Required precision of mirror surface for solar furnace

Koro Shishido; Yukio Shibata; Masao Sugiura; Tetsuo Shoji

doi:10.1117/12.218443

8 September 1995 Required precision of mirror surface for solar furnace

Koro Shishido, Yukio Shibata, Masao Sugiura, Tetsuo Shoji

Proceedings Volume 2536, Optical Manufacturing and Testing; (1995) https://doi.org/10.1117/12.218443
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

The precision of beautifully finished quadratic surfaced mirrors is about +/- 1/10000th approximately +/- 1/15000th of a radian, performed by the experts, they are called 'Master'. These performances 'beautifully finished' have been done by Master's intuitions or experiences, so it is difficult for mass production of a high quality product. We are trying to reach the Master's territory by using mechanical methods. These are cam and link methods, link-gear-cam method, and glass gauge method. In these methods, the large solar furnace has been produced by cam method, the mirror was ground directly, then mirror precision reached in +/- 1/6000th aprroximately +/- 1/8000th of a radian. In another method, link method, link-gear-cam method, and glass gauge method are used for production of quadratic surfaces master molds, and the glass plates are softened for the quadratic surfaced mirror by these master molds. For example, the precision of the master molds which was fabricated by the cutting machine constructed from the link-gear-cam mechanisms are +/- 1/3000th of a radian, and the precision of master molds which was fabricated by the glass gauge cutting machine are +/- 1/6000th approximately +/- 1/7000th of a radian. Lately, we have considered the quadratic cutting machine constructed from the cylinder type tool for the large diameter of the quadratic surfaces.

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Koro Shishido, Yukio Shibata, Masao Sugiura, and Tetsuo Shoji "Required precision of mirror surface for solar furnace", Proc. SPIE 2536, Optical Manufacturing and Testing, (8 September 1995); https://doi.org/10.1117/12.218443

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KEYWORDS

Glasses

Cutting equipment

Mirrors

Image segmentation

Content addressable memory

Sun

Aluminum

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