Back to results
US 6,757,087 B1Granted
Optical display
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsYoshinao Taketomi, Toshihiro Kubota, Yoshihiko Tanji, Zenrou Hayashi
Life of this patent
Estimating the term…
Abstract
An optical display provided with a hologram element and a light source, wherein the hologram is a reflection hologram formed by a light beam which is obtained by utilizing light passing through a slit and has information on an object and a reference light beam which has an incident ligth path different from that of the light having the information on an object, and the reproduced image of the object is displayed using the light from the light source.
Claims26
An optical display apparatus, comprising a hologram device and a light source,
- wherein the hologram device is a reflection-type hologram formed by:
- light having information of an object incident on a first side of a first hologram dry plate;
- and
- reference light incident on a second side of the first hologram dry plate, the second side of the first hologram dry plate being opposite the first side of the first hologram dry plate, the reference light and the light having the information of the object being arranged to interfere with each other on the first hologram dry plate,
- wherein a reconstructed image of the object is displayed by light from the light source which is incident on the reflection-type hologram through an elongated opening which is elongated in the length or depth direction with respect to a viewer but not substantially elongated in the width direction with respect to a viewer, such that the visible zone of the reflection-type hologram is lengthened without blurring, and
- wherein the light having the information of the object is obtained by reconstructing a transmission-type hologram which is formed by:
- object light incident on a second hologram dry plate, said object light obtained by irradiating the object which is positioned between a slit and the second hologram dry plate;
- and interfering with a second radiation light incident on the second hologram dry plate with an incident optical path different from that of the object light.
5 more elements
An optical display apparatus, comprising a hologram device and a light source,
- wherein the hologram device is a reflection-type hologram formed by:
- light having information of an object incident on a first side of a first hologram dry plate;
- and
- reference light incident on a second side of the first hologram dry plate, the second side of the first hologram dry plate being opposite the first side of the first hologram dry plate, the reference light and the light having the information of the object being arranged to interfere with each other on the first hologram dry plate,
- wherein a reconstructed image of the object is displayed by light from the light source which is incident on the reflection-type hologram through an elongated opening which is elongated in the length or depth direction with respect to a viewer but not substantially elongated in the width direction with respect to a viewer, such that the visible zone of the reflection-type hologram is lengthened without blurring, and
- wherein the light having the information of the object is obtained by reconstructing a transmission-type hologram through a slit adjacent to the transmission-type hologram on which an image of the object is recorded.
3 more elements
An optical display apparatus, comprising a hologram device and a light source,
- wherein the hologram device is a reflection-type hologram formed by:
- light having information of an object incident on a first side of a first hologram dry plate;
- and
- reference light incident on a second side of the first hologram dry plate, the second side of the first hologram dry plate being opposite the first side of the first hologram dry plate, the reference light and the light having the information of the object being arranged to intercept with each other on the first hologram dry plate,
- wherein a reconstructed image of the object is displayed by light from the light source which is incident on the reflection-type hologram through an elongated opening which is elongated in the length or depth direction with respect to a viewer but not substantially elongated in the width direction with respect to a viewer, such that the visible zone of the reflection-type hologram is lengthened without blurring, and
- wherein the light having the information of the object is obtained by reconstructing a transmission-type hologram through a slit having an aperture adjacent to the transmission-type hologram on which an image of the object is recorded;
- and a cylindrical lens having its generatrix along a longitudinal direction of the aperture of the slit.
4 more elements
An optical display apparatus, comprising a hologram device and a light source,
- wherein the hologram device is a reflection-type hologram formed by:
- light having information of an object incident on a first side of a first hologram dry plate;
- and
- reference light incident on a second side of the first hologram dry plate, the second side of the first hologram dry plate being opposite the first side of the first hologram dry plate, the reference light and the light having the information of the object being arranged to interfere with each other on the first hologram dry plate, and
- wherein a reconstructed image of the object is displayed by light from the light source which is incident on the reflection-type hologram through an elongated opening which is elongated in the length or depth direction with respect to a viewer but not substantially elongated in the width direction with respect to a viewer, such that the visible zone of the reflection-type hologram is lengthened without blurring.
2 more elements
Dependencies are inferred from the claim text.