Reflection hologram recording and reproducing
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The first reflection hologram is product of the Soviets shot, he holography and Lippmann's colour images combine to present the thing beam and the reference light from the other way of propagation and interference fringes recorded on the thick latex. Such a laser hologram recording, reproducing monochromatic pictures will be reproduced, due to the wavelength selectivity of the diffraction efficiency, the usage of white could be reproduced, observed quasi-monochromatic photographs of different colors, the white coloration of the reconstructed picture, as the recording the laser wavelength and the thickness of the latex relying on the amount of shrinkage.
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1960s, holography recording medium is mainly silver dry plate, and the resulting diffraction effectivity of the hologram is low, 70 years later, dichromated gelatin (DCC) is used and dry plate silver bleaching process, the hologram The diffraction effectivity was considerably improved. To the eighties and nineties have been generally used section-type recording medium equivalent to a photoresist. White reflection hologram can be reproduced with its benefits, has turn out to be one of many major sorts of holographic display.
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Fresnel-type reflection hologram
Enlarged after a laser beam direct dry plate, the transmittance gentle onto the object to achieve the recording medium by diffuse reflection, the reference gentle projected onto the object mild from both sides of the latex to form on the reflection hologram. This recording optical path is easy and sensible, suitable for prime scattering charge objects, equivalent to jewellery, coins, badges, etc.; low scattering rate for certain objects on its floor might be coated with silver or glass beads a form of excessive-reflectance materials to ensure that the material will not be too weak gentle reflection. Records required by the gap between the thing and the dry plate near the best object was flat.
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Hologram picture aircraft, picture aircraft hologram recording optical path, the image aircraft is a reflection hologram (quantity) hologram, the thing beam and the reference gentle from the recording medium on both sides of better than 90 days. Angle of incidence, and the date the article between the latex.
Hologram Foil Pattern
Using the imaging lens, a real image of the object into the H nearby.
Reflective hologram image aircraft: The optical recording mild path than the single beam has the advantage that reference, the object beam over the surface in response to the thing D reflectivity adjustment. Place of the item can be changed, however this recording copy is dependent upon the lens field angle relative hole