Optical: systems and elements – Lens – With light limiting or controlling means
Patent
1994-10-27
1997-11-04
Callahan, Timothy P.
Optical: systems and elements
Lens
With light limiting or controlling means
359739, 385 38, G02B 900
Patent
active
056846428
ABSTRACT:
An optical transmission system permitting any desired machining to be done by radiating to an object to be irradiated a laser beam having an optimum intensity distribution in the direction of its optical axis or in a plane perpendicular to the optical axis, comprising a laser oscillator 1, an optical fiber 3 for propagating the laser beam emitted from the laser oscillator 1 by a predetermined distance, a condenser lens 2 for converging the laser beam from the laser oscillator 1 into the optical fiber 3, a first lens 6 for forming images with aberration from the laser beam emerging from the optical fiber 3, a mask 7 disposed in a position having a predetermined light intensity distribution out of the positions of the images formed by the first lens 6, and a second lens 4 for forming the image passing through the mask 7 onto an object 5 to be irradiated.
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U. Zoske, et al, "Optimierung Dear Strahlparameter im Fokus einer Bearbeitungsoptik", in: IPA-IAO Forschung und Praxis, vol. T11, 1988, Springer-Verlag Berlin, et al pp. 196-205.
Miyamoto Teruo
Tanaka Masaaki
Yagi Toshinori
Zumoto Nobuyuki
Callahan Timothy P.
Kim Jung Ho
Mitsubishi Denki & Kabushiki Kaisha
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