JP2006098891A - Photography method and photography auxiliary tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for photographing an object such as a photograph without requiring troublesome handling and without lowering image quality and a photography auxiliary tool. <P>SOLUTION: The object 3 is brought into contact with an antireflection plate 4 whose luminous reflectance is 3% or less and haze is 10% or less and is photographed through the antireflection plate 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a photographing method and a photographing auxiliary tool for photographing a sheet-like subject such as a photograph in a beautiful and easy-to-handle manner.

  When reporting a missing person on a TV program or introducing a deceased person, a photo may be taken with a VTR. When shooting a sheet-like subject such as a photo, place the subject on a flat table. Or shooting with the subject attached to a wall or a rotating whiteboard. At this time, the subject may be bent, TV shooting, etc. may be damaged due to the heat of the lighting, or pinning may cause damage. Therefore, a method that can easily fix the subject has been desired.

Patent Document 1 proposes a method for photographing a fishing day by sandwiching a newspaper on the day of fishing as non-reflective glass and a base plate as a fishing fish photographing tool. In this document, the non-reflective glass is used for the purpose of improving visibility and avoiding contamination of the newspaper by fishing fish. However, the non-reflective glass having unevenness on the surface reduces the reflection, Even if the date of the date becomes readable, the whole image becomes whitish and the image such as a photograph becomes blurred, which is completely insufficient for use in taking a photo or an image. In addition, the camera is fixed to a shooting aid with a copy stand, and cannot be used at all for television shooting.
Japanese Utility Model Laid-Open No. 7-1436

  The present invention is intended to provide a photographing method that can shoot a subject such as a photograph with almost no influence on the image quality of the photographed image and eliminates the above inconveniences. In addition, it is intended to provide a photographing assistance tool that realizes the method.

The present invention has the following configuration in order to solve the above problems.
(1) A method of photographing a sheet-like subject using a photographing device, wherein an antireflection plate having a luminous reflectance of 3% or less and a haze of 10% or less is brought into contact with the photographing surface of the subject, A photographing method for photographing the subject through the antireflection plate;
(2) A photographing method for photographing using a photographing device having a resolution of 69 dpi or less as the photographing device;
(3) A photographing assisting tool used in the photographing method described in (1) above, in which various functions such as subject angle adjustment and ease of carrying are provided.

  According to the present invention, it is possible to shoot without substantially reducing the image quality of the photographed image, and it is possible to remarkably improve the handling of the subject and to eliminate the troublesome state at the time of photographing.

  In the photographing method of the present invention, photographing is performed with an antireflection plate having a luminous reflectance of 3% or less and a haze of 10% or less in contact with the subject on the subject photographing surface. Such a reflection-prevented front plate can greatly reduce the reflection and reflection of external light without substantially reducing the quality of the captured image. When photographing in an environment where the illuminance exceeds 20000 lx, such as outdoors or on television, it is more preferable to use one having a luminous reflectance of 1% or less and a haze of 5 to 8%. The details of the method of manufacturing the antireflection plate will be described later, but the antireflection plate is a plastic plate coated with a non-glare treatment and an antireflection layer. Can be changed. Non-glare processing can scatter reflected light and eliminate reflections, but if it is only that, the reflection itself will not decrease, so the transmitted image will become whitish, and if it is too high, it will be photographed by light scattering The image quality itself of the recorded image may be degraded. By providing the antireflection layer, the reflection that causes whiteness can be reduced. As a result, the contrast is improved and the image can be taken very clearly.

  When a subject is photographed with a photographing device having a resolution of 69 dpi or less, the resolution of the photographing device itself hardly reflects the influence of the antireflection plate on the resolution, so that photographing can be performed without causing deterioration in image quality. Here, the resolution is the degree to which a captured image such as a fine pattern can be recognized. It is represented by the number of pixels (pixels) in a photographing device such as a digital camera, and the number of scans in an analog device. It can be read. However, since the resolution depends on the subject size (shooting range), in the present invention, the number of pixels of the photographing device with respect to the subject size, dpi (dot per inch) is used as the resolution of the photographing device.

