【摘要】 针对光照度小于10lx的弱光使用环境,提出并设计了一种批量光电二极管弱光光敏特性测试仪。仪器包括可调弱光光源、照度均匀化装置、批量光电二极管固定板、多通道转换开关、微电流放大电路、环境照度监测通道、数据采集及微机接口电路和相关配套软件。仪器的核心为自行研制的光照度在0.01-10lx范围内无级可调的弱光光源。实际应用中,在2lx照度下,光电二极管弱光光电流一般为12.2-15.6nA,只有少数光电流低于10nA;因此,该仪器可用来进行光电二极管的定量筛选。更多还原

【Abstract】 An instrument is developed for batch measurement of photosensitive parameters of photodiodes under dim light with illuminance less than 10 lx. The instrument consists of a tunable dim light source, a device for uniform illuminance, a batch photodiode clamp board, a multi-channel switch, a weak current amplifying circuit, a monitoring channel of environmental illuminance, the data acquisition and computer interface circuit and related software. The critical part of instrument is the tunable dim light source, by which the illuminance can be tuned over the range 0.01-10 lx continuously. In the application, the photocurrents of photodiodes are usually between 12.2-15.6nA and only a few are less than 10nA when illuminance of dim light is 2 lx, which facilitates the sorting of photodiodes.更多还原