JPH06275112A - Lighting reflector, lamp, lighting system and luminaire - Google Patents

Abstract

PURPOSE:To clearly define an illuminating pattern. CONSTITUTION:A wide-angle lamp 21 comprises a wide-angle mirror 22 formed integrally with a halogen lamp IL. The outer shape of the wide-angle lamp 21 conforms to MR-16 specification. A reflecting surface portion 26 of predetermined dimensions is formed on the interior side of the wide-angle mirror 22. The reflecting surface portion 26 comprises a number of facets. The respective facets form a smooth, rectangular, planar mirror surface and each reflect the rays of light from the filament F of the halogen lamp IL in a predetermined direction so that the rays of light are emitted from an illuminating opening 24. Brightness at measuring points inside and outside the contour portion of the illuminating pattern meets Li/Lo>=1.2 and the apparent area of the reflecting surface portion 26 meets So/Si<=0.7. If someone looking at the wide-angle lamp 21 near the peripheral portion of the illuminating pattern moves, the number of facets that reflect the rays of light from the filament F and seem to shine varies greatly from one side to the other side of the contour portion of the illuminating pattern, so brightness is varied remarkably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reflector for lighting, a lamp, a lighting device, and a lighting fixture having improved light distribution characteristics of a contour portion.

[0002]

2. Description of the Related Art Conventionally, for example, a mirror-integrated lamp is known. This lamp is, for example, a halogen lamp having a filament of a vertical wire, and a substantially bowl-shaped reflector for illumination provided integrally therewith, and is used for spot lighting in stores.

A large number of facets forming a flat mirror surface are formed on the specular reflection surface portion formed on the inner surface of the illuminating reflecting mirror, and the light rays emitted from the filament of the halogen bulb are formed by these facets. Is reflected in a predetermined direction, and a light beam is emitted from the irradiation opening at a predetermined irradiation angle as a whole to illuminate a predetermined range.

21 to 23 show the light distribution patterns of the conventional wide-angle lamp 1, medium-angle lamp 2, and narrow-angle lamp 3, respectively. In these lamps 1 to 3, the central luminous intensity and the so-called 1/2 beam angle (1/2 illuminance angle) which is a spread angle at which the value becomes equal to 1/2 of the central luminous intensity are emphasized, and each facet is The irradiation pattern P formed on the irradiation surface 4 is arranged so that the light can be concentrated in the center up to the limit that does not cause unevenness in the center.

21 to 23, staircase-shaped polygonal lines 1a to 3a show the overlap of the light rays reflected by the facets, and many light rays are superposed on the center of the irradiation pattern P, and the central luminous intensity is shown. Is shown to be elevated.

[0006] In this state, when moving on the irradiated surface 4 while watching each of the lamps 1 to 3, as the distance from the central portion of the irradiation pattern where the luminous intensity is maximized, the specular reflection surface portion continues in the radial direction. The number of shining facets decreases at an almost constant rate. Therefore, the brightness is gradually reduced toward the periphery of the irradiation pattern.

[0007]

However, in the above-mentioned conventional configuration, the brightness is gradually reduced in the vicinity of the peripheral portion of the irradiation pattern P and the contour portion E (edge) of the irradiation pattern P is blurred, so that the irradiation target P is irradiated. There is a problem that the lighting effect that makes things stand out is small.

The present invention has been made in view of the above points, and an illumination reflecting mirror in which the contour of an irradiation pattern is clear,
An object is to provide a lamp, a lighting device, and a lighting fixture.

[0009]

According to a first aspect of the present invention, there is provided an illumination reflecting mirror, which is a mirror-like reflecting surface portion which is substantially in the form of a rotary body and which optically opposes a light source contained therein and has a center in the irradiation direction as an axis. An illumination reflecting mirror having an irradiation opening for passing a light beam emitted from the light source, wherein the illumination reflecting mirror reflects the light beam emitted from the reflecting mirror from the light source by 1000 mm.
With respect to the irradiation pattern on a plane that is separated from each other and is orthogonal to the axis, an inner measurement point located inside the contour portion of the irradiation pattern and a 10 mm distance from the inner measurement point,
Luminances measured at the outer measurement points located outside the contour portion are Li and Lo, respectively, and apparent areas of the specular reflection surface portion that reflect and shine the light beam emitted from the light source are Si and So, respectively. Then, Li / Lo ≧ 1.2 and So / Si ≦ 0.7.