  The photographing assisting tool of the present invention will be described with a specific example with reference to the drawings. Of course, the present invention is not limited to this specific example.

  FIG. 1 and FIG. 2 show one mode of the photographing assisting tool of the present invention. FIG. 1 is a schematic view of a holder for fixing a subject flat, and FIG. 2 is a schematic view of a support base that supports the holder.

  In the present invention, it is preferable that the angle of the subject can be set freely. If the subject can be set vertically, horizontally, or freely from horizontal to vertical, it is easy to position the photographing device and the light source, and it can cope with severe installation conditions. This is because the subject can be photographed from the front if the angle is adjusted without adjusting the height of the photographing device.

  For this reason, the present invention preferably includes an angle adjustment mechanism. This embodiment will be described more specifically with reference to FIGS. 1 and 2. The holder 1 and the support base 2 can be separated from each other. Thus, the subject can be set vertically and horizontally. Further, when the support base 2 is configured such that three core members (plates) are connected to each other, the support base 2 can be set to a free angle by appropriately setting the bending angle.

  Furthermore, if the magnet sheet 9 is provided on the back surface of the holder 1 and a magnetic material is used for the core material 10 of the support base 2, the holder 1 can be supported stably even when the holder 1 is set up vertically. You can also paste 1 directly on a whiteboard.

  In the photographing auxiliary tool of the present invention, the holder 1 includes the antireflection plate and the back plate, and the subject is held between the antireflection plate and the back plate, or the subject 1 The holding structure is preferably a structure that can be held with one hand. For example, a professional video camera for television shooting is very convenient if the subject can be set or the position can be adjusted without placing the camera one by one when shooting with a shoulder. Although the structure is not particularly limited, FIG. 1 will be described as an example. The antireflection plate 4 and the back plate 5 are engaged with a hinge 6 on one side, and a magnet 7 or the like is detachable on the opposite side. If a member that can be fixed to is provided, the antireflection plate can be opened and closed with one hand, so that it is easy to handle. In addition, it is a preferable aspect that a guide is provided on the back plate so that the antireflection plate can be opened and closed in a sliding manner, or a mechanism in which the antireflection plate engaged with a hinge is opened with a spring or the like in one push. is there.

  It is preferable that the back plate has a material or a mechanism on the side in contact with the subject that prevents the subject from slipping, since handling is further improved. Examples of such a material include a fine pressure-sensitive adhesive sheet that can be repeatedly bonded and a raised fabric. Further, it is preferable that the surface on the side of the back plate that is in contact with the subject is less reflective, and it is sufficient to absorb light with a dark color such as black or a matte color, and the luminous reflectance is 10% or less. Is preferably used.

  If there is a protrusion on the surface of the antireflection plate on the photographing device side, it is not preferable because a shadow is produced by illumination. For example, a frame-like holder can be made, but care must be taken so that the forehead does not become a shadow. It is preferable that the height of the protrusion is substantially 1.5 mm or less.

The imaging assisting tool of the present invention is light, and it is convenient that it is easy to carry when the weight of the entire imaging assisting tool with respect to the effective imaging area is 2 g / cm ² or less. If the antireflection plate is based on plastic, it is lightweight and does not break like glass, which is convenient for use in the field. Here, the effective imaging area is the maximum area of the subject that can be set, i.e., the mechanism for fixing the subject to the antireflection plate from the area of the surface of the antireflection plate that is in contact with the subject, the structure for fixing to the support base, The area excluding the area where the subject cannot contact the antireflection plate due to the engagement structure with the back plate.

  The antireflection plate used for the photographing auxiliary tool of the present invention will be described.

  FIG. 3 is a schematic cross-sectional view showing an example of the configuration of the antireflection plate. The substrate used for the antireflection plate used in the present invention is a substrate 13 having light transmittance, and preferably has a visible light transmittance of 95% or more and is colorless. By setting it to 95% or more, it is possible to take beautiful pictures without affecting the color tone of the subject. The substrate 13 is preferably made of plastic, for example, polymethacrylic acid resin, polycarbonate resin, polyolefin resin, polyether resin, polyester resin, polysulfone resin, polyamide resin, polysulfide resin, unsaturated polyester resin, epoxy resin, melamine resin. , Phenolic resin, diallyl phthalate resin, polyimide resin, maleimide resin, polyphosphazene resin, urethane resin, polyvinyl acetate resin, polyvinyl alcohol resin, styrene resin, vinyl chloride resin, fibrous resin, diethylene glycol bisallyl carbonate polymer ( CR-39) and resins composed of polymers selected from the structural units of the above resins and other structural units.

