The effects of the film manufacturing techniques, of the exposure procedures and of the development and post-treatment thermochemical processes on the holographic properties of HOEs in DCG

The subject matter of this presentation is to review the results of a research program whose objective is the development of a technology for the serial manufacturing of high efficiency HOE (Holographic Optical Elements) with predetermined spectral characteristics and angular selectivity with apertures ranging from few square millimeters to square meters. The developed technology includes the machine fabrication of precision holographic films (2 to 50 micron thickness) on glass or plastic substrata and chemically and thermally adapted hologram development processes. The desired optical properties of the holographic material for a specific technical application are preset during the making of the film and are modified during the exposure and the development of the HOE.