Patent ID: 7706038

Claim:
Method for manufacturing a hologram recording medium that has an arrangement by which different original images are reproduced when observed from different positions, the hologram recording medium manufacturing method comprising: an original image preparation step of preparing a plurality N of original images, each as a set of unit light sources positioned in a three-dimensional coordinate system; a propagation space definition step of defining a plurality N of propagation spaces, enabling propagation of light emitted from a reference unit light source, based on a position of the reference unit light source; a recording plane setting step of setting a predetermined recording plane in the three-dimensional coordinate system; a reference light setting step of setting a predetermined reference light in the three-dimensional coordinate system; a pattern computation step of computing an interference fringe pattern, formed on the recording plane, based on object light components, emitted from the individual unit light sources constituting the respective original images, and the reference light; and a pattern forming step of forming the interference fringe pattern on a physical medium; and wherein in the pattern computation step, a computation is performed upon deeming that an object light from a unit light source belonging to an i-th (i=1, 2, . . . , N) original image propagates only within an i-th (i=1, 2, . . . , N) propagation space, with a position of the unit light source being set as a position of the reference unit light source.