There is a problem that the contour is not clear outside the above range. Also, the mirror facets are effective in reducing the filament image. However, it is not always essential in terms of contours. Further, the mirror may be made of a glass substrate, a metal, or a heat-resistant resin in some cases,
The reflective surface may be vapor-deposited with metal or a multilayer interference film may be applied.

A lamp according to a second aspect comprises the illumination reflecting mirror according to the first aspect and a lamp portion mounted on the reflecting mirror.

According to a third aspect of the present invention, there is provided a lighting device including a lamp which serves as a light source of the reflecting mirror for lighting according to the first aspect, and the lamp is removable.

According to a fourth aspect of the present invention, there is provided a luminaire including a luminaire main body,
The lighting reflecting mirror according to claim 1 attached to the fixture main body, and a lamp provided opposite to the lighting reflecting mirror.

[0014]

In the illumination reflecting mirror according to claim 1, the specular reflection surface portion irradiates a light beam to a predetermined area on the object to be irradiated to form an irradiation pattern, and the inside and outside of the contour portion of the irradiation pattern are formed. The brightness ratio is 1.2 or more, and the apparent area ratio of the specular reflection surface portion that reflects and shines the light emitted from the light source greatly changes to 30% or more, so that the outline of the irradiation pattern becomes clear and clear. In addition, the brightness ratio is 1.
If it is less than 2 or the apparent area ratio is less than 30%, the outline of the irradiation pattern is not clear,
Lighting effect is reduced.

In addition to the function of the first aspect, the lamp according to the second aspect includes the reflecting mirror for illumination and the lamp portion serving as a light source, so that it is easy to handle and the contour of the irradiation pattern is clear and clear. .

In the illumination device according to the third aspect, in addition to the operation according to the first aspect, since the illumination reflecting mirror and the lamp serving as the light source are detachably provided, the lamp can be exchanged and the irradiation pattern outline can be obtained. Clearly becomes clear.

According to the lighting equipment of the fourth aspect, in addition to the operation of the first aspect, since the reflecting mirror for illumination is attached to the main body of the lighting equipment, the lighting equipment having a clear contour of the irradiation pattern is provided.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of an embodiment of a reflector for illumination, a lamp, a lighting device and a lighting fixture of the present invention will be described below with reference to the drawings.

In FIG. 11, 11 is a lighting fixture, and this lighting fixture 11 constitutes, for example, a spotlight for a store,
The flange 14 attached to the ceiling surface 12 and this flange
It has a circular-cylindrical arm 15 supported by 14, and an instrument body 16 supported by the lower end of this arm 15 so as to be vertically rotatable. A lamp socket (not shown) is provided inside the fixture body 16.

A transformer 17 such as a box-shaped ballast is installed above the ceiling surface 12.
A power line 18 of a commercial AC power supply of 100V is connected to 17, and an output line 19 of 12V is connected to the line 17. The output line 19 passes through the inside of the arm 15 and is connected to a lamp socket inside the apparatus body 16. It is connected.

A wide-angle lamp 21 as a mirror-integrated type (for example, MR-16) is detachably attached to the lamp socket.

This wide-angle lamp 21 has a central luminous intensity of 1/2.
1 is a so-called wide-angle type which irradiates light rays at a wide angle of about 30 ° to 45 °, which is an angle in the direction in which the value becomes equal to , A halogen bulb IL that composes the lamp that serves as the light source
In addition, a wide-angle mirror 22 as a reflecting mirror for illumination is integrally formed.

The halogen bulb IL is a so-called C8 low-voltage bulb having a vertical-connection filament F for high-current lighting at 12 V. Inside the glass bulb B made of quartz glass, an inert gas and A minute amount of the halogen group element is encapsulated and the filament F is encapsulated.

The filament F is wound in a coil shape with the axis O of the wide-angle mirror 22 as a substantially central axis, and a pair of protrusions are formed on the rear surface of the wide-angle lamp 21 in parallel with each other. The base pin T is connected to the base pin T, and the base pin T is attached to the lamp socket of the main body 16 of the instrument so that electric current is supplied to the filament F to emit light.

