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    • 4. 发明申请
    • Electronic camera
    • 电子相机
    • US20050041137A1
    • 2005-02-24
    • US10688922
    • 2003-10-21
    • Akira EzawaKeiji Osawa
    • Akira EzawaKeiji Osawa
    • G03B7/00H04N5/225H04N5/235
    • H04N5/2254
    • By using a focal plane shutter having one set of shutter blades as a shielding member of an image pick-up element, it is possible to miniaturize the shutter compared to a focal plane shutter having two sets of blades. This enables the operation to be simplified, and also saves space. Furthermore, in an electronic camera having this focal plane shutter, because the shooting lens side of the image pick-up element that is disposed in the main camera body can be disposed protruding into the shutter unit, the length of the main camera body in the direction of the optical path of the shooting lens can be reduced, and it is possible to form the main camera body small compared to a conventional main camera body.
    • 通过使用具有一组快门叶片作为图像拾取元件的屏蔽构件的焦平面快门,与具有两组叶片的焦平面快门相比,可以使快门小型化。 这样可以简化操作,并节省空间。 此外,在具有该焦平面快门的电子照相机中,由于设置在主相机主体中的图像拾取元件的拍摄透镜侧可以设置成突出到快门单元中,所以主相机主体的长度在 可以减少拍摄镜头的光路的方向,并且与传统的主相机主体相比,可以使主机相机体形成小。
    • 5. 发明授权
    • Power focus device for a camera
    • 摄像机的电源对焦设备
    • US5678074A
    • 1997-10-14
    • US771882
    • 1996-12-23
    • Ryuichi MoriKeiji Osawa
    • Ryuichi MoriKeiji Osawa
    • G02B7/08G03B3/10G03B13/34G03B17/08
    • G03B17/08
    • A power focus device for a camera provides a user-friendly lever interface allowing efficient camera operation. A lever, located outside a camera cover, is movable in two opposing directions but is biased to remain at a neutral position between two extremes of movement. Moving the lever from the neutral position initiates driving the camera lens to focus in either a first or a second direction according to a direction of a displacement of the lever from the neutral position. A speed of focusing is proportional to an amount of displacement of the lever from the neutral position, thus permitting variable high and low speed focusing in both directions for rapid and accurate close-up and infinity focussing. Incorporating a seal into the device permits use in underwater camera applications.
    • 相机的电源对焦设备提供了一个用户友好的手柄接口,从而实现高效的相机操作。 位于相机盖外部的杠杆可在两个相对的方向上移动,但是被偏置以保持在两个极限运动之间的中间位置。 将杠杆从中立位置移动,根据杠杆从中立位置的位移方向开始驱动相机镜头朝第一或第二方向聚焦。 聚焦速度与杠杆从中立位置的位移量成比例,从而允许双向可变的高速和低速聚焦,以实现快速准确的特写和无限远聚焦。 将密封件装入设备允许在水下摄像机应用中使用。
    • 6. 发明授权
    • Electronic flash control apparatus
    • 电子闪光控制装置
    • US06272292B1
    • 2001-08-07
    • US09469272
    • 1999-12-22
    • Hiroyuki IwasakiKeiji Osawa
    • Hiroyuki IwasakiKeiji Osawa
    • G03B1503
    • G03B15/05G03B7/16
    • 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.
    • 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。
    • 7. 发明授权
    • Focus detection device
    • 对焦检测装置
    • US5875360A
    • 1999-02-23
    • US780327
    • 1997-01-08
    • Keiji Osawa
    • Keiji Osawa
    • G03B13/36G02B7/34G03B13/00G03B15/02
    • G02B7/346
    • 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.
    • 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。
    • 9. 发明授权
    • Optical filter and optical device provided with this optical filter
    • 配有该滤光片的滤光片和光学元件
    • US06778325B2
    • 2004-08-17
    • US10119702
    • 2002-04-11
    • Keiji Osawa
    • Keiji Osawa
    • G02B530
    • G02B27/46G02B5/3083G02B17/0856G02B27/288H04N5/2254
    • 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 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.
    • 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,以实现两个分开的光线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被第二双折射板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的成像平面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,智利硝酸盐等构成。
    • 10. 发明授权
    • Optical filter and optical device provided with this optical filter
    • 配有该滤光片的滤光片和光学元件
    • US06327085B1
    • 2001-12-04
    • US09281324
    • 1999-03-30
    • Keiji OsawaKiyoshige Shibazaki
    • Keiji OsawaKiyoshige Shibazaki
    • G02B530
    • G02B27/46G02B5/3083G02B17/0856G02B27/288H04N5/2254
    • 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 1. 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,
    • 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,以实现两个分开的光线L10和L20。 从第一双折射板1a发射的两个光束L10和L20的振动平面由相位板1转换成圆偏振光。从相位板1c发出的两个光束L10'和L20'分别在空间上分开 沿着垂直于第一方向延伸的第二方向由第二双折射板1d分成两个,以实现四个单独的光线L11,L12,L21和L22,以被引导到成像装置15的成像平面15a。至少第一个 双折射板或第二双折射板由铌酸锂,金红石,智利硝酸盐等构成,