Diode laser co-linear light beam generator

Details Diode laser co-linear light beam generator Diode laser co-linear light beam generator

1994-09-23

1996-03-19

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

2505593, 356153, 356138, 33286, G01B 1126

Patent

active

055005241

ABSTRACT:
The present invention relates to the efficient and cost-effective generation of two co-linear laser beams for the purpose of alignment, particularly in the construction industry. The unequal divergence of the light from a typical laser diode produces a beam of elliptical cross section. Two roughly equal co-linear beams of light can be generated by reflecting the collimated elliptical beam from two mirror surfaces at 90.degree. to each other or a single element dividing the elliptical beam in two. Techniques are described for generating offset parallel beams, and for correcting for inherent knife-edge diffraction effects due to division of the beam.

REFERENCES:
patent: 4252439 (1987-02-01), Drozella
patent: 5144487 (1992-09-01), Hersey

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