Colour-separating mirrors

Dielectric colour-separating mirrors made of extremely hard and chemically resistant oxide multilayer films enable nearly losss-free separation or mixture of the primary colours. Such colour splitters can be made for different spectral ranges of the reflection band, broadband and narrowband. Fig. 16 shows an example of a red reflector at 45° incidence. 

Blue, green and red narrow band colour separators (mirrors/filters). 

Another application for colour separators is film printing. In this case, the primary colours are separated by means of mirrors, which produce three colour channels. Apertures mounted in each channel then provide continuous regulation of the light intensity for proper colour balance and production, as shown in Fig. 19. Poor quality colour film copies sometimes result from the overlapping sensitivity ranges... 

It is a natural consequence to show more than one field of view in the same display, when several mirror classes are to he replaced [1]. Nevertheless, it is still important that separate views with different vision information can be distinguished from one another, and that they are shown simultaneously in a synchronized way. The latter is not only true regarding the basics of providing views, but also when it comes to aspects like colour reproduction and light intensities representing the surrounding conditions. 

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