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Apparatus for generating a line-beam from a diode-laser array

A diode laser, line beam technology, applied in the field of radiation beams, can solve problems such as non-uniform irradiation

Active Publication Date: 2019-06-07
COHERENT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While prior art devices can produce a uniform line beam at one location along the transformed beam, they cannot provide uniform illumination along a range of locations

Method used

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  • Apparatus for generating a line-beam from a diode-laser array
  • Apparatus for generating a line-beam from a diode-laser array
  • Apparatus for generating a line-beam from a diode-laser array

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Embodiment Construction

[0030] Turning now to the drawings, wherein like features are represented by like reference numerals. figure 1 A preferred embodiment 10 of the line beam generating device according to the invention is shown schematically. Apparatus 10 includes a diode laser bar 20 and a plurality of optical components, described further below. As shown, diode laser bar 20 has characteristic slow axis "S", fast axis "F" and emission "Z" directions. The diode laser bar 20 has a plurality of diode laser emitters 22 arranged in a linear array, parallel to the direction of the slow axis. The optical components are arranged along an optical axis 24 collinear with the emission direction. The diode laser bar 20 and the optical components are arranged to shape the laser radiation emitted by the diode laser bar to form an elongated line beam 26 in an illumination plane 28 perpendicular to the optical axis 24 .

[0031] The optical components are arranged in sequence along the emitting direction of t...

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PUM

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Abstract

An apparatus for generating a line beam (26) includes a diode laser bar (20), a linear microlens array (34) and a plurality of lenses (30, 32, 36, 38) spaced apart and arranged along an optical axis.The linear microlens array (34) and the lenses (30, 32, 36, 38) shape laser radiation emitted by the diode laser bar (20) to form a uniform line beam (26) in an illumination plane (28). The lenses (30, 32, 36, 38) project a far-field image of the diode laser bar (20) onto an image plane (62) proximate to the illumination plane (28). The diode laser bar (20) is rotated from parallel alignment withthe linear microlens array (34) for providing uniform line beam illumination over a range of locations along the optical axis.

Description

[0001] priority [0002] This application claims priority to U.S. Provisional Patent Application Serial No. 62 / 368,078, filed July 28, 2016, and U.S. Nonprovisional Patent Application No. 15 / 236,774, filed August 15, 2016, the disclosures of which are incorporated by reference in their entirety in this article. technical field [0003] The present invention generally relates to shaping light from a diode laser. In particular it relates to shaping light from an array of diode laser emitters into a radiation beam of uniform elongated cross-section. Background technique [0004] Diode lasers are highly efficient devices for converting electrical power into coherent optical power. Edge emitting diode lasers have a diode laser emitter which is a waveguide resonator grown on a single crystal substrate. Diode laser emitters emit laser radiation via an end face in the emission direction. Diode laser emitters are typically between 500 micrometers (μm) and 2,000 μm long, between 4...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/09G02B19/00H01S5/40
CPCG02B19/0057G02B19/0014H01S5/4012H01S5/4031H01S2301/20G02B27/0961G02B27/0966G02B27/0927G02B27/30H01S5/4025
Inventor 张睿A·卡普拉拉
Owner COHERENT INC