Zoom lens

Details Zoom lens Zoom lens

1997-09-09

1999-11-23

Mai, Huy

Optical: systems and elements

Lens

With variable magnification

359689, 359691, G02B 1514

Patent

active

059910968

ABSTRACT:
A zoom lens comprises a plurality of lens elements arranged in at least two zooming lens units. The zoom lens is characterized in that at least one of the zooming lens units moves in a first direction, then reverses the direction of the movement to move in a second direction and then reverses the direction again to move in the first direction.

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patent: 5446592 (1995-08-01), Kohno et al.
patent: 5793536 (1998-08-01), Sato

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