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    • 13. 发明授权
    • TTL automatic flash control camera
    • TTL自动闪光控制
    • EP0469322B1
    • 1996-04-10
    • EP91111057.5
    • 1991-07-03
    • NIKON CORPORATION
    • Yasukawa, Seiichi
    • G03B7/16
    • G03B15/05G03B7/09974G03B7/09979G03B7/16
    • A TTL automatic flash control camera (81) capable of effecting TTL multi-flash control comprises a built-in flash apparatus (89) capable of effecting preliminary flashing, a photoelectric converter (91) for detecting the reflected light distribution information of the area of the object field divided into a plurality of areas by the preliminary flashing of the built-in flash apparatus (89), a determining device for determining the degree of weighting to the divided areas by the reflected light distribution information, a connecting portion capable of mounting a flash-controllable accessory flash apparatus (101), and a flash control device for causing the built-in flash apparatus (89) to effect the preliminary flashing, and causing the accessory flash apparatus (101) being mounted to effect main flashing after the photoelectric converter (91) detects the reflected light distribution information, and effecting the control of the quantity of emitted light during the main flashing by the use of the degree of weighting determined by the determining device.
    • 14. 发明公开
    • Automatic flash limiting apparatus in a camera
    • 摄像机中的自动闪光限制装置
    • EP0464602A3
    • 1992-07-08
    • EP91110481.8
    • 1991-06-25
    • NIKON CORPORATION
    • Takagi, TadaoYokonuma, Norikazu
    • G03B7/16G03B7/099
    • G03B7/17G03B7/08G03B7/09974G03B7/09976G03B7/09979G03B7/16
    • The apparatus of the present invention is provided with flashing means (11) for effecting preliminary flashing and main flashing, split photometry means (13) for metering reflected light from the area of the object field divided into a plurality of areas and putting out a photometric output for each of these areas, preliminary flashing control means, calculation means and main flashing control means. The preliminary flashing control means causes the flashing means to effect preliminary flashing prior to main flashing, and when in that case, at least one of the photometric outputs from the split photometry means reaches a predetermined value, causes the flashing means to repeat the preliminary flashing while decreasing the quantity of emitted light thereof, and when the photometric outputs become null before the predetermined value is reached, causes the flashing means to stop the preliminary flashing. The calculation means determines the divided areas which are not used for the flash limiting during the main flashing by the use of the photometric outputs and the quantity of emitted light during preliminary flashing at the last stage. The main flashing control means controls the main flashing of the flashing means on the basis of the output of the calculation means.
    • 15. 发明公开
    • TTL multiple flash control device
    • TTL Mehrfachblitzsteuervorrichtung。
    • EP0483761A2
    • 1992-05-06
    • EP91118429.9
    • 1991-10-29
    • NIKON CORPORATION
    • Matsui, AkihiroYasukawa, Seiichi
    • G03B7/16G03B7/08
    • G03B15/05G03B7/09974G03B7/09979G03B7/16
    • A device is used to control flashing of a camera (1) having an electronic flash (101) for performing main flashing for photography and preliminary flashing for obtaining information used to limit the quantity of light for the main flashing in accordance with a TTL scheme. The device includes a plurality of photoelectric converting means for receiving light beams corresponding to a plurality of photometric areas (PD11-PD51) constituting a field of view during the preliminary flashing and main flashing, converting the light beams into photocurrents, respectively, and outputting electric signals corresponding to the photocurrents, respectively, and a logarithmic transforming means for logarithmically transforming outputs from the plurality of photoelectric converting means. A peak holding means detects outputs from the logarithmic transforming means which correspond to maximum values of the outputs from the plurality of photoelectric converting means and holds the outputs from the logarithmic transforming means. A field reflection distribution is obtained on the basis of outputs from the peak holding means, and weighting coefficients of the photometric areas during the main flashing are determined on the basis of the field reflection distribution. The outputs from the plurality of photoelectric converting means are weighted in accordance with the weighting coefficients determined by an arithmetic means, the weighted outputs are added, and the quantity of light during the main flashing is limited on the basis of the obtained sum.
