Optical imaging system having variable focal length

Details Optical imaging system having variable focal length Optical imaging system having variable focal length

1980-06-06

1982-05-11

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

354 25, G03B 300

Patent

active

043295789

ABSTRACT:
An imaging system, particularly for application in a camera with a zoom lens, having at least two lenses with variable distance from a fixed image plane, means for adjusting one of the lenses for setting the resultant focal length of the system, and automatic means for adjusting the position of the other lens, or of the entire lens system including any other lenses, by means of a focus determining element in the fixed image plane.

REFERENCES:
patent: 4083057 (1978-04-01), Quinn

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