Researching | Visible-Infrared Imaging Spectrometer for the Exploration of Asteroids

Journals >Acta Optica Sinica >Volume 40 >Issue 7 >Page 0722002 > Article

Acta Optica Sinica
Vol. 40, Issue 7, 0722002 (2020)

Visible-Infrared Imaging Spectrometer for the Exploration of Asteroids

Fuzhen Yang^1、2, Xinhua Chen^1、2、*, Zhicheng Zhao^1、2, Quan Liu^1、2, and Weimin Shen^1、2

Author Affiliations

¹Key Laboratory of Modern Optical Technologies of Ministry of Education of China, School of Optoelectronic Science and Engineering, Soochow University, Suzhou, Jiangsu 215006, China

²Key Laboratory of Advanced Optical Manufacturing Technologies of Jiangsu Province, School of Optoelectronic Science and Engineering, Soochow University, Suzhou, Jiangsu 215006, China

show less

DOI: 10.3788/AOS202040.0722002 Cite this Article Set citation alerts

Fuzhen Yang, Xinhua Chen, Zhicheng Zhao, Quan Liu, Weimin Shen. Visible-Infrared Imaging Spectrometer for the Exploration of Asteroids[J]. Acta Optica Sinica, 2020, 40(7): 0722002 Copy Citation Text

show less

VNIR-SWIR reflection spectra of Kaolinite, Halloysite and Montmorillonite. (a) Typical spectral curve; (b) local enlarged drawing of the selected area in Fig. 1(a)

Fig. 1. VNIR-SWIR reflection spectra of Kaolinite, Halloysite and Montmorillonite. (a) Typical spectral curve; (b) local enlarged drawing of the selected area in Fig. 1(a)

Download full size

VNIR-SWIR reflection spectra of HEDs. (a) Spectral curve of HEDs from different regions; (b) local enlarged drawing of the selected area in Fig. 2(a)

Fig. 2. VNIR-SWIR reflection spectra of HEDs. (a) Spectral curve of HEDs from different regions; (b) local enlarged drawing of the selected area in Fig. 2(a)

Download full size

$Diagram of the partitioned diffraction gratings$

Fig. 3. Diagram of the partitioned diffraction gratings

Download full size

Fig. 4. Imaging diagram of Rowland circles on meridional image locations

Download full size

Fig. 5. Steps to calculate the initial structure

Download full size

Fig. 6. Optical layout of the designed optical system

Download full size

Fig. 7. Spot diagram of designed optical system

Download full size

Fig. 8. Curve of the smile versus the normalized field of view

Download full size

Fig. 9. Curve of the keystone versus the normalized field of view

Download full size

$Diffraction efficiency of gratings in VNIR band. (a) Diffraction efficiency at different blaze angles; (b) combined diffraction efficiency with different area ratios$

Fig. 10. Diffraction efficiency of gratings in VNIR band. (a) Diffraction efficiency at different blaze angles; (b) combined diffraction efficiency with different area ratios

Download full size

$Diffraction efficiency of gratings in SWIR band$

Fig. 11. Diffraction efficiency of gratings in SWIR band

Download full size

Fig. 12. Partitioned grating and the prototype of the designed optical system. (a) Partitioned grating; (b) prototype of the designed optical system

Download full size

Fig. 13. Photo of the spectrum performance measurement device for the VNIR band

Download full size

Fig. 14. Spectral image and intensity distribution curves in the VNIR band

Download full size

Fig. 15. Photo of the spectrum performance measurement device for the SWIR band

Download full size

Fig. 16. Spectral image and intensity distribution curves at 1900 nm

Download full size

Parameter	VNIR	SWIR
Spectral range /nm	400--1000	1000--2700
Spectral resolution /nm	≤5	≤10
F number	6	3
Pixel size /μm	25
Slit length /mm	10
Smile and keystone /pixel	<10%

Table 1. Main parameters of the system

VNIR				SWIR
Parameter	Value /mm	Parameter	Value /mm	Parameter	Value /mm	Parameter	Value /mm
R₁	-136.3107	1/g	0.0083	R₁	-165.8263	1/g	0.022
R₂	-69.4444	d_CO	33.5520	R₂	-81.1111	d_CO	25.0754
R₃	-133.3195	$d_{C I_{M}}$	27.7187	R₃	-155.7172	$d_{C I_{M}}$	32.3754

Table 2. Initial structural parameters of the system

Field of view /mm	VNIR			SWIR
Field of view /mm	0.4 μm	0.7 μm	1.0 μm	1.0 μm	1.85 μm	2.7 μm
(0,0)	0.93	0.86	0.80	0.77	0.70	0.51
(3.7,0)	0.93	0.87	0.80	0.74	0.70	0.53
(5,0)	0.93	0.87	0.79	0.72	0.70	0.54
(-3.7,0)	0.94	0.87	0.80	0.74	0.70	0.53
(-5,0)	0.93	0.87	0.79	0.72	0.70	0.54

Table 3. MTF at the Nyquist frequency (20 lp/mm)

Wavelength /nm	400	550	700	850	1000
Spectral resolution /nm	3.50	3.75	3.71	3.63	3.54
Smile /pixel	7.57%	7.34%	7.39%	7.33%	7.86%
Max keystone /pixel	3.43%

Table 4. Measurement results of the spectral resolution, smile and keystone in VNIR band

Wavelength /nm	1100	1300	1500	1700	1900
Spectral resolution /nm	9.59	9.61	9.35	9.77	9.89
Smile /pixel	8.6%	7.90%	6.83%	7.33%	8.35%
Maxkeystone /pixel	5.61%

Table 5. Measurement results of the spectral resolution, smile and keystone in SWIR band

Get PDF(in Chinese)

Figures&Tables (21)

References (13)

Copy Citation Text

Fuzhen Yang, Xinhua Chen, Zhicheng Zhao, Quan Liu, Weimin Shen. Visible-Infrared Imaging Spectrometer for the Exploration of Asteroids[J]. Acta Optica Sinica, 2020, 40(7): 0722002

Download Citation

Set citation alerts for the article

Set citation alerts for the article

Save the article for my favorites

Paper Information

Recommended Topics

laser devices and laser physics

Lasers and Laser Optics

laser manufacturing

Instrumentation, Measurement and Metrology

Set citation alerts for the article

Please enter your email address