Generation method for complex amplitude in-line hologram and image recording device using said method

A generation method for generating a complex amplitude in-line hologram from an off-axis hologram, comprising the steps of:

• performing spatial frequency filtering on an off-axis hologram obtained by off-axis holography;
• and
• performing spatial heterodyne modulation on the hologram filtered by the spatial frequency filtering, based on phase of an in-line reference light for reconstruction and phase of an off-axis reference light used for obtaining the off-axis hologram, wherein
• the method generates the complex amplitude in-line hologram by performing the spatial frequency filtering and the spatial heterodyne modulation in order.

An image recording device for generating a complex amplitude in-line hologram from an off-axis hologram which records an object image so as to record the hologram electronically as object image information, comprising:

• an off-axis hologram obtaining unit for recording the object image as the off-axis hologram by off-axis holography;
• a hologram converter for generating the complex amplitude in-line hologram from the off-axis hologram obtained by the off-axis hologram obtaining unit;
• and
• a storage unit for electronically recording the complex amplitude in-line hologram generated by the hologram converter as object image information, wherein
• the hologram converter includes:
• a modulation unit for performing spatial heterodyne modulation on the off-axis hologram, based on phase of an in-line reference light for reconstruction and phase of an off-axis reference light used for obtaining the off-axis hologram;
• and
• a filtering unit for performing spatial frequency filtering on the hologram modulated by the modulation unit, and wherein
• the image recording device generates the complex amplitude in-line hologram using the modulation unit and the filtering unit.

An image recording device for generating a complex amplitude in-line hologram from an off-axis hologram which records an object image so as to record the hologram electronically as object image information, comprising:

• an off-axis hologram obtaining unit for recording the object image as the off-axis hologram by off-axis holography;
• a hologram converter for generating the complex amplitude in-line hologram from the off-axis hologram obtained by the off-axis hologram obtaining unit;
• and
• a storage unit for electronically recording the complex amplitude in-line hologram generated by the hologram converter as object image information, wherein
• the hologram converter includes:
• a filtering unit for performing spatial frequency filtering on the off-axis hologram;
• and
• a modulation unit for performing spatial heterodyne modulation on the hologram filtered by the filtering unit, based on phase of an in-line reference light for reconstruction and phase of an off-axis reference light used for obtaining the off-axis hologram:
• the image recording device generates the complex amplitude in-line hologram using the modulation unit and the filtering unit.