JPH11231110A - Manufacture of visual field selective sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain various visual field angles having multidirectional visual field selectivity by stacking a positive type image formation layer on an original member and forming a shading duplicate image on the positive type image formation layer through an exposing process and a developing process. SOLUTION: The visual field selective sheet 10 is formed by stacking the positive type image formation layer on the original member 3 and then forming the shading duplicate image 9 on the positive type image formation layer by performing the exposing process from the side of the original member 3 and then developing the positive type image formation layer. In a series of those processes, and image having shading property formed on the original member 3 is used as an original, the positive image formation layer stacked on the original member 3 is exposed and developed, and the shading duplicate image 9 corresponding to the image having the shading property is stacked and formed. The operation processes are repeated to make the image having the shading proper substantially thick and the visual field angle of the visual field selective sheet 10 obtained through those processes can be adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet which transmits light incident from a specific range direction but cannot transmit light incident from another direction, that is, through a sheet, a sheet behind a certain direction. The present invention relates to a method for manufacturing a sheet having a characteristic (view selectivity) in which an object or the like can be visually recognized but cannot be visually recognized from another direction.

[0002]

2. Description of the Related Art Japanese Patent Publication No. 47-43845 discloses that visibility is controlled by alternately attaching transparent and black disks to a desired thickness and then slicing a surface layer in a direction perpendicular to the laminating direction. A technique for obtaining a sheet having properties is disclosed.

Japanese Patent Application Laid-Open No. 63-309902 describes a visibility control film that selectively scatters light at a specific incident angle by irradiating an ultraviolet-curable resin with ultraviolet rays from a certain direction and curing the resin. doing.
Further, according to this technique, if necessary, an ultraviolet curable resin is further applied, and ultraviolet light is irradiated from another direction to be cured, whereby light having angles in two or more directions can be selectively scattered and controlled.

Further, in Japanese Patent Application Laid-Open No. 6-82607,
A transparent polymer resin film having molecular orientation is bent using a blade or the like so that the molecular orientation direction is parallel to the blade of the blade, and in this state, the film is taken up in a direction perpendicular to the molecular orientation direction. A technique is described in which striped crazes are continuously generated substantially parallel to the orientation direction to obtain a visibility control film.

[0005]

However, the above-mentioned Japanese Patent Publication No. 47-43845 and Japanese Patent Application Laid-Open No. 6-8260.
The sheet obtained by the technique disclosed in Japanese Patent Publication No. 7 only has a visual field selectivity from one direction.

On the other hand, according to the technique disclosed in Japanese Patent Application Laid-Open No. 63-309902, it is possible to obtain a sheet having visibility controllability in two or more directions. Because of this, there is no visual field selectivity for completely blocking light. Furthermore, since a special ultraviolet curable resin is used, there is a problem that the cost is high.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has a multi-directional visual field selectivity according to various visual field selectivity requirements using a general-purpose photosensitive material. It is an object of the present invention to provide a manufacturing method capable of easily producing a field-selective sheet having various viewing angles.

[0008]

According to the present invention, the following (1) to (3) are provided on a member on which an image having a light-shielding property is formed.
Is a series of operation steps, and the series of operation steps is performed at least once.

(1) A positive image forming layer is laminated.

(2) Exposure processing is performed from the member side.

(3) A light-shielding duplicated image is formed on the positive image forming layer by developing the positive image forming layer.

In a preferred embodiment, the light-shielding image is an image having a stripe shape, a lattice shape, a honeycomb shape, or the like.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a method for producing a visual field selective sheet of the present invention will be described in detail.

First, the present invention uses a member on which an image having a light-shielding property is formed (hereinafter, referred to as a document member). The document member has a function as a document when a positive image forming layer is subjected to exposure and development processing in a series of working steps to be described later, as well as a function of blocking visible light as a visual field selectable sheet.

The single-layer or multi-layer original member is not particularly limited as long as an image is formed by a light-shielding part and a light-transmitting part. However, from the viewpoints of ease of handling and production, a member having a structure in which an image layer having a light-shielding property is formed on a substrate having a light-transmitting property is preferably used.

Here, the light-shielding property and the light-shielding property used in the present invention mean that the light in the photosensitive wavelength (ultraviolet) region of the positive-type image forming layer is shielded in the exposure processing and that the function of the visual field selectable sheet is achieved. Means the ability to block the visible light range. However, this light-shielding property does not mean complete light-shielding, and the difference in density between the light-transmitting portion and the light-transmitting portion is 0.1% in optical density.
A density difference of 5, preferably 0.7 or more is sufficient.

