JP5658911B2 - Reflecting member and lighting apparatus using the reflecting member - Google Patents

Description

  The present invention relates to a reflecting member that includes silver and has a reflecting surface that reflects incident light, and a lighting fixture using the reflecting member.

  Conventionally, silver having excellent light reflectivity has been used for a reflective layer of a reflective member that reflects light from a light source of a lighting fixture. In particular, when silver having a high reflectance is used for a deep bowl-shaped reflecting member such as a downlight, light is repeatedly reflected in the reflecting member, and the light utilization efficiency can be improved. However, silver is chemically unstable and tends to discolor. The discoloration of silver in the reflecting member not only deteriorates the appearance of the reflecting member but also reduces the reflectance and reduces the light utilization efficiency.

  As a cause of discoloration of silver, light (particularly ultraviolet rays), heat, and moisture in the atmosphere, sulfurous acid gas, hydrogen sulfide, ammonia, and other gases can be cited. Generally, these causes of discoloration interact, and silver atoms on the reflecting member surface react with sulfide ions, chloride ions, etc., and change into compounds such as silver sulfide, silver chloride, etc. It is thought to change to black.

  One of the causes of silver discoloration is that the silver thin film has a “window” of transmittance that transmits light in the ultraviolet region near the wavelength of 325 nm (see, for example, Patent Document 1). . In the above-mentioned Patent Document 1, ultraviolet rays that have passed through the “window” of the transmittance deteriorate the resin undercoat layer in contact with the silver, and “small bubbles” of carbon dioxide gas are generated. It describes the discoloration of silver.

  Therefore, in the reflective member described in Patent Document 1, by forming a polymer layer containing an organic ultraviolet absorber, the ultraviolet light incident on the reflective layer is shielded, and the ultraviolet light to the “window” having the above transmittance is formed. Is prevented and silver discoloration is suppressed. Further, it is known that a benzotriazole-based ultraviolet absorber used as an ultraviolet absorber forms a yellow color by forming a chelate with silver. Therefore, the first polymer layer containing mercaptan is formed on the reflective layer, and the second polymer layer containing the ultraviolet absorber is formed thereon, whereby the benzotriazole-based ultraviolet absorber is directly reflected on the silver reflective layer. I try not to react with.

Furthermore, a reflective member that prevents ultraviolet light from entering the reflective layer by suppressing the discoloration of silver by covering the reflective layer with a topcoat layer containing an ultraviolet-absorbing solid instead of an organic ultraviolet absorber. It is known (see, for example, Patent Document 2).
Japanese Patent Laid-Open No. 61-154942 Japanese Patent Laid-Open No. 7-108643

  However, it is known that benzotriazole-based ultraviolet absorbers diffuse in the polymer and chelate with silver to develop a yellow color. Therefore, when the reflective member described in Patent Document 1 is used for a long period of time, the benzotriazole-based UV absorber contained in the first polymer layer penetrates into the second polymer layer, reaches the reflective layer, There is a risk of discoloring silver. In addition, many of the benzotriazole-based ultraviolet absorbers cannot sufficiently block ultraviolet rays near the wavelength of 320 nm because the light absorption peak around the wavelength of 320 nm corresponding to the “window” of the transmittance is reduced.

  In addition, since the UV-absorbing solid substance described in Patent Document 2 is a particulate substance, when added to the topcoat layer, visible light scattering occurs and the transmittance of the topcoat layer decreases. In addition, the reflectivity of the reflecting member may be reduced.

  This invention solves the said subject, Comprising: The reflecting member which can suppress discoloration of silver over a long period, without reducing the reflectance of visible light, and a lighting fixture using this reflecting member The purpose is to provide.

To solve the above problems, the reflecting member according to the present invention comprises a substrate, before provided via an undercoat layer formed on the Kimoto material comprises silver, a reflecting surface for reflecting the incident light a reflective layer having has a light absorption peak which absorbs causes interference light in the range of wavelengths 250 to 420 nm, are laminated between the front Symbol undercoat layer and the reflective layer, or the reflective surface of the reflective layer And a light blocking layer.

  In the reflecting member according to the present invention, it is preferable that the light blocking layer has an ultraviolet transmittance of about 20% or less near a wavelength of 320 nm.

  Preferably, the light blocking layer is formed as an optical multilayer film.