The wide-angle mirror 22 is a substantially rotating body having an axis O as a rotation axis, has a substantially bowl shape that widens forward (irradiation direction), and has a circular irradiation opening 24 on the front side. Is formed, a flange portion 24a having an annular shape is projected from the peripheral portion of the irradiation opening 24 toward the outside, and a cylindrical portion 25 for fixing the halogen bulb IL from the vicinity of the axis O toward the rear side. Is projected.

Further, on the inner side surface of the wide-angle mirror 22, a specular reflection surface portion 26 that optically opposes the halogen bulb IL.
Are formed.

The mirror-reflecting surface portion 26 is radially divided into 72 at a 5 ° pitch in the circumferential direction with the axis O as the center, and is divided into 12 concentrically in the radial direction with the axis O as the center. A substantially rectangular facet 27 is formed. All of these facets 27 have a smooth flat surface,
The light beams emitted from the filament F of the halogen bulb IL are arranged so as to reflect in a predetermined direction.

In the specular reflection surface portion 26, when the intersection of the plane passing through each corner of each facet 27 and the axis O is a predetermined point An, each front corner of each front facet 27 is defined. The intersection of the passing plane and the axis O is defined as a predetermined point A ₁ , and the intersection of the plane passing through each corner on the rear side of each rear facet 27 and the axis O is defined as a predetermined point A _13. From the front side to the rear side, the intersections of a plane perpendicular to the axis O passing through each corner between the facets 27 and the axis O are set to predetermined points A _{2 to} A _12, and further, each predetermined point A ₁ ˜A ₁₃ and the distance between each corner of each facet 27, that is, the radius dimension of the specular reflection surface portion 26 centered on each predetermined point An is Xn, the axis O and the irradiation opening 24.
Assuming that the distance between the coordinate origin A ₀ set at the intersection point with and the predetermined point An is Yn, the relationship between these Xn and Yn is
With A ₁ , Y ₁ = 0.00 mm, x ₁ = 20.28 mm, A ₂
With Y ₂ = 2.00 mm, x ₂ = 19.55 mm, and A ₃ ,
Y ₃ = 3.94 mm, x ₃ = 18.77 mm, A ₄ and Y ₄
= 5.84 mm, x ₄ = 17.90 mm, A ₅ and Y ₅ =
7.71 mm, x ₅ = 16.96 mm, A ₆ and Y ₆ = 9.
51mm, x ₆ = 15.92mm, with A _7, Y ₇ = 11.2
5 mm, x ₇ = 14.77 mm, A ₈ and Y ₈ = 12.80
mm, x ₈ = 13.60 mm, A ₉ and Y ₉ = 14.25 m
m, x ₉ = 12.27 mm, A ₁₀ and Y ₁₀ = 15.61 m
m, x ₁₀ = 10.73 mm, A ₁₁ and Y ₁₁ = 16.75 m
m, x ₁₁ = 9.20 mm, A ₁₂ and Y ₁₂ = 17.80 mm,
x ₁₂ = 7.45mm, at _{A 13, Y 13 = 18.55mm,} x 13
However, the radius dimension Xn may be set within ± 20%, preferably within 10%, particularly preferably within 5%.

In the wide-angle lamp 21 of this embodiment, the wide-angle mirror 22 has an outer diameter (mirror diameter) L ₁ of about 50 mm.
The dimension (total length) L ₂ from the irradiation opening 24 to the base end portion Ta of the base pin T is set to 37.3 mm, and as a whole, MR-
It is adapted to the 16th shape. Also, the irradiation opening 24
The distance Lc from the center of the filament F to the light center is 1
0.75 mm, the longitudinal dimension Lf of the light emitting portion of the filament F
Is set to 2.5 mm to 3.0 mm. The shorter the longitudinal dimension Lf of the filament F, the easier the light distribution control. Therefore, it is desirable to set it to 2.5 mm to 2.7 mm.

Then, as shown in FIGS. 3 and 4, the light beam emitted from the filament F of the halogen bulb IL is
The light is reflected by each facet 27 in a predetermined direction, and a light beam is emitted from the irradiation opening 24 at an angle θw of about 35 °.
A substantially circular irradiation pattern P is formed on the irradiation surface D having a planar shape.