The term "light transmittance" as used herein refers to the light-sensitive wavelength (ultraviolet) of the positive image forming layer in the exposure processing described later.
It does not block the light in the region and does not block the visible light region as a function of the field-of-view selection sheet, and preferably has high transmittance and low diffusion.

Further, the material having light transmittance is not particularly limited as long as it has light transmittance, such as glass and synthetic resin. From the viewpoint of ease of handling, a plastic film such as polyester, polycarbonate, triacetyl cellulose, polyvinyl chloride, acryl, polystyrene, polyamide, polyimide, polyethylene, and polypropylene is preferably used.

The image having a light-shielding property is not particularly limited as long as it has a light-shielding property, but an excellent field-selection sheet having a relatively uniform field-selectivity can be used. In order to obtain the image, the image must be striped as shown in FIG. 18, a grid as shown in FIG. 19 or FIG.
It is effective that the image is a honeycomb-like image as shown in FIGS.

In the case where these light-shielding image layers are formed on a light-transmitting substrate, a recording method formed by exposure and development is applied from the viewpoint of forming a high-resolution image. After laminating the layers to be formed, a method of forming by the recording method is suitably used. However, the method is not particularly limited to this method, and a method of laminating layers applied to recording methods such as printing, electrostatic transfer recording method, ink jet recording method, and thermal transfer recording method, and forming by the recording method is also available. It is possible to adopt.

In the field-of-view selective sheet of the present invention, a positive-type image forming layer is laminated on the above-mentioned original member (first step), exposed from the original member side (second step), and then the positive-type image is formed. The light-shielding duplicated image is formed on the positive-type image forming layer by developing the formed layer (third step).

In a series of these working steps, a light-shielding image formed on the document member is used as a document, and a positive-type image forming layer laminated on the document member is exposed and developed. This is a step of forming a light-shielding duplicate image corresponding to the image to be formed.

By repeating this series of working steps, it is possible to substantially increase the thickness of the light-shielding image, and to adjust the viewing angle of the field-selective sheet obtained in the series of working steps. It is possible to do.

Hereinafter, each step of the present invention will be described in order.

First, the first step in the present invention will be described.

The first step in the present invention is a step of laminating a positive image forming layer on a document member.

The positive type image forming layer is a layer laminated on the original member, and has the same shape as the light-shielding image of the original member by irradiating the original with the light and irradiating with light. This is a layer on which a (positive-positive) light-shielding duplicated image is formed.

Therefore, whether this positive type image forming layer is a single layer or a multilayer is not particularly limited as long as the photosensitive layer is included therein. Therefore, another layer such as a light-shielding layer, an adhesive layer, and a support may be laminated on the photosensitive layer.

That is, the light-shielding duplicate image formed by lamination is
The same shape (positive image) as the light-shielding image of the original member
Positive) if the image has a light-shielding property, the light-shielding layer may be laminated on the unexposed portion of the photosensitive layer, or the unexposed portion of the photosensitive layer may be singly dyed or colored to form a light-shielding property. The thing which came to have may be used.

The photosensitive layer referred to in the present invention is a photosensitive layer that is exposed to light and reduces the adhesiveness of the exposed portion to the light-shielding layer, and the coloring of the exposed portion due to staining or coloring. It is a layer having the ability to drip.
Examples of such a photosensitive layer include a diazonium salt, a tetrazonium salt, an o-naphthoquinonediazide derivative, an aromatic bisazide compound, an aromatic azide compound, an azide compound, a photodimerizable compound, o-quinonediazide,
Examples thereof include photosensitive materials mainly containing silver halide, acrylate monomer / photoinitiator / binder resin, and the like.

If necessary, the light-shielding layer used together with the light-sensitive layer may be a light-shielding layer that shields light in the photosensitive wavelength (ultraviolet) region of the photosensitive layer and shields the visible light region as a function of a field-selective sheet. The layer is not particularly limited as long as it has properties.

Further, a dye constituting the light-shielding layer in this case,
The type of the light-shielding material such as a pigment and a metal is not particularly limited, and the light-shielding layer may be formed of these light-shielding materials alone or in a state where these light-shielding materials are dispersed in a binder or the like. It may be formed by.