  Moreover, the lighting fixture which concerns on this invention uses the said reflection member.

  According to the reflecting member of the present invention, light in the wavelength range of 250 to 420 nm is absorbed in the light blocking layer, so that the discoloration of silver contained in the reflecting layer is prolonged without reducing the reflectance of visible light. It can be suppressed over a period of time, and by using this reflecting member, a lighting fixture with good light utilization efficiency can be obtained.

(A) is a side view of the lighting fixture using the reflective member which concerns on the 1st Embodiment of this invention, (b) is the top view. The fragmentary sectional side view of the reflection member. The figure which shows the structural example (1) of the light-shielding layer in the reflection member. The figure which shows the structural example (2) of the light-shielding layer in the reflection member. The figure which shows the total light transmittance in the structural example (1) of the said light shielding layer. The figure which shows the total light transmittance in the structural example (2) of the said light shielding layer. The figure which shows the relationship between the irradiance emitted from the light source used by this embodiment, and wavelength distribution. The figure which shows the relationship between the irradiance emitted from the light source at the time of applying the reflection member using the light shielding layer shown in FIG. 5, and wavelength distribution. The figure which shows the relationship between the film thickness of silver in a reflection member, and a total light transmittance. (A)-(c) is a sectional side view explaining the discoloration mechanism of silver. The fragmentary sectional side view of the reflection member which concerns on the 2nd Embodiment of this invention. The fragmentary sectional side view of the reflection member which concerns on the 3rd Embodiment of this invention.

  A reflecting member and a lighting fixture using the reflecting member according to the first embodiment of the present invention will be described with reference to FIGS. The lighting fixture 2 using the reflecting member 1 of the present embodiment is a lighting fixture used in a general facility, store, house, etc., and here, as shown in FIGS. Shows a built-in spotlight. The luminaire 2 includes a light source 3 and a reflecting member 1 for reflecting light from the light source 3. The reflection member 1 is formed in a bowl shape extending from a socket part 1a where a socket 4 for attaching a light source 3 is provided to a central part 1b and an opening part 1c in the light emitting direction. The socket part 1a is connected to the main body part 5 of the lighting fixture 2, and a leaf spring 6 for locking the lighting fixture 2 to the back of the ceiling is attached to the opening 1c. The main body 5 is provided with an appropriate ballast 7 or the like that matches the light source 3.

  As shown in FIG. 2, the reflection member 1 includes a base material 11, an undercoat layer 12 formed on the base material 11, and a reflective layer 14 that includes silver and has a reflective surface 13 that reflects incident light. And a light blocking layer 15 having a light absorption peak wavelength for absorbing and absorbing light in a wavelength range of 250 to 420 nm.

  The substrate 11 is not particularly limited as long as it is made of a material that can withstand the heat generated from the light source 3. Moreover, the shape of the base material 11 is not limited to the above-described ridge shape, and is formed so as to efficiently reflect light from the light source 3 and realize a desired light distribution according to the specifications of the lighting fixture 2 and the like. Anything is acceptable.

  When the substrate 11 is formed of a resin material, examples of the thermoplastic resin include polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyphenylene sulfide (PPS), and polyphenylene oxide (PPO). ), Polyimide (PI), polyetherimide (PEI), polycarbonate (PC), liquid crystal polymer (LCP), syndiotactic polystyrene (SPS), and the like. Moreover, as a thermosetting resin, the unsaturated polyester (UP) etc. which are generally used as a material for bulk molding compounds (BMC) are used, for example. In order to improve light reflection performance, heat resistance, strength, light resistance and the like, these resin materials may be added with various additives such as inorganic fillers. A known method such as injection molding, compression molding, vacuum molding, pressure molding, or the like is selectively used as the molding method of the base material 11 depending on the material and the shape of the instrument.

  When the base material 11 is formed of a metal material, for example, an aluminum (Al) base alloy, a magnesium (Mg) base alloy, an iron (Fe) base alloy, a zinc (Zn) alloy, or the like is used. As the forming method, spinning, pressing, die casting, thixo molding, or the like is selectively used in consideration of the material and the required shape of the reflecting member 1 and the like. Moreover, when using glass as the base material 11, press work, blow work, etc. are used. The surface of the substrate 11 is desirably a smooth and clean surface, and the mold release agent, gas mark, lubricant, oil, etc. adhering during molding are removed by physical or chemical means.

