High-magnification wide-field-of-view telemicroscopic lens confi

Details High-magnification wide-field-of-view telemicroscopic lens confi High-magnification wide-field-of-view telemicroscopic lens confi

1993-07-19

1995-02-28

Sugarman, Scott J.

Optical: systems and elements

Lens

Afocal

359795, G02B 1300

Patent

active

053942728

ABSTRACT:
A telemicroscopic lens configuration for high quality optical imaging applications which provides high magnification of a work area with a wide field of view. The telemicroscopic lens configuration is a Galilean-type configuration having a positive-power objective lens and a negative-power eyepiece lens separated by an air space. The focal length of the objective lens and the air space distance are optimized to provide the magnification and overall effective focal length of the instrument. The focal length of the eyepiece lens is chosen so that the object being magnified appears in front of the viewer. Different lens materials are selected to minimize polychromatic aberrations. The shape of the objective lens, including radius of curvature and thickness of each lens element, is optimized to minimize monochromatic aberrations, which principally include spherical aberration and coma. The shape of the eyepiece lens, in conjunction with the shape of the objective lens, helps to further reduce monochromatic aberrations and increase the depth of field.

REFERENCES:
patent: 1467804 (1923-09-01), Merte
patent: 2390387 (1945-12-01), Rayton et al.
patent: 3273456 (1966-09-01), Feinbloom
patent: 3663094 (1972-05-01), Bertle
patent: 4390249 (1983-06-01), Rusinov et al.
patent: 4768866 (1988-09-01), Wickholm et al.

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