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公开(公告)号：US3777638A
公开(公告)日：1973-12-11
申请号：US3777638D
申请日：1972-10-30
Applicant: MINOLTA CAMERA KK
CPC classification number: G03B7/083
Abstract: In an electrical exposure control device for a single lens reflex camera in which the scene light of objects to be photographed which passes through the objective lens of the single lens reflex camera is received by light receiving elements the output thereof is detected by the compression circuit as a voltage proportional to the value of logarithm of the brightness of said light, said potential is stored in the storage means, the timing circuit is actuated, at the time of exposure, by the current anti-logarithmically converted from the stored voltage, and the activation circuit for terminating the exposure is included; there is disclosed that said device comprises a constant current generating circuit for preventing variation of current resulting from fluctuation of voltage in the power source, said voltage being impressed to the compression circuit; a circuit to which the current generated at the constant current generating circuit is fed, said circuit including photoconductive elements and resistors, and generating a voltage proportional to a value of logarithm of illumination of light receiving surfaces; a compression circuit connected in series to the secondlymentioned circuit and including a bias voltage generating circuit depending upon a set value of film speed and a set value of diaphragm aperture, said compression circuit photographically calculating voltage of both circuits which is developed by output current of said constant current generating circuit and producing output voltage proportional to a value of logarithm of duration of exposure; a storage means for storing output voltage of said compression circuit through a switch prior to exposure; a timing circuit for producing an anti-logarithmically converted current from the stored voltage of said storage means simultaneously with the exposure, the thus produced current being impressed thereto; and an activation circuit being actuated by said timing circuit and terminating the exposure, said device being free from error which may be introduced due to a variation of characteristics of P-N functions in these circuits depending upon a variation of temperature, and part of these circuits being of an integrated circuit.
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公开(公告)号：US3728946A
公开(公告)日：1973-04-24
申请号：US3728946D
申请日：1971-07-06
Applicant: MINOLTA CAMERA KK
Inventor： KURAMOTO Y , TSUJIMOTO K , YATA K , SAHARA M
CPC classification number: G03B7/083
Abstract: Switching mechanism in an exposure control device for a photoconductive camera reduces unnecessary battery consumption by disconnecting the power source from a light measuring circuit and a mechanism for actuating shutter closing during those times when either the output of the light measuring circuit and/or the actuation of the shutter are not required. Manually operative individual switches respectively interconnect the light measuring circuit and the shutter actuation mechanism with the power source. A button switch movable between first and second positions engages with a locking member to prevent actuation of the shutter release button to prevent interconnection of the shutter actuating mechanism with the power source when an exposure time setting member is set to an automatic exposure position and the button switch is in the first position for opening the switch interconnecting the light measuring circuit with the battery source. Rotation of the exposure time setting member to any one of a number of positions rotates the locking member enabling the release button to be depressed and the interconnection of the shutter actuating mechanism with the battery source.
Abstract translation: 用于感光摄像机的曝光控制装置中的切换机构通过在光测量电路的输出和/或致动的光照测量电路的输出期间断开电源和光测量电路以及用于致动快门关闭的机构来减少不必要的电池消耗 不需要快门。 手动操作的各个开关分别将光测量电路和快门致动机构与电源互连。 可在第一位置和第二位置之间移动的按钮开关与锁定构件接合以防止快门释放按钮的致动，以防止当曝光时间设定构件被设置为自动曝光位置时快门致动机构与电源的互连，并且按钮 开关处于用于打开将光测量电路与电池源互连的开关的第一位置。 将曝光时间设定部件旋转到多个位置中的任何一个位置使锁定部件旋转，使得释放按钮被压下并且快门致动机构与电池源的互连。
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公开(公告)号：US3846806A
公开(公告)日：1974-11-05
申请号：US42785873
申请日：1973-12-26
Applicant: MINOLTA CAMERA KK
CPC classification number: G03B15/05 , G03B2215/0514 , G03B2215/0532 , H05B41/32
Abstract: An automatic flash device for use on a photographic camera, which is of a type capable of controlling the flash illumination in response to an incident pulse of reflected light energy originating from the flash illumination. This automatic flash device includes a light sensitive element for sensing the incident pulse of the reflected light energy and then to generate an electrical signal indicative of the amount of the reflected light energy. The light sensitive element is housed in a sensor housing structure separate of a flash housing structure accommodating therein a major portion of the flash circuit.
