| Optical Characteristics of Quartz Crystal |
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Besides piezoelectric properties, quartz also has optical properties, notably, outstanding permeability, polarization and rotation over a wide range of wavelengths.
Advances in technology have made it possible to grow stable, high-quality synthetic quartz crystals, which have found a wide range of applications as ideal optical materials.
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| Optical Low Pass Filter(OLPF) |
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Interference between light from the object entering the lens of an optical imaging device and the arrangement of the photodiodes can sometimes create a fine pattern of stripes. If the image is printed "as is", an interference pattern known as "moire" is created, adversely affecting picture quality.
An OLPF (optical low pass filter) has the property of separating light into ordinary and extraordinary optic rays and creating a double image. Building an OLPF into an optical imaging device reduces the stripy pattern to a point where it is invisible to the naked eye, giving a crisp and clear image.
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| Structure and Characteristics |
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 principle figure of quartz crystal optical characteristic (double refraction principal) |
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Structure of OLPF which is used for DSC |
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The comparison of interference fringes(moire fringes) removal |
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