That is, FIGS. 3 and 4 show the irradiation patterns P1 to P7 of the light rays reflected by the seven facets 27 extracted from each facet 27, and the step-shaped polygonal line Pw indicates the irradiation patterns P1 to P7. Shows the overlapping state of.

As described above, according to the wide-angle lamp 21 in which the wide-angle mirror 22 and the halogen bulb IL of this embodiment are combined, the light beam is emitted in a wide angle range of 30 ° to 45 ° in the 1/2 beam angle range. In addition to being able to irradiate, a large amount of light rays reflected by each facet 27 can be concentrated on the peripheral portion of the irradiation pattern P. Therefore, the irradiation pattern P
In the inside, it is possible to increase the brightness of the peripheral portion where the brightness tends to decrease, and to obtain a beautiful irradiation pattern P that is uniform and has no unevenness in the brightness distribution. To increase the change,
The contour of the irradiation pattern P can be made clear and clearly, and particularly in accent lighting of a store, the object to be irradiated can be made to stand out and the lighting effect can be enhanced.

Next, with reference to FIG. 5 to FIG. 7, the medium square lamp 31 mounted in the lamp socket of the fixture body 16 of the lighting fixture 11 will be described.

The medium-angle type lamp 31 is a so-called medium-angle type (medium-illuminated type) having a 1/2 beam angle range of about 15 ° to 30 °, and as shown in FIGS. 5 and 6, a wide-angle type lamp 31. twenty one
It has an outer shape similar to that of MR-16, and is adapted to MR-16, and a middle-angled mirror 32 as a reflecting mirror for illumination is integrally formed on a similar halogen bulb IL serving as a light source. There is.

The specular reflection surface portion 34 formed on the inner surface side of the middle-angled mirror 32 is radially divided around the axis O at a pitch of 5 ° in 72 divisions.
A large number of substantially rectangular facets 35 are formed by concentrically dividing the shaft center O in the radial direction into 16 parts. All of these facets 35 have a smooth flat shape and are arranged so as to reflect the light rays emitted from the filament F of the halogen bulb IL in a predetermined direction.

In the specular reflection surface portion 34, when the intersection of the plane passing through each corner of each facet 35 and the axis O is a predetermined point An, each front corner of each facet 35 on the front end side is defined. The intersection of the passing plane and the axis O is the predetermined point A ₁ , and the intersection of the plane passing through the rear corners of the rear facets 35 and the axis O is the predetermined point A _17. From the front side to the rear side, the intersections of the plane perpendicular to the axis O passing through each corner between the facets 35 and the axis O are set to predetermined points A _{2 to} A _16, and further, to each predetermined point A ₁ ˜A ₁₇ and the corners of each facet 35, that is, the radial dimension of the specular reflection surface portion 34 centered on each predetermined point An is Xn, the axis O and the irradiation opening 36.
Assuming that the distance between the coordinate origin A ₀ set at the intersection point with and the predetermined point An is Yn, the relationship between these Xn and Yn is
A ₁ , Y ₁ = 0.00 mm, x ₁ = 20.27 mm, A ₂
With Y ₂ = 1.49 mm, x ₂ = 19.60 mm, A ₃ ,
Y ₃ = 2.97 mm, x ₃ = 18.88 mm, A ₄ and Y ₄
= 4.41 mm, x ₄ = 18.14 mm, A ₅ and Y ₅ =
5.82 mm, x ₅ = 17.37 mm, A ₆ and Y ₆ = 7.
21mm, x ₆ = 16.55mm, with A _7, Y ₇ = 8.56
mm, x ₇ = 15.69 mm, A ₈ and Y ₈ = 9.86 mm,
x ₈ = 14.79 mm, A ₉ and Y ₉ = 11.12 mm, x
₉ = 13.84 mm, A ₁₀ , Y ₁₀ = 12.35 mm, x ₁₀
= 12.82 mm, A ₁₁ , Y ₁₁ = 13.50 mm, x ₁₁ =
11.76 mm, A ₁₂ , Y ₁₂ = 14.39 mm, x ₁₂ = 1
0.88 mm, A ₁₃ , Y ₁₃ = 15.22 mm, x ₁₃ = 9.
98 mm, A ₁₄ , Y ₁₄ = 16.00 mm, x ₁₄ = 9.03
mm, A ₁₅ , Y ₁₅ = 16.75 mm, x ₁₅ = 7.94 mm,
A ₁₆ , Y ₁₆ = 17.41 mm, x ₁₆ = 6.80 mm, A ₁₇
Y ₁₇ = 17.95 mm, x ₁₇ = 5.61 mm However, the radius dimension Xn may be set within ± 20%, preferably within 10%, and particularly preferably within 5%. Good.

