Collapsible lens barrel with flexible substrate

Details Collapsible lens barrel with flexible substrate Collapsible lens barrel with flexible substrate

1999-01-08

2000-04-18

Blankenship, Howard B.

Photography

Having variable focal length of camera objective

396542, 359704, 359826, G03B 1700

Patent

active

060525355

ABSTRACT:
Because the keys located on the first rotating barrel have essentially the same inner diameter as the second rotating barrel, no unnecessary space is formed inside the first rotating barrel and the second rotating barrel. In addition, although the inner diameter of the keys of the first rotating barrel and the inner diameter of the second rotating barrel are essentially the same, because the keys engage with the straight advancement grooves on the second rotating barrel, the first rotating barrel and the second rotating barrel do not interfere with each other. Moreover, because the keys that are thinner than the second rotating barrel overlap with the second rotating barrel, said keys being inside the second rotating barrel, the thickness of the keys does not affect the outer diameter of the lens barrel at all. Therefore, it is only the first straight advancing barrel that is located outside the second rotating barrel to move out the second rotating barrel and that adds to the outer diameter of the lens barrel. Also, a flexible substrate is accommodated in an optical path space when the lens barrel is collapsed.

REFERENCES:
patent: 5079577 (1992-01-01), Nomura
patent: 5198932 (1993-03-01), Takamura
patent: 5581412 (1996-12-01), Tanaka
patent: 5652922 (1997-07-01), Kohno
patent: 5659810 (1997-08-01), Nomura et al.

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