Computer hologram and creation method thereof

Details Computer hologram and creation method thereof Computer hologram and creation method thereof

2005-01-25

2009-08-11

Amari, Alessandro (Department: 2872)

Optical: systems and elements

Holographic system or element

For synthetically generating a hologram

Reexamination Certificate

active

07573622

ABSTRACT:
An original image (10), a recording surface (20), and a reference light (R) are defined and a large number of calculation points (Q(x, y)) are defined at a predetermined pitch on the recording surface (20). For each of the calculation points, intensity of interference wave, formed by an object light (O1to ON) generated from the respective parts (P1to PN) of the original image (10) and a reference light (R), is calculated. A binary pattern defined by dividing a unit area into a first area having a pixel value “white” and a second area having a pixel value “black” is defined in a plurality of ways by changing the occupancy ratio (0 to 100%) of the first area. A binary pattern having the occupancy ratio corresponding to the interference wave intensity calculated, is assigned to the position of the respective calculation points (Q) on the recording surface (20) so as to form a binary image and create a computer hologram medium having convex and concave portions. By setting the vertical and horizontal pitched of the calculation points (Q) to 400 nm or below, it is possible to reduce the unnecessary noise component generated during observation and obtain a clear reproduction area.

REFERENCES:
patent: 6618190 (2003-09-01), Kitamura et al.
patent: 6934074 (2005-08-01), Kitamura et al.
patent: 2002/0027702 (2002-03-01), Kitamura et al.
patent: 2000-214750 (2000-08-01), None
patent: 2002-72837 (2002-03-01), None
patent: 2002-72838 (2002-03-01), None

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