Observation apparatus with selective light diffusion

Details Observation apparatus with selective light diffusion Observation apparatus with selective light diffusion

1983-11-18

1987-02-24

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

219121LZ, H01J 314

Patent

active

046459243

ABSTRACT:
An observation apparatus includes a laser beam source for producing a laser beam, a condensing optical system for constituting an optical path to condense the laser beam onto an object, a scanner for repeatedly scanning the object with the laser beam, an observation optical system for allowing an operator to observe the object, a photoreceptor for receiving the laser beam reflected by the object and producing an electric signal, a retractable refracting or diffusing optical element, across the condensing optical path, wherein the beam reflected by the object is detected by the photoreceptor when the object is scanned with the condensed laser beam, and the beam reflected by the object is observed through the observation optical system when the object is scanned with the diffused laser beam.

REFERENCES:
patent: 4251129 (1981-02-01), Suzki et al.
patent: 4266876 (1981-05-01), Nakazawa et al.
patent: 4437758 (1984-03-01), Suzuki

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