    • 一种装置用于控制具有电子闪光灯(101)的照相机(1)的闪烁,用于执行用于摄影的主闪光和预闪,用于根据TTL方案获得用于限制用于主闪光的光量的信息。 该装置包括多个光电转换装置,用于接收与预备闪光和主闪光期间构成视场的多个测光区域(PD11-PD51)对应的光束,分别将光束转换为光电流,并输出电 分别对应于光电流的信号和用于对数变换来自多个光电转换装置的输出的对数变换装置。 峰值保持装置检测来自对数变换装置的输出,其对应于来自多个光电转换装置的输出的最大值,并保持来自对数变换装置的输出。 基于来自峰值保持装置的输出获得场反射分布,并且基于场反射分布来确定主闪光期间的测光区域的加权系数。 根据由算术装置确定的加权系数,对多个光电转换装置的输出进行加权,加权的输出相加,并且基于获得的和来限制主闪光期间的光量。
    • 18. 发明公开
    • Camera with automatic light adjusting device
    • Kamera mit einer automatischen Belichtungssteuerungseinrichtung。
    • EP0512508A1
    • 1992-11-11
    • EP92107642.8
    • 1992-05-06
    • NIKON CORPORATION
    • Takagi, Tadao
    • G03B15/05G03B7/00
    • G03B7/17G03B7/08G03B7/09974G03B7/09979G03B7/16
    • A camera provided with an automatic light adjusting device comprises a flash apparatus for performing a preliminary flash before a main flash, a light metering device for at least metering a light which is emitted from the flash apparatus and reflected by a photographic field, a light metered value correcting device for correcting a light metered value upon the preliminary flash by eliminating a component of stationary light excluding the light emitted from the flash apparatus and reflected by the photographic field, from the light metered value upon the preliminary flash which is metered by the light metering device, and a light adjusting device for adjusting the main flash of the flash apparatus based on the light metered value corrected by the light metered value correcting device.
    • 配备有自动调光装置的相机包括用于在主闪光之前执行预闪的闪光装置,用于至少计量从闪光装置发射并由照相场反射的光的计量装置,计量的光 数值校正装置,用于通过从由闪光装置发射的并且由照相场反射的光除去在由闪光计量的预备闪光时的光计量中除了固定光的分量以校正初步闪光时的光计量 计量装置和调光装置,用于基于由光计量值校正装置校正的光计量值来调节闪光装置的主闪光。
    • 20. 发明公开
    • TTL multiple flash control device
    • TTL多功能闪存控制器件
    • EP0483761A3
    • 1992-07-22
    • EP91118429.9
    • 1991-10-29
    • NIKON CORPORATION
    • Matsui, AkihiroYasukawa, Seiichi
    • G03B7/16G03B7/08
    • G03B15/05G03B7/09974G03B7/09979G03B7/16
    • A device is used to control flashing of a camera (1) having an electronic flash (101) for performing main flashing for photography and preliminary flashing for obtaining information used to limit the quantity of light for the main flashing in accordance with a TTL scheme. The device includes a plurality of photoelectric converting means for receiving light beams corresponding to a plurality of photometric areas (PD11-PD51) constituting a field of view during the preliminary flashing and main flashing, converting the light beams into photocurrents, respectively, and outputting electric signals corresponding to the photocurrents, respectively, and a logarithmic transforming means for logarithmically transforming outputs from the plurality of photoelectric converting means. A peak holding means detects outputs from the logarithmic transforming means which correspond to maximum values of the outputs from the plurality of photoelectric converting means and holds the outputs from the logarithmic transforming means. A field reflection distribution is obtained on the basis of outputs from the peak holding means, and weighting coefficients of the photometric areas during the main flashing are determined on the basis of the field reflection distribution. The outputs from the plurality of photoelectric converting means are weighted in accordance with the weighting coefficients determined by an arithmetic means, the weighted outputs are added, and the quantity of light during the main flashing is limited on the basis of the obtained sum.