JPH10206613A - Reflecting plate and reflector for stroboscope by using this - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly durable reflecting plate by which a quantity of light of a stroboscope can be improved when it is used as a reflector for a stroboscope and blackening can be restrained by forming a polyparaxylene resin layer on a reflecting surface as a protective resin layer. SOLUTION: A reflecting plate 20 is constituted by forming a polyparaxylene resin layer 01, a silver thin film layer 02, a transparent high polymer film 03, an adhesive layer 04 and a plate-like mold 05 in order in a layer shape. A reflecting surface 99 is the polyparaxylene resin layer surface side. It is desirable that in the polyparaxylene resin layer 01 as a protective resin layer, a dielectric loss tangent to a high frequency of a frequency 100kHz to 10MHz is not more than 0.0025. The polyparaxylene resin layer 01 can be formed by chemically evaporating it on the silver thin film layer 02 by generating diradical paraxylene by thermally decomposing a diparaxylylene solid dimer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reflector, and more particularly, to a reflector which can be suitably used for a reflector for a strobe light, and to the reflector.

[0002]

2. Description of the Related Art Conventionally, as a reflector for a strobe, an aluminum plate having a polished surface formed by sheet metal processing has been used. In recent years, however, a strobe is also used for a simple camera such as a film with a lens. As a result, the weight and size of the electronic flash system have become increasingly important as a whole. In a strobe circuit, a capacitor for discharging a xenon lamp used for the strobe occupies a large proportion. Reducing the size of the capacitor not only reduces the size of the entire strobe system but also lowers the cost and leads to a reduction in cost. It is extremely important. One way to reduce the size of this capacitor is to use silver with a higher reflectivity in place of the polished aluminum in order to allow the light emitted from the xenon lamp to efficiently reach the subject. It can be considered as one solution. The present inventors have disclosed a technique relating to a reflector having a higher reflectivity in the visible light region than aluminum and capable of performing sheet metal working or punching like an aluminum plate (Japanese Patent Laid-Open No. 5-162227). . It is a reflection plate having a transparent polymer film side as a reflection surface, in which a transparent polymer film, a silver thin film layer, an adhesive layer, and a plate-like molded body are sequentially formed. Used as a reflection plate for use. Since this method does not directly expose the surface of the silver thin film to the atmosphere, it solves the problem of corrosion of the surface of the silver thin film and the like, and drastically improves the weather resistance of the reflection plate using silver.

[0003] Therefore, the above-mentioned reflecting plate using silver is punched out for use for a strobe, sheet-metal processed into the shape of a reflecting umbrella for a strobe, and is actually mounted on the strobe as a reflecting plate, and is used 10 to 50 times. Upon light emission, a blackening problem was encountered in which the surface of the polymer film layer of the reflector turned black. It is desired that a reflector actually used does not blacken at least 100 times of light emission.

The inventors of the present invention have conducted intensive studies on the cause of blackening, and found that there is a cause of blackening in a high-frequency high-frequency trigger applied from outside the lamp to induce light emission. It has already been found that blackening can be suppressed by laminating a polymer film having a dielectric loss tangent of 0.0025 or less.

[0005]

However, the suppression of blackening can be realized by laminating polymer films having a dielectric loss tangent in the above-mentioned range, but the light quantity of the strobe does not always increase. When the polymer film is present on the reflection surface, the light emitted by the strobe light reaches the silver thin film as the reflection surface through the polymer film, and is reflected again through the polymer film. The thickness of this polymer film is at least 10 μm or more in order to maintain the strength as a film, and light reflected therethrough is not reflected in a predetermined direction due to being dispersed by impurities in the polymer film, Although the reflectivity of the reflector itself is high, the light quantity of the strobe does not always increase.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a highly durable reflector which can be used as a reflector for a strobe to improve the quantity of light of the strobe and suppress blackening.

[0007]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems. As a result, the polymer film was not used for the reflective surface, and the dielectric tangent was 0.002 for the reflective surface.
By forming a polyparaxylylene resin layer having a thickness of 5 or less as a protective resin layer, it has been found that it is possible to achieve both suppression of blackening and improvement of the amount of light of a strobe, and the present invention has been achieved. In addition, since the polyparaxylylene resin layer can be formed by a chemical vapor deposition method, it can be set to a thickness much smaller than that of the polymer film.

