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- W2856388670 abstract "The design and performance of a three-channel image and long-slit spectrograph for the new 4-m telescope in China are described. The direct imaging covers a 3 arcmin by 3 arcmin field of view and a large wavelength range 370-1,600 nm, it has two optical channels and one near infrared channel with different filters. The spectrograph with a long slit is to provide two observing modes including the following spectral resolutions: R1000 and R5000. For dispersing optical elements it use volume-phased holographic grisms (VPHG) at each of the spectroscopic modes to simplify the camera system. The low resolution mode (R1000) is provided by consecutive observations with the spectral ranges: 360-860 nm, however it adopts only one VPHG for the first light. The spectral range of medium resolution mode (R5000) is 460- 750nm, it is constrained with the use of a 4k × 4k CCD detector of 15 μm pixel size. Peak efficient in the spectrograph are achieved to be higher than 50% in different resolution mode." @default.
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- W2856388670 date "2018-07-06" @default.
- W2856388670 modified "2023-10-18" @default.
- W2856388670 title "Optical design of imaging and spectrograph for 4m telescope in China" @default.
- W2856388670 doi "https://doi.org/10.1117/12.2309911" @default.
- W2856388670 hasPublicationYear "2018" @default.
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