Trifocal lens for a laser instrument

Patent · Tue Jul 07 04:00:00 EDT 1987

OSTI ID:6249306

Lonsdale, R J; Hellekson, R A

A composite, single piece, lens system is described for a laser instrument of the kind used to read or to detect light reflected from a target which is spaced from the laser instrument, the lens system comprising: an optical axis for the composite, single piece, lens system, first optical means for receiving a laser beam which is generated and which is transmitted to the lens system at an angle which is off the optical axis and for routing the received laser beam onto the optical axis for transmission through the lens system toward the target; second optical means for collecting light reflected from the target and for imaging the collected light along the optical axis to detector means associated with the lens system, the first optical means including a beam expander element, a prism, and a focusing element; the second optical means includes a collection lens having a first curved surface on a side which receives the light reflected from the target and a second curved surface on a side facing the detector means; and where the first optical means and the second optical means are embodied in a composite, single piece lens structure.

• Assignee: Spectra-Physics, Inc., San Jose, CA
• Patent Number(s): US 4678288
• OSTI ID: 6249306
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
ELECTROMAGNETIC RADIATION
INCIDENCE ANGLE
LASER RADIATION
LASER TARGETS
LASERS
LENSES
PRISMS
RADIATIONS
REFLECTION
ROUTING
SPACE DEPENDENCE
TARGETS
VISIBLE RADIATION