  In order to improve the scratch resistance and the adhesion of the antireflection film laminated thereon, the substrate is preferably provided with a hard coat film 14 on the surface or both sides of the photographing apparatus.

  The material used for the hard coat film is not particularly limited, but a thermosetting organopolysiloxane hard coat material or an ultraviolet curable acrylic hard coat material is preferably used. In particular, an acrylic resin hard coat material can be suitably used because of its low cost. More preferably, by using a hard coat material having a refractive index comparable to that of the base material, interference fringes are difficult to see even when the film is provided, which is advantageous for photographing.

  Further, when non-glare treatment is performed on the substrate or the hard coat film, reflection is prevented, so that it is preferably performed. Here, the non-glare treatment is a treatment for forming irregularities by performing sandblasting or embossing, or dispersing fine particles on a substrate or a hard coat film.

  The antireflection film 15 has an action of reducing reflection in the visible light region by utilizing interference of light. The antireflection film 15 may be a single layer film or a multilayer film, and may be provided on the surface or both surfaces on the photographing apparatus side. Examples of the antireflection film include the following two preferred embodiments.

  That is, (A) a film made of a material having a refractive index of 1.6 to 1.9, (B) a film made of a material having a refractive index exceeding 1.9, and (C) a material having a refractive index of less than 1.6. Is formed as a film laminated in this order from the substrate surface, and at an arbitrary wavelength λ0 selected from 450 to 550 nm, the following formula (1), (2), (3) or the following formula (1), Those satisfying (2) ′ and (3) are desirable. In addition, it is preferable to apply this film to both surfaces of the substrate because the luminous reflectance can be reduced to 1% or less.

na × da / λ 0 = 0.15 to 0.35 (1)
nb × db / λ 0 = 0.15 to 0.35 (2)
nb × db / λ0 = 0.40-0.60 (2) ′
nc × dc / λ 0 = 0.15 to 0.35 (3)
(Here, na, nb, and nc are the refractive indexes of the films (A), (B), and (C), respectively, and da, db, and dc are the thicknesses of the films (A), (B), and (C), respectively. .)
λ 0 is appropriately selected mainly depending on the subject and the light source, but is selected according to the color tone of the subject and the wavelength characteristics of the light source. Further, the antireflection film is produced in consideration of the slightly produced reflection interference color and stability during production.

That is, as a material constituting the antireflection film, for example, Al ₂ O ₃ , In ₂ O ₃ , MgO, Nb ₂ O ₃ , SiO ₂ , SiO, SnO ₂ , TiO ₂ , Ta ₂ O ₅ , WO ₃ , It may be an inorganic material such as Y ₂ O ₃ , ZrO ₂ , MgF ₂ , TiC, TiN, ITO (Indium-tin oxide), or an organic material such as a fluororesin, a silicon resin, or an acrylic resin. Moreover, as long as transparency can be ensured, these may be mixed. In short, it is only necessary to select one that provides a desired refractive index in a transparent state.

  Further, (A) a film made of a material having a refractive index of 1.6 to 1.9, (B) a film made of a material having a refractive index exceeding 1.9, and (C) a refractive index of less than 1.6. Each of the films made of the material may be configured as a single layer film, or may be a film having a refractive index adjusted as a composite film in which two or more layers are combined.

