JPH11178839A - Medical treatment lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a medical treatment lighting system using a halogen lamp as its light source and capable of providing white illuminating light having a high color rendering property. SOLUTION: In a medical treatment lighting system which uses a halogen lamp 2 as its light source, a transparent filter substrate or the bulb 2a of the halogen lamp 2 is covered with a color temperature compensating film. Light impinging on the color temperature compensating film from the halogen lamp 2 is made to go out after its color temperature is elevated by the compensating film, whereby white illuminating light having a high color rendering property can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical lighting device using a halogen bulb as a light source.

[0002]

2. Description of the Related Art In a medical lighting device, it is desirable that the affected part and the operator are not heated by the illumination light, and that the color of the affected part and the like is seen more accurately. Therefore, it is desirable to be able to obtain white light illumination light having a color temperature of 4000 K or more on average and high color rendering with cold light containing no heat rays.

In general, in a conventional medical lighting apparatus using a halogen bulb as a light source, a cold mirror that reflects visible light and transmits heat rays is disposed on the back side of the halogen bulb, while a heat ray absorbing glass is used as a halogen bulb. In addition, the heat ray is removed and the color temperature is increased by arranging the color temperature in front.

[0004]

For this reason, the conventional medical lighting apparatus using a halogen bulb as a light source has the following problems.

(A) Although the color temperature can be raised, the illumination light becomes pale and the color rendering is deteriorated. (B) The heat ray absorbing glass is heavy and expensive.
The heat absorbing glass becomes hot and the surgeon feels uncomfortable with the heat.

SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional situation, and an object of the present invention is to provide a white light illumination light having a high color rendering property by using a halogen bulb as a light source. An object of the present invention is to provide a medical lighting device.

Another object of the present invention is to provide a medical lighting device having an optical filter which is lightweight, inexpensive, and does not become high in temperature by absorbing heat, instead of heat ray absorbing glass. .

[0008] Still other objects of the present invention will become apparent from the following description.

[0009]

One aspect of the medical lighting apparatus according to the present invention is a medical lighting apparatus that uses a halogen bulb as a light source and emits light emitted from the halogen bulb to the outside through a filter. A transparent filter substrate, and a color temperature correction film coated on the filter substrate and configured to increase the color temperature and emit the light incident from the halogen bulb side.

Another aspect of the medical lighting apparatus according to the present invention is a medical lighting apparatus using a halogen bulb as a light source. The light incident on the bulb of the halogen bulb from the halogen bulb side is raised in color temperature. To cover the color temperature correction film to be ejected.

In the medical lighting device of the present invention, the color temperature is raised by the color temperature correction film coated on the filter substrate or the bulb of the halogen lamp, whereby white light illumination light having high color rendering properties can be obtained. .

When a filter coated with a color temperature correction film is used as a filter substrate, a cold filter film (a film that transmits visible light and reflects heat rays) is formed on a filter substrate made of glass or the like that is not heat ray absorbing glass. To perform not only the color temperature correction but also the heat ray reflection function, so that the heat ray absorbing glass can be eliminated. In this case, the filter can be made of inexpensive general thin glass or the like as a filter substrate, and thus can be manufactured at a lower cost than heat ray absorbing glass. In this case, since the filter reflects heat rays, the filter does not absorb heat like a heat ray absorbing glass and does not become high in temperature. (However, in the present invention, a heat ray absorbing glass can be used as the filter substrate).

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on embodiments.

[0014]

1 and 2 show a first embodiment of the present invention. This embodiment is an example in which a plurality of light sources (halogen bulbs) are provided in one lamp body 1 and applied to a multi-lamp medical lighting apparatus. FIG. 1 shows only one of the halogen bulbs 2 and its vicinity. (However, the present invention is also applicable to a single-lamp-type medical lighting device in which only one light source is provided for one lamp body).

On the lamp body 1, a reflecting mirror 3 made of hard glass or translucent heat-resistant plastic is rotatably supported within a predetermined range. The reflecting mirror 3 forms a paraboloid of revolution, and the inner surface of the reflecting mirror 3 is coated with a cold mirror film 4 that reflects visible light and transmits heat rays. A socket 11 is attached to the center of the reflecting mirror 3, and the halogen bulb 2 is detachably attached to the socket 11. The tip of the halogen bulb 2 is covered with a cap for reducing light that enters the filter 5 described below without passing through the cold mirror film 4.

