JPH06274088A - Supporting structure for hologram original plate - Google Patents

Abstract

PURPOSE:To provide the supporting structure for a hologram original plate which can withstand long-term use and has extremely high reliability by making it possible for the hologram original plate to come into complete tight contact with a rotary drum over the entire surface. CONSTITUTION:This supporting structure for the hologram original plate has two sheets of film retaining plates 18 which are provided with slit-shaped lancing parts 17 in the direction parallel with a revolving shaft on the surface of the rotary drum, exist in the rotary drum, have the length nearly equal to the width of the rotary drum and are parallel with the revolving shaft, a pair of clamping plates 19 which have these film retaining plates 18 at the front ends and are intersected with each other at a moving fulcrum, fixtures which are fixed to the inner peripheries of the lancing parts 17 of the rotary drum and one set of moving fittings 21 which are turnably connected to the top parts of these fixtures on the surface of the rotary drum. These moving fittings 21 are fixed at one end to the inside of the rotary drum by means of springs 22 and are turnably connected at the other end to the terminals of the clamping plates 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in a method for mass-producing a Lippmann hologram using a rotating drum.
The present invention relates to a hologram original support structure for a duplication device.

[0002]

2. Description of the Related Art Conventionally, when replicating a Lippmann hologram using a rotary drum, the following methods have been used as a method for attaching a hologram master plate to the rotary drum. This is a method in which both ends of the original plate in the rotating direction are fixed to a rotating drum using an adhesive tape.

As another method used for attaching another hologram original plate to the rotary drum, a groove is provided in the rotary drum, and the hologram original plate is sandwiched by a metal fitting in the groove portion and screwed to fix the hologram original plate. The original hologram was fixed on the rotating drum.

However, the above-mentioned conventional technique has the following problems. That is, when fixing the hologram master to the rotating drum, in order to prevent irregular reflection of laser light by the layer of air in the gap between the hologram master and the rotating drum,
Since it is necessary to fix while dropping an appropriate amount of index matching liquid between the hologram master plate and the rotating drum, in the method using adhesive tape or double-sided adhesive tape, the dropped index matching liquid rotates the hologram master plate. The problem is that it adheres near both ends of the direction, impairs the adhesiveness of the adhesive tape or double-sided adhesive tape, and makes it difficult to completely adhere.

Further, since the hologram original plate is immersed in the index matching liquid for a long time, the index matching liquid permeates from the cross section of the adhesive tape, the adhesive force is lowered, and peeling occurs.

Further, in the method using the stopper,
It is necessary to supply an approximately equal amount of index matching liquid to the entire surface of the hologram master plate, but pull the hologram master plate toward the outer circumference of the rotating drum when attaching so that the entire surface of the hologram master plate is in complete contact with the rotating drum. While it is difficult to fix.

If the hologram original plate is not completely adhered to the rotating drum, or if a step is caused by a stopper, or if the double-sided adhesive tape is thick,
When a step is generated in the adhesive portion, when the duplication photosensitive material film is brought into close contact, bubbles are mixed in the raised portion of the hologram original plate, or wrinkles are generated,
There is a problem that the duplicated image is lost or the reproduced image has uneven brightness.

[0008]

As described above, in the conventional method for supporting a hologram master, the hologram master and the hologram master are coated with an approximately equal amount of the index matching liquid over the entire surface between the hologram master and the rotary drum. It was difficult to adhere the entire surface of the to the rotating drum, and it was not possible to withstand long-term use.

The present invention has been made to solve the above problems, and an object thereof is to provide a substantially uniform amount of index matching liquid over the entire surface between the hologram master plate and the rotating drum. By providing a highly reliable hologram master support structure that can be supplied and allows the entire surface of the hologram master to be in complete contact with the rotating drum, and can withstand long-term use. , It is to enable mass replication of the original Lippmann hologram at high speed and stably.

