Stereoscopic microscope with convergent optics provided with a s

Details Stereoscopic microscope with convergent optics provided with a s Stereoscopic microscope with convergent optics provided with a s

1996-11-19

2000-06-27

Nguyen, Thong

Optical: systems and elements

Compound lens system

Microscope

359363, 359368, G02B 2122, G02B 2136

Patent

active

060813725

ABSTRACT:
A stereoscopic microscope which makes use of two pairs of lenses, each pair having a different magnification. Both pairs of lenses are supported in a disk-shaped drum along a pair of orthogonally related diameters and rotatable through an angle of 90.degree. by a draw lever to place the two pairs of lenses alternatively in position for use by an operator for a direct observation of the image of the patient's eye structure and for all operating functions of a video recording camera. The optical scheme makes use in one direction of a right-angle prism arrangement for deviating rays from a patient's eye in an opposite direction, towards the video recording camera. Two reflecting prisms are provided along the direct observation position through the pairs of lenses aligned with eyepieces of the microscope and the operator sees the image reproduced by the first pair of lenses in presence of one magnification or by the other pair of lenses in the presence of the other magnification with rectified images in both cases by reflecting prisms.

REFERENCES:
patent: 4138191 (1979-02-01), Peyman et al.
patent: 4277130 (1981-07-01), Takahashi
patent: 4640588 (1987-02-01), Tanaka
patent: 4657356 (1987-04-01), Matsumura
patent: 4674845 (1987-06-01), Matsumura
patent: 4991947 (1991-02-01), Sander et al.

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