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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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Patent Agency Ranking
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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公开(公告)号：US3849786A
公开(公告)日：1974-11-19
申请号：US31349872
申请日：1972-12-08
Applicant: MINOLTA CAMERA KK
CPC classification number: G03B7/083
Abstract: This invention relates to a light integrating type light detector circuit, comprising a parallel circuit formed with a photovoltaic cell, an integrating capacitor and a timing switch for starting integration, and a trigger circuit which is triggered when a voltage of the parallel circuit has reached a predetermined level within a range of a voltage charged with a charging current substantially equal to a short-circuit current of the photovoltaic cell, in which an output time characteristic in inverse proportion to the illumination of light received by the photovoltaic cell is obtained.
Abstract translation: 本发明涉及一种光积分型光检测器电路，包括由光伏电池形成的并联电路，积分电容器和用于开始积分的定时开关，以及当并联电路的电压已达到时触发的触发电路 在充电电流的电压范围内的预定电平基本上等于光伏电池的短路电流，其中获得与光伏电池接收的光的照射成反比的输出时间特性。
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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：US3798664A
公开(公告)日：1974-03-19
申请号：US3798664D
申请日：1972-10-06
Applicant: MINOLTA CAMERA KK
Inventor： MATSUDA M
CPC classification number: G03B7/083
Abstract: A shutter control device has two delay circuits and a timing circuit including a photoconductive element for determining a delay period as a function of the intensity of the scene light. The timing circuit and one of the delay circuits are actuated simultaneously with the operation of the shutter release and the other delay circuit is operated when the first actuated delay circuit attains a given potential. The shutter closing is initiated when the potentials of the two delay circuits are equal.
Abstract translation: 快门控制装置具有两个延迟电路和包括光电元件的定时电路，用于根据场景光的强度来确定延迟周期。 当第一致动延迟电路达到给定电位时，定时电路和其中一个延迟电路与快门释放的操作同时致动，另一个延迟电路被操作。 当两个延迟电路的电位相等时，启动快门关闭。
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公开(公告)号：US3734632A
公开(公告)日：1973-05-22
申请号：US3734632D
申请日：1971-10-29
Applicant: MINOLTA CAMERA KK
Inventor： MATSUDA M
CPC classification number: H03F3/08 , Y10S136/291
Abstract: A circuit for detecting current generated by a light transducer such as a photovoltaic cell includes at least one P-N junction for biasing a transistor to compensate for the voltage drop of the base emitter junction thereof and includes feedback between the collector of the transistor and the biasing junction to compensate for temperature changes and changes in the amplification factor of the transistor whereby the linearity of the light transducer output is maintained.
Abstract translation: 用于检测由诸如光伏电池的光换能器产生的电流的电路包括至少一个PN结，用于偏置晶体管以补偿其基极发射极结的电压降，并且包括在晶体管的集电极和偏置接合点之间的反馈 以补偿晶体管的温度变化和放大因子的变化，由此保持光转换器输出的线性。
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