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Title:
LASER IRRADIATION DEVICE, INFORMATION RECORDING DEVICE, AND MACHINING DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/084138
Kind Code:
A1
Abstract:
A laser irradiation device includes a laser light source L, a spatial light modulator SLM for spatially modulating the laser light from the laser light source, and an optical system OP for focusing the laser light onto an irradiation object SM to be irradiated with the laser light. The frame of the spatial light modulator SLM is divided into pixel groups PIXG (S, T), each of which comprises a plurality of pixels that are spatially independent without overlap. The modulation amount set for each pixel group is determined in accordance with a bitmap matrix that is input externally. Each element (BITMAP (S, T)) of the bitmap matrix is set to correspond to each pixel group PIXG (S, T). Thereby, the calculation of a modulation pattern can be simplified to achieve high-speed processing.

Inventors:
WATANABE TAKAO (JP)
IMAI RYO (JP)
SHINTANI TOSHIMICHI (JP)
Application Number:
PCT/JP2014/081137
Publication Date:
June 02, 2016
Filing Date:
November 26, 2014
Export Citation:
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Assignee:
HITACHI LTD (JP)
International Classes:
G02F1/01; B23K26/073; G02B26/08; G11B7/0045; G11B7/135
Foreign References:
JP2006252701A2006-09-21
JP2012256013A2012-12-27
JPH06203407A1994-07-22
JPH0547041A1993-02-26
JPH1124039A1999-01-29
Attorney, Agent or Firm:
INOUE Manabu et al. (JP)
Manabu Inoue (JP)
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