HOLOGRAPHY REPRODUCING APPARATUS AND HOLOGRAPHY REPRODUCING METHOD

• US 20160033935A1
• Filed: 04/27/2015
• Published: 02/04/2016
• Est. Priority Date: 07/29/2014
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: LEE, Hongseok, SEO, Wontaek, KIM, Sunil
• Granted Patent: US 10,001,748 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G03H 1/2202 Reconstruction geometries or arrangements
• CPC Class Codes: G03H 1/2286 Particular reconstruction light G03H1/24 takes precedence; Beam properties
• CPC Class Codes: G03H 1/2294 Addressing the hologram to an active spatial light modulator
• CPC Class Codes: G03H 2001/0212 Light sources or light beam properties G03H1/06, G03H1/24 take precedence; corresponding details, see subgroups of G03H2222/00
• CPC Class Codes: G03H 2001/0224 Active addressable light modulator, i.e. Spatial Light Modulator [SLM]
• CPC Class Codes: G03H 2001/2234 Transmission reconstruction
• CPC Class Codes: G03H 2001/2236 Details of the viewing window
• CPC Class Codes: G03H 2001/2239 Enlarging the viewing window
• CPC Class Codes: G03H 2001/2242 Multiple viewing windows
• CPC Class Codes: G03H 2222/50 Geometrical property of the irradiating beam
• CPC Class Codes: G03H 2225/10 Shape or geometry
• CPC Class Codes: G03H 2225/60 Multiple SLMs

Abstract

A holography reproducing apparatus and a holography reproducing method are provided. The holography reproducing apparatus includes: a backlight configured to emit light, and a spatial light modulator configured to modulate light input from the backlight and transmit the modulated light to generate a transmissive hologram image, wherein at least one of a wave front of light emitted from the backlight and the spatial light modulator has a curved surface.

Claims

1. A holography reproducing apparatus comprising:

a backlight configured to emit light; and

a spatial light modulator configured to modulate light input from the backlight and transmit the modulated light to generate a transmissive hologram image,

wherein at least one of a wave front of light emitted from the backlight and the spatial light modulator has a curved surface.

2. The holography reproducing apparatus of claim 1, wherein the spatial light modulator has a curved surface.

3. The holography reproducing apparatus of claim 2, wherein the curved surface of the spatial light modulator has locally the same radius of curvature as a distance between the spatial light modulator and a coordinate plane just in front of an eye lens.

4. The holography reproducing apparatus of claim 3, wherein the curved surface of the spatial light modulator is a concave curved surface.

5. The holography reproducing apparatus of claim 4, wherein the spatial light modulator has a curved surface having a shape selected from a paraboloid, a hyperboloid, an ellipsoid, a parabola, a hyperbola, and an elliptic line.

6. The holography reproducing apparatus of claim 2, wherein the curved surface of the spatial light modulator has a shape selected from a paraboloid, a hyperboloid, an ellipsoid, a parabola, a hyperbola, and an elliptic line.

7. The holography reproducing apparatus of claim 1, wherein the backlight is further configured to emit non-plane wave light having a curved wave front locally with the same radius of curvature as a distance between the wave front and a coordinate plane just in front of an eye lens.

8. The holography reproducing apparatus of claim 7, wherein the backlight is further configured to emit non-plane wave light having a wave front that has a shape selected from a paraboloid, a hyperboloid, an ellipsoid, a parabola, a hyperbola, and an elliptic line.

9. The holography reproducing apparatus of claim 7, wherein the backlight is further configured to emit non-plane wave light having a concave curved wave front.

10. The holography reproducing apparatus of claim 1, wherein the backlight is further configured to emit coherent light.

11. The holography reproducing apparatus of claim 1, wherein the backlight is further configured to emit non-plane wave light having a curved wave front, and

wherein the spatial light modulator has a curved surface.

12. The holography reproducing apparatus of claim 11, wherein the curved wave front of the non-plane wave light emitted from the backlight and the curved surface of the spatial light modulator each have a shape selected from a paraboloid, a hyperboloid, an ellipsoid, a parabola, a hyperbola, and an elliptic line.

13. The holography reproducing apparatus of claim 12, wherein the curved wave front of the non-plane wave light emitted from the backlight and the curved surface of the spatial light modulator are concave curved surfaces.

14. A holography reproducing method comprising:

generating computer generated hologram (CGH) data for reproducing a desired hologram image when at least one of a wave front of light emitted from a backlight and a spatial light modulator that modulates light input from the backlight and transmits the modulated light to generate a transmissive hologram image has a curved surface; and

reproducing the transmissive hologram image by modulating light incident on the spatial light modulator, based on the generated CGH data.

15. The holography reproducing method of claim 14, wherein the generating of the CGH data comprises generating a signal for controlling the spatial light modulator to reproduce a desired hologram image when the spatial light modulator has a curved surface.

16. The holography reproducing method of claim 15, wherein the generating of the CGH data comprises generating a signal for controlling the spatial light modulator to reproduce a desired hologram image when the curved surface of the spatial light modulator has locally the same radius of curvature as a distance between the spatial light modulator and a coordinate plane just in front of an eye lens.

17. The holography reproducing method of claim 16, wherein the generating of the CGH data comprises generating a signal for controlling the spatial light modulator to reproduce a desired hologram image when the curved surface of the spatial light modulator is a concave curved surface.

18. The holography reproducing method of claim 17, wherein the generating of the CGH data comprises generating a signal for controlling the spatial light modulator to reproduce a desired hologram image when the curved surface of the spatial light modulator has a shape selected from a paraboloid, a hyperboloid, an ellipsoid, a parabola, a hyperbola, and an elliptic line.

19. A holographic display apparatus comprising:

a backlight configured to emit coherent light;

a controller configured to generate data to reproduce a desired hologram image; and

a curved spatial light modulator configured to modulate the coherent light and transmit the modulated light to render the desired hologram image, based on the generated data.

20. The holographic display apparatus of claim 19, wherein the curved spatial light modulator has locally the same radius of curvature as a distance between the spatial light modulator and a coordinate plane just in front of an eye lens.