Lens mirror cylinder having two movable lenses and a diaphragm u

Details Lens mirror cylinder having two movable lenses and a diaphragm u Lens mirror cylinder having two movable lenses and a diaphragm u

1996-03-06

1998-01-13

Nelms, David C.

Optical: systems and elements

Lens

With support

359822, 359696, G02B 1514, G02B 702

Patent

active

057085358

ABSTRACT:
A lens mirror cylinder having first and second movable lens structures, constructed by assembling in a mirror cylinder a plurality of magnetic circuit means arranged on the outer periphery side of the second movable lens structure, guided so that it can move in the light axis direction of the lens, so as to face each other across the light axis, a first lens driving means for driving the first movable lens structure arranged at a position on the outer periphery side of the second movable lens structure in which the magnetic circuits are not arranged, and a lens diaphragm unit. By this construction, the space of the lens mirror cylinder can be effectively utilized, and a reduction of size of the lens mirror cylinder and the camera using the lens mirror cylinder is realized.

REFERENCES:
patent: 4568142 (1986-02-01), Iguma
patent: 4608676 (1986-08-01), Yoshida
patent: 4660190 (1987-04-01), Fujii
patent: 4706232 (1987-11-01), Funada
patent: 4920420 (1990-04-01), Sano et al.
patent: 5109368 (1992-04-01), Ohta
patent: 5541777 (1996-07-01), Sakamoto

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