Optical: systems and elements – Compound lens system – Microscope
Patent
1993-07-14
1996-07-09
Nguyen, Thong
Optical: systems and elements
Compound lens system
Microscope
359368, 359381, 359385, G02B 2106, G02B 2100
Patent
active
055350526
ABSTRACT:
In a microscope with a laser illumination, the laser beam is coupled in over the reflected light illumination beam path from the rear side of the microscope stand. The reflected light illumination reflectors are received in a slide with several switching positions. In one switching position, the slide is fitted with a fully reflecting mirror. The position of the fully reflecting mirror is monitored by sensors. The sensors are coupled to a shutter, such that the laser beam is only released when the fully reflecting mirror is inserted. The microscope is constructed as a laser scanning microscope of the inverted type. Sensors are also provided on a pivotable arm that supports a housing. The housing holds a transmitted light condensor and folding mirror above the object stage, and protects against inadvertently looking into the laser light. The signals from both sensors are connected together in the sense of a logic AND circuit, The laser beam path is closed by the shutter (and the laser is released) only when both sensors signal a safe state.
REFERENCES:
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patent: 3551019 (1970-12-01), Michel
patent: 3798435 (1974-03-01), Schindl
patent: 3851949 (1974-12-01), Kraft et al.
patent: 4549787 (1985-10-01), Tauner
patent: 4756611 (1988-07-01), Yonekubo et al.
patent: 4843242 (1989-06-01), Doyle
patent: 4965441 (1990-10-01), Picard
patent: 5011243 (1991-04-01), Doyle et al.
Volker Wilke et al, "GIT Fachz . . . ", Zeiss, West Germany, 1984, brochure, 6 pages.
Carl-Zeiss-Stiftung
Nguyen Thong
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