Color hologram display and its fabrication process

• US 7,710,622 B2
• Filed: 11/23/2005
• Issued: 05/04/2010
• Est. Priority Date: 04/12/1999
• Status: Expired due to Term

• Current Assignee: Dai Nippon Printing Company Limited
• Original Assignee: Dai Nippon Printing Company Limited
• Inventors: Takabayashi, Emi, Kodoma, Daijiro, Watanabe, Masachika
• Primary Examiner(s): Chang; Audrey Y
• Application Number:
  US11/285,950
• Publication Number:
  US 20060072178A1
• Time in Patent Office: 1,623 Days
• Field of Search: 359/24, 359/28, 359/30, 359/12, 359/22, 359/25, 359/2, 359/15, 283/86, 430/1
• US Class Current: 359/12
• CPC Class Codes: G03H 1/0248 Volume holograms
• CPC Class Codes: G03H 1/181 Pre-exposure processing, e.g. hypersensitisation
• CPC Class Codes: G03H 1/202 Contact copy when the reconstruction beam for the master H1 also serves as reference beam for the copy H2
• CPC Class Codes: G03H 1/2249 Holobject properties
• CPC Class Codes: G03H 1/24 using white light , e.g. rainbow holograms
• CPC Class Codes: G03H 1/26 Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
• CPC Class Codes: G03H 1/28 superimposed holograms only
• CPC Class Codes: G03H 2001/0417 for recording single beam Lippmann hologram wherein the object is illuminated by reference beam passing through the recording material
• CPC Class Codes: G03H 2001/187 Trimming process, i.e. macroscopically patterning the hologram
• CPC Class Codes: G03H 2001/2231 Reflection reconstruction
• CPC Class Codes: G03H 2001/2257 Straddling the hologram
• CPC Class Codes: G03H 2001/2263 Multicoloured holobject
• CPC Class Codes: G03H 2001/2271 RGB holobject
• CPC Class Codes: G03H 2001/2278 Orthoscopic or pseudoscopic
• CPC Class Codes: G03H 2001/2281 Particular depth of field
• CPC Class Codes: G03H 2001/2615 in physical contact, i.e. layered holograms
• CPC Class Codes: G03H 2210/32 3D+2D, i.e. composition of 3D and 2D sub-objects, e.g. scene in front of planar background
• CPC Class Codes: G03H 2210/33 3D/2D, i.e. the object is formed of stratified 2D planes, e.g. tomographic data
• CPC Class Codes: G03H 2210/36 Occluded features resolved due to parallax selectivity
• CPC Class Codes: G03H 2210/562 Holographic object, i.e. a combination of an object and holobject G03H1/20 takes precedence
• CPC Class Codes: G03H 2222/18 : RGB trichrome light
• CPC Class Codes: G03H 2223/12 : Amplitude mask, e.g. diaphragm, Louver filter
• CPC Class Codes: G03H 2223/14 : Diffuser, e.g. lens array, random phase mask
• CPC Class Codes: G03H 2260/12 : Photopolymer

Abstract

The invention relates to a color hologram display an image of a three-dimensional object and a hologram image of a pattern of plane characters, images or the like are recorded in the same volume type hologram photosensitive material in a superposed or multiplexed fashion. A color hologram display 27′ comprising a combined reflection and volume type of single layer, wherein a color pattern 29g of plane characters, images or the like and a color three-dimensional subject image O″ are reconstructably recorded while spatially superposed one upon another.

Claims

1. A process of fabricating a color hologram display, comprising recording a color three-dimensional subject image and a color pattern of plane characters or images as hologram images by exposing a subject hologram plate for forming the color three-dimensional subject image and a character hologram plate for reconstructing the color pattern of plane characters or images, where the two plates are separately made, said subject hologram plate and said character hologram plate are spatially positioned with a given space located there between, and diffracted lights from said subject hologram plate and said character hologram plate are simultaneously entered in a same photosensitive material to record interference patterns for the images and reconstructed pattern of said subject and character hologram plates, with exposing light, as hologram images.

