Opto-Mechanical System Design of Rotating Virtual Objective for Autocollimate Dynamic Target

Yifeng Yang; Yang Zhao

doi:10.3788/LOP202158.2312003

Laser & Optoelectronics Progress, Volume. 58, Issue 23, 2312003(2021)

Opto-Mechanical System Design of Rotating Virtual Objective for Autocollimate Dynamic Target

Yifeng Yang^1,2、* and Yang Zhao^1,2

Author Affiliations

¹Photoelectric Detection and Guidance Division, Shanghai Academy of Spaceflight Technology, Shanghai 201109, China

²Infrared Detection Technology Research & Development Center, China Aerospace Science and Technology Corporation, Shanghai 201100, China

show less

Abstract Get PDF(in Chinese)

Figures & Tables(13)

Fig. 1. Composition and detection principle of dynamic target

Download full size

Fig. 2. Detection principle of dynamic target group

Download full size

Fig. 3. Results of optical design of collimator. (a) Lightpath diagram; (b) MTF curves; (c) spot diagram

Download full size

Fig. 4. Opto-mechanical structure of collimator

Download full size

Fig. 5. Finite element model of main mirror and auxiliary support

Download full size

Fig. 6. Relationship between RMS value of surface error and normalized radial mounting position

Download full size

Fig. 7. Finite element model of collimator. (a) Finite element model; (b) finite element model with displacement constraint; (c) fundamental frequency mode

Download full size

Fig. 8. Simulation results of main mirror surface shape error. (a) Finite element model; (b) rigid body displacement cloud image of main mirror; (c) surface shape error

Download full size

Fig. 9. Simulation results of main mirror surface shape error at typical speed. (a) 0; (b) 60 r·min^-1; (c) 100 r·min^-1

Download full size

Fig. 10. Relationship between main mirror surface shape error and rotational speed

Download full size

Fig. 11. Detection result of wavefront difference of collimator

Download full size

Table 1. Technical index of autocollimation dynamic target
View table
Table 1. Technical index of autocollimation dynamic target
Parameter Value
Rotation speed /（r·min^-1） 0.1-100.0
Field angle /mrad 4
MTF ≥0.2
Aperture of collimator /mm 100
Surface-shape error ≤λ/25
Wavefront aberration ≤λ/15

Table 2. Material parameters of each component in finite element model
View table
Table 2. Material parameters of each component in finite element model
Material Elastic modulus /MPa Density /（g·cm^-3） Poisson’s ratio Coefficient of linear expansion /（10^-6 ℃）
Zerodur 90300 2.53 0.24 0.1
Indium steel 138180 8.10 0.25 1.2
Titanium alloy 106820 4.44 0.34 9.1

Tools

Get Citation

Copy Citation Text

Yifeng Yang, Yang Zhao. Opto-Mechanical System Design of Rotating Virtual Objective for Autocollimate Dynamic Target[J]. Laser & Optoelectronics Progress, 2021, 58(23): 2312003

Download Citation

EndNote(RIS)BibTex Plain Text

Set citation alerts for article

Save article for my favorites