Stereoendoscope having a folded sight line

Details Stereoendoscope having a folded sight line Stereoendoscope having a folded sight line

1995-09-07

1998-10-20

Nguyen, Thong

Optical: systems and elements

Compound lens system

Microscope

359377, 359381, 359831, G02B 2122

Patent

active

058255346

ABSTRACT:
The invention relates to a stereoendoscope having a sight line folded relative to the tube axis. The endoscope includes a distal front optic having a deflecting prism 4b. The deflecting prism 4b is mounted between a component 4a having a negative refractive power and a proximal component 4c having a positive refractive power. The inlet pupils 11 of the viewing component are imaged demagnified in the reflecting prism 4b by field optics (7, 7', 13) and transmitting optics (8, 8', 14). In this way, the beam can be guided free of vignetting without field cropping for both stereo channels through the endoscope tube and through the reflecting prism 4b even for a large object field angles and without image cropping. The endoscope tube 2 and the viewing component 1 are rotatable with respect to each other about the optical axis 12 within the endoscope tube 2 so that the line of sight can be changed for a viewing component fixed in space. The stereo basis remains for a rotation of the endoscope tube 2 fixed in space.

REFERENCES:
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patent: 5295477 (1994-03-01), Janfaza
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patent: 5377047 (1994-12-01), Broome et al.
patent: 5496261 (1996-03-01), Sander

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