Analysis of Optomechanical Characteristics of Semi-Ellipsoidal Mirrors for Measuring High-Temperature Optical Parameters of Materials

Hengrui Guan; Fenghua Zheng; Wenxiang Li; Chao Kang; Yongxing Yang; Jinpeng Li

doi:10.3788/AOS202141.0608002

Acta Optica Sinica, Volume. 41, Issue 6, 0608002(2021)

Analysis of Optomechanical Characteristics of Semi-Ellipsoidal Mirrors for Measuring High-Temperature Optical Parameters of Materials

Hengrui Guan¹, Fenghua Zheng^1,2、*, Wenxiang Li¹, Chao Kang¹, Yongxing Yang¹, and Jinpeng Li^1,2、**

Author Affiliations

¹Nanjing Research Center of Astronomical Instruments, University of Science and Technology of China, Hefei, Anhui 230022, China

²Nanjing Astronomical Instruments Co., Ltd., Chinese Academy of Sciences, Nanjing Jiangsu 210042, China

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Figures & Tables(14)

Fig. 1. Light path of device

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Fig. 2. Diagram of semi-ellipsoidal mirror

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Fig. 3. Ray tracing result of semi-ellipsoidal mirror

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Fig. 4. Convergent focus spots generated when luminous surface source is located at different positions near focal point. (a) At focus position; (b) at +2.5 mm in x direction; (c) at -2.5 mm in x direction; (d) at +2.5 mm in y direction; (e) at -2.5 mm in y direction

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Fig. 5. Irradiance on sample surface from black body radiation sources with different diameters. (a) Black body radiation source with Φ5 mm diameter; (b) black body radiation source with Φ10 mm diameter; (c) black body radiation source with Φ15 mm diameter

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Fig. 6. Diagram of finite element modeling of semi-ellipsoidal mirror

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Fig. 7. Surface shape changes of semi-ellipsoidal reflector under different temperature loads. (a) 22 ℃; (b) 24 ℃; (c) 26 ℃; (d) 28 ℃; (e) 30 ℃

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Fig. 8. Irradiance formed by the black body radiation source on the surface of the sample to be tested at 30 ℃

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Fig. 9. Initial detection surface shape of the reflective surface of the semi-ellipsoidal mirror

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Fig. 10. Final inspection surface shape of semi-ellipsoidal mirror

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Table 1. Optical tracing parameters of semi-ellipsoid mirror

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Table 1. Optical tracing parameters of semi-ellipsoid mirror

Modeling project	Setting type
Inner surface of semi-ellipsoidal mirror	Golden mask; reflectivity of 98.3%;parameters in model: A=0.0001, B=0.015, g=2
Blackbody radiating surface	Radiation source is lattice point light source; each wavelength(2 μm, 5 μm, or 16 μm) traces 29701 rays; radiation angle is 120°
Surface of sample to be tested	Surface is set as a perfect absorber with a radius of 2.5 mm

Table 2. Light energy utilization when point light source is located at different positions
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Table 2. Light energy utilization when point light source is located at different positions
Position Focus position At +2.5 mm inx direction At -2.5 mm inx direction At +2.5 mm iny direction at -2.5 mm iny direction
Light energyutilization /% 95.0 17.0 17.0 12.5 12.5

Table 3. Deformation of working surface of semi-ellipsoidal reflector at different temperatures
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Table 3. Deformation of working surface of semi-ellipsoidal reflector at different temperatures
Temperature /℃ 22 24 26 28 30
Maximal deformation /mm 8.243×10^-5 3.049×10^-2 6.105×10^-2 9.160×10^-2 0.122
Average deformation /mm 2.971×10^-5 1.767×10^-2 3.537×10^-2 5.300×10^-2 0.071

Table 4. Detection results of inner surface of semi-ellipsoidal mirror

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Table 4. Detection results of inner surface of semi-ellipsoidal mirror

Measurementserial number	Peak valley(PV) value /λ	RMSvalue /λ
1	80.278	10.802
2	162.070	10.524
3	96.956	14.800
4	99.498	9.410
5	214.182	8.959
6	138.227	7.344
7	80.773	5.149
8	96.005	4.753
9	128.210	4.806
10	210.114	19.985
11	192.564	18.623
12	216.705	18.619
13	210.081	17.296
14	182.487	15.536
15	169.210	13.318
16	152.320	11.379
17	162.070	10.524
18	156.449	9.091

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Hengrui Guan, Fenghua Zheng, Wenxiang Li, Chao Kang, Yongxing Yang, Jinpeng Li. Analysis of Optomechanical Characteristics of Semi-Ellipsoidal Mirrors for Measuring High-Temperature Optical Parameters of Materials[J]. Acta Optica Sinica, 2021, 41(6): 0608002

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Paper Information

Category: Geometric Optics

Received: Sep. 29, 2020

Accepted: Nov. 9, 2020

Published Online: Apr. 7, 2021

The Author Email: Zheng Fenghua (13770646779@163.com), Li Jinpeng (kingpenglee@163.com)

DOI:10.3788/AOS202141.0608002

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Optical tracing parameters of semi-ellipsoid mirror

Table 1. Optical tracing parameters of semi-ellipsoid mirror

Table 2. Light energy utilization when point light source is located at different positions

Table 2. Light energy utilization when point light source is located at different positions

Table 3. Deformation of working surface of semi-ellipsoidal reflector at different temperatures

Table 3. Deformation of working surface of semi-ellipsoidal reflector at different temperatures

Table 4. Detection results of inner surface of semi-ellipsoidal mirror

Table 4. Detection results of inner surface of semi-ellipsoidal mirror