JPH0612906A - Luminaire suitable for art object, and the like - Google Patents

Abstract

PURPOSE:To make illumination suitable for a gallery, a museum, etc., by providing an ultraviolet ray absorbing film at the surface of a reflector base material so as to absorb ultraviolet rays of specified wavelength or less. CONSTITUTION:A reflector, which absorbs ultraviolet ray of 385nm in wavelength by providing an ultraviolet ray absorbing metallic oxide or a sulfide film on the surface of a reflector base material 1, is used. That is, a reflector, which is excellent in color rendering property without causing dispersion in the color phase of a visible light by cutting the ultraviolet ray having adverse influence on the exhibit in an art museum or a museum, is used. The ultraviolet ray absorbing metallic oxide or a sulfide oxide provided on this reflector base material is made by a means of providing a cover layer by applying coating containing a metallic oxide or a sulfide and drying it, or providing a cover layer by performing vacuum deposition by vacuum coating method, or the like. A superfine particle zinc oxide film is desirable as the metallic oxide or the sulfide, and as a light source 3, it is not limited especially, but from the point of color rendering property, as an HID lamp, a metal halide lamp or as an incandescent lamp, a halogen lamp is desirable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is suitable for illuminating works of art such as art museums and museums, or foods and clothing that are deteriorated by ultraviolet rays or infrared rays (hereinafter simply referred to as works of art). In particular, the present invention relates to a lighting device suitable for art lighting and the like that absorbs ultraviolet rays and provides a light source having no hue variation.

[0002]

2. Description of the Related Art Illumination of works of art in museums or illumination of products in display cases in museums is called high color rendering lighting, and it is required to have lighting that naturally shows the color of an object. It is necessary to use no light source and reflector. On the other hand, lighting for art objects and museum displays requires a light source that cuts off ultraviolet rays or infrared rays that affect the deterioration of these objects to be illuminated or a reflector that absorbs these harmful rays.

However, the wavelength band of visible light must be widened in order to eliminate the variation in hue of the reflector, and widening the wavelength band inevitably results in an increase in the amount of ultraviolet rays. For this reason, conventionally, a glass coated with a UV absorbing film is placed on the front surface of the reflector to absorb ultraviolet rays, or a halogen lamp serving as a light source is provided with means such as an ultraviolet ray cutting film. However, placing a glass surface on the front surface of the reflector causes drawbacks such as personal injury due to dropping, equipment weight increase and structural complexity and cost increase.Also, a halogen lamp is used as a light source and a lamp UV cut film is used. When attached, the result that the hue variation in the visible light range occurs.

[0004]

Therefore, the inventor of the present invention
As a result of various studies to obtain a luminaire having a hue balance and ultraviolet rays cut, the present invention has been completed, and an object of the present invention is to provide a luminaire suitable for lighting in museums and museums. It is in.

[0005]

The gist of the present invention is characterized in that a reflector for absorbing ultraviolet rays having a wavelength of 385 nm or less is used by providing an ultraviolet absorbing metal oxide or sulfide film on the surface of the reflector base material. It is a luminaire suitable for lighting art works.
That is, the present invention is a lighting device using a reflector having a good color rendering property that does not cause variations in the hue of visible light by cutting off ultraviolet rays and infrared rays that adversely affect museums and display items in museums.

The present invention will be described in more detail. The reflector according to the present invention has an ultraviolet absorbing film on the surface of its base material, which is illustrated in FIG. Figure 1
In the above, 1 is a substrate, 2 is a coating film, and 3 is a light source.

The reflector substrate used in the present invention is a metal substrate which absorbs infrared rays or a glass substrate which transmits infrared rays, and is in the visible range (380 nm to 780 n).
m) has a total reflectance of 60% or more, and examples thereof include a cold mirror or a dichroic mirror provided with a dielectric multilayer film having different refractive indexes by a vacuum coating method. .