More specifically, the present invention provides (1) at least a polyparaxylylene resin layer (A), a silver thin film layer (B), a transparent polymer film (C), an adhesive layer (D), and a plate-like molded product ( E) is a reflection plate in which the surface of A formed in the order of A / B / C / D / E is a reflection surface. (2) Dielectric loss tangent of the polyparaxylylene resin layer (A) to a high frequency of 100 kHz to 10 MHz. (1) wherein the polyparaxylylene resin layer (A) is formed from a diparaxylylene solid dimer by chemical vapor deposition accompanied by thermal decomposition. The reflector according to (1) or (2), wherein the thickness of the polyparaxylylene resin layer (A) is 0.1 μm to 15 μm.
m, wherein the reflective plate according to any one of (1) to (3), wherein (5) the silver thin film layer (B) is produced by a sputtering method or a vacuum evaporation method ( The reflector according to any one of 1) to (4), (6) the reflector according to (5), wherein the silver thin film layer (B) has a thickness of 70 nm to 500 nm, (7) The plate according to any one of (1) to (6), wherein the plate-like molded body (D) is selected from aluminum, aluminum alloy, stainless steel, copper zinc alloy, and steel;
(8) The reflectance to light rays in the wavelength range of 450 nm to 750 nm is 93% or more (1).
(9) (1) to (7),
It is a reflector for strobe light using the reflector according to any one of (8).

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The reflector of the present invention comprises a polyparaxylylene resin layer (A), a silver thin film layer (B), a transparent polymer film (C), an adhesive layer (D), and a plate-like molded product (A). E) is A /
The surface of A formed in the order of B / C / D / E is a reflecting plate which is a reflecting surface, and can suppress blackening and improve the amount of light of the strobe when used in a strobe reflector.

The present invention will be described below with reference to the accompanying drawings. FIG. 1 is a cross-sectional view showing an example of the structure of the reflector of the present invention. In FIG. 1, 01 is a polyparaxylylene resin layer (A), 02 is a silver thin film layer (B), 03 is a transparent polymer film (C), 04 is an adhesive layer (D), 05
Is a plate-shaped molded product (E). These are sequentially formed in layers to form the reflecting plate 20. The reflection surface is on the polyparaxylylene resin layer surface side, and is in the direction of arrow 99 in the figure.

In the present invention, the transparent polymer film (C)
Becomes a base material when a silver thin film is formed. As the material thereof, polyethylene, polypropylene, polycarbonate, polyimide, polyethersulfone, polystyrene, polyethylene terephthalate, polyetheretherketone, and the like can be used. Can be used as long as it is smooth and a mirror surface can be obtained when a silver thin film is formed. Among them, a polyethylene terephthalate film or a polycarbonate film has a relatively high normal heat resistance and a film having a smooth surface is industrially produced, so that it can be suitably used. In particular, when a film having a high normal heat resistance is required, a polyimide film or a polyethersulfone film can be suitably used.

The thickness of the polymer film is not limited, but is preferably 12 to 250 μm. The optical properties of the polymer film used are not particularly limited, but the surface must be smooth and a mirror surface must be obtained when a silver thin film is formed.

In the present invention, the silver thin film layer (B) is formed on one surface of the polymer film. The silver thin film can be formed by a wet method or a dry method. The wet method is a general term for a so-called plating method, and is a method of depositing silver from a solution to form a film. Specific examples include a silver mirror reaction. On the other hand, the dry method is a general term for a vacuum film forming method, and specific examples include a resistance heating type vacuum deposition method, an electron beam heating type vacuum deposition method, an ion plating method, and an ion beam assisted vacuum deposition method. And a sputtering method. In particular, a vacuum film forming method capable of a roll-to-roll method for continuously forming a film is preferably used in the present invention.