As the laminating method in the first step of the present invention, the photosensitive material or the light-shielding material may be directly laminated on the document member by a known coating method, or may be laminated on a separately provided support. After coating the layer or the light-shielding material, it can be laminated by laminating the document member via an adhesive layer.

As the support here, a plastic film or the like used for the above-mentioned substrate having light transmittance can be employed.

As a known coating method,
Liquid coating methods such as knife coating, doctor coating, bar coating, roll coating, blade coating, kiss coating, spray coating, spin coating, and dip coating, as well as vacuum film forming methods such as vapor deposition coating and sputter coating And other coating methods can be appropriately adopted.

Here, when the photosensitive layer and the light shielding layer are directly laminated on the original member by coating, it is necessary to laminate the photosensitive layer and the light shielding layer in this order.

When the photosensitive layer and the light-shielding layer are laminated on a light-transmitting support in advance, the order of lamination is not limited. However, when laminating the document member via an adhesive layer, it is necessary to laminate the photosensitive layer and the light shielding layer in this order from the document member side. The lamination is performed in such a manner that the light-shielding layer does not exist between the light-shielding image formed on the document member and the photosensitive layer so that the exposure of the photosensitive layer is not hindered.

Next, the second step in the present invention will be described.

The second step of the present invention is a step of exposing the positive image forming layer laminated on the original member from the original member side.

The exposure processing referred to here is to treat a light-shielding image in the document member as a document and arrange it on the light source side, and then prevent light from reaching the photosensitive layer laminated on the image portion. This refers to a process of irradiating light only to the photosensitive layer laminated on the portion where the image is not formed.

In this case, it is preferable that the light emitted from the light source is a light having a high degree of parallelism containing as little diffused light as possible, and is a light emitted perpendicularly to the document member.

It is appropriate that the exposure processing using such a highly parallel light beam is performed by an exposure apparatus having a collimator function in the optical system.

Next, the third step in the present invention will be described.

The third step of the present invention is a step of forming a light-shielding duplicate image on the positive image forming layer by developing the positive image forming layer exposed in the second step.

Here, the developing treatment is a treatment for imparting light-shielding properties to the unexposed portions of the photosensitive layer in the exposure treatment. For example, the light-shielding layer corresponding to the exposed portion of the photosensitive layer in which the light-shielding layer is laminated on the photosensitive layer in advance is peeled off, or the light-shielding layer is adhered to the unexposed portion of the photosensitive layer, or the unexposed portion of the photosensitive layer is removed. That is, processing such as coloring and shading by dyeing or coloring is performed.

More specifically, as a method for peeling off the light-shielding layer corresponding to the exposed portion of the photosensitive layer in which the light-shielding layer has been previously laminated on the photosensitive layer, a method for peeling off the light-shielding layer together with the support (peel- off) and a method (wash-out) of swelling, eluting and peeling the photosensitive layer together with the light-shielding layer by a developer penetrating the light-shielding layer.

As a method for adhering the light-shielding layer to the unexposed portion of the photosensitive layer, the light-sensitive layer is exposed to light so that the tackiness of the exposed portion is lost and only the unexposed portion where the tackiness remains is exposed. A method of transferring the light-shielding layer and the like can be mentioned.

Further, as a method of coloring and shading the unexposed portion of the photosensitive layer by dyeing or coloring, for example, the photosensitive layer of an alkali-soluble binder / diazonium salt system is developed with an alkali staining solution after exposure. A method in which an exposed portion of the photosensitive layer is eluted and an unexposed portion is dyed to form a colored relief image having a light-shielding property is exemplified.

Next, the visual field selectable sheet obtained by the present invention will be described.

According to the present invention, a series of working steps of lamination (first step), exposure processing (second step), and development processing (third step) of the positive type image forming layer are repeated on the original member. This is a method for producing a field-selective sheet, in which one or more layers on which a light-shielding duplicate image corresponding to the light-shielding image is formed are laminated.

The field selectivity and the field angle of the field selectable sheet are adjusted by the shape of the light-shielding image provided on the document member and the thickness of the light-shielding portion.

In order to increase the frontal transmittance of the field-of-view selection sheet, it is preferable to reduce the area ratio of the light-shielding image portion as much as possible, and the area ratio is 75% or less, preferably 50% or less. %, More preferably 25% or less.

