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rewritable holograms based on azobenzene-containing liquid-crystalline polymers - transparent holographic film

by:Cailong     2019-07-02
rewritable holograms based on azobenzene-containing liquid-crystalline polymers  -  transparent holographic film
Design and preparation of even benzene
Polymer-containing, large light-induced changes showing refractive index, and their presence in erasable Raman-
Nath and the Prague hologram are reviewed.
An optical transparent film with a thickness of> 200 u2009 μm was prepared with a random polymer, which contains light response and amplification components in the side chain.
A variety of even benzene colored substances are used as light response components.
As an amplification component, the parts of benzene C and Toran are combined together, which enhances the change of refractive index caused by even benzene.
When the two beams are written to overlap in the film, periodic changes in the refraction index are caused, and the beam is detected with a diffraction efficiency of 100 100%.
By heat treatment or by light irradiation with a single written beam, the recorded holographic image can be erased.
The number of angular weights is from high-
Density information storage.
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