Abstract:
A method for producing and replaying a composite color hologram, the method comprising recording a first hologram containing primarily a green content of an intended composite hologram using a substantially collimated recording reference beam, recording a second hologram containing primarily a blue content of the intended composite hologram using a substantially collimated recording reference beam, recording a third hologram containing primarily a red content of the intended composite hologram, transmitting, using a first filter, at least a portion of wavelengths close to Ar at a broad range of angles about an intended viewing angle of the intended composite hologram, blocking, using the first filter, at least a portion of wavelengths close to Ar at angles close to Or, transmitting, using the first filter, at least a portion of wavelengths close to Ab only at angles close to Ob and/or Ag only at angles close to Og
Abstract:
There is provided a user interface for a portable electronic apparatus, the user interface comprising a holographic image provider (100) for use in providing a at least one holographic image (110, 120) by edge-lighting, the holographic image provider comprising a at least one holographic image, the at least one holographic image selectively viewable as a user interface icon (115, 125) by using at least one respective reconstruction beam (140a, 140b).
Abstract:
A holographic printer is disclosed which produces an intermediate hologram H3 and uses the intermediate hologram H3 to produce a white light viewable hologram H2.
Abstract:
A holographic sight (20) which includes a base (24) having at least one connector (25) for mounting the base (24) on a small arm (22), and a hologram (30) of a reticle pattern, a compact laser light source (32) for illuminating the hologram (30), and a power source (38) for the laser diode (32), each mounted on the base (24). The sight (20) also includes an achromatizer (36) supported in the path of the light beam for reducing shifts in the position of the reticle pattern due to variations in the wavelength of the light beam emitted from the laser diode (32). The sight (20) may further include means for circularizing the elliptical beam emitted from the laser diode (32) to provide a uniform illumination pattern for the hologram (30). A brightness adjuster (44) and position adjuster (40), for varying the brightness and relative position of the reticle, respectively, may also be provided.
Abstract:
The exposure component (10) of a photo-etching system for a semiconductor wafer (28) includes a laser (12) that shines coherent light through an expansion lens (14) and then a contraction lens (16) to supply a spherically convergent beam of light through a lensless-Fourier-transform hologram (22) and onto the semiconductor wafer (28). The wafer (28) is located tangent to a hemisphere centered on the hologram (22) that has the focal point (26) of the convergent spherical beam at the middle of its curved surface. This forms a reduced version of the source image from which the hologram (22) was formed and achieves feature sizes significantly smaller than those attainable with conventional mask-type systems employing light of the same wavelength.