Reflection coatings

These alloys are of vital importance in the construction of modern aircraft and rockets. Aluminum, evaporated in a vacuum, forms a highly reflective coating for both visible light and radiant heat. These coatings soon form a thin layer of the protective oxide and do not deteriorate as do silver coatings. They are used to coat telescope mirrors and to make decorative paper, packages, toys. 

Diffusion barriers and anti-reflection coatings in integrated circuits. 

Optical coatings, anti-reflection coatings, and coatings for hot mirrors. 

Reflective coatings are found in astronomical instruments, telescopes, spectrometers, rangefinders, projectors, microfilm readers, television tubes, diffraction gratings, interferometers, beam splitters, lasers, and many other applications. 

Get the light into the detector. This may sound trivial, but unless a good anti-reflection coating is used, a significant fraction of the light will be reflected at the surface of the photosensitive material. 

Getting light into the detector anti-reflection coatings... 

In comparison to infrared detectors, it is much more difficult for silicon-based optical detectors to achieve high QE over a wide bandpass. The main challenge is the tremendous variation of absorption depth shown in Fig. 8. In addition, the index of refraction varies significantly for A = 0.32-1.1 m, as shown in Fig. 10, making it difficult to optimize anti-reflection coatings for broad bandpass. 

B roadband coatings. Broader bandwidth reflective coatings can be achieved. Figure 3 shows a 400 nm wide coating consisting of 22 layers arranged as... 

Figure 3. A broadband reflecting coating, achieved with 22 layers (top). Simply adding a poorly matched layer lead to a significantly lower reflectance (bottom)...

Figure 10. Transmittance of the reflection coating of Fig. 8. The coating with a halfwave entrance layer gives the better transmittance curve.

Figure 18. Transmission of crystalline quartz in the range beyond 20 microns. The A and C curves were obtained for anti-reflection coated samples and the B curve for...

Even in the Renaissance, the deceptively realistic imitation of nature in art n/as considered proof of an artist s superior technical ability. The Field of Flowers playfully takes up this artistic tradition of imitating nature and sets the petals in motion, causing them to rhythmically open and close. The photovoltaic module that supplies the energy for this is in the center the petals have a reflective coating on the outside, so that they mirror their surroundings when closed. 

RC = Reflective coating (mirrored surface), and PP = Photographic plate. 

In conclusion, it has been demonstrated that the manufacture of waveguides, Bragg reflectors, Fabry-Perot filters and anti-reflective coatings can be based on PS thin films. Such filters are applied for example in gas sensors, as described in the preceding section. 

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