The viewing angle and the viewing selectivity can be adjusted by the shape and the area ratio of the image portion.

The thickness of the light-shielding portion of the light-shielding image is adjusted by adjusting the thickness of the light-shielding image in the original document member and the thickness of the light-shielding duplicate image to be laminated. be able to.

Therefore, in order to adjust the viewing angle to be narrow, it is necessary to increase the thickness of the light-shielding portion.

In this case, in order to increase the thickness of the light-shielding portion, it is necessary to increase the thickness of the light-shielding image provided beforehand in the document member or the light-shielding duplicate image to be laminated. Becomes possible.

However, there is a limit in increasing the thickness of the light-shielding image provided beforehand in the document member or the light-shielding duplicate image formed by lamination alone, and even if the thickness can be increased. Evils are likely to occur.

For this reason, it is not appropriate to increase the thickness of the light-shielding portion alone by the thickness of the light-shielding image provided beforehand in the document member or the thickness of the light-shielding duplicate image formed by lamination alone. I can't say. This is because, for example, if the thickness of the light-shielding duplicate image formed by lamination is increased by only one layer, such a problem occurs that an image cannot be obtained clearly during exposure and development.

Then, as a method of adjusting the viewing angle narrowly,
A method in which a plurality of light-shielding duplicate images are stacked by repeating a series of operation steps of lamination, exposure processing, and development processing of the positive-type image forming layer to increase the thickness of the light-shielding portion can be adopted.

In this case, by performing a series of operation steps many times, a plurality of light-shielding duplicate images can be laminated and the thickness of the light-shielding portion can be increased, so that the number of times of the series of operation steps is adjusted. By doing so, the viewing angle can be easily adjusted.

In this case, the thickness of the portion having the light-shielding property means that even if a layer having no light-shielding property is sandwiched between the image layer having the light-shielding property and the light-shielding duplicated image, the light-shielding property is apparent in appearance. The thickness of a layer that can be recognized as a thickness of a portion having a light-shielding property, in which no layer is not recognized, is substantially referred to.

[0062]

Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. Unless otherwise specified, "part" and "%"
Based on weight.

Example 1 Manufacture of manuscript member A photosensitive silver salt film having a photosensitive layer of about 5 μm (Konica Clearlight Duplication Film CUH
DA: manufactured by Konica Corp.)
A non-image portion having a light transmittance of 50 μm was also overlaid on a 50 μm striped original and subjected to a contact exposure process, followed by development and fixing to form an image portion 1 having a light-shielding property as shown in FIG. A document member 3 was produced.

2. Lamination of Positive Image Forming Layer (First Step) An Al light-shielding layer 5 of about 0.1 μm is formed as a light-shielding layer on a 50-μm polyester film 4 by using a vacuum evaporation method.
Next, the following photosensitive layer coating solution and adhesive layer coating solution are sequentially applied and dried to obtain a photosensitive layer 6 of about 5 μm,
Was formed. Then, via the adhesive layer 7,
The positive image forming layer 8 was laminated on the document member 3 as shown in FIG.

<Coating solution for photosensitive layer> 20 parts of vinyl chloride-vinyl acetate-maleic anhydride copolymer 0.8 parts of 4- (p-tolylmercapto) -2,5-diethoxybenzenediazonium zinc chloride 80 parts of methyl ethyl ketone

<Coating solution for adhesive layer> Acrylic urethane adhesive 60 parts (Polybond AY-651A: manufactured by Sanyo Chemical Industries) Acrylic urethane adhesive 10 parts (Polybond AY-651C: manufactured by Sanyo Chemical Industries)・ Ethyl acetate 75 parts ・ Toluene 75 parts

3. Exposure Treatment (Second Step) The document member 3 on which the positive-type image forming layer 8 is laminated is highly parallelized from the document member surface side by using a parallel light exposure device (model EXM-1201: manufactured by Oak Manufacturing Co., Ltd.). Exposure treatment is performed using the light beam 11 (FIG. 4), and the diazonium salt in the photosensitive layer 6 is photolyzed, and the exposed portion of the photosensitive layer 6 is exposed.
The interfacial adhesive strength between the Al light shielding layer 5 and the Al light shielding layer 5 was made lower than the interfacial adhesive strength between the Al light shielding layer 5 and the polyester film 4.