For example, if a composite film of a layer two layers, the refractive index n _c that viewed as a whole, when the reflectivity increased by film is formed in layers is maximized (optical film thickness: .lambda.0 / From the maximum value R _max of the reflectance in 4), it is obtained by the formula, n _c = ((1 + R _max ^1/2 ) / (1−R _max ^1/2 )) ^1/2 . In addition, the refractive index can be adjusted as a so-called equivalent film in which the layer structure is an odd number and a film having the same structure is disposed at a position symmetrical to the center of thickness. In that case, the refractive index N as a whole is D as the physical film thickness as a whole, i as the number of layers, n _{i as} the refractive index of the i-th layer counted from the outermost layer, and from the outermost layer. When the physical film thickness of the i-th layer is d _i , the formula N = (2n ₁ d ₁ + 2n ₂ d ₂ +... + 2n _{(i−1) / 2} d _{(i−1) / 2} A desired film can be obtained by + n _{(i + 1) / 2} d _{(i + 1) / 2} ) / D.

  As a method for forming the antireflection film, a dry method such as a vacuum deposition method, an ion plating method, a sputtering method, a CVD method (chemical vapor deposition method), a spin coating method, a dip coating method, a roll coating method, A wet method such as a gravure coating method can be used. You may use different methods depending on the layer. When the film thickness accuracy is particularly required for a multilayer film, the dry method is excellent. In the case of vacuum vapor deposition, the vapor deposition source to be used includes electron gun heating, induction heating, resistance heating, and the like. Further, at the time of film formation, a film thickness meter and a film formation speed are monitored using a crystal film thickness meter, an optical film thickness meter or the like. The refractive index of the film is affected by the amount of gas etc. when the film is formed while introducing a gas such as oxygen, nitrogen, etc. Fully manage. Further, plasma treatment, alkali treatment, ion bombardment, or the like may be performed in order to improve the interlayer adhesion between the base material or the hard coat film and the antireflection film or the interlayer adhesion between the antireflection films.

  Further, the antifouling film 16 may be preferably provided on the antireflection film 15 on the surface or both surfaces of the substrate on the side where the photographing apparatus is provided. By providing it on the surface of the antireflection film, cleaning is easy and convenient even when the antireflection plate is contaminated by hand.

  As the antifouling film, a film having a refractive index low enough not to deteriorate the antireflection performance of the antireflection plate and having a film thickness of 50 nm or less, preferably 20 nm or less is preferable. As a material constituting the antifouling film, silicon-based and fluorine-based organic substances are preferably used because of their low refractive index and excellent antifouling performance.

  Next, the present invention will be described in detail with reference to examples.

Example 1
A polycarbonate resin with a thickness of 0.8 mm, which has an acrylic hard coat containing fine particles as a non-glare treatment on one side and a transparent and smooth acrylic hard coat on the other side. Using a plate (Iupilon sheet type: HM11-MR05-552A, manufactured by Mitsubishi Engineering Plastics Co., Ltd.), an antireflection film having the following constitution was formed on both surfaces by vacuum deposition.

λ ₀ = 500 nm, in order from the substrate side,
Medium refractive index film: refractive index 1.74, optical film thickness 0.28λ ₀
First layer (SiO ₂ ): refractive index 1.46, optical film thickness 0.08λ ₀
Second layer (ZrO ₂ ): refractive index 1.90, optical film thickness 0.12λ ₀
Third layer (SiO ₂ ): refractive index 1.46, optical film thickness 0.08λ ₀
High refractive index film:
Fourth layer (TiO ₂ ): refractive index 2.25, optical film thickness 0.43λ ₀
5th layer (ITO): refractive index 2.43, optical film thickness 0.06λ ₀
Low refractive index film:
Sixth layer (SiO ₂ ): refractive index 1.46, optical film thickness 0.27λ ₀
Further, an anti-fouling agent (OF-110: manufactured by Optron Co., Ltd.) was formed on the outermost surface of both surfaces in a physical film thickness of 5 to 10 nm to obtain an antireflection plate.

  As a result of measuring the luminous reflectance of the produced antireflection plate with a photometer (MCPD-3000: manufactured by Otsuka Electronics Co., Ltd.), it was 0.48%. Moreover, as a result of measuring haze with a direct reading haze computer (HGM-2DP: manufactured by Suga Test Instruments Co., Ltd.), it was 6.1%.

Comparative Example 1
Commercially available non-reflective glass with non-glare treatment on both sides was used as an antireflection plate.