In the medium-angle lamp 31 of this embodiment, unlike the wide-angle lamp, the filament F is emitted from the irradiation opening 36.
The distance Lc to the center of light is set to 12.000 mm.

Then, as shown in FIG. 7, a halogen bulb
The light beam emitted from the filament F of IL is reflected in a predetermined direction by each facet 35, and the angle θ is about 25 °.
A light beam is emitted from the irradiation opening 36 in the form of m, and a substantially circular irradiation pattern P is formed on the surface D to be irradiated.

That is, FIG. 7 shows the irradiation patterns P1 to P7 of the light rays reflected by the seven facets 35 extracted from each facet 35, and the step-shaped polygonal line Pm indicates the overlapping of the irradiation patterns P1 to P7. It shows the state.

As described above, in the medium-angle lamp 31 in which the medium-angle mirror 32 and the halogen bulb IL are combined in this embodiment, the range of the 1/2 beam angle is a light beam having a medium angle of about 15 ° to 30 °. Can be irradiated, and a large amount of light rays reflected by each facet 35 can be concentrated on the peripheral portion of the irradiation pattern P. Therefore, in the irradiation pattern P, the brightness of the peripheral portion where the brightness tends to decrease can be increased, and a uniform and beautiful irradiation pattern P can be obtained without unevenness of the brightness distribution, and the contour portion E (edge) of the irradiation pattern P can be obtained. ) It is possible to increase the change in luminance in the vicinity to make the contour of the irradiation pattern P clear and clear, and in particular, in accent lighting of a store, the illuminated object can be made to stand out and the lighting effect can be enhanced. .

Next, with reference to FIG. 8 to FIG. 10, the narrow angle type lamp 41 to be mounted on the lamp socket of the fixture body 16 of the lighting fixture 11 will be described.

The lamp 41 is a so-called narrow-angle type (narrow-illumination type) having a 1/2 beam angle range of about 5 ° to 15 °.
As shown in FIG. 8 and FIG. 9, it has an outer shape similar to that of the wide-angle lamp 21 and is adapted to MR-16. The narrow-angle mirror 42 is integrally formed.

The specular reflection surface portion 44 formed on the inner surface side of the narrow-angle mirror 42 is radially divided into 72 at a 5 ° pitch in the circumferential direction about the axis O, and
A large number of substantially rectangular facets 45 are formed by concentrically dividing the shaft center O in the radial direction. These facets 45 are all formed into a smooth flat surface, and are arranged so as to reflect the light rays emitted from the filament F of the halogen bulb IL in a predetermined direction.

In the specular reflection surface portion 44, the intersection of the plane passing through the corner portion of each facet 45 and the axis O is a predetermined point A.
Let n be the predetermined point A _{1 at} the intersection of the plane O passing through the front corners of the front end facets 45 and the axis O, and pass through the rear corners of the rear end facets 45. Plane and axis O
The intersection between the predetermined point A _15, and a plane perpendicular to the axis O through each corner portion between each facet 45, toward the rear side intersection of the axis O from the front side, sequentially, a predetermined point A ₂ and to a _14, further separation dimension between each corner of each facet 45 and the predetermined point a ₁ to a _15, i.e., the radial dimension of the specular reflecting surface portion 44 centered on the predetermined point an and Xn, axis O Assuming that the distance between the coordinate origin A ₀ set at the intersection of the irradiation opening 46 and the predetermined point An is Yn, the relationship between these Xn and Yn is A
₁ , Y ₁ = 0.00 mm, x ₁ = 20.27 mm, A
₂ , Y ₂ = 1.54 mm, x ₂ = 19.53 mm, A
_{At 3} , Y ₃ = 3.06 mm, x ₃ = 18.75 mm, A
_{At 4} , Y ₄ = 4.57mm, x ₄ = 17.93mm, A
₅ , Y ₅ = 6.06 mm, x ₅ = 17.07 mm, A
_{At 6} , Y ₆ = 7.53 mm, x ₆ = 16.17 mm, A
_{At 7} , Y ₇ = 8.96 mm, x ₇ = 15.21 mm, A
_{At 8} , Y ₈ = 10.37 mm, x ₈ = 14.20 mm, A ₉
And Y ₉ = 11.72 mm, x ₉ = 13.14 mm, A
_{At 10} , Y ₁₀ = 13.01 mm, x ₁₀ = 12.01 mm, A ₁₁
And Y ₁₁ = 14.26 mm, x ₁₁ = 10.81 mm, A
_{At 12} , Y ₁₂ = 15.40 mm, x ₁₂ = 9.53 mm, A
_{At 13} , Y ₁₃ = 16.40 mm, x ₁₃ = 8.27 mm, A
_{At 14} , Y ₁₄ = 17.29 mm, x ₁₄ = 6.95 mm, A
_{At 15} , Y ₁₅ = 18.06 mm, x ₁₅ = 5.56 mm
X may be set within ± 20%, preferably within 10%, particularly preferably within 5%.

