Anti-reflection structure for zoom lens barrel

Details Anti-reflection structure for zoom lens barrel Anti-reflection structure for zoom lens barrel

1994-12-01

1997-02-18

Epps, Georgia Y.

Optical: systems and elements

Lens

With variable magnification

359823, G02B 1514

Patent

active

056046383

ABSTRACT:
An anti-reflection structure for a zoom lens barrel is provided in a camera to prevent harmful internal reflection caused by the surface of a shaft for transmitting rotation force. The anti-reflection structure includes a rotation cylinder linearly movable in the direction of the optical axis while rotating; a shaft positioned in the rotation cylinder and rotated by a drive source, and a pinion fitted on the shaft to be slidable in the axial direction thereof so as to move in a direction parallel to the optical axis together with the rotation cylinder. The pinion transmits the rotation of the shaft to the rotation cylinder. A contact guide portion is formed on the shaft for allowing the pinion to slidably move on the contact guide portion and a non-contact portion is formed on the shaft which does not contact the pinion. An anti-reflection mechanism is formed on the non-contact portion for preventing light from being reflected on the non-contact portion.

REFERENCES:
patent: 4911542 (1990-03-01), Nishio et al.
patent: 4944030 (1993-05-01), Haraguchi et al.
patent: 5012273 (1991-04-01), Nakamura et al.
patent: 5033819 (1991-07-01), Tanaka
patent: 5034762 (1991-07-01), Kohmoto
patent: 5115350 (1992-05-01), Tanaka
patent: 5144493 (1992-09-01), Nomura
patent: 5221993 (1993-06-01), Nomura
patent: 5343331 (1994-08-01), Kohmoto et al.

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