2. The color hologram display fabrication process according to claim 1, wherein an area of a hologram photosensitive material other than a portion thereof corresponding to said color pattern of plane characters or images of the character hologram plate is deactivated by photosensitization, and a reflection type hologram of a scatter plate is then recorded in said portion of said hologram photosensitive material to make said color hologram display.

3. The color hologram display fabrication process according to claim 2, wherein said subject hologram plate is recorded in three colors, red, green and blue and said character hologram plate is recorded in any one of red, green and blue.

4. The color hologram display fabrication process according to claim 3, wherein said character hologram plate is recorded in green.

5. The color hologram display fabrication process according to claim 1, wherein said color three-dimensional subject image is recorded in a subject hologram plate, said subject hologram plate is recorded in three colors, red, green and blue and said color pattern of plane characters or images is recorded in a character plate, said character hologram plate is recorded in any one of red, green and blue.

6. The color hologram display fabrication process according to claim 5, wherein said character hologram plate is recorded in green.

7. A process of fabricating a color hologram display as recited in claim 1, comprising the steps of employing a subject hologram plate for forming a color three-dimensional subject image and a character hologram plate for reconstructing a color pattern image of plane characters or images, wherein said subject hologram plate and said character hologram plate are separately made, superposing said subject hologram plate and said character hologram plate one upon another, and providing diffracted light from said subject hologram plate and said character hologram plate to simultaneously enter in the same photosensitive material to record said color three-dimensional subject image and said color pattern image of plane characters or images as hologram images.

8. The color hologram display fabrication process according to claim 1, wherein said subject hologram plate is recorded in three colors, red, green and blue and said character hologram plate is recorded in any one of red, green and blue.

9. The color hologram display fabrication process according to claim 8, wherein said character hologram plate is recorded in green.

10. A process of fabricating a color hologram display, comprising recording a color three-dimensional subject image and a color pattern of plane characters or images as hologram images by exposing a character hologram plate for reconstructing said color pattern of plane characters or images, said character hologram plate is located in front of a color three-dimensional subject, and diffracted light from said character hologram plate and scattered light from said color three-dimensional subject are simultaneously entered in the same photosensitive material to record interference patterns for the subject image and reconstructed pattern of said character hologram plates, with exposing light, as hologram images.

11. A color hologram display comprising a combined reflection type hologram and volume type hologram, said volume type hologram being of single layer or multilayer photosensitive layer construction, wherein a color pattern of plane characters or images and a color three-dimensional subject image are reconstructably recorded therein while spatially superposed one upon another, wherein any shadow of said color pattern of plane characters or images is unrecorded, fabricated by the process of claim 10.

12. A hologram plate used to fabricate a color hologram display, comprising a photosensitive material, a color three-dimensional subject image and a color pattern image of plane characters or images, wherein a subject hologram plate for forming the color three-dimensional subject image and a character hologram plate for reconstructing the color pattern image of plane characters or images are separately made, said subject hologram plate and said character hologram plate are positioned with a given space located therebetween, and diffracted light from said subject hologram plate and said character hologram plate is simultaneously entered in said photosensitive material to record said color three-dimensional subject image and said color pattern image of plane characters or images as hologram images.

13. The hologram plate according to claim 12, wherein an angle of incidence of light employed to produce said diffracted light from said subject hologram plate and said character hologram plate is equal.

14. A hologram plate used to fabricate a color hologram display, comprising a photosensitive material, a color three-dimensional subject image and a color pattern image of plane characters or images, wherein a subject hologram plate for forming the color three-dimensional subject image and a character hologram plate for reconstructing the color pattern image of plane characters or images are separately made, said subject hologram plate and said character hologram plate are superposed one upon another, and diffracted light from said subject hologram plate and said character hologram plate is simultaneously entered in said photosensitive material to record said color three-dimensional subject image and said color pattern image of plane characters or images as hologram images.

15. The hologram plate according to claim 14, wherein an angle of incidence of light employed to produce said diffracted light from said subject hologram plate and said character hologram plate is equal.