Examination of the Blank Error on Mirror Accuracy of Lightweight SiC Mirror and a Compensation Method
Due to excellent characteristics of specific stiffness and thermal stability, silicon carbide-based (SiC) material is commonly selected to construct large-scale lightweight mirror. In general, the fabrication process of SiC mirror is similar to the casting process. The blank error of SiC mirror is 0...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-05-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/9/5/360 |
| _version_ | 1797496457008250880 |
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| author | Ping Jiang Pingwei Zhou |
| author_facet | Ping Jiang Pingwei Zhou |
| author_sort | Ping Jiang |
| collection | DOAJ |
| description | Due to excellent characteristics of specific stiffness and thermal stability, silicon carbide-based (SiC) material is commonly selected to construct large-scale lightweight mirror. In general, the fabrication process of SiC mirror is similar to the casting process. The blank error of SiC mirror is 0~1 mm. Due to the high hardness of SiC, only the mirror surface and some positioning surface will be milled. The mirror surface accuracy will be degraded due to the fact that the blank error can cause significant changes in weight distribution. In this paper, Monte Carlo analysis is firstly performed to examine the blank error on gravity center, stiffness and mirror accuracy of a SiC mirror. It is found that according to the designed mount location, the amount of degradation is more than 2.5 nm of which the probability is 40.3%. It is known that the error of gravity center can be compensated by optimizing the axial mount location. Then inverse modeling and testing of gravity center for the SiC mirror is carried out in order to determine the optimal axial mount location. Based on the proposed method, the mirror degradation introduced by the blank error has been eliminated to the greatest extend. |
| first_indexed | 2024-03-10T03:03:54Z |
| format | Article |
| id | doaj.art-9bc0cde20e5445d0b05ed8edab5e652b |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-10T03:03:54Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-9bc0cde20e5445d0b05ed8edab5e652b2023-11-23T12:41:24ZengMDPI AGPhotonics2304-67322022-05-019536010.3390/photonics9050360Examination of the Blank Error on Mirror Accuracy of Lightweight SiC Mirror and a Compensation MethodPing Jiang0Pingwei Zhou1Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Dong-Nanhu Road 3888, Changchun 130033, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Dong-Nanhu Road 3888, Changchun 130033, ChinaDue to excellent characteristics of specific stiffness and thermal stability, silicon carbide-based (SiC) material is commonly selected to construct large-scale lightweight mirror. In general, the fabrication process of SiC mirror is similar to the casting process. The blank error of SiC mirror is 0~1 mm. Due to the high hardness of SiC, only the mirror surface and some positioning surface will be milled. The mirror surface accuracy will be degraded due to the fact that the blank error can cause significant changes in weight distribution. In this paper, Monte Carlo analysis is firstly performed to examine the blank error on gravity center, stiffness and mirror accuracy of a SiC mirror. It is found that according to the designed mount location, the amount of degradation is more than 2.5 nm of which the probability is 40.3%. It is known that the error of gravity center can be compensated by optimizing the axial mount location. Then inverse modeling and testing of gravity center for the SiC mirror is carried out in order to determine the optimal axial mount location. Based on the proposed method, the mirror degradation introduced by the blank error has been eliminated to the greatest extend.https://www.mdpi.com/2304-6732/9/5/360lightweight mirrorblank errormirror accuracyMonte Carlo analysiscompensation method |
| spellingShingle | Ping Jiang Pingwei Zhou Examination of the Blank Error on Mirror Accuracy of Lightweight SiC Mirror and a Compensation Method Photonics lightweight mirror blank error mirror accuracy Monte Carlo analysis compensation method |
| title | Examination of the Blank Error on Mirror Accuracy of Lightweight SiC Mirror and a Compensation Method |
| title_full | Examination of the Blank Error on Mirror Accuracy of Lightweight SiC Mirror and a Compensation Method |
| title_fullStr | Examination of the Blank Error on Mirror Accuracy of Lightweight SiC Mirror and a Compensation Method |
| title_full_unstemmed | Examination of the Blank Error on Mirror Accuracy of Lightweight SiC Mirror and a Compensation Method |
| title_short | Examination of the Blank Error on Mirror Accuracy of Lightweight SiC Mirror and a Compensation Method |
| title_sort | examination of the blank error on mirror accuracy of lightweight sic mirror and a compensation method |
| topic | lightweight mirror blank error mirror accuracy Monte Carlo analysis compensation method |
| url | https://www.mdpi.com/2304-6732/9/5/360 |
| work_keys_str_mv | AT pingjiang examinationoftheblankerroronmirroraccuracyoflightweightsicmirrorandacompensationmethod AT pingweizhou examinationoftheblankerroronmirroraccuracyoflightweightsicmirrorandacompensationmethod |