Acta Optica Sinica, Volume. 41, Issue 16, 1622001(2021)
Study on Stressed Mirror Lapping and Testing of Φ380 mm Thin Mirror
Fig. 1. O-XYZ global coordinate system and o1-xyz local coordinate system of off-axis aspherical mirror
Fig. 2. TDDSA surface detection system
Fig. 3. Significance and relation of different defocus coefficients
Fig. 4. Prestressed loading mechanism
Fig. 5. Zernike polynomial coefficient distribution curves of difference between mirror deformation and theoretical surface shape after multiple loading correction
Fig. 6. Process scene of stressing lapping
Fig. 7. Convergence curves of stressing processing. (a) Stressing lapping experiment; (b) Ref. [8]
Fig. 8. Mirror surface roughness measurement site
Fig. 9. Relative deformation between meniscus and reference spherical mirror with 9 points Whiffletree support
Fig. 10. Measuring of surface shape after stressing lapping using CMM
Fig. 11. Final detection results of CMM and contact TDDSA. (a) Average surface shape obtained by multiple measurements using CMM; (b) average surface profile obtained by multiple measurements of contact TDDSA; (c) residual distribution between average surface profile and theoretical off-axis aspheric surface profile obtained by multiple measurements using CMM; (d) residual distribution between average surface profile and theoretical off-axis aspheric surface profile obtained by multiple measurements of contact TDDSA
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Zibo Jiang, Zhe Chen, Xingtao Liu, Xiaojie Jiao, Kunxin Chen. Study on Stressed Mirror Lapping and Testing of Φ380 mm Thin Mirror[J]. Acta Optica Sinica, 2021, 41(16): 1622001
Category: Optical Design and Fabrication
Received: Jan. 11, 2021
Accepted: Mar. 18, 2021
Published Online: Aug. 12, 2021
The Author Email: Jiang Zibo (zbjiang@niaot.ac.cn)