  The undercoat layer 12 is formed to improve the adhesion between the substrate 11 and the reflective layer 14 and improve the smoothness of the substrate 11. Therefore, if the base material 11 consists of resin materials and adhesiveness with the reflective layer 14 and smoothness are fully ensured, it does not necessarily need to be formed. The undercoat layer 12 is formed from a coating film made of a resin material such as an acrylic resin, a silicone resin, a fluororesin, an epoxy resin, or a melamine resin. As the film forming method, a known method such as spray coating, spin coating, roll coating, dip coating or the like is selectively used. Moreover, well-known means, such as a heat | fever, an ultraviolet-ray, an electron beam, are used for the hardening method. In addition, although the film thickness of the undercoat layer 12 is not specifically limited, For example, 5-30 nm is desirable. If the thickness of the undercoat layer 12 is 30 nm or more, there is a possibility that the shape of the base material 11 designed in advance in consideration of the light irradiation direction may be affected.

  The reflective layer 14 is formed by forming silver or an alloy containing silver as a main component with a thickness of 20 to 1000 nm. As a forming method, a PVD method such as a sputtering method, a vacuum deposition method, or an ion plating method is used, and a chemical precipitation method such as a silver chain reaction may be used. Silver or an alloy containing silver as a main component may be laminated on the reflective surface 13 side of the reflective layer 14 with a thickness of 20 nm or more. In order to improve the heat resistance and adhesion of the reflective layer 14, the component on the base material 11 side of the reflective layer 14 may contain a metal other than silver, such as aluminum, copper, or nickel.

  The light blocking layer 15 includes optical multilayer films 15a and 15b obtained by laminating a plurality of inorganic substances with a predetermined thickness. The light blocking layer 15 absorbs light by interfering light reflected by each layer by controlling the type, thickness, and number of layers of the laminated material, and a desired light absorption peak ( An under peak of light transmittance at a desired wavelength) is set. In the present embodiment, the light absorption peak is formed in a wavelength range of 250 to 400 nm.

Examples of the inorganic material of the forming material include silicon oxide (SiO ₂ ), titanium oxide (TiO ₂ ), zirconium oxide (ZrO ₂ ), niobium oxide (Nb ₂ O ₅ ), tantalum oxide (Ta ₂ O ₅ ), and fluoride. Magnesium (MgF ₂ ), indium tin oxide (ITO), aluminum oxide (Al ₂ O ₃ ), magnesium oxide (MgO), zinc oxide (ZnO), hafnium oxide (HfO), or the like is used. As a method for forming the light blocking layer 15, a PVD method such as a sputtering method, a vacuum deposition method, or an ion plating method is used. If the light blocking layer 15 has the same effect as described above, for example, zinc oxide (ZnO), selenium oxide (CeO), titanium oxide (Ti02), etc. have light absorption characteristics at a wavelength of 250 to 400 nm. The material itself may be formed as a single layer.

FIG. 2 shows a configuration example (1) of the optical multilayer film of the light blocking layer 15 in which 11 layers of titanium oxide (TiO ₂ ) and silicon oxide (SiO ₂ ) are stacked. FIG. 3 shows the film thickness of each layer in the configuration example (1). FIG. 4 shows the film thickness of each layer in the configuration example (2) of the optical multilayer film of the light blocking layer 15 in which eleven layers of zirconium oxide (SiO ₂ ) and silicon oxide (SiO ₂ ) are stacked.

  FIG. 5 shows light transmission characteristics in the configuration example (1) of the multilayer film of the light blocking layer 15 shown in FIG. According to this configuration, a light absorption peak wavelength that has a low light transmittance at a wavelength of 250 to 420 nm, that is, absorbs light in a wavelength range of 250 to 420 nm can be obtained. In particular, the light transmittance in the wavelength range of 300 to 400 nm is 30% or less, and the transmittance of ultraviolet rays near the wavelength of 320 nm is 20% or less. FIG. 6 shows light transmission characteristics in the configuration example (2) of the multilayer film of the light blocking layer 15 shown in FIG. Also in this configuration, a light absorption peak wavelength that absorbs light in the wavelength range of 250 to 420 nm is obtained, the light transmittance in the wavelength range of 300 to 400 nm is 30% or less, and the transmittance of ultraviolet rays in the vicinity of the wavelength of 320 nm is 20%. % Or less.

