Stereomicroscope including two pair of polarizers and a quarter

Details Stereomicroscope including two pair of polarizers and a quarter Stereomicroscope including two pair of polarizers and a quarter

1992-03-30

1994-04-12

Henry, Jon W.

Optical: systems and elements

Compound lens system

Microscope

359386, 359377, G02B 2122, G02B 2136, G02B 2106

Patent

active

053030826

ABSTRACT:
A stereomicroscope comprising a pair of observation systems each comprising an objective lens and an eyepiece lens, a pair of light sources disposed above the objective lens for emitting a pair of light beams through a pair of beam splitters into the observation systems coaxially therewith, pairs of polarizers disposed on the side of the eyepiece lenses and the side of the light sources respectively so as to have polarizing surfaces perpendicular to each other, a quarter wavelength plate interposed between the objective lens and a sample to be observed, and a pair of light beam deflecting members disposed between the beam splitters and the objective lens. The polarizers disposed on the side of the eyepiece lenses are removable from optical paths and eyepiece tubes are arranged with the polarizers disposed on the side of the eyepiece lenses interposed between the eyepiece tubes and an intermediate tube containing the pair of light beam deflecting members and the polarizers disposed on the side of the eyepiece lenses. This stereomicroscope permits locating eye points thereof at low positions close to microscopists and quickly switching microscopic modes from one to another.

REFERENCES:
patent: 3405990 (1988-10-01), Nathnagle et al.
patent: 4763968 (1988-08-01), Minami et al.
patent: 4802749 (1989-02-01), Togino et al.
patent: 5052789 (1991-10-01), Kleinberg

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