Radiation projecting device

Details Radiation projecting device Radiation projecting device

1990-08-09

1993-06-29

Dzierzynski, Paul M.

Optical: systems and elements

Optical aperture or tube, or transparent closure

385119, 353122, 350 9631, G02B 500

Patent

active

052239861

ABSTRACT:
A device is provided for expanding, reshaping, modifying the intensity distribution and projecting a beam of radiation such as light. The present invention comprises a four sided, internally mirrored tube of polygonal (i.e., rectangular) cross-section wherein the cross-sectional area of the tube expands (generally linearly) with respect to tube length from a first end to a second end. The first end of the tube is associated with a plano-concave (or equivalent) lens and the second end of the tube is associated with a generally flat pane exit optic which includes optical edging for refracting perimeter rays back into the desired field of view. A practical application for the present invention is laser photogrammetry wherein typically it is desired (1) to expand a laser beam of circular cross-section, (2) to reshape the beam into a desired cross-section, usually rectangular, and (3) to project the reshaped beam upon a distant surface.

REFERENCES:
patent: 2558492 (1951-06-01), Lely et al.
patent: 3257507 (1966-06-01), Borberg et al.
patent: 3558220 (1971-01-01), Werner
patent: 3801181 (1974-04-01), Kitano et al.
patent: 3832028 (1974-08-01), Kapron
patent: 4725135 (1988-02-01), Browning
patent: 4862257 (1989-08-01), Ulich

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