  A general-purpose fluorescent lamp is used as the light source 3 of the lighting fixture 2. FIG. 7 shows an example of the wavelength distribution of the irradiation light of the light source 3 used in this embodiment. From the figure, it is recognized that the irradiation light of the light source 3 not only has a strong peak wavelength in the visible light region, but also has a peak wavelength in the ultraviolet region. FIG. 8 shows an example of the wavelength distribution of irradiation light in the lighting fixture 2 using the reflecting member 1 provided with the light blocking layer 15 shown in FIG. In FIG. 8, it is confirmed that the peak of the wavelength component having a wavelength of 420 nm or less is smaller than that in FIG. That is, since the light blocking layer 15 absorbs light having a wavelength of 250 to 420 nm, ultraviolet rays included in the irradiation light in the lighting fixture 2 are reduced.

  Here, in the lighting fixture 2 using the reflective layer 14 containing silver, the mechanism etc. in which silver discolors are demonstrated with reference to FIG.9 and FIG.10.

  FIG. 9 shows a change in light transmittance due to a difference in film thickness when pure silver having a purity of 99.99% is formed on a base material made of quartz by using a magnetron sputtering method. From this figure, it is confirmed that when the film thickness of the silver film is reduced, there is a so-called “transmission” window in which the transmittance of ultraviolet rays in the wavelength range of 250 nm to 420 nm increases. This “window” of transmittance is confirmed in an example in which the ultraviolet region near the wavelength of 320 nm is the peak and the film thickness is 170 nm. As the film thickness is reduced, both the wavelength region and the transmittance are increased. In the example where the film thickness is 65 nm, the transmittance of light having a peak at a wavelength of 320 nm reaches 27%. In this case, about 30% of the ultraviolet light having a wavelength of about 320 nm out of the ultraviolet light emitted from the light source is formed under the silver film (the reflective layer 14 of the present embodiment) without being reflected or absorbed by the silver film. It reaches the surface of the layer (undercoat layer 12 of this embodiment).

The ultraviolet rays that have passed through the reflective layer 14 and reached the surface of the undercoat layer 12 degrade the resin of the undercoat layer 12 as shown in FIG. 10 (a), resulting in hydroxy radicals (.OH) and peroxy radicals. (.OR) is generated. Then, the generated .OH or .OR oxidizes silver atoms (Ag) of the reflective layer 14 in contact with the undercoat layer 12 to generate silver ions (Ag ⁺ ) as shown in FIG. In the example, only OH is shown). The generated Ag ⁺ diffuses into the undercoat layer, and OH diffuses into the undercoat layer 12 as OH ⁻ . Then, as shown in FIG. 10 (c), these Ag ⁺ and OH ^- and react, by dark brown silver oxide _(Ag 2 0) is generated, discoloration of silver occurs.

  On the other hand, in the present embodiment, the light in the wavelength range of 250 to 420 nm among the light emitted from the light source 3 is absorbed by the light blocking layer 15. Therefore, light in the wavelength range of 250 to 420 nm does not reach the interface between the reflective layer 14 and the undercoat layer 12, and silver discoloration can be suppressed.

  Further, in the present embodiment, ultraviolet rays can be blocked without using an ultraviolet absorber or the like, and ultraviolet rays having a wavelength of about 320 nm that cannot be sufficiently shielded by conventional benzotriazole ultraviolet absorbers are absorbed. can do. Therefore, the reflective layer 14 containing silver is thin, and even in the reflective layer 14 having the transmittance “window”, ultraviolet rays having a wavelength of about 320 nm may reach the interface between the reflective layer 14 and the undercoat layer 12. No discoloration of silver can be suppressed.

  In addition, unlike the benzotriazole-based ultraviolet absorber, a chelate with silver is not produced and discolored, so that the discoloration of silver can be suppressed over a long period of time. Furthermore, when a layer containing an ultraviolet absorber is formed, a part of the short wavelength region of the visible light emitted from the light source 3 is absorbed or diffused by the ultraviolet absorber. The reflectivity may decrease. On the other hand, in this embodiment, since light in the wavelength range of 250 to 420 nm is absorbed without using an ultraviolet absorber or the like, it is possible to prevent a reduction in the reflectance of visible light in the short wavelength region, and to use light efficiently. Can be increased.

