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High Resolution Image Reconstruction at Yunnan Observatory

  • P. Qiu (a1), Y. Qiu (a1), P. Qian (a1) and Z. Liu (a1)

Extract

The research on the high resolution image reconstruction has been carried out at the Yunnan Observatory, the Chinese Academy of Sciences, since 1983. At the early stage in 1983–1987, our research was concentrated on the Speckle Interferometry[1]. The first developed speckle camera for using the film as the recording medium was made up of an intensifier with a gain of 57,000 and an SB-408-B oscilloscope camera. In May, 1985, 144 speckle interferograms of the binary ζBoo and the unresolved single star 32 Boo apiece were obtained with the speckle camera attached to the 1-M Rcc telescope, and the average power spectrum of ζBoo was then acquired by means of the Optical Fourier Transformation[2]. Soon afterwords, the optical couple of the intensifier to a RCA CCD(320×512 pixels) through a lens was used to replace the film and the oscilloscope camera, thereby making an improvement on the detectability up to 7 m from 4 m . In December, 1986 the improved camera attached to 1-M telescope was used to observe three binary stars, i.e. Kui23, Σ73 and Σ346AB. The speckle interferograms were processed with a computer and angular seperations of these binaries were obtained approximate to the diffraction-limited resolution of the telescope[3].

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Copyright

References

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1. Labeyrie, A., Astron. Astrophys., 6, 85 (1970).
2. Wang, Y., et. al., Publications of Yunnan Obs., 2, 51 (1986).
3. Wang, Y., et. al., Acta Astronomical Sinica, 4, 410 (1987).
4. Weigelt, G., Opt. commun., 21, 55 (1977).
5. Weigelt, G., Wirnitzer, B., Opt. Lett., 8, 389 (1983).
6. Lohmann, A.W., Weigelt, G.P. and Wirnitzer, B., Appl. Opt., 22, 4028 (1983).
7. Bartelt, H., Lohmann, A.W. and Wirnitzer, B., Appl. Opt., 23, 3121 (1984).
8. Qiu, P., Progress in Astronomy, 4, 328 (1989).
9. Qiu, Y., et. al., Publications of Yunnan Obs., 2, 42 (1992).
10. Qiu, Y., et. al., Acta Astronomical Sinica, 3, 280 (1992).

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