Hologram sheet and hologram observation sheet using same, and blinding device

• US 20070070477A1
• Filed: 06/29/2006
• Published: 03/29/2007
• Est. Priority Date: 07/04/2005
• Status: Active Grant

• Current Assignee: Dai Nippon Printing Company Limited
• Original Assignee: Dai Nippon Printing Company Limited
• Inventors: Watanabe, Masachika, Oyagi, Yasuyuki, Kitamura, Mitsuru, Eto, Koji
• Granted Patent: US 8,941,904 B2
• Time in Patent Office: Days
• US Class Current: 359/12
• CPC Class Codes: G03H 1/0005 Adaptation of holography to specific applications holographic optical element G02B5/32; holographic scanner G02B26/106; recognition using holographic mask G06V10/88; holographic memories G11B7/0065, G11C13/042
• CPC Class Codes: G03H 1/0244 Surface relief holograms replicating hologram without interference recording G03H1/0276
• CPC Class Codes: G03H 1/16 using Fourier transform G03H1/10, G03H1/12, G03H1/14 take precedence; analogue computers G06G, e.g. G06G7/19
• CPC Class Codes: G03H 1/2249 Holobject properties
• CPC Class Codes: G03H 2001/0055 in advertising or decorative art
• CPC Class Codes: G03H 2001/2234 Transmission reconstruction
• CPC Class Codes: G03H 2001/306 Tiled identical sub-holograms
• CPC Class Codes: G03H 2210/20 2D object
• CPC Class Codes: G03H 2223/12 Amplitude mask, e.g. diaphragm, Louver filter
• CPC Class Codes: G03H 2250/10 arranged to be transferred onto a carrier body

Abstract

A main object of the present invention is to provide a hologram observation sheet with a transmission type hologram formed integrally with other members, to be attached with various members for the use as for example an advertising medium or a decoration member. To achieve the object, the invention provides a hologram sheet comprising: a transparent substrate, a hologram layer formed on the transparent substrate and having a transmission type Fourier transform hologram region having the function of transforming a light beam incident from a point light source to a desired optical image, and a pressure-sensitive adhesive layer.

Claims

1. A hologram sheet comprising:

a transparent substrate;

a hologram layer formed on the transparent substrate and having a transmission type Fourier transform hologram region with a function of transforming a light beam incident from a point light source to a desired optical image; and

a pressure-sensitive adhesive layer.

2. A hologram observation sheet using the hologram sheet according to claim 1, wherein the hologram layer is an image transforming layer comprising

the transmission type Fourier transform hologram region, and

a non hologram region which is other than the transmission type Fourier transform hologram region and without the function;

and the pressure-sensitive adhesive layer is formed on a surface of the transparent substrate which is an opposite side of a side with the image transforming layer formed, or

the non hologram region of the image transforming layer.

3. The hologram observation sheet according to claim 2, wherein a self supporting property substrate is formed:

between the transparent substrate and the pressure-sensitive adhesive layer in the case the pressure-sensitive adhesive layer is formed on the surface of the transparent substrate which is the opposite to the side with the image transforming layer formed, or

between the non hologram region and the pressure-sensitive adhesive layer in the case the pressure-sensitive adhesive layer is formed on the non hologram region of the image transforming layer.

4. The hologram observation sheet using the hologram sheet according to claim 1, wherein the hologram layer is an image transforming layer comprising;

the transmission type Fourier transform hologram region, and

a non hologram region which is other than the transmission type Fourier transform hologram region and without the function;

a protection layer is formed on the transmission type Fourier transform hologram region of the image transforming layer; and

the pressure-sensitive adhesive layer is formed on the protection layer.

5. The hologram observation sheet according to claim 4, wherein a self supporting property substrate is formed between the protection layer and the pressure-sensitive adhesive layer.

6. The hologram observation sheet according to claim 2, wherein the pressure-sensitive adhesive layer is an adhesive layer having a sticky property, or a re-peelable adhesive layer having both characteristics of an adhesive property and a re-peelable property.

7. The hologram observation sheet according to claim 4, wherein the pressure-sensitive adhesive layer is an adhesive layer having a sticky property, or a re-peelable adhesive layer having both characteristics of an adhesive property and a re-peelable property.

8. The hologram observation sheet according to claim 2, wherein a printing layer is formed on the transparent substrate.

9. The hologram observation sheet according to claim 4, wherein a printing layer is formed on the transparent substrate.

10. The hologram observation sheet according to claim 2, wherein a release substrate is disposed on the pressure-sensitive adhesive layer.

11. The hologram observation sheet according to claim 4, wherein a release substrate is disposed on the pressure-sensitive adhesive layer.

12. The hologram observation sheet according to claim 2, wherein the image transforming layer is a surface phase type diffractive-optical element layer having a concavo-convex structure on a surface of the transmission type Fourier transform hologram region.

13. The hologram observation sheet according to claim 4, wherein the image transforming layer is a surface phase type diffractive-optical element layer having a concavo-convex structure on a surface of the transmission type Fourier transform hologram region.

14. A blinding device not showing a transmitted background sharply and using the hologram sheet according to claim 1.

15. The blinding device according to claim 14, wherein the hologram layer is provided as a phase type computer generated hologram.

16. The blinding device according to claim 14, wherein the hologram sheet is attached to a window.

17. The blinding device according to claim 14, wherein the hologram sheet is sandwiched between windows comprising two transparent plates.

18. The blinding device according to claim 14, wherein the hologram sheet is of a sliding system capable of covering a window for allowing comings and goings.

19. The blinding device according to claim 14, wherein the hologram sheet is a roll screen system capable of covering a window for allowing comings and goings.

20. The blinding device according to claim 14, wherein the hologram layer is of a 20 μ

m pitch or less.

21. A production method for a blinding device, wherein the blinding device not showing a transmitted background sharply and having a Fourier transform hologram, comprises a step of producing the Fourier transform hologram for transforming a point light source to a desired pattern by copying an original master using a stamper.

22. A production method for a blinding device, wherein the blinding device not showing a transmitted background sharply and having a Fourier transform hologram, comprises a step of producing the Fourier transform hologram for transforming a point light source to a desired pattern by copying an original master to a UV resin.

23. A production method for a blinding device, wherein the blinding device not showing a transmitted background sharply and having a Fourier transform hologram, comprises a step of producing the Fourier transform hologram for transforming a point light source to desired character information or graphic information by exposing a Fourier transform image provided by Fourier transforming an original image with a step-and-repeat.