Structure Analysis and Experiment of an Offner-Type Short-Wave Infrared Imaging Spectrometer

Table 1. 0 Absorption position at different temperaturesnm
View table
Table 1. 0 Absorption position at different temperaturesnm
Peak Temperature Mean Extremedifference
5 ℃ 10 ℃ 15 ℃ 20 ℃ 25 ℃ 30 ℃ 35 ℃
A 1414.50 1413.65 1414.30 1415.47 1416.71 1417.81 1417.44 1415.69 2.11
B 2202.45 2202.31 2203.10 2204.06 2200.41 2200.03 2199.91 2201.75 2.30

Table 1. Index parameters of imaging spectrometer

View table

Table 1. Index parameters of imaging spectrometer

Parameter	Value
Wavelength range /nm	1000-2500
Focal length /mm	130
F-number	2.2
Dispersion /(nm·pixel^-1)	7.5
Slit dimension /mm	Height: 12, width: 0.025
Detector array size /pixel	320×256
Detector pixel size /μm²	30×30

Table 1. 1 Spectral bandwidth value under different temperaturenm
View table
Table 1. 1 Spectral bandwidth value under different temperaturenm
Temperature Mean Extremedifference
5 ℃ 10 ℃ 15 ℃ 20 ℃ 25 ℃ 30 ℃ 35 ℃
38.7 36.12 35.57 39.54 43.83 42.88 45.2 40.26 4.93

Table 2. Material property sheet for imaging spectrometer
View table
Table 2. Material property sheet for imaging spectrometer
Material Density (g·cm^-3) Modulus ofelasticity /GPa Poisson's ratio Coefficient of thermalexpansion /(10^-6 K^-1)
6061 aluminum 2.70 70 0.33 21.7
45 steel 7.85 202 0.30 10.6
K9 glass 2.51 55 0.21 7.1

Table 3. Shape errors and rigid displacement with 4 g acceleration load

View table

Table 3. Shape errors and rigid displacement with 4 g acceleration load

Direction	Parameter	Mirror	Grating	Image plane	Collimating mirror
X	R_MS /nm	0.53	0.20	0.52	0.04
	P_V /nm	12.89	1.69	2.25	1.57
	Rigid angular displacement /(″)Rigid line displacement /μm	5.183.64	5.253.51	5.193.95	5.243.46
Y	R_MS /nm	0.010	0.040	0.050	0.004
	P_V /mm	1.53	0.63	3.11	2.12
	Rigid angular displacement /(″)Rigid line displacement /μm	2.952.10	2.832.10	3.132.29	2.792.08
Z	R_MS /nm	0.14	0.05	0.20	0.01
	P_V /mm	5.40	1.03	0.53	0.15
	Rigid angular displacement /(″)Rigid line displacement /μm	0.590.52	0.730.59	0.820.83	0.830.66

Table 4. Relative displacement between mirrors on X-direction 4 g acceleration load (angular displacement/line displacement)

View table

Table 4. Relative displacement between mirrors on X-direction 4 g acceleration load (angular displacement/line displacement)

Component	Mirror	Grating	Imageplane	Collimatingmirror
Mirror	—	0.07″/1.16 μm	0.57″/0.32 μm	0.19″/0.23 μm
Grating	0.07″/1.16 μm	-	0.33″/0.46 μm	0.10″/0.05 μm
Image plane	0.57″/0.32 μm	0.33″/0.46 μm	-	0.41″/0.49 μm
Collimatingmirror	0.19″/0.23 μm	0.10″/0.05 μm	0.41″/0.49 μm	-

Table 5. Relative displacement between mirrors on Y-direction 4 g acceleration load (angular displacement/line displacement)

View table

Table 5. Relative displacement between mirrors on Y-direction 4 g acceleration load (angular displacement/line displacement)

Component	Mirror	Grating	Imageplane	Collimatingmirror
Mirror	-	0.12″/0.03 μm	0.34″/0.24 μm	0.16″/0.04 μm
Grating	0.12″/0.03 μm	-	0.38″/0.25 μm	0.08″/0.03 μm
Image plane	0.34″/0.24 μm	0.38″/0.25 μm	-	0.45″/0.28 μm
Collimatingmirror	0.16″/0.04 μm	0.08″/0.03 μm	0.45″/0.28 μm	-

Table 6. Relative displacement between mirrors on Z-direction 4 g acceleration load (angular displacement/line displacement)

View table

Table 6. Relative displacement between mirrors on Z-direction 4 g acceleration load (angular displacement/line displacement)

