JP2000162951A - Method and device for copying hologram - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a method and a device for copying a hologram by which inspection can be performed simultaneously with the copying process of the hologram. SOLUTION: As to the copying of the hologram in which one surface of a photosensitive material film is stuck to a hologram original plate to be copied while the photosensitive material film is supplied, in which the film is irradiated with light from a photosensitive material film side or an opposite side, next, the stuck film is peeled from the hologram original plate to be copied, and in which the peeled film 5 is irradiated with an ultraviolet ray 49, then taken up; the surface of the copied hologram is illuminated by an illuminating light source 11, the image of the hologram is picked up by a CCD camera 12, and the image of a film surface obtained by the camera 12 is inputted in a personal computer 13 provided with an image analyzing program, so that the dispersion of the color, the void, and wrinkle, etc., of the copied hologram can be inspected by image analization.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for duplicating a hologram, and more particularly to a method and an apparatus for inspecting a hologram reproduced or photographed from a hologram master and a hologram subject master.

[0002]

2. Description of the Related Art The present applicant has proposed a hologram duplication method in Japanese Patent Application No. 6-129005. This method
While supplying the photosensitive material film in which both surfaces of the photosensitive material are sandwiched by the support film, the support film on one surface is peeled off, the peeled surface is directed to the hologram master to be copied, and the photosensitive material film is rolled from the opposite side with a roller. Paste the hologram master to be copied sequentially while squeezing, irradiate light from the photosensitive material film side or the opposite side, then peel off from one end sequentially while holding down the photosensitive material film stuck from the replica hologram master with a roller, and peel This is a hologram duplication method in which a protective film is sequentially attached to the peeled surface of the photosensitive material film, and then the photosensitive material film is wound.

FIG. 2A shows an apparatus for this purpose. This apparatus is for performing hologram duplication from the hologram master 35 to the holographic recording film 1.
As shown in FIG. 1B, a holographic recording film 1 having a three-layer structure of a support film 3, a photosensitive material 2, and a support film 4 is used as the photosensitive material film 1 for duplication. Here, the photosensitive material 2 is a hologram master 3
5 is a photosensitive material made of a photopolymer for replicating a volume hologram. Further, as the protective film 50, as shown in the cross section in FIG. 4B, PET (polyethylene terephthalate) 51 / optical adhesive 52 / PET
A protective film made of 53 is used.

In this apparatus, first, the film 1 sent out from the unwinding roller 31 on which the photosensitive material film 1 for copying is set is cleaned through a cleaner roller 44 constituting one nip roller, and is then cleaned by another nip. The support film 3 on one side is peeled off by the support film peeling roller 32 constituting a roller. The separated support film 3 is taken up by a take-up roller 33. On the other hand, the film 1 with the exposed photosensitive material 2
Is moved while pressing the pressure roller 37 from the position slightly deviated to the right from the left end of the original 35 to the right of the figure, and is released to the upper left slightly before the right end of the original 35.
Is laminated on the central area of the glass plate.

Next, a refractive index matching liquid (index matching liquid) is applied on the film 1 laminated on the original 35.
Is dropped, and an anti-reflection coated glass 34 is put thereon.

Thereafter, by projecting and exposing ultraviolet light 46 from an ultra high pressure mercury lamp (not shown) through the chrome trimming mask 36, only the central portion of the laminated area of the photosensitive material 2 is shielded, and the other peripheral portions are exposed. Photosensitivity is lost, and trimming (masking) is performed.

Next, a laser beam 47 conjugate to that at the time of the original photographing is used.
Is irradiated onto the original 35 from the film 1 side to perform duplication.

After the above exposure, the antireflection coated glass 34 is peeled off from the film 1 and the refractive index matching liquid is cleaned.
The remaining refractive index matching liquid is dried with heated air.

Next, the copy film 1 is peeled off by moving the copy film peeling roller 37 also serving as a pressure roller while pressing it toward the left side of the figure, and the film 1 is added by one frame. Send out the length. At this time, the protective film 50 with the adhesive layer 52 is attached to the duplicated film 1 on the side of the photosensitive material 2 by the laminating roller 38 constituting another nip roller. On this occasion,
Protective film 50 supplied from unwind roller 40
Cover sheet 51 is peeled off by the peeling roller 39,
It is taken up by the take-up roller 41.

The duplicate film 1 with the protective film 50 attached thereto enters the ultraviolet irradiator 42 via another nip roller 54 for conveyance and the like, and is exposed to ultraviolet light 49 from an unshown ultra-high pressure mercury lamp, and then wound. It is wound up by the take-up roller 43. In order to remove static electricity generated by the peeling rollers 32 and 39, antistatic devices 45 are attached to respective positions.

[0011]

In such a duplicating method and apparatus, the hologram duplicated from the original 35 does not reproduce an image of a desired color and has a specific color, wrinkles and blank defects. May occur.

Conventionally, such a defective product is inspected by using a method shown in FIG.
(A) Since the product once wound up by the take-up roller 43 was inspected visually or the like while being unwound in another process, it takes time for inspection, and it takes time between unwinding and re-winding. Defects such as wrinkles can occur.

The present invention has been made in view of such problems of the prior art, and an object of the present invention is to provide a hologram duplicating method and apparatus in which inspection is performed simultaneously in a hologram duplicating process. .

[0014]

According to the present invention, there is provided a method for duplicating a hologram, wherein one side of the hologram is adhered to a hologram to be duplicated while a photosensitive material film is supplied.
Irradiate light from the photosensitive material film side or the opposite side, then peel off the photosensitive material film attached from the hologram master to be copied, in the hologram replication method of winding up after irradiating the peeled photosensitive material film with ultraviolet light A method of capturing an image of a film surface between an ultraviolet irradiation position and a winding position, and inspecting a hologram copied by image analysis.

