Optical: systems and elements – Lens – With variable magnification
Patent
1992-01-21
1993-06-08
Arnold, Bruce Y.
Optical: systems and elements
Lens
With variable magnification
359701, 359704, 359826, G02B 1514, G02B 702
Patent
active
052184790
ABSTRACT:
Disclosed herein is an improved zoom lens fixing mechanism comprising a fixing sleeve, a cam sleeve, a front lens holder, a rear lens holder, a back cover, and four rollers, in which the fixing sleeve has a cam slot and three long slots and the cam sleeve has a long slot and three cam slots. The front lens holder has three screw holes and the rear lens holder has one screw hole. During the assembling, or fixing, of the improved zoom lens of the present invention, the rollers are first affixed into respective screw holes. The rollers affixed to the front lens holder are placed into the long slots on the fixing sleeve and the cam slots on the cam sleeve, which also sleeves around the fixing sleeve. Whereas, the roller affixed to the rear lens holder is placed into the cam slot on the fixing sleeve and the long slot on the cam sleeve. All the cam slots and the long slots are connected to recesses in the form of notches or slot openings which extend to a longitudinal end of either the fixing sleeve or the cam sleeve to receive the rollers. The back cover has four pins to be inserted into the recesses to prevent the rollers from falling out of the slots.
REFERENCES:
patent: 3817601 (1974-06-01), Colaiace et al.
patent: 4154510 (1979-05-01), Katagiri
patent: 4759618 (1988-07-01), Kamata
patent: 4993815 (1991-02-01), Yamazaki et al.
Cheng Chen-Chin
Chiou Yee-Haur
Huang Tsai-Jeon
Arnold Bruce Y.
Industrial Technology Research Institute
Lester Evelyn A.
Liauh W. Wayne
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