Light-weight high-magnification clinical viewer

Details Light-weight high-magnification clinical viewer Light-weight high-magnification clinical viewer

1995-06-07

1998-08-04

Nguyen, Thong

Optical: systems and elements

Lens

Afocal

359362, 359399, G02B 1300, G02B 2300

Patent

active

057903239

ABSTRACT:
The light-weight high-magnification clinical viewer includes a three-element objective lens and a two-element eyepiece lens. Use of multiple lenses allows for a more compact package. The doublet eyepiece lens serves to reduce chromatic aberration at high magnification. The triplet objective serves to avoid vignetting while providing a wide field of view and reduced chromatic aberration. Image quality is further enhanced, while keeping the weight of the viewer down, through the use in the objective of light-weight high index glass.

REFERENCES:
patent: 962920 (1910-06-01), Rohr
patent: 4390249 (1983-06-01), Rusinov et al.
patent: 5394272 (1995-02-01), Kvamme et al.
patent: 5515209 (1996-05-01), Buchroeder et al.

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