光电倍增管显微镜光度仪的研制和测试

Development and Test of Photomultiplier-Cell Photomicrometer

光电倍增管显微镜光度仪是鉴定和研究矿物(特别是金属矿物)的必备仪器。由于光电倍增管具有高灵敏度及光电流强度与光照度正比关系良好等特点,因此,光电倍增管法是目前精确测定矿物多种光学性质常数的最佳方法。光电倍增管显微镜光度仪在国外有多种商品出售。

The photomultiplier-cell photomicrometer is an essential instrument in appraising and analyzing mineral(especially for metal mineral).Up to the present,the best way to quantitate accurately various optical quality(including reflectivity,transmissivity,reflective transmission and apparent angle of rotation of heterogeneous substance,etc.)is the method of photo-multiplier-cell.In 1978,adopted transistor circuit,the authors had assembled a complete model of instrument connected with Ortholux-Pol BK microscope to constitute the photomultiplier-cell photomicrometer,which was made use of an illuminant voltage-stabilizer,direct current high-voltage stabilizer and photomultiplier-cell direct current operational amplifier.In 1981,a new design was found application.Integrated circuit and digital display had been put to use in the reformed instrument.So it is featured with less in measure limit(the inferior limit is 5 micron),high precision(relative error in measure is below 2%),little volum and easy to handle.