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    • 8. 发明专利
    • Imaging apparatus
    • 成像设备
    • JP2009044221A
    • 2009-02-26
    • JP2007204098
    • 2007-08-06
    • Nikon Corp株式会社ニコン
    • MURAMATSU MASARU
    • H04N5/243G06T5/00H04N1/407H04N101/00
    • H04N5/243G03B7/09976G03B7/09979G03B7/28
    • PROBLEM TO BE SOLVED: To perform the most suitable exposure control according with correction of dark gradation. SOLUTION: An imaging apparatus includes: a photometric part for photometry of a subject; an exposure calculation part for setting an exposure condition on the basis of the photometry result of the photometric part; an imaging part for imaging the subject in accordance with the exposure condition to generate image data; a selection part for selecting one of a first photographing mode of not correcting the gray gradation of the image data and a second photographing mode of correcting the dark gradation of image data; and a correction part for performing correction to enhance the brightness of the dark gradation of the image data generated by the imaging part in response to selection of the second photographing mode. The exposure calculation part calculates at least one of a maximum value of luminance, an average value of luminance, and a representative luminance value corresponding to the center part of the subject on the basis of the output of the photometric part and performs weighted addition of the calculation result to calculate an luminance value for exposure control as an exposure condition and calculates a correction value by weighted addition of the calculation result in response to selection of the second photographing mode and corrects the luminance value for exposure control on the basis of the correction value. COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:根据暗灰度的校正执行最合适的曝光控制。 解决方案:成像装置包括:用于对象的测光的测光部分; 曝光计算部,其基于所述测光部的测光结果设定曝光条件; 成像部件,用于根据曝光条件对被摄体成像以产生图像数据; 用于选择不校正图像数据的灰度等级的第一拍摄模式中的一个的选择部分和校正图像数据的暗灰度的第二拍摄模式; 以及校正部分,用于响应于选择第二拍摄模式,执行校正以增强由成像部分生成的图像数据的暗灰度的亮度。 曝光计算部根据测光部的输出,计算亮度的最大值,亮度的平均值和与被摄体的中心部对应的代表亮度值中的至少一个,并进行加权相加 计算结果以计算用于曝光控制的亮度值作为曝光条件,并且通过响应于第二拍摄模式的选择对计算结果进行加权相加来计算校正值,并且基于校正值来校正用于曝光控制的亮度值 。 版权所有(C)2009,JPO&INPIT
    • 9. 发明专利
    • Photometric device and camera
    • 光学设备和摄像机
    • JP2008122535A
    • 2008-05-29
    • JP2006304411
    • 2006-11-09
    • Canon Incキヤノン株式会社
    • YAMAZAKI AKIRA
    • G02B7/28G02B7/34G03B7/099G03B7/0997G03B13/36
    • G03B13/36G03B7/09972G03B7/09976
    • PROBLEM TO BE SOLVED: To more exactly measure the spectroscopic state of a subject even when luminance is low and also to achieve accurate focus detection. SOLUTION: The photometric device is equipped with: a diffusion optical member 105 arranged in the optical path of a photographic lens and having a diffusion surface; a light receiving device 110 receiving diffused light passing through the diffusion surface, and equipped with a first light receiving part and a second light receiving part whose receivable light energy is smaller than that by the first light receiving part. The first light receiving part and the second light receiving part are arranged so that parallax to the optical axis of the photographic lens may be smaller in the second light receiving part than the first light receiving part. COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:即使在亮度低时也能更准确地测量被摄体的分光状态,并且还能够实现准确的焦点检测。 解决方案:测光装置配备有:布置在摄影透镜的光路中并具有扩散表面的漫射光学构件105; 光接收装置110,其接收通过漫射面的漫射光,并且配备有第一光接收部和可接收的光能小于第一光接收部的受光部的第二受光部。 第一光接收部分和第二光接收部分被布置成使得第二光接收部分中的摄影透镜的光轴的视差可以比第一光接收部分小。 版权所有(C)2008,JPO&INPIT
    • 10. 发明专利
    • Optical separator
    • 光学分离器
    • JPS5727222A
    • 1982-02-13
    • JP10190980
    • 1980-07-25
    • Canon Inc
    • ENDOU KIYONOBUNOSE TETSUSHI
    • G02B27/10G03B7/099
    • G02B27/108G02B27/1006G02B27/1086G03B7/09976G03B2217/005
    • PURPOSE:To decrease a harmful diffracted light beam, by constituting an optical separator using a relief type diffraction grid, so that a refractive index difference of two transparent mediums, whose boundary is a reflection surface of said optical separator, is made to approach zero. CONSTITUTION:A refractive index difference between an optical transparent body 1 which has been obtained by engraving a relief type diffraction grid on the surface and vapor-depositing a reflection film 5 on said grid, and a binder 2 for embedding said relief part is made DELTAn, and the concave and convex extent of the grid part is made (h). In the figure, when an incident luminous flux 6 passes through an optical separator 4, unless the refractive index difference DELTAn which has been defined above is ''0'', a lot of diffracted light beams 14 as well as a ''0''-degree transmission light beam 9 are generated, and an image blurs by images A', A'', etc. In order to prevent said phenomenon, a diffraction efficiency of the diffracted light beam is set so that it is suppressed to the extent of being negligible to eyes (about 6%) or below, that is to say, to the extent of DELTAnh
    • 目的:为了减少有害的衍射光束,通过构成使用浮雕型衍射光栅的光学分离器,使得其边界是所述光学分离器的反射面的两个透明介质的折射率差接近零。 构成:通过在表面上雕刻浮雕型衍射栅格并在所述栅格上气相沉积反射膜5获得的光学透明体1与用于嵌入所述浮雕部分的粘合剂2之间的折射率差为DELTAn ,并且制成网格部分的凹凸度(h)。 在该图中,当入射光束6通过光学分离器4时,除非上述定义的折射率差DELTAn为“0”,否则大量衍射光束14以及“0” 产生“-degree透射光束9”,并且图像由图像A',A“等模糊。为了防止所述现象,设置衍射光束的衍射效率,使其被抑制到 对于眼睛(约6%)或以下可忽略不计,也就是说,在DELTAnh <= - 0.095mum的程度上。