Optical lens moving mechanism

Details Optical lens moving mechanism Optical lens moving mechanism

1983-12-07

1986-04-22

Corbin, John K.

350255, G02B 710

Patent

active

045838275

ABSTRACT:
An optical lens moving mechanism for zoom lens systems using a plane cam is disclosed. A lens system having an optical axis comprises at least two lens groups. A first lens holder and a second lens holder which respectively hold the two lens groups are moved along a guide parallel with the optical axis by a rotational movement of the plane cam which moves on a plane parallel with the optical axis, to zoom the lens system. The mechanism further includes a zooming motor, a position detector, and a controller to control the rotation of the motor, according to the zooming position of the lens system, to achieve a uniform zooming speed.

REFERENCES:
patent: 2746350 (1956-05-01), Hopkins
patent: 3267828 (1966-08-01), Raab
patent: 3336095 (1967-08-01), Thevenaz
patent: 3506338 (1970-04-01), Holderbaum
patent: 3533344 (1970-10-01), Thomas
patent: 3567317 (1971-03-01), Plummer
patent: 4367015 (1983-01-01), Waltuck et al.
patent: 4445757 (1984-05-01), Enomoto et al.

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