In the narrow-angle lamp 41 of this embodiment, the distance L from the irradiation opening 46 to the light center of the filament F is L.
The c is set to 13.752 mm, the rear end of the narrow-angle mirror 42 is recessed in a substantially spherical shape, and a valve clearance 47 is formed.

Then, as shown in FIG. 10, the light beam emitted from the filament F of the halogen light bulb IL is reflected in a predetermined direction by each facet 45 and forms a light beam from the irradiation opening 46 at an angle θn of about 13 °. Is irradiated, and a substantially circular irradiation pattern P is formed on the surface D to be irradiated.

That is, FIG. 10 shows the irradiation pattern of the light rays reflected by the plurality of facets 45 extracted from each facet 45, and the staircase-shaped broken line Pn shows the overlapping state of the irradiation patterns P1 to P7. ing.

As described above, in the narrow-angle lamp 41 in which the narrow-angle mirror 42 and the halogen bulb IL of the present embodiment are combined, the light beam can be emitted at a narrow angle of 1/2 beam angle of about 5 ° to 15 °. At the same time, many light rays reflected by each facet 45 can be concentrated on the peripheral portion of the irradiation pattern P. Therefore, in the irradiation pattern P, the brightness of the peripheral portion where the brightness tends to decrease can be increased, and a uniform and beautiful irradiation pattern P can be obtained without unevenness of the brightness distribution, and the contour portion E (edge) of the irradiation pattern P can be obtained. ) It is possible to increase the change in brightness in the vicinity to clearly define the contour of the irradiation pattern P, and particularly in accent lighting of a store or the like, the irradiation target object is made to stand out,
The lighting effect can be enhanced.

Next, Table 1 and FIGS. 12 to 16 show the results of experiments in which the definition of the contour portion E of the irradiation pattern P was compared with that of a conventional lamp using the above-mentioned medium-angle lamp 31.

[0050]

[Table 1] In this experiment, as shown in FIGS. 17 to 18, a medium-angle lamp 31 and three other MR-16 compatible lamps 5 are used.
For 1, 52 and 53, the luminance distribution near the contour portion E of the irradiation pattern P is measured, and the inside measurement points Pi and the outside measurement points set at positions slightly shifted inside and outside the contour portion E of each irradiation pattern. At the point Po, the flashed area S, that is, FIG.
As shown in (b), the mirror of each lamp 31, 51, 52, 53
When looking at 32, 51a, 52a, 53a, each mirror 32, 51a,
The apparent area in which the image of the filament F is shining on 52a and 53a is measured.

The lamp 51 is a wide-angle type of 75 W, the lamp 52 is a medium-angle type of 35 W, the lamp 53 is a wide-angle type of 65 W, and the medium-angle type lamp 31 of the present embodiment is 35 W.

The conditions for measuring the brightness are as follows.