A disc-shaped filter 5 is attached to the lamp body 1 so as to be located in front of the reflecting mirror 3 and the halogen bulb 2. FIG. 2 shows this filter 5
The filter 5 includes a disk-shaped filter substrate 6 made of a glass plate that is not a heat ray absorbing glass, a first cold filter film 7 coated on the filter substrate 6, and a second filter substrate 6. It comprises a cold filter film 8 and a color temperature correction film 9.

The first cold filter membrane 7 is made of A
1, Pt, Au, Ag, Cu, Cr, Ni, Ge, Ti
O ₂ , Ta ₂ O ₅ , ZrO ₂ , ZnS, MgF ₂ , In
₂ O ₃ , Cr ₂ O ₃ , Al ₂ O ₃ , HF 0 ₂ , SiO, SiO ₂
An optical multilayer film formed by vacuum-depositing one or more substances appropriately selected from metals, metal compounds, dielectrics, and the like on the surface (inner surface) of the filter substrate 6 on the side of the halogen lamp 2. It is designed to transmit visible light and reflect heat rays.

The second cold filter film 8 is provided on the surface (outer surface) of the filter substrate 6 on the side opposite to the halogen bulb 2.
It is composed of an ITO film composed of a thin film containing In ₂ O ₃ —SnO ₂ as a main component, which is vacuum-deposited, and also transmits visible light and reflects heat rays.

Here, the first cold filter film 7 and the second cold filter film 8 have different spectral characteristics, and a desired spectral characteristic can be obtained by combining the two. . In other words, the first cold filter film 7 reflects the heat rays (infrared rays) having a relatively short wavelength (800 to 1000 nm) well, but transmits the rays having a relatively long wavelength to improve the spectral characteristics. Have. On the other hand, the second cold filter film 8 has a relatively long wavelength (1000 to 1) among the heat rays that has passed through the first cold filter film 7.
(200 nm).

The color temperature correction film 9 is made of Al, Ge, Ti
O ₂ , Ta ₂ O ₅ , ZrO ₂ , ZnS, MgF ₂ , In
1 appropriately selected from metals, metal compounds, dielectrics, etc., such as ₂ O ₃ , Al ₂ O ₃ , HF 0 ₂ , SiO, SiO _2, etc.
One or more substances on the surface of the cold filter membrane
It has a function of correcting the color temperature of incident light by vacuum deposition on layers or multilayers.

A protective cover 10 made of plastic is attached to the lamp body 1 so as to be located immediately in front of the filter 5, and an inner surface of the protective cover 10 (a surface on the side of the halogen bulb 2) is provided. , A large number of irregularities (not shown) for diffusing light.

Note that, for convenience of drawing, the thickness ratio of the filter substrate 6, the first and second cold filter films 7, 8 and the color temperature correction film 9 in FIG. 2 does not always correspond to the actual ratio. Absent.

In this medical lighting device, as shown by the dotted arrow, light emitted from the halogen bulb 2 is incident on the cold mirror film 4 on the inner surface of the reflecting mirror 3, and the visible light is reflected. On the other hand, the heat rays are transmitted outside the reflecting mirror 3. Also, light reflected by the cold mirror film 4 and then incident on the filter 5 (this light still contains heat rays that could not be removed by the cold mirror film 4).
Of the light directly incident on the filter 5 from the halogen bulb 2, those having a relatively short wavelength are reflected by the first cold filter film 7 toward the reflecting mirror 3, and most of them are reflected through the cold mirror film 4. 3 Transmit outside.

Further, the heat ray having a relatively long wavelength transmitted through the first cold filter film 7 is reflected by the second cold filter film 8 toward the reflecting mirror 3, and most of the heat rays are reflected through the cold mirror film 4. It passes through the mirror 3.

On the other hand, the visible light transmitted through the first and second cold filter films 7 and 8 is raised in color temperature by the color temperature correction film 9 to be converted into white light having high color rendering properties, and the protective cover 10 To illuminate the illumination target.

In this embodiment, not only the color temperature of light is corrected by the color temperature correction film 9 but also the color temperature of light can be corrected by the cold mirror film 4 and the cold filter film. By the combination of these color temperature corrections, the color temperature can be corrected extremely well as a whole, and white light having a high color rendering property at a color temperature of 4000 K or more can be obtained.

