A bright reconstructed image with low noise is obtained by recording the hologram using dichromated gelatin. However,the sensitivity of the dichromated gelatin is low, so long exposure time is required to record the hologram. The silver halide emulsion has two order higher sensitivity than the dichromated gelatin. Then the recording of the color image hologram is relatively easy by using the silver halide emulsion for both green and blue components too. The following two holograms are recorded by this method. The image is seen in front and in rear of the hologram.
Folded-paper crane Soy sauce pot
Permanent display at Kid's Light Science
A long-nosed goblin
Holographic stereogram recorded with only 632.8nm laser light.
Achromachic rainbow hologram recorded by using diffraction grating. The
color of the reconstructed image of rainbow hologram changes as changing
the observation position uop and down. The image is seen with white color
for wide vertical angle by recording the hologram with multiple reference
beams generated by using the diffraction grating.