4. Developing Process (Third Step) The 50 μm polyester film 4 in the positive-type image forming layer 8 is peeled off from the document member 3 on which the positive-type image forming layer 8 after the above-mentioned exposure process is laminated. Then, the unexposed portion of the Al light-shielding layer 5 is sufficiently adhered to the photosensitive layer 6 and remains on the original member 3 side, and the exposed portion of the Al light-shielding layer 5 has a reduced interfacial adhesive force with the photosensitive layer 6. It was peeled off together with the polyester film 4 (FIG. 5), and a light-shielding duplicate image 9 was formed on the document member 3 in a laminated manner.

5. Repeating the above-mentioned three steps 2-4 The above-mentioned three steps 2-4 are further repeated three times on the document member 3 on which the light-shielding duplicate image 9 is formed by lamination.
A total of four light-shielding duplicate images 9 as shown in FIG.

Example 2 The steps 2 to 4 of Example 1 were repeated three more times on the visual field selectable sheet of Example 1 for a total of seven layers of light-shielding duplication as shown in FIG. Image 9
Was formed to form a field-of-view selectable sheet 10.

[Third Embodiment] Manufacture of Manuscript Member Manuscript member 3 was manufactured in the same manner as in Example 1.

2. Lamination of Positive Image Forming Layer (First Step) The following adhesive photosensitive layer coating solution was applied to a 25 μm polyester film 4 and dried to form an adhesive photosensitive layer 6 of about 15 μm. Subsequently, the adhesive photosensitive layer 6
Then, the positive type image forming layer 8 was laminated on the document member 3 as shown in FIG.

<Coating solution for adhesive photosensitive layer> 125 parts of triethylene glycol dimethacrylate 107 parts of methyl methacrylate polymer 2-O-chlorophenyl-4,5-bis (m-methoxyphenyl) imidazolyl dimer 6 Parts ・ 2-mercaptobenzothiazole 6 parts ・ 7-diethylamino-4-methylcoumarin 3 parts ・ Trichloroethylene 1770 parts

3. Exposure Treatment (Second Step) In the same manner as in Example 1, exposure treatment was performed from the document member 3 surface side, and the photosensitive layer 6 was cured to eliminate the tackiness of the exposed portion.

4. Developing Process (Third Step) After the 25 μm polyester film 4 in the positive image forming layer 8 is peeled from the document member 3 on which the positive image forming layer 8 after the above-mentioned exposure process is laminated, it is dispersed in an acrylic resin in advance. After spraying the carbon black (Vulcan XC-72: manufactured by Cabot Corporation) toner, excess toner was removed and development processing was performed. Then, the toner adheres to only the unexposed portions of the photosensitive layer 6 where the adhesiveness has not been lost to form a light-shielding layer, and as shown in FIG.
Was formed.

5. Repeating the above-mentioned three steps 2-4 The above-mentioned three steps 2-4 are further repeated three times on the document member 3 on which the light-shielding duplicate image 9 is formed by lamination.
A total of four light-shielding duplicate images 9 as shown in FIG.

[Embodiment 4] Manufacture of manuscript member On a photosensitive silver halide film similar to that in Example 1, a lattice-shaped manuscript having a light-shielding image line portion of about 10 μm and a light-transmitting non-image portion of about 30 μm on a side was superimposed. After the exposure process, a developing and fixing process was performed to produce a document member 3 on which an image portion 1 having a light-shielding property was formed as shown in FIG.

2. Lamination of Positive Image Forming Layer (First Step) The following photosensitive layer coating solution is applied to a 50 μm polyester film 4 and dried to form a photosensitive layer 6 having a thickness of about 10 μm. The adhesive layer coating liquid of Example 1 was applied and dried to form an adhesive layer 7 of about 5 μm. Subsequently, the positive image forming layer 8 was laminated on the document member 3 as shown in FIG. 11 by bonding to the image surface of the document member 3 via the adhesive layer 7.

<Coating solution for photosensitive layer>-8 parts of vinyl chloride-vinyl acetate copolymer-12 parts of vinylidene chloride resin-5 parts of methyl methacrylate resin-10 parts of sulfosalicylic acid-2 parts of zinc chloride-m-oxyethylphenol 10 -1 part of resorcinol-2 parts of 3-sulfonic acid-1-oxynaphthalene-8-sulfonic acid methylamide-7 parts of double salt of 4-morpholinobenzenediazonium dichloride-7 parts-400 parts of methylcellosolve-440 parts of methyl ethyl ketone-100 parts of ethanol-silicic acid 5 parts fine powder (Sylysia 435: Fuji Silysia Chemical Ltd.)