In the vacuum deposition method, a silver raw material is an electron beam,
Melt by resistance heating, induction heating, etc., raise the vapor pressure,
Preferably, 0.1 mTorr (about 13.3 mPa) or more is introduced to cause high frequency or direct current glow discharge.

As the sputtering method, a DC magnetron sputtering method, an rf magnetron sputtering method, an ion beam sputtering method, an ECR sputtering method, a conventional rf sputtering method, a conventional DC sputtering method, or the like can be used. In the sputtering method, a silver plate-shaped target may be used as a raw material, and helium, neon, argon, krypton, xenon, or the like may be used as a sputtering gas, but argon is preferably used. The purity of the gas is
It is preferably at least 99.0%, more preferably 99.5%.
% Or more.

The thickness of the silver thin film layer is preferably from 70 to 500 nm, more preferably from 70 to 300 nm. If it is less than 70 nm, the silver film thickness is not sufficient,
The transmitted light is present and the reflectivity is not sufficient. on the other hand,
Even if the film thickness exceeds 500 nm, the reflectance does not increase and shows a tendency to saturate. In addition, the adhesion of the silver layer to the polymer film is reduced, and cracks are generated when bending as a strobe reflector. It is not preferable.

For measuring the film thickness, there are a stylus roughness meter, a repetitive reflection interferometer, a microbalance, a quartz oscillator method and the like.
The quartz oscillator method is suitable for obtaining a desired film thickness because the film thickness can be measured during film formation. There is also a method in which film formation conditions are determined in advance, a film is formed on a sample substrate, the relationship between the film formation time and the film thickness is examined, and the film thickness is controlled by the film formation time.

The silver thin film layer has gold, copper, nickel, iron, cobalt, tungsten, molybdenum, tantalum, chromium, indium, manganese, and the like that do not deteriorate the performance, particularly, the visible light reflectance. Metal impurities such as titanium may be included.

When the silver thin film layer is provided on the transparent polymer film, the surface of the polymer film may be subjected to corona discharge treatment, glow discharge treatment, surface chemical treatment, surface roughening treatment, etc. It is within the common technical knowledge of those skilled in the art that it is effective in improving the adhesion of the film.

When the above treatment is performed, the transparent polymer film as the base material is heated. Further, since the lamp generates heat when strobe light is emitted, it is preferable that the normal heat resistance temperature of the film is 80 ° C. or higher in order to prevent deformation and discoloration of the transparent polymer film due to heat. More preferably, normal heat resistance temperature 1
It is 00 ° C or higher. The normal heat resistance temperature of polystyrene is 80
Since it is ° C, it can be suitably used as a reflector for strobe light.
Further, since the common heat-resistant temperature of polyethylene is 120 ° C., the common heat-resistant temperature of polypropylene is 130 ° C., and the common heat-resistant temperature of polycarbonate is 120 ° C., these films can be suitably used for a flash reflector.

In the present invention, a polyparaxylylene resin layer (A) is formed further on the silver thin film layer (B). The polyparaxylylene resin layer has a frequency of 100 kHz to 10 kHz.
It is preferable that the dielectric loss tangent for a high frequency of MHz is 0.0025 or less. If the resin layer is not formed, the silver thin film layer is destroyed by the electric shock of the trigger applied when the strobe emits light. On the other hand, if the dielectric loss tangent of the resin layer is higher than 0.0025, the resin layer is deteriorated by the trigger applied when the strobe light is emitted as described above, causing a phenomenon that the resin layer is discolored to black and blackening is not possible. Therefore, it is necessary to select a protective resin material having a small dielectric loss tangent in order to protect the silver thin film layer from electric shock caused by the trigger and to suppress the deterioration of the resin layer itself.

The thickness of the polyparaxylylene resin layer is 0.1.
It is preferably 1 μm to 15 μm, more preferably 0.3 μm.
μm to 15 μm. If the thickness of the layer is too thin, it does not serve to protect the silver thin film layer, and if it is too thick, the amount of reflected light decreases due to the long distance of emitted light passing through the resin layer. In addition to this, it is not preferable because the bending process performed when processing into a reflector for a strobe tends to cause cracking or peeling.

