Laser line-generator and laser line-generator module
AssigneeAyase Co., Ltd
InventorsChiaki Kojima, Ja Koo, Hiroyuki Imai
Life of this patent
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Abstract
An object of the invention is to provide a laser line-generator that generates a straight line with the both end portions as bright as the central portion, and a laser line-generator module that integrates the laser line-generator with a laser light source. A columnar transparent medium has an entrance boundary surface 10 for taking in laser light and an exit surface 20 for emitting the taken laser light linearly. At least one of the entrance boundary surface 10 and the exit surface 20 is composed of a curved surface, and a curve forming the curved surface includes two or more inflection points F.
Claims17
A laser line-generator using a columnar transparent medium, the columnar transparent medium having an entrance boundary surface for taking in laser light and an exit surface for emitting the taken laser light linearly in a straight line beam,
- wherein at least one of the entrance boundary surface and the exit surface is composed of a curved surface, and a curve forming the curved surface includes two or more inflection points on the at least one of the entrance boundary surface and the exit surface, and
- wherein the laser light emitted linearly has an orthogonal relation to an optical axis and a column height direction of the columnar transparent medium and has an illuminance distribution that is at least as bright on opposed end portions of the straight line beam as in a central portion of the straight line beam.
A laser line-generator using a columnar transparent medium, the columnar transparent medium having an entrance boundary surface for taking in laser light and an exit surface for emitting the taken laser light linearly in a straight line beam,
- wherein at least one of the entrance boundary surface and the exit surface is composed of a curved surface, and a curve forming the curved surface includes two or more inflection points that exist not on the at least one of the entrance boundary surface and the exit surface but on the curve outside the at least one of the entrance boundary surface and the exit surface, and
- wherein the laser light emitted linearly has an orthogonal relation to an optical axis and a column height direction of the columnar transparent medium and has an illuminance distribution that is at least as bright on opposed end portions of the straight line beam as in a central portion of the straight line beam.
A laser line-generator, comprising:
- a transparent medium columnar in a first direction transverse to an optical axis and having an entrance boundary surface receiving laser light propagating parallel to the optical axis and an exit surface emitting the laser light to form a straight line beam extending along a second direction transverse to the first direction and to the optical axis,
- wherein at least one of the entrance boundary surface and the exit surface is composed of a curved surface following a curve including two or more inflection points and the curved surface cause the straight line beam to have an illuminance distriburtion that is at least as bright on opposed end portions of the straight line beam as in a central portion thereof.
Dependencies are inferred from the claim text.