Acta Photonica Sinica, Volume. 52, Issue 5, 0552205(2023)
Development of Astronomical Spectrographs for the 1.2-meter Telescope of Sun Yat-Sen University（Invited）
Figures & Tables(18)
Fig. 5. Overall photograph of long-slit spectrograph and long-slit spectral image
Fig. 11. Commissioning photo of the high-resolution fiber spectrograph spectral image on the detector
Table 1. The main technical indexes of the long-slit spectrograph
View tableView in ArticleTable 1. The main technical indexes of the long-slit spectrograph
Parameters Design indexes Slit Width：1″，2″，3″ can be switched. Length：≥5′ Spectral resolution Width 3″，R=1 000
Width 2″，R=1 500
Width 1″，R=3 000
Waveband coverage Replacing the grisms to cover different bands from 400 to 900 nmThe bandwidth covered by a single exposure ≥70 nm Sampling rate ~3 pixels Efficiency Peak efficiency≥40%
（From the slit to the optical system in front of the detector）
Table 2. Reference parameters of available Grisms in the full band
View tableView in ArticleTable 2. Reference parameters of available Grisms in the full band
Waveband #1 #2 #3 #4 #5 Short wavelength 390 nm 455 nm 535 nm 640 nm 755 nm Long wavelength 460 nm 540 nm 635 nm 760 nm 900 nm Line density 1 260 l/mm 1 065 l/mm 890 l/mm 745 l/mm 625 l/mm
Table 3. The main technical indexes of the high-resolution spectrograph
View tableView in ArticleTable 3. The main technical indexes of the high-resolution spectrograph
Parameters Design indexes Fiber Core diameter Φ62.5 μm（equivalent to 2.7"），Length ~25 m Spectral resolution R≥30 000 Waveband coverage The full band of 400~1 000 nm covered by a single exposure Sampling rate ~3 pixels
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Kai ZHANG, Boqing WANG, Zhongyu YUE, Xinqiqige, Tong ZHOU, Mingda JIANG, Liang WANG, Bo MA, Zhengyang LI. Development of Astronomical Spectrographs for the 1.2-meter Telescope of Sun Yat-Sen University（Invited）[J]. Acta Photonica Sinica, 2023, 52(5): 0552205
Paper Information
Category: Special Issue for Advanced Science and Technology of Astronomical Optics
Received: Dec. 30, 2022
Accepted: Mar. 13, 2023
Published Online: Jul. 19, 2023
The Author Email: Kai ZHANG (kzhang@niaot.ac.cn)
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