Polyparaxylylene resin can be suitably used in the present invention as a resin material from which a relatively thin film can be easily formed. The dielectric loss tangent of the polyparaxylylene resin is as extremely small as 0.0002 at a frequency of 1 MHz, and since it has bending resistance, it can be bent. Further, since a polyparaxylylene resin can be formed into a thin film by performing chemical vapor deposition, a thin film having a desired thickness can be easily formed. The dielectric loss tangent is 0.
Materials smaller than 0025 include, for example, resins such as polyethylene and polypropylene. However, it is difficult to form these as a thin film, and there has been no other way but to bond these resin films. However, the thickness of the resin film was usually 12 μm or more, and could not be made thinner.

The polyparaxylylene resin has the following formula (1)
It is a polymer material represented by (Chemical Formula 1) and has a molecular weight of 50
It is about ten thousand. As the polyparaxylylene resin, a diparaxylylene solid dimer represented by the following formula (2) (formula 2) is introduced into a vacuum chamber, which is thermally decomposed to generate a diradical paraxylylene, which is adsorbed on a substrate. This can be formed. The thermal decomposition temperature is about 680 ° C., and the thermally decomposed diradical p-xylylene may be introduced to the surface of the base material and adsorbed. There is no particular need to heat the substrate, and the substrate temperature may be room temperature. The feature of this method is that no special polymerization treatment is required because the polymerization proceeds simultaneously with the adsorption to the substrate, and a resin thin film having a desired thickness can be easily formed. The thickness of the resin layer can be controlled by controlling the amount of diparaxylylene as the resin material and by controlling the formation time.

[0025]

Embedded image

[0026]

Embedded image

In the present invention, the transparent polymer film (C) and the plate-like molded body (E) are bonded and integrated by an adhesive layer (D). The adhesive used here is heat or catalyst assisted. Specifically, a general adhesive such as a silicone adhesive, a polyester adhesive, an epoxy adhesive, and a cyanoacrylate adhesive can be used. Silicone-based adhesives and polyester-based adhesives are excellent in heat resistance and electrical properties, and thus can be suitably used for a strobe reflector for applying a trigger. Epoxy-based adhesives are excellent in strength and heat resistance, and therefore can also be suitably used. The cyanoacrylate-based adhesive is excellent in quick action and strength, and can be used for efficient reflection plate production. These adhesives are roughly classified into a thermosetting type, a hot-melt type, and a two-component mixing type depending on the bonding method, and a thermosetting type or a hot-melt type which can be continuously produced is preferably used. The thickness of the adhesive layer is not particularly limited, but is usually 0.5 μm to 50 μm, preferably 1 μm to
It is about 20 μm.

Aluminum, aluminum alloy, stainless steel, copper-zinc alloy, steel and the like are used for the plate-shaped molded product (E). These metals have their advantages and can be used as follows. . Aluminum is lightweight and excellent in workability, and has a high thermal conductivity and can effectively release the heat applied to the atmosphere, so that it can be suitably used as a reflector for a strobe in which a reflector is heated by lamp emission. . Aluminum alloys are lightweight and have high mechanical strength, and thus can be suitably used for strobe reflectors. Since stainless steel has high mechanical strength and excellent corrosion resistance, it can be suitably used as a reflector for strobe light.
A copper-zinc alloy, that is, brass or brass, has high mechanical strength and is easy to solder, so that it is easy to take a trigger terminal, and this can also be suitably used for a strobe reflector. Since steel is inexpensive, it is preferably used when it is necessary to reduce costs.

The thickness of the plate-like molded product is generally about 0.1 to 1 mm, although it depends on the workability of the metal. If it is too thin, it cannot function as a support, and if it is too thick, it cannot be bent into the shape of a flash reflector, which is not preferable.

