Analysis on thermal sensitivity of 2D Profilometer used for TMT Glass Polishing
- Title
- Analysis on thermal sensitivity of 2D Profilometer used for TMT Glass Polishing
- Creator
- Panchal P.; Jha S.K.; Basheer A.; Valsan V.; Gajanan Deshmukh P.; Sriram S.
- Description
- TMT adopts Stressed Mirror Polishing (SMP) technology for the polishing of mirror segments. In this process, the meniscus type spherical shape glass blanks are converted in to a desired aspheric shape by spherical grinding and polishing in the stressed condition. After each grinding and polishing activity metrological measurements are done using different metrology tools. The metrology tool named as 2D-Profilometer is used for low frequency error/foam measurements. It consists of 61 high precision length gauges attached to Carbon Fiber Reinforced Polymer (CFRP) sandwiched Aluminum panel of diameter 1.6 meter in spiral direction. The coefficient of thermal of CFRP is very low however, a small delta temperature variation between the top and bottom sheet of CFRP of the panel will lead to panel bowing which will result in increasing power error. Hence, the objective this work is to analyse the thermal sensitivity of the 2D Profilometer. 2024 SPIE.
- Source
- Proceedings of SPIE - The International Society for Optical Engineering, Vol-13100
- Date
- 2024-01-01
- Publisher
- SPIE
- Subject
- 2-Dimensional Profilometer; Glass Roundel; Reference Sphere; Stressed Mirror Polishing
- Coverage
- Panchal P., India TMT Optical Fabrication Facility, Indian Institute of Astrophysics, Karnataka, Bengaluru, 560034, India; Jha S.K., India TMT Optical Fabrication Facility, Indian Institute of Astrophysics, Karnataka, Bengaluru, 560034, India; Basheer A., India TMT Optical Fabrication Facility, Indian Institute of Astrophysics, Karnataka, Bengaluru, 560034, India; Valsan V., Department of Physics, Christ University, Karnataka, Bengaluru, 560034, India; Gajanan Deshmukh P., India TMT Optical Fabrication Facility, Indian Institute of Astrophysics, Karnataka, Bengaluru, 560034, India; Sriram S., India TMT Optical Fabrication Facility, Indian Institute of Astrophysics, Karnataka, Bengaluru, 560034, India, Department of Physics, Christ University, Karnataka, Bengaluru, 560034, India
- Rights
- Restricted Access
- Relation
- ISSN: 0277786X; ISBN: 978-151067523-0; CODEN: PSISD
- Format
- Online
- Language
- English
- Type
- Conference paper
Collection
Citation
Panchal P.; Jha S.K.; Basheer A.; Valsan V.; Gajanan Deshmukh P.; Sriram S., “Analysis on thermal sensitivity of 2D Profilometer used for TMT Glass Polishing,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 25, 2025, https://archives.christuniversity.in/items/show/19125.