Optical figuring and testing of the VLT 8.2-m primary mirrors

P. Beraud; Jean Espiard; Roland Geyl; Jacques Paseri; Philippe Dierickx; Daniel Enard; Alain Michel

doi:10.1117/12.218460

8 September 1995 Optical figuring and testing of the VLT 8.2-m primary mirrors

P. Beraud, Jean Espiard, Roland Geyl, Jacques Paseri, Philippe Dierickx, Daniel Enard, Alain Michel

Proceedings Volume 2536, Optical Manufacturing and Testing; (1995) https://doi.org/10.1117/12.218460
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

The primary mirrors for the ESO very large telescope project consist of four f/1.8 8.2-m diameter actively supported Zerodur menisci, 175 mm thick. Their optical figuring is under way at REOSC (France) plant. Two mirror blanks have been delivered to the optical manufacturer and the two remaining at the blanks' manufacturer (SCHOOT Mainz, Germany) are due for delivery by the second hald of 1995. Th polishing of the first Zerodur mirror blank is due for completion in the third quarter of 1995. The REOSC optical fabrication and testing methodology will be presented, and the current results will be compared to the specified performance.

Citation Download Citation

P. Beraud, Jean Espiard, Roland Geyl, Jacques Paseri, Philippe Dierickx, Daniel Enard, and Alain Michel "Optical figuring and testing of the VLT 8.2-m primary mirrors", Proc. SPIE 2536, Optical Manufacturing and Testing, (8 September 1995); https://doi.org/10.1117/12.218460

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