Optical: systems and elements – Holographic system or element – Using modulated or plural reference beams
Patent
1997-06-17
1999-04-06
Spyrou, Cassandra
Optical: systems and elements
Holographic system or element
Using modulated or plural reference beams
359 1, 359 10, 359 12, 359 22, 359 30, G03H 112, G03H 100, G03H 126
Patent
active
058925970
ABSTRACT:
A holographic recording apparatus includes first and second light sources for respectively generating first and second light beams. A mask is located in front of a hologram recording material and has an aperture. Interference fringes are recorded in a hologram cell on the hologram recording material corresponding to the aperture. A movement mechanism supports the hologram recording material masked by the mask and relatively moves the hologram recording material with respect to the mask in predetermined directions so that an interference pattern is formed in an area on the hologram recording material. A spatial frequency changing mechanism changes incident angles of the first and second light beams with respect to the mask.
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Hasegawa Shin-ya
Iwata Shigetake
Kayashima Shigeo
Maeda Satoshi
Chang Audrey
Fujitsu Limited
Spyrou Cassandra
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