Trifocal lens for a laser instrument

Details Trifocal lens for a laser instrument Trifocal lens for a laser instrument

1984-04-27

1987-07-07

Corbin, John K.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

250566, 235472, B29D 1318, G06K 710

Patent

active

046782885

ABSTRACT:
A laser instrument of the kind used to read or to detect light reflected from a target which is spaced from the laser instrument comprises a laser for generating a laser beam for transmission to the target, and a detector for detecting light reflected from the target and a trifocal, composite, single piece lens system. The trifocal lens system receives the laser beam from the laser at an angle which is off the optical axis of the lens system, routes the received laser beam onto the optical axis for transmission through the lens system and toward the target, collects light reflected from the target and images and transmits the collected light along the optical axis to the detector means. In a specific embodiment of the invention the trifocal, composite, single piece lens system is a plastic molded structure.

REFERENCES:
patent: 3991275 (1976-11-01), Balthuis
patent: 4496831 (1985-01-01), Swartz et al.

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