It is me!回复于2007/11/08
光电二极管和光电倍增管,这两种我们这都有。。有台荧光的,担不是很清楚里面的检测器,因为它还没有坏过。。。
huihuicheng912回复于2007/11/08
Instrumentation
These spectrometers use photodiode arrays (PDAs) or charge-coupled devices (CCDs) as the detector. The spectral range of these array detectors is typically 200 to 1000 nm. The light source is a continuum source such as a tungsten lamp. All wavelengths pass through the sample. The light is dispersed by a diffraction grating after the sample and the separated wavelengths fall on different pixels of the array detector. The resolution depends on the grating, spectrometer design, and pixel size, and is usually fixed for a given instrument. Besides allowing rapid spectral recording, these instruments are relatively small and robust. Portable spectrometers have been developed that use optical fibers to deliver light to and from a sample.
These instruments use only a single light beam, so a reference spectrum is recorded and stored in memory to produce transmittance or absorbance spectra after recording the sample spectrum.
cxdgrt回复于2007/11/08
还有CCD和PDA,比如便携式的紫外上用到的。
过客回复于2007/11/08
我用过光电二极管和二极管阵列的检测器,一般的紫外都用光电二极管,同一时间只能单波测定,二极管阵列比较特殊,它很全谱同时测量.