens elements causes a shift or displacement of the focal plane of the zoom lens.

REFERENCES:
patent: 2741155 (1956-04-01), Hopkins
patent: 3051052 (1962-08-01), Bergstein
patent: 3549242 (1970-12-01), Higuchi et al.
patent: 4232942 (1980-11-01), Ikamori

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