The coating layer of ultraviolet absorbing metal oxide or sulfide provided on the reflector substrate is coated with a coating containing metal oxide or sulfide and dried to form a coating layer, or by a vacuum coating method. , A metal oxide or sulfide is vacuum-deposited to form a coating layer. Examples of metal oxides or sulfides are ZnO ₂ , TiO ₂ , ZnS, CeO ₂
However, an ultrafine zinc oxide coating layer is preferable, and an ultrafine zinc oxide coating layer is preferably used to form the ultrafine zinc oxide coating layer. The thickness of the ultraviolet absorbing film is preferably 3 μm or less, and a film thickness of 3 μm or more is not preferable because the visible light reflectance is lowered and the film is peeled off. The light source used in the present invention is not particularly limited, but a metahalide lamp as an HID lamp or a halogen lamp as an incandescent lamp is preferable from the viewpoint of color rendering.

An example of the method for producing a reflector according to the present invention will be described. As the reflector substrate, a metal or ceramic light-impermeable substrate vacuum coated with an infrared absorbing metal oxide, or a glass substrate is used. Using materials,
A cold mirror obtained by multilayer coating a dielectric film with different refraction that transmits visible light and infrared light on top of it, and using a dispersion of ultrafine zinc oxide in alcohols or esters , Tep Coat,
It is applied by any application means such as spray coating or spinner coating, and is baked at a temperature range of 140 to 500 ° C. for 30 to 120 minutes to form a film. Further, ZnO is formed on the cold mirror by a vacuum coating method.
A metal oxide or sulfide such as ₂ , TcO ₂ , ZnS, and CeO _{2 is} formed by vacuum evaporation. By placing a UV cut filter on the front surface of the lighting apparatus according to the present invention, the effect can be further enhanced.

Next, an example of the performance of the lighting device obtained according to the present invention will be compared with the conventional one. The above measurement conditions are as follows. Light source used: JD100V100W / E National Mini Halogen Mirror shape: φ110 parabolic mirror Measuring distance: 1m Lighting voltage: 100V Further, FIG. 2 shows a transmission curve of the luminaire of the present invention. In the figure, the vertical axis is the transmittance.

[0011]

[Table 1]

That is, the dichroic UV cut mirror having a UV cut coating on the dichroic mirror as the reflecting base material according to the present invention has a reflectance of 16% of ultraviolet rays. %, Which absorbs almost all ultraviolet rays. Next, the present invention will be described more specifically with reference to Examples.

[0013]

【Example】

Example 1 An aluminum material was formed into a paraboloid by drawing, the surface was smoothed by buffing, and a high refractive index of a multilayer coating film titanium oxide (TiO ₂ ) and silicon oxide (S).
The low refractive index of iO ₂ ) was alternately laminated in multiple layers. Further, 3 μm of an ultrafine zinc oxide solution was applied thereon by a spray gun and cured in a hot air heating furnace at 180 ° C. for 10 minutes. As a result, 84% of the ultraviolet light having a wavelength of 380 nm or less was absorbed, and 92% of the infrared light was also absorbed.

Example 2 A heat-resistant resin was coated on the inner surface of an aluminum material that was molded into a parabolic shape by using a glass substrate by drawing, and after curing and smoothing, the surface of the cold mirror was further vacuumed to obtain high purity. Aluminum was vapor-deposited, silicon oxide was vacuum-coated on it, and zinc oxide was vacuum-coated on it by 3μ. As a result, ultraviolet rays of 380 nm or less are 82
% Infrared also absorbed 92%.

[0015]

As described above, the lighting equipment according to the present invention is a reflector that absorbs ultraviolet rays at 385 nm or shorter by providing a coating of an ultraviolet absorbing metal oxide or sulfide on the surface of a reflector base material. By using the above, since the hue balance is good and the ultraviolet rays are cut, there is little influence of deterioration on the object to be illuminated, so that it is possible to provide a luminaire suitable for illuminating works of art. Further, the lighting fixture according to the present invention is also most suitable as a lighting fixture for food, clothing, etc. other than art works.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an illuminator according to the present invention.

FIG. 2 is a transmission curve diagram of the lighting device according to the present invention.

[Explanation of symbols]

 1 substrate 2 coating 3 lamp

Claims (2)

[Claims] 1. A reflector base material provided with a coating film made of an ultraviolet absorbing metal oxide or sulfide on the surface of the reflector base material and using a reflector for absorbing ultraviolet light at 385 nm or less, which is suitable for art lighting and the like. lighting equipment. 2. The luminaire suitable for artistic lighting according to claim 1, wherein the reflector base material absorbs or transmits infrared rays having a wavelength of 780 nm or more and reflects visible light.