首页 / 专利库 / 摄影 / 测光表 / Electrical light-measuring systems

Electrical light-measuring systems

阅读:32发布:2021-11-16

专利汇可以提供Electrical light-measuring systems专利检索,专利查询,专利分析的服务。并且An electrical light-measuring system capable of effectively measuring even relatively small amounts of light. A meter circuit is provided with an indicating meter which indicates the light intensity. This meter circuit is electrically connected with a current-amplifier circuit which controls the current of the meter circuit. This current-amplifier circuit has an input, and a constant-voltage circuit has an output, a photosensitive element being connected between the latter output and input for receiving the light which is to be measured. The meter circuit is capable of being adjusted for adjusting the relationship between the current which flows through the meter and the resistance of the photosensitive element.,下面是Electrical light-measuring systems专利的具体信息内容。

1. In an electrical light-measuring system, meter circuit means including an indicating meter for indicating light intensity, current-amplifier circuit means electrically connected with said meter circuit means for controlling the current thereof, said current-amplifier circuit means having an input, constant voltage circuit means having an output, and photosensitive means for receiving the light which is to be measured, said photosensitive means being electrically connected between said output and input, said meter circuit including a series variable resistor connected in series with said indicating meter for varying the slope of the relationship between the resistance of said photosensitive means and the current which flows through said indicating meter, and a parallel variable resistor connected across the series connected series variable resistor and indicating meter in parallel therewith for changing the range of said relationship, said current-amplifier circuit means including a transistor having a base connected to said photosensitive means and an emitter connected in series with said series variable resistor and indicating meter.
1. In an electrical light-measuring system, meter circuit means including an indicating meter for indicating light intensity, current-amplifier circuit means electrically connected with said meter circuit means for controlling the current thereof, said current-amplifier circuit means having an input, constant voltage circuit means having an output, and photosensitive means for receiving the light which is to be measured, said photosensitive means being electrically connected between said output and input, said meter circuit including a series variable resistor connected in series with said indicating meter for varying the slope of the relationship between the resistance of said photosensitive means and the current which flows through said indicating meter, and a parallel variable resistor connected across the series connected series variable resistor and indicating meter in parallel therewith for changing the range of said relationship, said current-amplifier circuit means including a transistor having a base connected to said photosensitive means and an emitter connected in series with said series variable resistor and indicating meter.
2. The combination of claim 1 and wherein said constant voltage circuit means includes a constant voltage element and a voltage divider resistance connected in series and having therebetween a junction which forms said output connected to said photosensitive means.
说明书全文
高效检索全球专利

专利汇是专利免费检索,专利查询,专利分析-国家发明专利查询检索分析平台,是提供专利分析,专利查询,专利检索等数据服务功能的知识产权数据服务商。

我们的产品包含105个国家的1.26亿组数据,免费查、免费专利分析。

申请试用

分析报告

专利汇分析报告产品可以对行业情报数据进行梳理分析,涉及维度包括行业专利基本状况分析、地域分析、技术分析、发明人分析、申请人分析、专利权人分析、失效分析、核心专利分析、法律分析、研发重点分析、企业专利处境分析、技术处境分析、专利寿命分析、企业定位分析、引证分析等超过60个分析角度,系统通过AI智能系统对图表进行解读,只需1分钟,一键生成行业专利分析报告。

申请试用

QQ群二维码
意见反馈