Tube for a microscope

Details Tube for a microscope Tube for a microscope

1988-09-08

1989-11-07

McGraw, Vincent P.

Optics: measuring and testing

For light transmission or absorption

356219, 356225, G02B 2118, G01N 2159

Patent

active

048787574

ABSTRACT:
A microscope tube contains prisms mounted on a prism carriage switchable between a position for visual observation of a specimen and a position for photometry or photography of the specimen. A diaphragm (6) mounted on and movable with the carriage has a blocking position impeding entrance of light through the eyepiece window of the tube, and an ineffective or non-blocking position which does not impede entrance of such light. A manually operable handle in the form of a knob (9) mounted externally of the tube controls mechanical linkage parts (8, 10, 11) for shifting the diaphragm from its blocking position to its non-blocking position when the carriage is in the photometry or photography position, in case the user may wish to make a visual inspection of the specimen at that time. If the diaphragm has been moved to its non-blocking position, it returns automatically to its blocking position whenever the prism carriage is switched back from photometry or photography position to visual observation position, thus assuring that the diaphragm will not be accidentally in non-blocking position when the carriage is next shifted to the photometry or photography mode.

REFERENCES:
patent: 4790663 (1988-12-01), Faltermeier et al.

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