New PDF release: Advanced Optics Using Aspherical Elements

By Braunecker B., Hentschel R., Tiziani H.

ISBN-10: 0819467499

ISBN-13: 9780819467492

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Details are discussed in Fluid jet polishing (Fähnle, Sec. 6), Magnetorheological finishing (MRF) (Haag-Pichl, Sec. 3), Robot polishing (Schwarzhans, Sec. 5), Computer controlled polishing (CCP), and Ion Beam figuring (Börret, Secs. 7). 4 Computer-controlled polishing (CCP) The principle of CCP is shown in Fig. 7. As already mentioned, CCP was the first local correction method and is characterized by the following features: • • • • • • • The tool is a flexible subaperture pad. Removal is generated by a chemo-mechanical process, as shown in Fig.

65 have been recently demonstrated for thermoplastics. The major problem, not yet solved, is the high amount of scattering, mainly caused by the insufficient dispersion of the nanoparticles. 3 Glass Ceramics Zero-expansion glass ceramics such as Zerodur from SCHOTT are typical materials to be used in reflective optics (mirrors) with asperical shapes. Normally, the dimensions of such mirrors are outstanding (1–4 m in diameter). Typical application fields are astronomy and LCD projection systems.

Polymers in general have low transmission in the UV. Additionally, they show solarization effects at lower wavelengths, causing further transmission losses due to degradation effects during light exposure. , YAG, Yttria), high transmission values are obtained. In the UV region below 250 nm, fused silica, phosphate glasses, CaF or LuAG crystals, as well as Spinel optoceramics can be used. In the three IR bands (1–14 μm), for example, germanate glasses, chalcogenide glasses, ZnS, ZnSe crystals, or optoceramics such as AlON, YAG, yttria, or Spinel show advantageous properties (Fig.

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Advanced Optics Using Aspherical Elements by Braunecker B., Hentschel R., Tiziani H.

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