3. Exposure Treatment (Second Step) In the same manner as in Example 1, exposure treatment was performed from the document member 3 surface side, and the diazonium salt in the photosensitive layer 6 was photolyzed.

4. Developing Process (Third Step) After the 50 μm polyester film 4 in the positive-type image forming layer was peeled off from the document member 3 on which the positive-type image forming layer 8 after the exposure process was laminated, a dry ammonia developing process was performed. . Then, the diazonium salt and the coupler in the unexposed portion of the photosensitive layer were subjected to a coupling reaction in an alkaline atmosphere with ammonia and changed to an azo dye, whereby the unexposed portion of the photosensitive layer was colored and shielded. Therefore, as shown in FIG. 12, a light-shielding duplicate image 9 is formed on the document member 3 in a stacked manner.

5. Repeating the above-described three steps 2-4 The above-mentioned three steps 2-4 are further repeated twice on the document member 3 on which the light-shielding duplicate image 9 is formed by lamination.
A total of three light-shielding duplicate images 9 as shown in FIG. 3 were laminated to form a visual field selectable sheet 10.

[Embodiment 5] Manufacture of manuscript member A honeycomb-shaped manuscript having a light-shielding image line portion of about 10 μm and a light-transmitting non-image portion having a side of about 20 μm was superposed on the same photosensitive silver halide film as in Example 1. After the exposure process, a developing and fixing process is performed, and a document member 3 on which an image portion 1 having a light shielding property is formed as shown in FIG.
Was prepared.

2. Lamination of Positive Image Forming Layer (First Step) The following photosensitive layer coating solution is applied to one surface of a 12 μm polyester film 4 and dried to about 5 μm
Was formed, and the coating liquid for the adhesive layer of Example 1 was applied to the other surface and dried to form an adhesive layer 7 of about 5 μm. Subsequently, it is bonded to the image surface of the document member 3 via the adhesive layer 7, and as shown in FIG.
A positive type image forming layer 8 was laminated on the document member 3.

<Coating solution for photosensitive layer> 4 parts of vanillin-modified polyvinyl alcohol 4 parts of methacrylate copolymer 1-diazo-3-chloro-4-N, N-diethylamino-benzene chloride 1/2 chloride Zinc 1.2 parts ・ Methyl cellosolve 85 parts

3. Exposure Treatment (Second Step) In the same manner as in Example 1, exposure treatment was performed from the document member 3 surface side, and the diazonium salt in the photosensitive layer 6 was photolyzed.

4. Developing Process (Third Step) The original member 3 on which the positive-type image forming layer 8 after the exposure process is laminated is developed using an alkaline developer in which a dye (Direct Deep Black XA: manufactured by Hodogaya Chemical Co., Ltd.) is dissolved in advance. After the treatment, it was washed with tap water. Then, the unexposed portion of the photosensitive layer 6 became hardly soluble in the alkali solution by the coupling reaction, and was dyed and shielded by the dye, and the exposed portion of the photosensitive layer 6 was eluted by the alkali solution. Therefore, FIG.
As shown in FIG. 6, a light-shielding duplicate image 9 was formed on the document member 3 by lamination.

5. Repeating the above-mentioned three steps 2-4 The above-mentioned three steps 2-4 are further repeated once on the document member 3 on which the light-shielding duplicate image 9 is formed by lamination.
A total of two light-shielding duplicate images 9 as shown in FIG. 7 were laminated to form a visual field selectable sheet 10.

The visual field-selective sheets obtained in Examples 1 to 5 were evaluated by visual observation and measurement of the visual field angle as follows.

A. [Visual Evaluation] The visual field selectable sheet was inclined at every angle, and the visibility on the other side viewed through the visual field selectable sheet was evaluated.

[Visual Evaluation Results] In Examples 1 to 3, when tilted in one direction perpendicular to the striped image, the other side viewed through the field-of-view selectable sheet became invisible.

Further, in Examples 4 and 5, when tilted in all directions (multi-direction), the other side viewed through the field-of-view selectable sheet became invisible.