The adhesion between the polymer film and the plate-like molded product is as follows:
The coating is performed by a procedure of coating the silver thin film layer with an adhesive, drying, and laminating the silver thin film layer with a plate-shaped molded body using a roller. There are many methods for coating the adhesive depending on the type of the base material and the adhesive, but the gravure coater method and the reverse coater method are widely used. In the gravure coater method, coating is performed by rotating a gravure roll partially immersed in an adhesive and bringing a film sent by a backup roll into contact with the gravure roll to which the adhesive is attached. The coating amount can be adjusted by controlling the number of rotations of the roll and the viscosity of the adhesive. The reverse coater method is similar to the gravure roll method, but the amount of the adhesive adhering to the coating roll is adjusted by a metering roll installed in contact with the coating roll. The drying temperature and the laminating temperature of the coated adhesive vary depending on the type of the adhesive, but are around 100 ° C. when the above-mentioned general adhesive is used.

It is desirable that the adhesive strength between the transparent polymer film having the silver thin film layer formed thereon and the plate-like molded article, measured by a 180 degree peel strength, is 100 g / cm or more. If the adhesion strength is not reached, when a sheet metal is processed as a strobe reflector, peeling of the transparent polymer film on which the silver thin film layer is formed from the plate-like molded body occurs,
Causes deformation.

The reflectivity of the reflector thus manufactured is typically 93% or more for light having a wavelength of 550 nm, and more specifically, 93% in the range of 450 nm to 750 nm.
% Or more.

In order to manufacture a strobe reflector using the reflector thus fabricated, a conventional method of processing an aluminum plate into a strobe reflector can be applied as it is. It is formed by cutting a reflecting plate into a shape obtained by expanding a reflecting umbrella in a plane, and bending the cut flat plate (Japanese Patent Laid-Open No. 55-118002). This method is used for a film with a lens and the like because the production cost is low.

The configuration of the reflector of the present invention and a typical method for evaluating the electrical characteristics will be described below. The thickness of each part of the transparent polymer film, the silver thin film layer, the adhesive layer, and the plate-like molded body can be directly measured by observing the cross section with a transmission electron microscope (TEM). Material analysis of the polymer film can be performed by infrared spectroscopy (IR). In the material analysis of the adhesive, the silver thin film layer and the plate-shaped molded body are peeled off to expose the adhesive, and the adhesive is dissolved in an appropriate solvent to prepare a sample, and infrared spectroscopy (IR) of the sample is taken. That can be done. Material analysis of the silver thin film layer and the plate-like formed body can be performed by X-ray fluorescence spectroscopy (XRF). Further, an X-ray microanalyzer (EPMA) can perform elemental analysis of a portion finer than X-ray fluorescence spectroscopy. If the polymer film on which the silver thin film layer is formed is peeled off from the adhesive layer to expose the silver thin film layer, composition analysis is performed by Auger electron spectroscopy (AES), and the thickness is obtained by taking a depth profile. be able to. The dielectric constant and the dielectric loss tangent of the polyparaxylylene resin layer can be measured by a method according to JIS-K-6911. If accuracy is required, a mutual induction bridge method (transformer bridge method), or simply a voltage rise ratio method (Q meter method) is used.

[0035]

EXAMPLES Examples of the embodiments of the present invention will be described below with reference to examples. In addition, the total light transmittance, the reflectance, and the dielectric loss tangent described in the examples were measured by the following devices and methods. -Total light transmittance and reflectance: Measured with a spectrophotometer (U-3400, manufactured by Hitachi, Ltd.). -Dielectric loss tangent: A dielectric loss measuring device (manufactured by Ando Electric Co., Ltd .: C) by the bridge method according to JIS-K-6911.
R-10). As a measurement sample, a resin formed on an aluminum foil was used, and the aluminum foil itself was used as it was as an electrode. In the case where the resin was in the form of a film, the electrode was measured using mercury as it was. The measurement is performed at room temperature and the measurement frequency is 1 MHz, 5
The average of the measurements was taken.

Hereinafter, FIGS. 2 and 3 show schematic views of strobes for photographing in Examples 1 to 8 and Comparative Examples 1 to 10. Here, (FIG. 2) shows a cross section of a strobe structure in which a reflector is brought into contact with a xenon tube, and (FIG. 3) shows a view seen from the back side of a light emitting surface of the strobe structure in which a reflector is brought into contact with a xenon tube. ing. In the figure, 10 is a xenon lamp, 20 is a reflector, and 30 is a trigger terminal. Note that FIG. 4 shows a light emitting circuit for emitting a flash. A voltage charged by an electric field capacitor is applied to the xenon lamp, and a high voltage is applied to the trigger terminal to induce light emission.
Apply a high frequency trigger. Here, the voltage applied to the xenon lamp, the voltage applied to the trigger terminal, and the frequency may be set to appropriate values that allow the xenon lamp to emit light.

