Lens barrel having a reduced diameter

Details Lens barrel having a reduced diameter Lens barrel having a reduced diameter

1996-08-26

1998-04-14

Nelms, David C.

Optical: systems and elements

Lens

With support

359700, 359701, G02B 702, G02B 1514

Patent

active

057399670

ABSTRACT:
A lens barrel comprises a lens unit movable in an optical-axis direction of the lens barrel, and a lens holding drum, having a sliding portion protruded in the optical-axis direction at its end portion, for holding the lens unit. The lens barrel also comprises a fixed drum having the same diameter as that of the lens holding drum and provided with a guiding portion at its end portion, for accommodating the sliding portion and rectilinearly guiding the sliding portion in the optical-axis direction, and a driving mechanism for driving the lens unit with action upon the lens holding drum.

REFERENCES:
patent: 4089590 (1978-05-01), Sakata
patent: 4154510 (1979-05-01), Katagiri
patent: 4993815 (1991-02-01), Yamazaki et al.
patent: 5218479 (1993-06-01), Chiou et al.
patent: 5285322 (1994-02-01), Horning et al.
patent: 5376983 (1994-12-01), Yamazaki et al.
patent: 5446593 (1995-08-01), Hamasaki et al.

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