By Braunecker B., Hentschel R., Tiziani H.
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Additional resources for Advanced Optics Using Aspherical Elements
Glass aspheres for consumer applications produced by precision molding cost several Euros. Aspheres of larger diameter for industrial optics cost more than 100 Euro per lens. CNC machined lenses in low volumes can cost several thousand Euros. 7 gives a rough overview of the general price range (per kg material) of the material classes. In specific cases, significant deviations from these price regimes exist; for example, special IR-glass can cost more than 10,000 Euro/kg. High prices typically scale with high optical performance.
1 we summarize the application fields, the main drivers, and also the production status. 1 Application ﬁelds, main drivers, and production status. Application fields Large quantities Illuminations Laser collimator Photo-optics Large-format film lenses Small quantities UV-lithography Aerial survey Space communication Correction plate for mirror telescope Advantages and drivers Status Better imaging quality with one element; cost reduction Better imaging quality with one element; cost reduction; beam stability Necessary for zoom systems; cost reduction; better imaging quality; smaller construction length Necessary for zoom systems; cost reduction; better imaging quality; smaller construction length Production Better imaging quality; higher transmission at UV wavelengths Better correction of distortion and telecentricity; cost, weight and size reduction Lightweight; compact layout; radiation resistance Lightweight; compact layout; radiation resistance; better imaging quality Production Production Production Production In preparation Production In study Chapter 4 Materials of Aspheres The introduction of aspherical lenses into optical designs has generated a significant impact on the size, weight, and performance of optical systems.
The tool itself is characterized by a tool function, which is the removal rate at a fixed position (Fig. 12). The desired removal R(x) is the difference between the nominal and real shapes. For the local correction, the tool described by function c(x) has to be moved in a computer-controlled fashion across the surface, such that the desired mass removal R(x) will be achieved. One parameter to optimize the tool path is the dwell time. , surface map from interferometry), and c(x − x ) is the tool function (to be measured).