Hyper-Resolution Spatial Heterodyne Spectrometer for Hydroxyl Radical OH

Haiyan Luo; Xuejing Fang; Guangxiao Hu; Hailiang Shi; Wei Xiong

doi:10.3788/AOS201838.0630003

Journals >Acta Optica Sinica >Volume 38 >Issue 6 >Page 0630003 > Article

Acta Optica Sinica
Vol. 38, Issue 6, 0630003 (2018)

Hyper-Resolution Spatial Heterodyne Spectrometer for Hydroxyl Radical OH

Haiyan Luo^1、2, Xuejing Fang^1、2、3, Guangxiao Hu^1、2、3, Hailiang Shi^1、2, and Wei Xiong^1、2、*

Author Affiliations

¹ Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, Anhui 230031, China

² Key Laboratory of Optical Calibration and Characterization, Chinese Academy of Sciences, Hefei, Anhui 230031, China

³ University of Science and Technology of China, Hefei, Anhui 230026, China

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DOI: 10.3788/AOS201838.0630003 Cite this Article Set citation alerts

Haiyan Luo, Xuejing Fang, Guangxiao Hu, Hailiang Shi, Wei Xiong. Hyper-Resolution Spatial Heterodyne Spectrometer for Hydroxyl Radical OH[J]. Acta Optica Sinica, 2018, 38(6): 0630003 Copy Citation Text

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Fig. 1. (a) Schematic of principle of optics in dispersive cross section and (b) schematic of principle of optics in 1-D imaging direction

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Fig. 2. Ray trace of transmission arm in wedge principle section

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Fig. 3. Ray trace of imaging lens

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Fig. 4. (a) Distortion and (b) spot diagram of imaging lens

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Fig. 5. Ray trace of fore cylindrical lens and collimating lens

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Fig. 6. Spatial spot diagram of fore-lens

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Fig. 7. Spatial modulation transfer function of fore-lens

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Fig. 8. Sun observation by hyper-resolution spectrometer for mesospheric OH radical

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Fig. 9. (a) Original interferogram; (b) experimental and simulated spectra; (c) residual of experimental and simulated spectra

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Fig. 10. Enlarged (a) spectra and (b) residual of experimental and simulated spectra

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Parameter	Original value	Corrected value
Littrow wavelength	307 nm	307 nm
Grating	Ruled area: 12.02×15.44 mm²	Ruled area: 12.02×15.44 mm²
	Groove density: 1200 l·mm^-1	Groove density: 1200 l·mm^-1
	Rotation angle: 4.223°	Rotation angle: 3.924°
Air spacer 1	Apex angle: 9.719°	Apex angle: 9.719°
Field-widening wedge	Apex angle: 13.048°	Apex angle: 13.644°
Field-widening wedge	Material: F_SiLiCa	Material: F_SiLiCa
Air spacer 2	Apex angle: 0.895°	Apex angle: 0°
Beam splitter	Size: 35 mm×35 mm×35 mm	Size: 35 mm×35 mm×35 mm
Beam splitter	Material: F_SiLiCa	Material: F_SiLiCa

Table 1. Parameters of spatial heterodyne interference unit

Parameter	Value
Parameter	X in dispersive cross section	Y in 1-D imaging direction
Spectral resolution /nm	0.02
Spectral range (FWHM) /nm	308.2-309.8
Working distance /km	2574
Focal length /mm	380.7
Field of limb view@500 km /(°)	+/-1.00(90 km)	+/-0.78(70 km)
Object height /km	90	2
Image height /mm	13.312(0.013×1024)	0.296(0.013×22.75)
Focal length of cylindrical lens /mm	888	¥
Focal length of collimating lens /mm	445	445
Grating size /mm	15.44	12.02
Magnification of imaging lens	-0.8622∶1
Detector size /mm	13.312(0.013×1024)	10.36(0.013×797)

Table 2. Design specifications of SHS for hydroxyl radical OH

Haiyan Luo, Xuejing Fang, Guangxiao Hu, Hailiang Shi, Wei Xiong. Hyper-Resolution Spatial Heterodyne Spectrometer for Hydroxyl Radical OH[J]. Acta Optica Sinica, 2018, 38(6): 0630003

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