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11. 发明授权

US06650474B2 Optical filter and optical device provided with this optical filter 有权
公开(公告)号：US06650474B2
公开(公告)日：2003-11-18
申请号：US10119935
申请日：2002-04-11
申请人： Keiji Osawa
发明人： Keiji Osawa
IPC分类号： G02B530
CPC分类号： G02B27/46 , G02B5/3083 , G02B17/0856 , G02B27/288 , H04N5/2254
摘要： Light emitted from a taking lens 20 enters a first birefringent plate 1a to be spatially divided along a first direction extending perpendicular to the direction in which the light advances to achieve two separate rays L10 and L20. The vibrational planes of the two light fluxes L10 and L20 emitted from the first birefringent plate 1a are converted to a circularly polarized light by a phase plate 1c. The two light fluxes L10′ and L20′ emitted from the phase plate 1c are each spatially divided into two by a second birefringent plate 1d along a second direction extending perpendicular to the first direction to achieve four separate rays L12, L12, L21 and L22, to be guided to an imaging plane 15a of an imaging device 15. At least either the first birefringent plate or the second birefringent plate is constituted of lithium niobate, rutile, Chilean nitrate, or the like.

12. 发明授权

US06392803B2 Optical filter and optical device provided with this optical filter 有权
标题翻译：配有该滤光片的滤光片和光学元件
公开(公告)号：US06392803B2
公开(公告)日：2002-05-21
申请号：US09772931
申请日：2001-01-31
申请人： Keiji Osawa
发明人： Keiji Osawa
IPC分类号： G02B530
CPC分类号： G02B27/46 , G02B5/3083 , G02B17/0856 , G02B27/288 , H04N5/2254
摘要： Light emitted from a taking lens 20 enters a first birefringent plate la to be spatially divided along a first direction extending perpendicular to the direction in which the light advances to achieve two separate rays L10 and L20. The vibrational planes of the two light fluxes L10 and L20 emitted from the first birefringent plate 1a are converted to a circularly polarized light by a phase plate 1c. The two light fluxes L10′ and L20′ emitted from the phase plate 1c are each spatially divided into two by a second birefringent plate 1d along a second direction extending perpendicular to the first direction to achieve four separate rays L11, L12, L21 and L22, to be guided to an imaging plane 15a of an imaging device 15. At least either the first birefringent plate or the second birefringent plate is constituted of lithium niobate, rutile. Chilean nitrate, or the like.
摘要翻译：从拍摄镜头20发射的光进入第一双折射板1a，沿着垂直于光前进的方向延伸的第一方向进行空间分割，以实现两个单独的光线L10和L20。从第一双折射板1a发射的两个光束L10和L20的振动面通过相位板1c转换为圆偏振光。从相位板1c发射出的两个光束L10'和L20'分别沿垂直于第一方向延伸的第二方向由第二双折射板1d空间分成两个，以实现四个分开的光线L11，L12，L21和L22，被引导到成像装置15的成像面15a.第一双折射板或第二双折射板中的至少一个由铌酸锂，金红石等构成。智利硝酸盐等。

13. 发明授权

US06272292B1 Electronic flash control apparatus 有权
标题翻译：电子闪光控制装置
公开(公告)号：US06272292B1
公开(公告)日：2001-08-07
申请号：US09469272
申请日：1999-12-22
申请人： Hiroyuki Iwasaki , Keiji Osawa
发明人： Hiroyuki Iwasaki , Keiji Osawa
IPC分类号： G03B1503
CPC分类号： G03B15/05 , G03B7/16
摘要： An electronic flash unit is caused to perform a pre-flash immediately before a photographing operation, and the quantity of light reflected by the subject during the pre-flash is measured by a flash metering unit. Based upon the output from the flash metering unit, a decision is made as to whether or not another pre-flash is to be implemented. Based upon the results of the decision-making, another pre-flash is performed if necessary. Thus, if the quantity of light measured by the flash metering unit during the pre-flash is too small or too large and a sufficient degree of accuracy is not achieved in the measurement, another pre-flash is performed to assure a high degree of accuracy in metering.
摘要翻译：使电子闪光灯单元在拍摄操作之前立即进行预闪，并且通过闪光计量单元测量在预闪光期间由被摄体反射的光的量。基于闪光计量单元的输出，决定是否要实现另一个预闪光。根据决策的结果，必要时进行另一预闪。因此，如果在闪光期间由闪光计量单元测量的光量太小或太大并且在测量中没有达到足够的精确度，则执行另一预闪以确保高精确度在计量。

14. 发明授权

US5875360A Focus detection device 失效
标题翻译：对焦检测装置
公开(公告)号：US5875360A
公开(公告)日：1999-02-23
申请号：US780327
申请日：1997-01-08
申请人： Keiji Osawa
发明人： Keiji Osawa
IPC分类号： G03B13/36 , G02B7/34 , G03B13/00 , G03B15/02
CPC分类号： G02B7/346
摘要： A focus detection device that is capable of performing focus detection in several focus detection areas within a photographic image plane using, for example, a phase difference method and that uses an auxiliary illumination light with at least one of the areas also includes infrared light cut filters that block the transmission of light above predetermined wavelengths. In particular, the maximum wavelength of the light transmitted by the infrared cut filter for one of the focus detection areas is different than the maximum wavelength of the light transmitted by the infrared cut filter for another one of the focus detection areas.
摘要翻译：能够使用例如相位差法在摄影图像平面内的多个焦点检测区域中进行焦点检测的焦点检测装置，并且使用具有至少一个区域的辅助照明光的焦点检测装置还包括红外光截止滤光器阻止光超过预定波长的透射。特别地，用于焦点检测区域之一的由红外线截止滤波器透射的光的最大波长与由另一个焦点检测区域的红外线截止滤波器透射的光的最大波长不同。

15. 发明授权

US5498864A Camera focus detection apparatus detecting focus conditions among multiple areas within a photographic scene 失效
标题翻译：相机焦点检测装置检测摄影场景内的多个区域中的对焦条件
公开(公告)号：US5498864A
公开(公告)日：1996-03-12
申请号：US469774
申请日：1995-06-06
申请人： Keiji Osawa
发明人： Keiji Osawa
IPC分类号： G02B7/34 , G02B7/28 , G03B13/36 , G01J1/20 , G03B13/18
CPC分类号： G02B7/346
摘要： A focus detection apparatus that detects focusing conditions among multiple viewing areas within an image plane of a camera in order to guarantee equal focusing precision among the multiple viewing areas. The focus detection apparatus includes an aperture mask, a secondary imaging lens, and a line sensor which are assembled as a sub-unit. Each area of a multitude of viewing areas is provided with such a sub-unit to perform cross-eye adjustments. Finally, each sub-unit is aligned for installation on a main unit that is equipped with a field lens in order to perform pupil exit adjustments independently for each of the aforementioned viewing areas.
摘要翻译：一种聚焦检测装置，其检测相机的图像平面内的多个观看区域之间的聚焦条件，以便保证多个观看区域之间的相等的聚焦精度。焦点检测装置包括作为子单元组装的孔径掩模，次级成像透镜和线传感器。多个观看区域的每个区域设置有这样的子单元以进行交叉眼睛调整。最后，每个子单元被对准以安装在配备有场透镜的主单元上，以便为每个前述观看区域独立地执行光瞳退出调节。

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