Document recording method and apparatus

A document recording apparatus for recording a document on a microfilm, the document comprising a series of pages for which a format is specified so as to include at least a page representing commencement, a page representing an original, and a page representing conclusion, the apparatus comprising:

• a light source that emits coherent light;
• a splitting unit that splits the coherent light emitted from the light source into two light beams;
• an object light generation unit that irradiates one of the light beams split by the splitting unit at a page, which is to be recorded in an analog data hologram format, and generates reflected object light;
• an object light irradiation unit that regulates a light path of the reflected object light generated by the object light generation unit and irradiates the reflected object light on the microfilm;
• and
• a reference light irradiation unit that regulates a light path of the other light beam split by the splitting unit and irradiates this light beam, as reference light, at a position of the microfilm at which the reflected object light is irradiated, simultaneously with the reflected object light.

A document recording apparatus for recording a document on a microfilm, the document comprising a series of pages for which a format is specified so as to include at least a page representing commencement, a page representing an original, and a page representing conclusion, the apparatus comprising:

• a light source that emits coherent light;
• a splitting unit that splits the coherent light emitted from the light source into two light beams;
• a signal light generation unit that
• includes a spatial light modulator which employs a plurality of pixels and displays a digital image representing document information of a page, which is to be recorded in a digital data hologram format, in a bright-dark image, and which modulates incident light at each pixel in accordance with the displayed digital image,
• causes one of the light beams split by the splitting unit to be incident on the spatial light modulator,
• modulates the light beam in accordance with the digital image displayed at the spatial light modulator, and
• generates signal light;
• a signal light irradiation unit that regulates a light path of the signal light generated by the signal light generation unit and irradiates the signal light on the microfilm;
• and
• a reference light irradiation unit that regulates a light path of the other light beam split by the splitting unit and irradiates this light beam, as reference light, at a position of the microfilm at which the signal light is irradiated, simultaneously with the signal light.

A document recording apparatus for recording a document on a microfilm, the document comprising a series of pages for which a format is specified so as to include at least a page representing commencement, a page representing an original, and a page representing conclusion, the apparatus comprising:

• a light source that emits coherent light;
• a splitting unit that splits the coherent light emitted from the light source into three light beams;
• an object light generation unit that irradiates a first light beam split by the splitting unit at a page, which is to be recorded in an analog data hologram format, and generates reflected object light;
• an object light irradiation unit that regulates a light path of the reflected object light generated by the object light generation unit and irradiates the reflected object light on the microfilm;
• a reference light irradiation unit that regulates a light path of a second light beam split by the splitting unit and irradiates this light beam, as reference light, at a position of the microfilm at which the reflected object light is irradiated, simultaneously with the reflected object light;
• a signal light generation unit that
• includes a spatial light modulator which employs a plurality of pixels and displays a digital image representing document information of a page, which is to be recorded in a digital data hologram format, in a bright-dark image, and which modulates incident light at each pixel in accordance with the displayed digital image,
• causes a third light beam split by the splitting unit to be incident on the spatial light modulator,
• modulates the light beam in accordance with the digital image displayed at the spatial light modulator, and
• generates signal light;
• and
• a signal light irradiation unit that regulates a light path of the signal light generated by the signal light generation unit and irradiates this signal light at the position of the microfilm at which the reflected object light is irradiated, simultaneously with the reference light.