Example 1 99.9% pure silver was vapor-deposited on a polyethylene terephthalate film (thickness: 50 μm, total light transmittance = 87%) by an electron beam vacuum vapor deposition method. The thickness of the silver layer was measured with a quartz crystal film thickness monitor to be 150 nm. On the silver thin film side of the film, a resin layer made of polyparaxylylene resin (manufactured by Nippon Parylene Co., Ltd., product name: Parylene N) was formed by vaporizing diparaxylylene and then performing chemical vapor deposition accompanied by thermal decomposition. The thickness of the polyparaxylylene resin layer was 1 μm as measured by measuring the height of a step in a portion with or without a thin film using a stylus roughness meter. Next, an aluminum plate (thickness: 0.3 mm) as a plate-like molded body is adhered to the surface opposite to the surface on which the silver thin film layer and the polyparaxylylene resin layer are formed using a polyester-based hot-melt adhesive, A reflector was formed.

By forming it into a reflector for a strobe reflector by sheet metal processing, the xenon lamp and the polyparaxylylene resin layer side are fixed in contact with each other, and the trigger terminal of the strobe light emitting circuit is connected to the aluminum plate of the reflector. And a strobe for photographing.

(Examples 2 to 5) The thickness of the protective resin layer was 0.1 μm (Example 2), 0.3 μm (Example 3),
A reflector and a strobe were manufactured in the same manner as in Example 1 except that the thickness was 5 μm (Example 4) and 15 μm (Example 5).

(Examples 6 to 8) The thickness of the silver thin film layer was set to 70 nm (Example 6), 300 nm (Example 7), 50 nm.
A reflector and a strobe were manufactured in the same manner as in Example 1 except that the thickness was set to 0 nm (Example 8).

(Comparative Example 1) A mirror-polished aluminum plate (SL type, 0.3 mm in thickness, manufactured by Sumitomo Light Metal Co., Ltd.) used for a reflector of a conventional strobe was used.
A strobe was made.

(Comparative Examples 2 to 4) The polyparaxylylene resin layer was not formed (Comparative Example 2), and the thickness was 0.0
A reflector and a strobe were manufactured in the same manner as in Example 1 except that the thickness was set to 5 μm (Comparative Example 3) and 25 μm (Comparative Example 4).

Comparative Example 5 A polyethylene film (thickness: 25 μm, visible light transmittance: 92%) was used as a protective resin layer instead of the polyparaxylylene resin layer, and a polyester adhesive was applied on the silver thin film layer. A reflector and a strobe were manufactured in the same manner as in Example 1 except that they were bonded together.

(Comparative Examples 6 to 8) Instead of a polyparaxylylene resin layer, a polyethersulfone film (thickness: 25 μm, visible light transmittance: 91) was used as a protective resin layer.
%) (Comparative Example 6), polyethylene terephthalate film (thickness: 25 μm, visible light transmittance: 92%) (Comparative Example 7), polycarbonate film (thickness: 50 μm, visible light transmittance: 93%) (Comparative Example) A reflector and a strobe were manufactured in the same manner as in Comparative Example 5 except that the method was changed to 8).

(Comparative Examples 9 to 10) The thickness of the silver thin film layer was set to 50 nm (Comparative Example 9) and 1000 nm (Comparative Example 10).
A reflector and a strobe were produced in the same manner as in Example 1 except that the above conditions were satisfied.