Abstract translation: 一种用于照相机的自动闪光装置，其是能够响应于源自闪光照明的反射光能量的入射脉冲而控制闪光照明的类型。 该自动闪光装置包括用于感测反射光能的入射脉冲的光敏元件，然后产生指示反射光能量的电信号。 光敏元件容纳在与其中容纳闪光电路的主要部分的闪光灯壳结构分开的传感器外壳结构中。
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4.发明授权Exposure control systems for single reflex cameras having a detachable housing 失效具有可拆卸外壳的单反相机的接触控制系统
公开(公告)号：US3733984A
公开(公告)日：1973-05-22
申请号：US3733984D
申请日：1972-07-03
Applicant: MINOLTA CAMERA KK
Inventor： YATA K
Abstract: In a single lens reflex camera, an exposure control system for a photographic camera is so constructed that a housing having a pentagonal prism therein is attachable to and detachable from the camera body. A detecting circuit for detecting the brightness of an object through the objective lens in an exposure control circuit and a memory circuit are built-in to the housing and a portion of the circuitry thereof is made as an integrated circuit. In the camera body a portion of the switching circuit for controlling the exposure of an electric shutter using the output of the detecting circuit as one input is built-in as an integrated circuit. The mounting of the pentagonal prism housing onto the camera body causes the terminals of the detecting and memory circuit and the terminals of the switching circuit to connect with one another.
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Patent Agency Ranking
公开(公告)号：US3846814A
公开(公告)日：1974-11-05
申请号：US38139373
申请日：1973-07-23
Applicant: MINOLTA CAMERA KK
CPC classification number: G03B7/083
Abstract: A universal circuit module is adaptable for the automatic exposure control of different types of camera shutter mechanisms. The circuit module includes switching means responsive to input signals for supplying output signals for controlling the excitation of a load connected to output terminals of the module and biasing means for biasing semiconductor switch means within the module for actuating the switch means at one-half of the voltage of a power source.
Abstract translation: 通用电路模块适用于不同类型的相机快门机构的自动曝光控制。 电路模块包括响应于输入信号的开关装置，用于提供用于控制连接到模块的输出端子的负载的激励的输出信号，以及用于偏置模块内的半导体开关装置的偏置装置，用于在半导体装置 电源电压。
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公开(公告)号：US3783758A
公开(公告)日：1974-01-08
申请号：US3783758D
申请日：1971-12-06
Applicant: MINOLTA CAMERA KK
Inventor： TSUJIMOTO K , YATA K , MATSUDA M
CPC classification number: G03B7/09976
Abstract: A photometric device for generating an electric signal related to coincident light intensity comprises a number of photoresponsive means each including first and second photoconductive elements having response characteristics such that the logarithm of resistance to the logarithm of light intensity are respectively proportional over different ranges of light intensity. Additionally, the first photoconductive element in each of the photoresponsive means has a higher sensitivity than that of the second photoconductive element. The first and second photoconductive elements are positioned to receive light for different areas of the objective field. The first and second photoconductive element of each photoresponsive means are specifically interconnected with similar elements of another photoresponsive means to enhance the light response characteristics.
