Method and device for focusing laser beam

Details Method and device for focusing laser beam Method and device for focusing laser beam

1996-03-13

1999-03-30

Spyrou, Cassandra

Optical: systems and elements

Mirror

Plural mirrors or reflecting surfaces

359365, 359859, 359201, 359208, G02B 510

Patent

active

058896260

ABSTRACT:
A laser beam condensing device which can be manufactured at low cost by using reflecting mirrors which can be machined at low cost. The device is capable of condensing a laser beam to a high energy density while eliminating any optical path difference, even if the optical axis of the incident beam strays. This device includes a first and a second reflecting mirror. An incident laser beam is deflected by these mirrors in the same direction. One of the two mirrors is a toroidal mirror, while the other is a spherical, cylindrical or toroidal reflecting mirror. The mirror surfaces of the two reflecting mirrors are machined so that the second reflecting mirror can cancel out any wave front aberrations of the laser beam reflected by the first reflecting mirror.

REFERENCES:
patent: 4396285 (1983-08-01), Presta et al.
patent: 4458302 (1984-07-01), Shiba et al.
patent: 5089915 (1992-02-01), Gobeli
patent: 5420882 (1995-05-01), Black
J.A. Murphy, International Journal of Infrared and Millimeter Waves, 8(9), 1165-1187 (1987).
N. Schuster, Feinwerktechnik & Messtechnik, 99(10), 433-435 (1991).

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