Differential pneumatic pressure zoom lens drive

Details Differential pneumatic pressure zoom lens drive Differential pneumatic pressure zoom lens drive

1993-06-08

1995-04-11

Ben, Loha

Optical: systems and elements

Lens

With support

359822, 359826, 359676, 359 691, G02B 702

Patent

active

054064171

ABSTRACT:
An optical apparatus (2) has a first optical element (4, 4a) and a second optical element (5, 5a). The first optical element (4, 4a) is disposed in the same optical path (3) as the second optical element (5, 5a). A first optical assembly (6a, 6b, 8, 8a, 10, 10a, 20, 22, 24, 70, 72) is disposed between the first optical element (4, 4a) and the second optical element (5, 5a) along the optical path (3). The optical apparatus (2) has pneumatic adjusting means (40, 42) for pneumatically adjusting the position of the first optical assembly (6a, 6b, 8, 8a, 10, 10a, 20, 22, 24, 70, 72) along the optical path 3 such that the focal length of the optical apparatus (2) is changed.

REFERENCES:
patent: 3612664 (1971-10-01), Berman
patent: 4286839 (1981-09-01), Ilzig et al.
patent: 4732458 (1988-03-01), Zambelli
patent: 4919519 (1990-04-01), Fantozzi et al.
patent: 5157554 (1992-10-01), Kashihara

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