Lens barrel with improved drum arrangement

Details Lens barrel with improved drum arrangement Lens barrel with improved drum arrangement

1993-01-22

1995-01-10

Look, Edward K.

Optical: systems and elements

Lens

With support

359826, G02B 702

Patent

active

053812727

ABSTRACT:
A lens barrel including a fixed drum, a rotary drum rotatably fitted in the fixed drum and a lens drum, disposed in the rotary drum, for accommodating lens. The lens drum is movable in the optical-axis direction of the lens with a rotation of the rotary drum. The lens barrel has an adjusting drum disposed in a subject-side position between the fixed drum and the rotary drum. The adjusting drum thread-engages with the fixed drum. The adjusting drum is, when rotated, moved in the optical-axis direction. With this movement, the rotary drum and the lens drum also move in the optical-axis direction, thus adjusting a relative position of the rotary drum with respect to the fixed drum.

REFERENCES:
patent: 3119891 (1964-01-01), Ferrari et al.
patent: 3744884 (1973-07-01), Filipovich et al.
patent: 4564264 (1986-01-01), Komoto
patent: 4822153 (1989-04-01), Tomori et al.
patent: 5144493 (1992-09-01), Nomura

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