Invention Grant
- Patent Title: Diffraction optical element, spectral colorimetric apparatus, and image forming apparatus
- Patent Title (中): 衍射光学元件，光谱比色仪和图像形成装置
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Application No.: US12822668Application Date: 2010-06-24
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Publication No.: US08451443B2Publication Date: 2013-05-28
- Inventor: Tokuji Takizawa , Kazumi Kimura
- Applicant: Tokuji Takizawa , Kazumi Kimura
- Applicant Address: JP
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP
- Agency: Rossi, Kimms & McDowell LLP
- Priority: JP2009-176446 20090729
- Main IPC: G01J3/28
- IPC: G01J3/28 ; G02B5/18 ; G02B27/44
Abstract:
A concave reflection type diffraction optical element used for a Rowland type spectrometer, in which: the Rowland type spectrometer detects wavelengths in a range including a wavelength λ1 or more and a wavelength λ2 or less (λ1 r, where R indicates a meridional line curvature radius of the reference surface and r indicates a sagittal line curvature radius thereof.
Public/Granted literature
- US20110026022A1 SPECTRAL OPTICAL ELEMENT, SPECTRAL COLORIMETRIC APPARATUS, AND IMAGE FORMING APPARATUS USING THE SAME Public/Granted day:2011-02-03
Information query
