DIFFRACTION PROPERTIES OF WINDSHIELD LAMINATED PHOTOPOLYMER HOLOGRAMS

A hologram laminated into a windshield has an important application in automotive head-up displays. In general, properties of these hologram s change during processing. The changes of the diffraction properties are characterized by the diffraction efficiency measurement. The photo polymer hologram, which is sandwiched between a polyvinybutyral layer and glass ply, is treated at high temperature up to 140 degrees C and about 12.5 kg cm(-2) pressure, as used in a standard windscreen produc tion process. The pressure effect on diffraction properties of windshi eld laminated photopolymer holograms is investigated. Non-slanted and slanted holograms are analysed and compared with the experimental data .