Component	Mirror	Grating	Imageplane	Collimatingmirror
Mirror	-	0.29″/0.19 μm	0.34″/0.33 μm	0.31″/0.20 μm
Grating	0.29″/0.19 μm	-	0.51″/0.33 μm	0.27″/0.10 μm
Image plane	0.34″/0.33 μm	0.51″/0.33 μm	-	0.31″/0.23 μm
Collimatingmirror	0.31″/0.20 μm	0.27″/0.10 μm	0.31″/0.23 μm	-

Table 7. Shape errors and rigid displacement of imaging spectrometer on 0-40 ℃ temperature load

View table

Table 7. Shape errors and rigid displacement of imaging spectrometer on 0-40 ℃ temperature load

Parameter		Mirror	Grating	Image plane	Collimating mirror
max	R_MS /nm	12.9	15.8	16.4	17.9
	P_V /nm	86.2	75.2	79.3	102.8
	Rigid angular displacement /(″)	39.8	35.1	33.3	40.4
	Rigid line displacement /μm	50.4	36.3	24.7	55.6
min	R_MS /nm	5.0	4.6	4.8	5.0
	P_V /nm	32.1	24.0	32.4	27.1
	Rigid angular displacement /(″)	9.9	8.6	8.3	18.7
	Rigid line displacement /μm	12.6	9.1	6.2	13.7

Table 8. Max relative displacement between mirrors on 0-40 ℃ temperature load (angular displacement/line displacement)

View table

Table 8. Max relative displacement between mirrors on 0-40 ℃ temperature load (angular displacement/line displacement)

Component	Mirror	Grating	Image plane	Collimating mirror
Mirror	—	38.7″/40.3 μm	54.3″/28.7 μm	45.4″/53.9 μm
Grating	38.7″/40.3 μm	—	32.3″/33.7 μm	16.6″/19.0 μm
Image plane	54.3″/28.7 μm	32.3″/33.7 μm	—	31.7″/51.8 μm
Collimatingmirror	45.4″/53.9 μm	16.6″/19.0 μm	31.7″/51.8 μm	—

Table 9. Sinusoidal vibration test condition
View table
Table 9. Sinusoidal vibration test condition
Frequency /Hz Magnitude /g Scanningspeed /(oct·min^-1) Experimentaldirection
5-150 0.8 5 X,Y,Z

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Zhizhong Zheng, Zhong Yang, Yuantian Qin, Liguo Wang. Structure Analysis and Experiment of an Offner-Type Short-Wave Infrared Imaging Spectrometer[J]. Laser & Optoelectronics Progress, 2020, 57(5): 053001

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Paper Information

Category: Spectroscopy

Received: Aug. 5, 2019

Accepted: Aug. 27, 2019

Published Online: Mar. 5, 2020

The Author Email: Zheng Zhizhong (zhengzz_js@126.com)

DOI:10.3788/LOP57.053001

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. 0 Absorption position at different temperaturesnm

Table 1. 0 Absorption position at different temperaturesnm

Table 1. Index parameters of imaging spectrometer

Table 1. Index parameters of imaging spectrometer

Table 1. 1 Spectral bandwidth value under different temperaturenm

Table 1. 1 Spectral bandwidth value under different temperaturenm

Table 2. Material property sheet for imaging spectrometer

Table 2. Material property sheet for imaging spectrometer

Table 3. Shape errors and rigid displacement with 4 g acceleration load

Table 3. Shape errors and rigid displacement with 4 g acceleration load

Table 4. Relative displacement between mirrors on X-direction 4 g acceleration load (angular displacement/line displacement)

Table 4. Relative displacement between mirrors on X-direction 4 g acceleration load (angular displacement/line displacement)

Table 5. Relative displacement between mirrors on Y-direction 4 g acceleration load (angular displacement/line displacement)

Table 5. Relative displacement between mirrors on Y-direction 4 g acceleration load (angular displacement/line displacement)

Table 6. Relative displacement between mirrors on Z-direction 4 g acceleration load (angular displacement/line displacement)

Table 6. Relative displacement between mirrors on Z-direction 4 g acceleration load (angular displacement/line displacement)

Table 7. Shape errors and rigid displacement of imaging spectrometer on 0-40 ℃ temperature load

Table 7. Shape errors and rigid displacement of imaging spectrometer on 0-40 ℃ temperature load

Table 8. Max relative displacement between mirrors on 0-40 ℃ temperature load (angular displacement/line displacement)

Table 8. Max relative displacement between mirrors on 0-40 ℃ temperature load (angular displacement/line displacement)

Table 9. Sinusoidal vibration test condition

Table 9. Sinusoidal vibration test condition