Laser optical system

Details Laser optical system Laser optical system

1987-11-27

1989-05-23

Scott, Jr., Leon

Coherent light generators

Particular component circuitry

Optical pumping

350 368, 372109, G02B 2742

Patent

active

048324469

ABSTRACT:
A laser optical system comprises a laser beam source, a beam diameter adjusting member disposed in the optical path of a laser beam emitted by the laser beam source and having an aperture through which only the center portion of the laser beam is to be passed, a converging lens for converging the laser beam passing through the aperture of the beam diameter adjusting member, and a spatial filter disposed in the vicinity of a convergence position of the laser beam for restricting the passage of the laser beam in at least one-dimension and allowing passage of only a zero-order light component converged to a predetermined position. Alternatively, the laser optical system comprises a laser beam source, and a density distribution filter disposed in the optical path of the laser beam emitted by the laser beam source for allowing passage of only the center portion of the laser beam in at least one-dimensional direction and gradually decreasing the transmittance toward the peripheral portion of the laser beam.

REFERENCES:
patent: 3868637 (1975-02-01), Schiller
patent: 3900884 (1975-08-01), St. John
patent: 4074361 (1978-02-01), Clow
patent: 4089589 (1978-05-01), Brockman et al.
patent: 4158176 (1979-06-01), Hunt et al.
patent: 4464021 (1984-08-01), Brown et al.
patent: 4656641 (1987-04-01), Scifres et al.

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