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    • 3. 发明申请
    • Optical Device, Optical Recording Head and Optical Recording Device
    • 光学设备,光学记录头和光学记录装置
    • US20110134740A1
    • 2011-06-09
    • US13057666
    • 2009-07-13
    • Koujirou SekineHiroaki UedaManami KuisekoNaoki NishidaHiroshi HatanoKou Osawa
    • Koujirou SekineHiroaki UedaManami KuisekoNaoki NishidaHiroshi HatanoKou Osawa
    • G11B7/00G02B27/44
    • G11B5/314G11B2005/0005G11B2005/0021
    • Provided is an optical device configured to makes it possible to enhance use efficiency of light. An optical device is provided with an optical element to deflect incident light and a fixation member on which the optical element is fixed. The optical element includes a reflective surface and a diffraction grating surface that deflects the incident light. The optical element is fixed on the fixation member to restrain displacement in accordance with temperature changes at portions thereof other than the reflective surface and the diffracting grating surface in such a condition that displacement is caused without restraint be temperature changes at the reflective surface and the diffraction grating surface. A change of the incident light in the deflection angle due to an inclination change by the reflective surface and the diffracting grating surface is suppressed by a change in a diffraction angle due to a periodical change in the diffraction grating by the displacement of the diffraction grating surface.
    • 提供了一种配置成可以提高光的使用效率的光学装置。 光学装置设置有用于偏转入射光的光学元件和固定有光学元件的固定构件。 光学元件包括反射表面和使入射光偏转的衍射光栅表面。 光学元件被固定在固定构件上,以便在反射面和衍射光栅表面以外的部分处的温度变化下抑制位移,使得在不受限制地产生位移的情况下,反射表面的温度变化和衍射 光栅表面。 通过衍射光栅表面的位移,由于衍射光栅的周期性变化引起的衍射角的变化来抑制由反射表面和衍射光栅表面的倾斜变化引起的偏转角中入射光的变化 。