  Of the light emitted from the light source 3, light in a wavelength region that is not absorbed by the light blocking layer 15, that is, visible light, is transmitted by the light blocking layer 15 and then reflected by the reflecting surface 13 including silver having a high reflectance. The light is emitted from the end of the reflecting member 1 in the light emitting direction. Therefore, according to the reflecting member 1 of the present embodiment, silver discoloration can be suppressed over a long period of time without reducing the reflectance of visible light. Further, by using this reflecting member, it is possible to obtain a lighting fixture in which the light utilization efficiency is hardly lowered.

  Next, a reflecting member according to a second embodiment of the present invention will be described with reference to FIG. In the reflecting member 1 of this embodiment, a light blocking layer 15 having a light absorption peak in the wavelength range of 250 to 420 nm is formed between the undercoat layer 12 and the reflecting layer 14. Each layer is the same as that of the said 1st Embodiment except the order to laminate | stack. In the reflecting member 1 of this embodiment, a top coat layer 16 is formed on the reflecting surface 13 of the reflecting layer 14 in order to protect the reflecting layer 14.

In addition, the topcoat layer 16 is formed from the coating film which consists of resin materials, such as an acrylic resin, a silicone resin, a fluororesin, an epoxy resin, or a melamine resin similarly to the undercoat layer 12, for example. As with the undercoat layer 12, a known coating method such as spray coating, spin coating, roll coating, dip coating, or the like is used. In addition, although the well-known means, such as a heat | fever and an electron beam, is used for the hardening method, the means which does not affect the reflection layer 14 is desirable. The topcoat layer 16 may be a laminate of a plurality of resin layers. Further, the top coat layer 16 may be formed by vacuum deposition or the like of a layer made of an inorganic material such as SiO ₂ or TiO ₂ . Further, a layer made of this inorganic material may be provided between the reflective layer 14 and the top coat layer 16.

  According to this configuration, even if light having a wavelength in the range of 250 to 420 nm passes through the “window” of the transmittance of the reflective layer 14, the light blocking layer 15 is interposed between the reflective layer 14 and the undercoat layer 12. Therefore, silver discoloration can be suppressed at the interface between the reflective layer 14 and the undercoat layer 12.

  Next, a reflecting member according to a third embodiment of the present invention will be described with reference to FIG. In the reflecting member 1 of this embodiment, a top coat layer 16 is formed on the light blocking layer 15 of the first embodiment in order to protect the light blocking layer 15. The top coat layer 16 having the same configuration as that of the second embodiment is formed by the same method.

  According to this configuration, similarly to the first embodiment, light in the wavelength range of 250 to 420 nm is absorbed by the light blocking layer 15, so that it reaches the interface between the reflective layer 14 and the undercoat layer 12. No discoloration of silver can be suppressed. In addition, since the light blocking layer 15 made of a metal thin film is protected by the top coat layer 16, the durability of the reflecting member 1 can be improved.

<Example 1>
Example 1 corresponds to the reflecting member 1 of the first embodiment. Polybutylene terephthalate (PBT) resin (Toray Industries, Inc. (Toraycon 1401 × 06)) is molded into a downlight reflector (Panasonic Electric Works (see FIGS. 1A and 1B)) by an injection molding method. This was used as the base material 11. The approximate dimensions at this time are: opening: 170 mm, height: 200 mm. Next, an acrylic melamine paint was spray-applied to the substrate 11 and then baked and dried at 180 ° C. for 30 minutes to form an undercoat layer 12 having a film thickness of 15 μm. After the undercoat layer 12 was formed, Ag (purity 99.99%) was DC magnetron sputtered in an argon (Ar) gas atmosphere to form the reflective layer 14. The thickness of the reflective layer 12 was an opening 1c: 150 nm, a height direction center 1b: 100 nm, and a socket 1a: 50 nm (see FIG. 1A).

  After the reflective layer 12 was formed, the light blocking layer 15 was formed with the material and film thickness shown in FIG. 3 to produce the reflective member 1 having the layer configuration shown in FIG. This reflecting member 1 was divided into eight in the circumferential direction, and this was designated as Example 1.

