Optimization for support parameters of integration SiC/Al tilt-mirror used for laser communication

Xiaoming Li; Longming Wang; Guoshuai Zhu

doi:10.3788/IRLA20210143

Journals >Infrared and Laser Engineering >Volume 50 >Issue 11 >Page 20210143 > Article

Infrared and Laser Engineering
Vol. 50, Issue 11, 20210143 (2021)

Optimization for support parameters of integration SiC/Al tilt-mirror used for laser communication

Xiaoming Li, Longming Wang, and Guoshuai Zhu

Author Affiliations

National and Local Joint Engineering Research Center of Space and Optoelectronics Technology, Changchun University of Science and Technology, Changchun 130022, China

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DOI: 10.3788/IRLA20210143 Cite this Article

Xiaoming Li, Longming Wang, Guoshuai Zhu. Optimization for support parameters of integration SiC/Al tilt-mirror used for laser communication[J]. Infrared and Laser Engineering, 2021, 50(11): 20210143 Copy Citation Text

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Fig. 1. "One-point to multiple-points" laser communication antenna and two-axis tilt-mirror unit

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Fig. 2. Schematic diagramof tilt-mirror

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Fig. 3. Layout of mounting points of tilt-mirror

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Fig. 4. Relationship between the natural frequency P_n and the height of the support point h

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Fig. 5. Amplified model of mounting points

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Fig. 6. Surface shape of tilt-mirror at different flatness errors

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Fig. 7. Simulation result of tilt-mirror modal. (a) Resonant frequency of each order; (b) Mode shape of first-order resonance frequency

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Fig. 8. [in Chinese]

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Fig. 8. Simulation cloud image of tilt-mirror surface shape change. (a) Surface shape change of the tilt-mirror when the mounting surface error is 3 μm; (b) Surface shape change of the tilt-mirror under 5 ℃ temperature rise load

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Fig. 9. Physical drawing of tilt-mirror and mounting seat. (a) Physical drawing of tilt-mirror; (b) Physical drawing of mounting seat

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Fig. 10. Test result of flatness of tilt-mirror and mirror seat mounting surface. (a) Flatness detection of tilt-mirror mounting surface;(b) Flatness detection of mirror seat mounting surface

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Fig. 11. Test result of tilt-mirror surface shape error. (a) Test result of tilt-mirror surface shape error after installation; (b) Test result of tilt-mirror surface shape error under 5 ℃ temperature rise load

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Material	Elastic modulus/ GPa	Density/ g·cm⁻³	Specific stiffness	Thermal conductivity/ W·m⁻¹·K⁻¹	Linear expansion coefficient/10⁻⁶K⁻¹	Thermal stability
SiC	310	2.92	106	158	2.64	60
SiC/Al	235	3.03	78	230	7.8	29
Crystoe and neoparies	90.6	2.53	36	1.64	0.05	33
Steel(45)	200	7.81	26	48.1	11.59	4
Aluminium	68.2	2.68	25	167	23.6	7
Titanium alloy(TC4)	109	4.44	25	7.8	8.9	0.88

Table 1. Material properties

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b/mm	a/mm
b/mm	5	8	12	15
30	527.1(105.4)	351.4(81.2)	253.0(63.2)	234.2(57.8)
35	332.9(79.1)	253.0(70.8)	225.9(52.7)	234.2(52.6)
40	275.4(70.3)	225.9(58.5)	186.0(45.2)	197.6(48.7)
45	243.3(63.2)	210.8(57.1)	197.6(53.2)	204.0(52.7)
50	253.4(57.5)	234.2(58.8)	218.1(52.4)	210.8(54.1)
55	287.5(71.4)	253.0(63.3)	225.9(52.8)	218.1(57.5）
60	332.9(80.1)	301.2(70.2)	243.3(57.5)	225.9(48.7)

Table 2. Surface shape PV(RMS) value of tilt-mirror at different support point positions

Xiaoming Li, Longming Wang, Guoshuai Zhu. Optimization for support parameters of integration SiC/Al tilt-mirror used for laser communication[J]. Infrared and Laser Engineering, 2021, 50(11): 20210143

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