The brightness of the strobe for photographing formed in Examples 1 to 8 and Comparative Examples 1 to 10 was measured according to JIS-B-
The evaluation was made based on the guide number measured according to 7093. The higher the guide number (abbreviation: GN, unit: m), the brighter the strobe. Further, in order to evaluate the light emission durability of the strobe, in the strobe circuit described with reference to FIG. 4, the voltage applied to the xenon lamp is 320 V, the voltage applied to the trigger terminal is 15 kV in peak-peak value, and the frequency is 1 MHz. , The xenon lamp was repeatedly emitted at intervals of 30 seconds, and the strobe reflection surface was observed every 10 times, and the number of times the blackening phenomenon was observed was recorded as the number of lifetime emission.

The reflectivity of the reflectors, the dielectric loss tangent of the protective resin layer material, the guide number of the strobe, and the number of times of light emission of the strobes prepared in Examples 1 to 8 and Comparative Examples 1 to 10 are shown in Table 1 below. It is shown in Table 2).

[0048]

[Table 1]

[0049]

[Table 2]

From the above results, the strobe reflectors according to the present invention shown in Examples 1 to 8 have guide numbers of 10.9 to 10.
11.2 m and a strobe (guide number: 10.0) using a conventionally used mirror-polished aluminum plate
m). That is, according to the present invention, the amount of light of the strobe can be increased without increasing the emission voltage or increasing the size of the arc tube. In other words, it can be seen that even if the size is reduced, it is possible to manufacture a strobe which can obtain the same light amount.

The lifespan of the flash umbrella using the reflector of the present invention is 100 times or more, especially 300 times or more if the thickness of the polyparaxylylene resin layer as the protective resin layer is optimized. Yes, it can be used sufficiently practically.

[0052]

According to the present invention, it is possible to provide a reflector which can be preferably used for a reflector for a strobe, which has high durability and an improved strobe light amount, which suppresses blackening.

[Brief description of the drawings]

FIG. 1 is a structural sectional view showing an example of a reflector of the present invention.

FIG. 2 is a cross-sectional view showing an example of a strobe structure in which a reflector is brought into contact with a xenon tube.

FIG. 3 is a view seen from the back side of a light emitting surface of a strobe structure in which a reflector is brought into contact with a xenon tube.

FIG. 4 is a diagram showing a strobe light emitting circuit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 01 Polyparaxylylene resin layer 02 Silver thin film layer 03 Transparent polymer film 04 Adhesive layer 05 Plate-shaped body 10 Xenon lamp 20 Reflector 30 Trigger terminal 99 Reflective surface

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI F21V 7/22 F21V 7/22 CD G02B 5/10 G02B 5/10 C G03B 15/05 G03B 15/05 (72) Inventor Shin Fukuda 1190 Kasama-cho, Sakae-ku, Yokohama-shi, Kanagawa Prefecture Mitsui Toatsu Chemicals Co., Ltd.

Claims (9)

[Claims] At least a polyparaxylylene resin layer (A), a silver thin film layer (B), a transparent polymer film (C),
The adhesive layer (D) and the plate-like molded product (E) are A / B / C / D /
A reflector in which the surface of A formed in the order of E is a reflection surface. 2. The polyparaxylylene resin layer (A) 10
The dielectric loss tangent for a high frequency of 0 kHz to 10 MHz is 0.
2. The reflector according to claim 1, wherein the thickness is not more than 0025. 3. The reflector according to claim 1, wherein the polyparaxylylene resin layer (A) is formed from a diparaxylylene solid dimer by chemical vapor deposition accompanied by thermal decomposition. 4. The reflection plate according to claim 1, wherein the thickness of the polyparaxylylene resin layer (A) is 0.1 μm to 15 μm. 5. The silver thin film layer (B) is produced by a sputtering method or a vacuum evaporation method.
5. The reflector according to any one of items 1 to 4. 6. The silver thin film layer (B) has a thickness of 70 nm to 50 nm.
The reflector according to claim 5, wherein the thickness is 0 nm. 7. The reflection according to claim 1, wherein the plate-shaped formed body (D) is selected from aluminum, aluminum alloy, stainless steel, copper zinc alloy, and steel. Board. 8. The reflector according to claim 1, wherein a reflectance of the light in a wavelength range of 450 nm to 750 nm is 93% or more. 9. A reflector for strobe light using the reflector according to claim 1. Description: