A high-resolution acousto-optical radiospectrometer has been developed and tested at the Tokyo Astronomical Observatory. The instrument consists of a simple optical system, a TeO2 acousto-optical light deflector, and a 256-channel image sensor and provides an effective resolution of about 57 KHz and a bandwidth of 10.4 MHz. The instrument has been in operation since June 1976 in conjunction with the 6-m millimeter-wave telescope at the observatory. The results confirm that the acousto-optical spectrometer with a relatively simple optical system and a TeO2 crystal as a light deflector provides superior performance to its filter-bank equivalents. It is shown that use of this type of spectrometer will cause a great change in the observational methods of millimeter-wave spectral lines through the increase of the number of resolving points and the bandwidth. Key words: Acousto-optical effect; Millimeter-wave astronomy; Radiospectrometer.
Publications of the Astronomical Society of Japan
- Pub Date:
- April 1977