Coding system based on liquid crystal grating

摘要: The invention discloses a coding system based on liquid crystal grating. comprises light source, front collimating lens group, the grating capable of being coded, back spectrum reading device, control device and mechanical structure fixing system. During work, with certain width is incident to liquidcrystal through controls generate diffraction gratings specific parameters, passesthrough form distribution be coded encrypted; then continues pass group projected thespectrum during decoding, needed information read by selecting line specific-level left-side or right-side as decodingkey comparing decoding screen. easy build manufacture, an encryption space huge, convenient use used for encrypting military general information, it can guaranteed that encrypted content cannot violently decrypted.