[0010]

Means provided by the present invention for solving the above-mentioned problems are as follows. That is, a Lippmann hologram is pasted on a rotating drum as an original plate, and a photosensitive material film for replication is brought into close contact with the rotating drum. The rotation speed of the rotating drum and the feeding speed of the photosensitive material film for duplication are made to substantially coincide with each other, and laser light is spread from the photosensitive material film for duplication in a slit shape in a direction parallel to the rotation axis of the rotating drum to continuously perform In a method of duplicating a Lippmann hologram, which is adapted to duplicate a Lippmann hologram,
Two slits are provided on the surface of the rotary drum in the direction parallel to the rotation axis, and have a width substantially equal to the width of the rotation drum inside the rotation drum and parallel to the rotation axis. Film holding plate, a pair of sandwiching plates provided with the film holding plate at the tip and intersecting at a movable fulcrum, a fixing metal fitting fixed to the inner periphery of the cut portion of the rotary drum, and a top of the fixing metal fitting. A hologram master plate having a pair of rotatably connected movable fittings, one end of which is fixed inside the rotary drum by a spring, and the other end of which is rotatably connected to an end of the sandwich plate. Is a support structure.

In an embodiment, the film pressing plate is provided with an elastic portion, or the above-mentioned hologram original plate supporting structure is provided in which an end portion of the sandwich plate is extended or an opening / closing handle is provided at the end portion.

Here, the sandwich plate is fixed inside the rotary drum by a spring and movable metal having appropriate strength or adjustable, and the film pressing plate is sandwiched between the hologram original film and the surface of the rotary drum at the same time. The structure is such that it moves more in the direction of the rotation axis. When the hologram original film has a wide width, a support structure having two sandwich plate extrusion moldings may be provided at both ends of the film pressing plate. Further, the number of cut portions is not particularly limited, but is usually about two.

[0013]

Therefore, in the hologram master supporting structure of the present invention, the surface of the rotary drum is provided with a slit-like cut portion in a direction parallel to the rotation axis, and two film pressing plates are provided inside the rotary drum. A sandwich plate constituted is provided, and two edge sides of the hologram original film inserted from the slit-shaped cut portion are sandwiched and fixed,
The sandwich plate is fixed to the inside of the rotating drum by a movable metal fitting and a spring having an appropriate strength or adjustable, and the film pressing plate is sandwiched between the hologram master film and at the same time in the direction of the rotation axis from the surface of the rotating drum. By making the structure such that it moves, it is possible to give a uniform tension to the hologram master plate, supply an almost even amount of index matching liquid to the entire surface between the hologram master plate and the rotating drum, and It becomes possible to make the entire surface of the hologram completely adhere to the rotating drum, and to provide a supporting structure for the hologram master plate that can withstand long-term use.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the support structure for a hologram master according to the present invention will be described in more detail below with reference to the drawings.

FIG. 1 is an explanatory view showing an outline of an apparatus using the hologram original plate supporting structure of the present invention. Rotating drum 1
The original 2 of the Lippmann hologram is mounted and supported, and the laser light emitted from the laser 3 is spread by the cylindrical lens 4 in a slit shape in a direction parallel to the rotation axis of the rotary drum 1, and the rotary drum 1 is irradiated with the laser light.

In this case, the copying photosensitive material film 5 is
In order to perform the liquid immersion for index matching with the original plate 2, the liquid is passed through the liquid immersion roll 6 and the impression roll 7 and brought into close contact with the rotary drum 1 by the nip roll 8. Here, it is preferable that photopolymer is used as the photosensitive material film 5 for duplication and isoper is used as the liquid for index matching.

FIG. 2 is a partially enlarged explanatory view showing the support structure of the hologram original plate of the rotary drum of FIG. 1 which is an embodiment of the present invention. On the surface of the rotary drum 15, two slit-shaped cut portions 17 are provided in a direction parallel to the rotation axis, and a sandwich plate 19 composed of two film pressing plates 18 is provided inside the rotary drum 15 to form a slit shape. The two original sides of the hologram original film 16 inserted from the notch 17 are overlapped and sandwiched and fixed by the film pressing plate 18.

Here, the sandwich plate 19 is an opening / closing handle 20.
The film pressing plate 18 is opened by closing the. The sandwiching plate 19 is fixed inside the rotary drum 15 by a movable metal fitting 21, and the end of the movable metal fitting 21 is pulled by a spring 22 having an appropriate strength or adjustable to be fixed inside the rotary drum 15. Thereby, the structure is such that the two film pressing plates 18 move in the direction in which the hologram original film 16 is sandwiched and, at the same time, in the direction of the rotation axis from the surface of the rotating drum 15.

The film pressing plate 18 is made of an elastic material. As a result, the hologram master plate can be reliably sandwiched and a uniform pulling force can be applied to the entire master film.

