公开(公告)号：US4500205A

公开(公告)日：1985-02-19

申请号：US465683

申请日：1983-02-10

申请人： Shinichiro Watanabe

发明人： Shinichiro Watanabe

IPC分类号： G01J3/42 ,  G01N21/27

CPC分类号： G01J3/42 ,  G01N2201/1232

摘要： In a spectrophotometer of double beam type comprising a radiation source, reference and sample cells, a photo detector, and beam path switching means, a current-voltage converting amplifier and a logarithmic amplifier in parallel connection are connected to the photo detector. In measuring the transmittance of a sample material in the sample cell, an output of the detector responding to a sample cell transmitted beam is directly supplied to the logarithmic amplifier without undergoing current-voltage conversion while an output of the detector responding to a reference cell transmitted beam is supplied to the current-voltage converting amplifier without undergoing logarithmic amplification.

摘要翻译： 在包括辐射源，参考和样品池，光电检测器和光束路径切换装置的双光束类型的分光光度计中，并联连接的电流 - 电压转换放大器和对数放大器连接到光电检测器。 在测量样品池中的样品材料的透射率时，响应于样品池透射束的检测器的输出直接提供给对数放大器而不经历电流 - 电压转换，而响应于参考单元的检测器的输出被发送 光束被提供给电流 - 电压转换放大器，而不经历对数放大。