Further, the hologram duplication apparatus of the present invention comprises:
While supplying the photosensitive material film, one surface thereof is attached to the hologram master to be copied, light is irradiated from the photosensitive material film side or the opposite side, and then the photosensitive material film attached from the hologram master to be copied is peeled and peeled. In a hologram duplicator that winds the photosensitive material film after irradiating it with ultraviolet light, an illumination light source and a CCD camera are arranged between the ultraviolet irradiation position and the winding position, and an image of the film surface obtained from the CCD camera is taken. It is characterized by being connected so as to input to a personal computer having an image analysis program.

In this case, it is desirable to use a halogen lamp as the illumination light source.

In the present invention, an image of the film surface is picked up between the ultraviolet irradiation position and the winding position, and the hologram duplicated by the image analysis is inspected. In addition, it is possible to inspect whether or not the overall color is a predetermined color in the same process as the duplication, and an extra time for the inspection and an extra process of rewinding and rewinding the duplicate are required. It is not required and there is no danger of defects such as wrinkles resulting from such extra inspection steps.
Further, the throughput is improved by feeding back the inspection result to the copying unit.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a hologram duplication method and apparatus according to the present invention will be described. FIG. 1 shows the configuration of a hologram duplication apparatus according to one embodiment of the present invention. However, in this figure, the device simply indicated by a box as the duplication device 10 indicates the hologram duplication unit on the left side of the line AA ′ in FIG. In this apparatus, a hologram is duplicated from the hologram master 35 in the duplication device 10 and a protective film 53 is adhered to the duplicate film (FIG. 2B).
After being fixed by applying ultraviolet light 49, it is wound up by the winding roller 43. In the present invention, after being fixed by the ultraviolet light 49 and before being wound on the winding roller 43, the duplicate film is illuminated with light from the halogen lamp 11, and the illuminated film surface is moved to the CCD camera 12.
The image can be picked up. CCD camera 1
2 is input to the personal computer 13. A general-purpose image analysis program is installed in the personal computer 13, and the CCD camera 12 is used by the image analysis program.
In addition to detecting wrinkles, blanks (white defects), and the like in the captured image, the variation in color of the image can be detected.

Therefore, the hologram is duplicated from the hologram master 35 in the duplication device 10 and the protective film 5 is copied.
3 can be inspected in the same process as the duplication to determine whether the hologram of each frame of the duplicated film has no defects such as wrinkles and blanks, and whether or not the overall color is a predetermined one.
Extra time for inspection and rewinding of duplicates
No extra winding step is required, and there is no danger of defects such as wrinkles being caused by such extra inspection step. Further, by feeding back the inspection result to the duplication apparatus 10, duplication throughput is also improved.

As a result of the inspection, a frame detected as having a defect is indicated by a personal computer 13 together with a frame number entered in the margin.
A void symbol or the like is recorded in the frame, or a frame having a defect in a subsequent process is used for discarding the frame based on the information.

Although the hologram duplication method and apparatus of the present invention have been described based on the embodiments, the present invention is not limited to these embodiments, and various modifications are possible.

[0022]

As is apparent from the above description, according to the hologram duplication method and apparatus of the present invention, an image of the film surface is picked up between the ultraviolet irradiation position and the winding position, and the hologram is copied by image analysis. Inspected holograms
Each frame can be inspected for defects such as blanks, and whether or not the overall tint is a predetermined one can be inspected in the same process as the duplication,
Extra time for inspection and rewinding of duplicates
No extra winding step is required, and there is no danger of defects such as wrinkles being caused by such extra inspection step. Further, the throughput is improved by feeding back the inspection result to the copying unit.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a hologram duplication device according to one embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a hologram duplication device on the premise of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Holographic recording film 2 ... Photosensitive material 3 ... Support film 4 ... Support film 10 ... Reproduction device 11 ... Halogen lamp 12 ... CCD camera 13 ... PC 31 ... Unwind roller 32 ... Support film peeling roller 33 ... Wound Take-up roller 34 ... Non-reflection coated glass 35 ... Hologram master 36 ... Chrome trimming mask 37 ... Compression roller (peeling roller) 38 ... Laminating roller 39 ... Peeling roller 40 ... Unwinding roller 41 ... Winding roller 42 ... UV irradiator 43 ... Winding roller 44 Cleaner roller 45 Antistatic device 46 Ultraviolet light 47 Laser light 49 Ultraviolet light 50 Protective film 51 PET (cover sheet) 52 Optical adhesive 53 PET (protective film) 54 Nip Roller … Duplicate film

Claims (3)

[Claims] 1. A photosensitive material film is supplied and one side thereof is attached to a hologram to be copied, light is irradiated from the photosensitive material film side or the opposite side, and then the photosensitive material film attached from the hologram to be copied is removed. Peeling, in the method of copying a hologram to be wound after irradiating the peeled photosensitive material film with ultraviolet light, an image of the film surface is captured between the ultraviolet irradiation position and the winding position,
A hologram duplication method, wherein the hologram duplicated by the image analysis is inspected. 2. A photosensitive material film is supplied, one surface of which is attached to a hologram to be copied, light is irradiated from the photosensitive material film side or the opposite side, and then the photosensitive material film attached from the hologram to be copied is removed. In a hologram duplicator that peels and irradiates the peeled photosensitive material film with ultraviolet light and winds the film, an illumination light source and a CCD camera are arranged between the ultraviolet irradiation position and the winding position, and the obtained hologram is obtained from the CCD camera. A hologram duplication device, which is connected to input an image of a film surface to a personal computer having an image analysis program. 3. The hologram duplication apparatus according to claim 2, wherein a halogen lamp is used as said illumination light source.