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1. 发明授权

US4190337A Exposure measurement circuit 失效
标题翻译：曝光测量电路
公开(公告)号：US4190337A
公开(公告)日：1980-02-26
申请号：US873623
申请日：1978-01-30
申请人： Siegfried Schutze , Werner Locke
发明人： Siegfried Schutze , Werner Locke
IPC分类号： G03B17/18 , G01J1/44
CPC分类号： G03B17/18
摘要： The exposure metering circuit comprises a differential amplifier, whose inputs are connected to a measuring bridge consisting of a photo-conductive cell and setting controls for the insertion of exposure factors and whose outputs are connected to light-emitting elements for the indication of a set under-exposure, over-exposure or the correct exposure. The two measuring bridge feed points are connected across a resistor, on the one hand, and across a transistor which is driven by means of a voltage derived from the common emitter circuit of the differential amplifier, on the other hand, to an operating voltage source.
摘要翻译：曝光计量电路包括差分放大器，其差分放大器连接到由光电导单元组成的测量桥和用于插入曝光因子的设置控制，其输出连接到发光元件，用于指示一组 - 曝光，过度曝光或正确曝光。另一方面，两个测量桥馈电点一方面连接在电阻器上，另一方面连接到通过从差分放大器的公共发射极电路导出的电压驱动的晶体管，另一方面，工作电压源。

2. 发明授权

US3997904A Camera circuit arrangement for the pre-indication of exposure time 失效
标题翻译：相机电路布置，用于预曝光时间
公开(公告)号：US3997904A
公开(公告)日：1976-12-14
申请号：US578319
申请日：1975-05-16
申请人： Siegfried Schutze , Werner Locke
发明人： Siegfried Schutze , Werner Locke
IPC分类号： G03B7/08 , G03B17/20 , G03B17/18
CPC分类号： G03B17/20 , G03B7/08
摘要： A circuit arrangement for the pre-indication of the exposure time to be expected in automatic mirror-reflex cameras in which the brightness of a controllable luminous element, which is constant for the duration of the exposure, is used for the illumination of the photo-receiver of the electronic time-formation system. The voltage dropping over the luminous element, which is proportional to the exposure time, is ascertained by means of a measuring mechanism. The luminous element is formed as luminous diode and in parallel therewith there is connected a current path containing the measuring mechanism fed from a constant current source for the compensation of the response voltage of the luminous diode and for the adaptation of the measuring mechanism to the characteristics of the luminous diode.
摘要翻译：用于在自动镜面反射照相机中预期曝光时间的预先指示的电路装置，其中在曝光期间恒定的可控发光元件的亮度用于照明照相机的照明，电子计时系统的接收机。通过测量机构确定与曝光时间成比例的落在发光元件上的电压。发光元件形成为发光二极管，与其并联连接有电流路径，其包含从恒定电流源馈送的测量机构，用于补偿发光二极管的响应电压，并将测量机构适应于特性的发光二极管。

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