B. [Measurement of Viewing Angle] A light source and a light receiving unit are installed so that a laser beam emitted from a laser light source hits a light receiving unit of an optical power meter (Optical Power Meter TQ8210: Advantest), and a field-of-view selection sheet is provided in the laser light path. Set up a sample installation place. By changing the installation angle of this sample, the angle of incidence, that is, the angle formed by the optical path with respect to the direction perpendicular to the field selectable sheet sample, is changed from -50 degrees to 5 degrees.
The incident angle of the laser beam to the sample is changed so that it changes every 10 degrees to 0 degree, and the transmittance at each incident angle is obtained from the value of the power meter at each angle,
It is shown in Table 1. The transmittance at each angle was calculated by the following equation.

Transmittance = measured value when a sample is set at each angle / measured value when no sample is present × 100
(%)

[Results of Measurement of Viewing Angle]

[Table 1]

As is apparent from the above results, according to the manufacturing method of the present invention, it is possible to variously adjust the shape of the light-shielding image provided on the document member and the lamination thickness of the light-shielding portion. As a result, it was possible to easily produce a field-selective sheet having multi-directional field selectivity or a desired field angle.

[0097]

As is apparent from the above description, according to the present invention, the visual field which can have multi-directional visual field selectivity or various visual field angles according to various visual field selectivity requirements. Selective sheets can be easily produced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment of a visual field selectable sheet of the present invention.

FIG. 2 is a perspective view showing an embodiment of a document member of the present invention.

FIG. 3 is a cross-sectional view illustrating an example in which a positive image forming layer is laminated on a document member after the first step of the present invention is completed.

FIG. 4 is a conceptual cross-sectional view of a second step of the present invention.

FIG. 5 is a conceptual sectional view showing one embodiment of a third step of the present invention.

FIG. 6 is a sectional view showing another embodiment of the visual field selectable sheet of the present invention.

FIG. 7 is a cross-sectional view showing another embodiment in which a positive image forming layer is laminated on a document member after the completion of the first step of the present invention.

FIG. 8 is a cross-sectional view showing an example in which a light-shielding duplicate image is formed on a document member after the third step of the present invention is completed.

FIG. 9 is a sectional view showing another embodiment of the visual field selectable sheet of the present invention.

FIG. 10 is a perspective view showing another embodiment of the document member of the present invention.

FIG. 11 is a cross-sectional view showing another embodiment in which a positive image forming layer is laminated on a document member after the completion of the first step of the present invention.

FIG. 12 is a cross-sectional view showing another embodiment in which a light-shielding duplicate image is formed on a document member after the third step of the present invention is completed.

FIG. 13 is a sectional view showing another embodiment of the visual field selectable sheet of the present invention.

FIG. 14 is a perspective view showing another embodiment of the document member of the present invention.

FIG. 15 is a cross-sectional view showing another embodiment in which a positive image forming layer is laminated on a document member after the completion of the first step of the present invention.

FIG. 16 is a cross-sectional view showing another embodiment in which a light-shielding duplicate image is formed on a document member after the third step of the present invention is completed.

FIG. 17 is a sectional view showing another embodiment of the visual field selectable sheet of the present invention.

FIG. 18 shows an example of an image having light-shielding properties according to the present invention.

FIG. 19 shows an example of an image having light-shielding properties according to the present invention.

FIG. 20 shows an example of an image having light-shielding properties according to the present invention.

FIG. 21 shows an example of an image having light-shielding properties according to the present invention.

FIG. 22 shows an example of an image having light-shielding properties according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Image part which has a light-shielding property 2 ... Part which has a light-transmitting property 3 ... Document member 4 ... Support which has a light-transmitting property 5 ... Light-shielding layer 6 ... Photosensitive layer 7 ... Adhesive layer 8 ... Positive type image forming layer 9 ... Duplicated light-shielded image 10 ・ ・ Field of view selectable sheet 11 ・ ・ Light rays with high parallelism

Claims (2)

[Claims] 1. A method according to claim 1, wherein the following three steps (1) to (3) are performed as a series of operation steps on the member on which the image having light-shielding properties is formed, and the series of operation steps is performed at least once. A method for producing a feature-selective sheet. (1) A positive image forming layer is laminated. (2) Exposure processing is performed from the member side. (3) A light-shielding duplicate image is formed on the positive-type image forming layer by developing the positive-type image forming layer. 2. The method according to claim 1, wherein the light-shielding image is a striped, lattice, or honeycomb image.