Abstract translation: 用于产生与重合光强有关的电信号的光度测量装置包括多个光响应装置，每个光响应装置包括具有响应特性的第一和第二光电导元件，使得光强对数的电阻对数分别在不同的光强度范围内成比例 。 另外，每个光响应装置中的第一光电导元件具有比第二光电导元件更高的灵敏度。 第一和第二光电导元件被定位成为目标场的不同区域接收光。 每个光响应装置的第一和第二光电导元件与另一光响应装置的类似元件具体互连，以增强光响应特性。
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公开(公告)号：US3836262A
公开(公告)日：1974-09-17
申请号：US26761572
申请日：1972-06-29
Applicant: MINOLTA CAMERA KK
Abstract: Apparatus is disclosed for measuring and providing an indication of illumination, comprising a delay circuit including a lightreceiving element and a capacitor, for integrating the quantity of light in accordance with illumination incident on the lightreceiving surface of the light-receiving element; a switching circuit actuated by an output signal from the delay circuit; a pulse generator circuit generating pulses of a constant frequency; and a counter circuit comprising a plurality of binary counter circuits disposed in cascade connection, in which the counter circuit is provided with counting elements corresponding to all digits and indicating luminescent diodes connected to output terminals of the counting elements. The counter circuit initiates the counting of the pulses derived from the pulse generator circuit in accordance with illumination incident on the light-receiving surface of the light-receiving element, and the delaying operation of the delay circuit. The counting circuit counts the number of the pulses in a period of time until the switching circuit is actuated, thereby providing a digital indication of a set analog value.
Abstract translation: 公开了用于测量和提供照明指示的装置，包括：包括光接收元件和电容器的延迟电路，用于根据入射在光接收元件的光接收表面上的光照积分光量; 由延迟电路的输出信号驱动的开关电路; 产生恒定频率的脉冲的脉冲发生器电路; 以及包括以级联方式设置的多个二进制计数器电路的计数器电路，其中计数器电路设置有对应于所有数字的计数元件，并且指示连接到计数元件的输出端子的发光二极管。 计数器电路根据入射在光接收元件的受光面上的照明和延迟电路的延迟动作，对从脉冲发生器电路得到的脉冲进行计数。 计数电路对直到开关电路启动的一段时间内的脉冲数进行计数，从而提供设定的模拟值的数字指示。
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公开(公告)号：US3779142A
公开(公告)日：1973-12-18
申请号：US3779142D
申请日：1973-01-29
Applicant: MINOLTA CAMERA KK
CPC classification number: G03B15/05 , G03B7/16 , G03B2215/0514 , G03B2215/056
Abstract: An automatic electronic flash device which automatically terminates the flash illumination when a predetermined quantity of light is received from the subject being photographed. A photocell receives the light from the subject and produces a signal which is subsequently logarithmically integrated. The logarithmically integrated signal is compared with a reference signal representative of any selected one of f/stops of the camera lens aperture adjusting scale and a quench tube connected in parallel to the flash tube is fired when the integrated signal reaches the level of the reference signal. To this end, there is also provided a linkage system for connecting the lens aperture adjusting scale to a variable resistor for varying the level of the reference signal.
Abstract translation: 一种自动电子闪光装置，当从被拍摄对象接收到预定量的光时，自动终止闪光照明。 光电管接收来自被摄体的光，并产生随后对数地整合的信号。 将对数积分信号与表示相机镜头孔径调节标尺的f /停止点中的任何一个的参考信号进行比较，并且当积分信号达到参考信号的电平时，将闪光管并联连接的骤冷管点燃 。 为此，还提供了用于将透镜孔径调节标尺连接到可变电阻器以用于改变参考信号电平的联动系统。
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公开(公告)号：US3721166A
公开(公告)日：1973-03-20
申请号：US3721166D
申请日：1970-11-13
Applicant: MINOLTA CAMERA KK
Abstract: Circuitry is provided for determining the time delay for release of a shutter curtain from a cocked position to compensate for exposure errors generated by the overlapping of first and second shutter curtains in their cocked positions. The non-uniformity between different shutter mechanisms is corrected by adjustment of a variable resistance. A switching circuit responsive to a voltage related to the brightness of an object as well as the required compensation releases the second curtain to terminate the exposure.
Abstract translation: 提供电路，用于确定用于从快门位置释放快门帘幕的时间延迟，以补偿由第一和第二快门帘帘片在其翘起位置中的重叠而产生的曝光误差。 通过调整可变电阻来校正不同快门机构之间的不均匀性。 响应于与物体的亮度相关的电压的开关电路以及所需的补偿释放第二帘以终止曝光。
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