Further, a spacer portion 23 is provided between two slit-like notched portions 17, and the rotary drum 15
Therefore, by increasing the thickness of the hologram master film 16 by the thickness of the hologram master film 16, the step difference between the hologram master plate and the spacer portion 22 can be reduced.

<Comparative Example> By the way, FIG. 3 is an enlarged cross-sectional explanatory view of a part of the rotary drum observed from the direction of the rotary axis, which is an example of the prior art. In the conventional technology, the rotating drum 1
The hologram original plate 11 was wound around 0, and both ends in the rotation direction were bonded and fixed to the rotating drum 10 by the double-sided adhesive tape 12.

Here, when the photo-sensitive material film for duplication 13 is brought into close contact, bubbles 14 are accumulated in a step formed by the thickness of the double-sided adhesive tape 12, and the bubbles 14 move to cause a missing of the duplicated image or the brightness of the reproduced image. Samurai unevenness occurs.

[0023]

As described above, according to the present invention, two slit-like cuts in the direction parallel to the rotation axis are provided on the surface of the rotary drum, and two film pressing plates are provided inside the rotary drum. Is provided, and the two edges of the hologram original film inserted through the slit-shaped cut portion are sandwiched and fixed, and the sandwich plate is made to have a movable metal fitting and appropriate strength or adjustable. It is fixed inside the rotating drum by a spring, and the film pressing plate is structured to move in the direction of sandwiching the hologram original film and at the same time in the direction of the rotation axis from the surface of the rotating drum. Supply an approximately equal amount of index matching liquid to the entire surface of the hologram, and make sure that the entire surface of the hologram master plate is in close contact with the rotating drum. Possible and to also support structure of the highly reliable hologram master capable to withstand even long-term use can be provided. As a result, mass production of the original Lippmann hologram can be performed at high speed and stably. Further, by providing an elastic portion on the film pressing plate, the film can be held more reliably.
Further, the opening / closing operation is facilitated by extending the terminal portion of the sandwich plate or providing the opening / closing handle at the terminal portion.

[0024]

[Brief description of drawings]

FIG. 1 is an explanatory view showing an outline of an apparatus using a hologram original plate supporting structure of the present invention.

FIG. 2 is a partially enlarged explanatory view showing a support structure of a hologram original plate of the rotary drum of FIG. 1 which is an embodiment of the present invention.

FIG. 3 is an enlarged cross-sectional explanatory view of a part of the rotary drum observed from the direction of the rotation axis, which is an example of the conventional art.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rotating drum, 2 ... Original plate, 3 ... Laser, 4 ... Cylindrical lens, 5 ... Reproduction photosensitive material film, 6 ... Immersion roll, 7 ... Impression roll, 8 ... Nip roll, 10 ... Rotating drum, 11 ... Hologram master plate , 12
... Double-sided adhesive tape, 13 ... Duplicate photosensitive material film, 1
4 ... Bubble, 15 ... Rotating drum, 16 ... Hologram original plate,
Reference numeral 17 ... Slit-shaped notch portion, 18 ... Film pressing plate, 19 ... Clamp plate, 20 ... Open / close handle, 21 ... Movable metal fitting, 22 ... Spring, 23 ... Spacer.

Claims (3)

[Claims] 1. A Lippmann hologram as an original plate is attached to a rotating drum, a photosensitive material film for duplication is brought into close contact with the rotating drum, and the rotational speed of the rotating drum and the feeding speed of the photosensitive material film for duplication are made substantially equal to each other. From the side of the photosensitive material film for duplication, by irradiating a laser beam spread in a slit shape in a direction parallel to the rotation axis of the rotating drum, in a duplicating device for a Lippmann hologram, which is adapted to continuously duplicate a Lippmann hologram Two slits are provided on the surface of the rotary drum in the direction parallel to the rotation axis, and have a width substantially equal to the width of the rotation drum inside the rotation drum and parallel to the rotation axis. Film holding plate, a pair of sandwiching plates having the film holding plate at the tip and intersecting at a movable fulcrum, and the cut portion of the rotary drum And a pair of movable fittings rotatably connected to the top of the fixed fitting, and one end of the movable fitting is fixed inside the rotary drum by a spring, A support structure for a hologram master, wherein the other end is rotatably connected to the end of the sandwich plate. 2. The support structure for a hologram original plate according to claim 1, wherein the film pressing plate is provided with an elastic portion. 3. A support structure for a hologram master according to claim 1, wherein an opening / closing handle is provided at an end portion of the sandwich plate which is extended or provided.