US 6,618,175 B1Granted

Holographic stereogram preparation apparatus

AssigneeSony Corporation

InventorAkira Shirakura

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Abstract

A bright holographic stereograin having a high diffraction efficiency can be prepared by restricting vibrations. The apparatus comprises: an optical system 15 for letting an objective laser L2 beam subjected to image-modulation based on each image of a parallax image sequence and a reference laser L3 beam having coherence with respect to the objective laser beam L2 enter into a recording medium 3 and for recording interference fringes generated by the objective laser beam L2 and the reference laser beam L3, as a hologram element, onto the recording medium 3; an anti-vibration support means 19 for supporting the optical system 15 on a casing 20 while preventing vibrations; and cooling means 48 to 52 for cooling the optical system 15. The cooling means is constructed by drive sections 48 and 49 whose vibrations are prevented from being transferred to the optical system 15 by providing the cooling means in the casing side, and ducts 50, 51, and 52 made of non-rigid materials connecting the drive sections 48 and 49 with the optical system 15, and the objective and reference laser beams L2 and L3 kept in a stable state are let into the recording medium 3.

Claims27

Dependent claims

A holographic stereogram preparation apparatus comprising:

an optical system, said optical system including a light source, an interference fringe detector, and a recording medium,
said interference fringe detector detecting vibration and generating a detection output, said detection output being capable of halting recording on said recording medium;
a cooling member, said cooling member cooling said optical system, said cooling member including a heat sink member adjacent said optical system, said heat sink member supporting a portion of said optical system and removing heat from said optical system, said cooling member cooling said heat sink member, said cooling member including:
a ventilation fan adjacent an apparatus casing;
a ventilation duct connected to said ventilation fan, said ventilation duct channeling a cooling substance between said light source and said ventilation fan;
a connection duct, said connection duct channeling said cooling substance between said light source and said heat sink member;
an exhaust fan adjacent said apparatus casing;
and
an exhaust duct connected to said exhaust fan, said exhaust duct channeling said cooling substance between said heat sink member and said exhaust fan;
a support board adjacent said heat sink member, said support board supporting said portion of said optical system and said heat sink member;
at least one damper, said at least one damper reducing said vibration to said optical system;
and
said apparatus casing containing said optical system, said cooling member, said at least one damper, and said support board.

10 more elements

A holographic stereogram preparation apparatus comprising:

an optical system, said optical system including a light source, an image modulation device, and a recording medium, and an interference fringe detector,
said light source being adapted to emit a light beam,
said image modulation device modulating said light beam to produce a modulated light beam,
said recording medium recording said modulated light beam, and
said interference fringe detector detecting vibration, said interference fringe detector generating a detection output, said detection output being capable of halting recording said modulated light beam;
a heat sink member adjacent said optical system, said heat sink member supporting a portion of said optical system and removing heat from said image modulation device;
a cooling member, said cooling member cooling said heat sink member and said light source;
a support board adjacent said heat sink member, said support board supporting said portion of said optical system and said heat sink member;
a damper, said damper supporting said optical system, said heat sink member, and said support board;
an apparatus casing, said apparatus casing encasing said optical system, said cooling member, said damper, and said support board, said damper reducing said vibration to said optical system by insulating said optical system from said vibration present at said apparatus casing.

7 more elements

A holographic stereogram preparation apparatus comprising:

an optical system, said optical system including a light source and an interference fringe detector,
said interference fringe detector detecting a vibration and generating a detection output, said detection output being capable of halting recording on a recording medium;
a cooling member, said cooling member cooling said optical system, said cooling member including a heat sink member adjacent said optical system and a connection duct,
said heat sink member supporting a portion of said optical system and removing heat from said optical system, said cooling member cooling said heat sink member,
said connection duct channeling a cooling substance between said light source and said heat sink member;
a support board adjacent said heat sink member, said support board supporting said portion of said optical system and said heat sink member;
at least one damper, said at least one damper reducing said vibration to said optical system;
and
said apparatus casing containing said optical system, said cooling member, said at least one damper, and said support board.

6 more elements

Dependencies are inferred from the claim text.