The color temperature correction film 9 is provided on the filter substrate 6.
In addition, by coating the cold filter films 7 and 8 together, the filter 5 can perform not only the color temperature correction but also the heat ray reflecting action, so that the heat ray absorbing glass can be eliminated. Also, the filter substrate 6
Because you can use cheap general thin glass etc.
The filter 5 can be manufactured at a lower cost than the heat ray absorbing glass.

Further, since the filter 5 reflects heat rays, it does not absorb heat as in the case of heat ray absorbing glass and does not become high in temperature.

FIGS. 3 and 4 show a second embodiment of the present invention. In this embodiment, as shown in FIG. 3, a color temperature correction film 13 similar to the color temperature correction film 13 in the first embodiment is coated on the outer surface of the bulb 2a of the halogen lamp 2 by vacuum deposition. (Note that the ratio of the thickness of the bulb 2a of the halogen bulb 2 and the thickness of the cold filter film in FIG. 4 does not always correspond to the actual ratio for the sake of drawing). As shown in FIG. 4, the filter substrate 6 of the filter 5 is coated with only the first and second cold filter films 7 and 8, and the color temperature correction film 13 in the first embodiment is different from the first embodiment. Not coated. Other configurations are the same as those of the first embodiment.

In this embodiment, the color temperature of the light emitted from the halogen bulb 2 is corrected by the color temperature correction film 13 coated on the bulb 2a of the bulb 2. The removal of heat rays is performed by the cold mirror film 4 and the first and second cold filter films 7 and 8 as in the case of the first embodiment.

In the present embodiment, not only the color temperature of light is corrected by the color temperature correction film 13 but also the color temperature can be increased by the cold mirror film 4 and the cold filter films 7 and 8. By the combination of these color temperature corrections, the color temperature can be corrected very satisfactorily as a whole, and white light having a high color rendering property at a color temperature of 4000 K or more can be obtained.

[0032]

As described above, according to the present invention, (a) illumination light of white light having high color rendering properties can be obtained, and (b) a filter substrate of a filter is coated with a cold filter film together with a color temperature correction film. By performing not only the color temperature correction but also the heat ray reflection function, it is lightweight, inexpensive,
In addition, a filter that does not become high in temperature by absorbing heat can be provided, and excellent effects such as eliminating the need for heat ray absorbing glass can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of a medical lighting device according to the present invention.

FIG. 2 is an enlarged sectional view showing a filter according to the first embodiment.

FIG. 3 is an enlarged sectional view showing a bulb of a halogen lamp in a second embodiment of the medical lighting device according to the present invention.

FIG. 4 is an enlarged sectional view showing a filter in the second embodiment.

[Explanation of symbols]

 2 Halogen bulb 2a Halogen bulb 5 Filter 6 Filter substrate 7 First cold filter film 8 Second cold filter film 9, 13 Color temperature correction film

Claims (6)

[Claims] 1. A medical lighting device that uses a halogen bulb as a light source and emits light emitted from the halogen bulb to the outside through a filter, wherein the filter includes a transparent filter substrate and the filter substrate, A medical lighting device comprising: a color temperature correction film that raises a color temperature and emits light incident from a halogen bulb side. 2. The medical lighting device according to claim 1, wherein the filter substrate is also coated with a cold filter film that transmits visible light and reflects heat rays. 3. A first cold filter film on a surface of the filter substrate on the side of the halogen bulb, and a second cold filter film on a surface of the filter substrate on the side opposite to the halogen lamp, the spectral characteristics being different from those of the first cold filter film. The medical lighting device according to claim 2, wherein the color temperature correction film is coated on a surface of each of the second cold filter film and the second cold filter film. 4. The first cold filter film comprises an optical multilayer film, and the second cold filter film comprises
4. The medical lighting device according to claim 3, comprising a TO film. 5. A medical lighting apparatus using a halogen bulb as a light source, wherein the bulb of the halogen bulb is coated with a color temperature correction film that raises a color temperature and emits light incident from the halogen bulb side. Medical lighting equipment. 6. The color temperature correction film according to claim 1, wherein a metal, a metal compound, and / or a dielectric is vacuum-deposited.
6. The medical lighting device according to 2, 3, 4 or 5.