Visual Appearance Effect on Modified Reconstruction Color Images of Optical Fourier Transform Hologram by Means of Digital Image Processing

摘要

A blue white He-Cd laser composed of three R/G/B component beams in place of He-Ne I aser is directly applied to fabricate the optical Fourier transform hologram (OFTH) using the red sensitive silver halide material (S0-253 film) for holography As a result, the red beams (636.0 and 635.5 [nm]) play an important role as the coherent beams in the fabrication of OFTH. A green (or blue) solid state laser is applied to fabricate the OFTH using the same film for holography. The visual appearance of reconstructed color images caused by He-Cd laser is discussed in contrast to that of an ordinary OFTH which can be made using the He-Ne laser and sol id state laser. The visual color effect us ing the He-Cd laser is checked from the viewpoint of the relative real size and its place in the OFTH, and the visual depth sensation of overlapped ghost images called cross-talk in the Fresnel hologram. The purpose using a commercially available software such as HSL color model is to carry out the intuitive modification of overlapped and deteriorated color images in the digital reconstruction of OFTH and Fresnel hologram.