Zoom magnifier

Details Zoom magnifier Zoom magnifier

1998-10-28

2000-09-26

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

359684, 359689, G02B 1514

Patent

active

061249858

ABSTRACT:
A zoom magnifier is composed of a positive first lens group, a negative second lens group, a positive third lens group, in this order from the eye side, wherein zooming is performed by moving the second lens group in the optical axis direction, and wherein the zoom magnifier satisfies the following condition:

REFERENCES:
patent: 4865434 (1989-09-01), Matsushita
patent: 5052787 (1991-10-01), Sugawara
patent: 5627682 (1997-05-01), Nagaoka
patent: 5828499 (1998-10-01), Ohtake
patent: 5835282 (1998-11-01), Suenaga et al.
patent: 5905596 (1999-05-01), Watanabe

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