  As a result of measuring the luminous reflectance of the antireflection plate with a photometer (MCPD-3000: manufactured by Otsuka Electronics Co., Ltd.), it was 7.0%. Moreover, it was 20.9% as a result of measuring a haze with the direct reading haze computer (HGM-2DP: Suga Test Instruments company make).

Comparative Example 2
The hard-coated polycarbonate resin plate (Iupilon sheet type: HM11-MR05-552A, manufactured by Mitsubishi Engineering Plastics) used in Example 1 was used as an antireflection plate.

  As a result of measuring the luminous reflectance of the antireflection plate with a photometer (MCPD-3000: manufactured by Otsuka Electronics Co., Ltd.), it was 7.6%. Moreover, as a result of measuring haze with a direct reading haze computer (HGM-2DP: manufactured by Suga Test Instruments Co., Ltd.), it was 6.3%.

The antireflection plate obtained in Example 1 and Comparative Examples 1 and 2 was placed on the subject, and the visibility was compared under the following conditions. The results are shown in Table 1.
(1) Reflective characteristics A group photo (photo size: horizontal 127 x vertical 89 (mm), a total of 20 people in total up to 9 people side by side) as a subject is taken outdoors (illuminance of about 17000 lx) with a digital camera (QV-2300UX) : CASIO, resolution: approximately 50 dpi). The degree of reflection of the photograph taken was observed.
(2) Resolution characteristics Using a screen line meter (Printing Society Publishing Department) as a subject, the digital camera (QV-2300UX: manufactured by CASIO, resolution 1600 × 1200 pixels) is used to focus and shoot in an environment with an illuminance of 5000 lx. The bokeh of the line was observed. The subject size was approximately 91 mm (69 dpi) and 79 mm (80 dpi) in the longitudinal direction.

It is the schematic showing the structural example of the holder of this invention. It is the schematic showing the structural example of the support stand of this invention. It is the schematic showing the example of a structure of the reflection preventing plate of this invention.

Explanation of symbols

1: Holder 2: Support base 3: Subject 4: Anti-reflection plate 5: Back plate 6: Hinge 7: Magnet 8: Anti-slip 9: Magnet sheet 10-12: Heart material 13: Substrate 14: Hard coat film 15: Anti-reflection Film 16: Antifouling film

Claims (10)

A method of photographing a sheet-like subject using a photographing apparatus, wherein an antireflection plate having a luminous reflectance of 3% or less and a haze of 10% or less is brought into contact with the photographing surface of the subject to prevent the reflection A photographing method for photographing the subject through a board. The photographing method according to claim 1, wherein photographing is performed using a photographing device having a resolution of 69 dpi or less as the photographing device. An assisting tool for photographing by bringing an antireflection plate into contact with a subject, wherein the antireflection plate has a luminous reflectance of 3% or less and a haze of 10% or less. Shooting aids. The imaging assistance tool according to claim 3, further comprising a mechanism that can freely set the angle of the subject. 5. The plastic substrate is used for the antireflection plate, and the weight of the whole photographing auxiliary tool with respect to the effective imaging area of the antireflection plate is 2 g / cm ² or less. A photography assisting tool described in 1. 6. The photographing assisting tool according to claim 3, wherein the photographing assisting tool does not have a projection of 1.5 mm or more from the antireflection plate on the photographing apparatus side. The antireflection plate further includes a back plate, and has a structure for holding the subject between the antireflection plate and the back plate, and the holding structure of the subject can be held with one hand. It is a possible structure, The photography auxiliary | assistance tool in any one of Claims 3-6. 8. The photographing assisting tool according to claim 7, wherein the back plate has a material or a mechanism that has a luminous reflectance of 10% or less and does not shift a subject. The photographing auxiliary tool according to claim 7 or 8, wherein a magnet is provided on the back plate. 10. The antireflection plate according to any one of claims 3 to 9, wherein a hard coat layer, an antireflection layer, and an antifouling layer are provided in this order on one surface of the plastic substrate on the side to be photographed or on both surfaces of the substrate. A photography assisting tool described in 1.

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