<Example 2>
Example 2 corresponds to the reflecting member 1 of the second embodiment. Before forming the reflective layer 12, the light blocking layer 15 was formed with the material and film thickness shown in FIG. 4 to produce the reflective member 1 having the layer structure shown in FIG. Further, an acrylic paint was spray-coated on the reflection increasing layer 14 and baked and dried at 160 ° C. for 30 minutes to form a topcoat layer 16 having a film thickness of 15 μm. Other configurations were the same as those in Example 1.
<Example 3>

  Example 3 corresponds to the reflecting member 1 of the third embodiment. After the reflective layer 12 is formed, the light blocking layer 15 is formed in the material and thickness shown in FIG. 4 and the topcoat layer 16 is formed on the reflective layer 14 in the same manner as in Example 2 to obtain FIG. The reflecting member 1 having the layer configuration shown in FIG. Other configurations were the same as those in Example 1.

<Comparative example>
After forming the reflective layer 12, the top coat layer 16 was formed on the reflection enhancement layer 14 (not shown) without forming the light blocking layer 15 as in Example 2. Other configurations were the same as those in Example 1.

  About these Examples 1-3 and a comparative example, the evaluation test shown below was done.

<Reflectance>
The total light reflectance at a wavelength of 555 nm was measured using a self-recording spectrophotometer.

<Measurement of thickness of reflective layer>
The cross section of the reflecting member 1 was cut, and the film thickness was measured by electron microscope (SEM) observation.

<Heat resistance test>
Each sample was left in a hot-air circulation tank maintained at 120 ° C., and the appearance change after 100 days and 150 days was observed.

<Light resistance test>
A mercury lamp was turned on with an ultraviolet intensity of ² mW / cm ² in a constant temperature bath at 120 ° C., and each sample was left for 100 days and 150 days. Then, the total light reflectance in wavelength 555nm was measured for each sample using the self-recording spectrophotometer. Further, a commercially available tracing paper was placed on the sample, and the appearance change, particularly the color change of the sample was observed.

<Gas barrier resistance test>
Each sample was allowed to stand for 100 hours in a desiccator mixed with 10 ppm of hydrogen sulfide (H ₂ S) gas and maintained at a temperature of 50 ° C. and a humidity of 85%, and then the appearance was observed. Table 1 shows the results of these evaluation tests.

  As shown in Table 1, in Examples 1 to 3, the reflectivity hardly decreased, silver discoloration did not occur, and the effect of the reflecting member 1 in the above embodiment was recognized. On the other hand, in the comparative example, the discoloration of yellow or brown is particularly close to the light source 3 such as the socket portion 1a or the height center portion 1b (see FIG. 1A) and exposed to high-intensity ultraviolet rays. Was recognized.

  The present invention focuses on the fact that a silver thin film has a “window” that transmits ultraviolet light having a wavelength of about 320 nm, and uses a light blocking layer 15 that absorbs ultraviolet light including this wavelength region by light interference. Thus, the discoloration of silver contained in the reflective layer is suppressed, and the configuration of the light blocking layer 15 is not necessarily limited to the description of the above-described embodiment, and various modifications are possible.

  For example, the light blocking layer 15 may be provided after a metal thin film made of titanium, aluminum, or the like is formed on the reflective layer 14. If it carries out like this, the ultraviolet-ray from the light source 3 can be reflected effectively, and the discoloration of silver can be suppressed. Moreover, the film thickness of each layer can also be designed so that the light-blocking layer 15 may have a reflection enhancing effect with respect to light in the visible light region. In this way, while absorbing ultraviolet light, visible light can be reflected efficiently, and light utilization efficiency is improved.

DESCRIPTION OF SYMBOLS 1 Reflective member 11 Base material 12 Undercoat layer 13 Reflective surface 14 Reflective layer 15 Light shielding layer 16 Topcoat layer 2 Lighting fixture

Claims (4)

A substrate, before provided via an undercoat layer formed on the Kimoto material comprises silver, and a reflective layer having a reflective surface for reflecting incident light, the light absorption peak absorbed by interference of light It has a wavelength in the range of wavelengths 250 to 420 nm, between the front Symbol undercoat layer and the reflective layer, or further comprising a a light blocking layer laminated on the reflective surface of the reflective layer reflection Element.   The reflection member according to claim 1, wherein the light blocking layer has an ultraviolet transmittance of about 20% or less near a wavelength of 320 nm.   The reflection member according to claim 1, wherein the light blocking layer is formed as an optical multilayer film.   The lighting fixture using the reflection member as described in any one of Claims 1 thru | or 3.

Images