26 Oct 2010 Two well equipped holographic laboratories support both routine production and new product development. Capabilities permit groove spacings of 100 - 2700 grooves per mm. To produce a holographic polariser, an interferometrically generated pattern is produced from monochromatic light and exposed onto a photo-resist coated sustrate. Once developed, the resist has a regular sinusoidal profile which is vacuum aluminised at an oblique angle to create the array of parallel conductors. The fabrication of holographic wire grid polarisers permits the use of a wide variety of infrared materials that do not lend themselves to the ruling process such as BaF2, KRS-5 and Germanium, in addition to the traditional ZnSe and CaF2. They are available with a spacing of 2700 grooves/mm for optimum short wavelength efficiency.
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Wire Grid Polarizers |
