| 摘 要： | this paper discusses the frequency resolution of an acousto-opticalspectrometer system under influences of deflector‘s spectral resolution,coherent light-beam truncation ratio,and photodiode array‘s response.Thebroadening of the resoluble line-pattern caused by the response of aphotodiode pixel has been computed.According to this discussion theauthors proposed the selecting principles for the design parameters of theacoustooptical spectrometer including light-beam truncation ratio,focallength of Fourier lens,and number of photodiode array elements,i.e.thequantitative criteria for specific observational necessities with anacousto-optical spectrometer considered with resolution,bandwidth,andsidelobes of instrumental profile comprehensively.An experimentalmeasurement of the frequency resolution to verify the above theoreticalcomputations has also been carried out.
|