Irradiation distance: 1170 mm Photometric distance: 1000 mm Measurement pitch: 10 mm Viewing angle: 0.2 ° Standard white plate is used. That is, the light rays emitted from each lamp 31, 51, 52, 53 are each lamp 31, 51. , 52, 53 filament F to 11
It has an irradiation distance of 70 mm and is projected on a wall surface 55 that is perpendicular to the axis O, and the photometric distance to the filament F is 1
A standard white plate of 000 mm is used, a luminance meter with a viewing angle of 0.2 ° is used, and 10 is measured in a direction orthogonal to the axis O.
While moving at a mm pitch, the luminance is measured at each of 9 to 11 locations, and the luminance ratio at the adjacent measurement point is calculated.

Table 1 shows the experimental results obtained under the above measurement conditions.

Further, in Table 1, the positions of the contour E sensed by a plurality of observers are marked with *, and the part where the brightness ratio is the largest at the adjacent measurement points is marked with (MAX). ing.

Further, the flashed area S is measured by measuring the apparent area of the image of the filament F taken by photography, and the conditions for this photography are as follows.

Shooting distance: 600 mm Aperture: f / 16 Shutter speed: 1/1000 to 1/60 The experimental results obtained under such measurement conditions are shown in FIGS. 12 to 15. . Further, in each figure, (a) shows a point C moved 5 mm inside the contour E.
(b) shows the result of photographing at the point Co, which is moved to the outside of the contour E by 5 mm. Further, in the central portion of FIGS. 12 to 15 (a) and (b),
The glass bulb B of the halogen bulb IL is shown.

As a result of this experiment, the area reduction rate of the lamp 51 in the vicinity of the contour E is 45%, the area reduction rate of the lamp 52 is 21%, the area reduction rate of the lamp 53 is 27%. The area reduction rate of the rectangular lamp 31 is 42%, and as a whole, in the conventional lamps 51 to 53, as shown in FIG. While the number of shining facets is proportionally reduced, in the medium-angle lamp 31 of the present embodiment, as shown in FIG.
As shown in (b), it was found that the number of facets shining in the radial direction in the vicinity of the contour portion E sharply decreased.

When the results of these experiments are summed up, the position of the contour portion E felt by a plurality of observers and the position where the brightness ratio is maximum are substantially coincident with each other. It was found that the contour E was clearly felt when the area ratio was over 1.2 and the area reduction rate of the flushed area S was 30% or more. In addition, when there is a portion where the luminance ratio is maximum in a portion other than the contour portion E, the irradiation pattern becomes uneven, so that the illumination effect is reduced.

Further, the wide-angle lamp 21 and the narrow-angle lamp
Similar results were obtained in 41 as a result of this experiment.

In the experiment for measuring the flashed area S, the apparent area of the flashed area S was measured by photographing, but the filament F was imaged using the CCD camera, and the image was taken in this manner. It is also possible to measure the apparent area of the flashed area S by further binarizing the object.

Further, the relationship between the luminance ratio and the area reduction rate of the flashed area S, which is the apparent area where the mirror is bright, is as follows: Li / Lo = Ei / Eo = (ρ.LL.Sia.cos γi
) / (Ρ · LL · Soa · cos γo) = Sia / Soa where Li / Lo is the luminance ratio between the inside and outside of the contour portion E Ei / Eo is the illuminance ratio between the inside and outside of the contour portion E ρ: Mirror reflectivity LL: Luminance of lamp (filament) Sia, Soa: Apparent flashed area of the mirror seen from the inside and outside of the contour portion E γi, γo: Logically according to the incident angle inside and outside the contour portion E Can also be calculated.

As described above, each specular reflection surface portion 26,
For 34 and 44, the dimensional error was set within ± 20%, but by setting the dimensional error within ± 10%,
The outline of the irradiation pattern can be made clearer and the illumination effect can be enhanced. Furthermore, by setting the range of this dimensional error to ± 5%, the contour of the irradiation pattern can be made clearer and the illumination effect can be enhanced.

Further, the same effect can be obtained by enlarging or reducing the above-mentioned design size at the same ratio.

Further, in each of the lamps 21, 31, 41, there is a portion where the facets 27, 35, 45 are not formed at the base end portion ILa of the halogen bulb IL.
The area where 45 is not formed should be as small as possible.

In each of the above embodiments, each lamp 21,
A two-pin type cap pin T is provided at the rear end portions of 31, 41, but, for example, as shown in FIG. 19, a so-called Edison cap 61 of screw type is provided at the rear end portions of the lamps 21, 31, 41. It can also be provided integrally, and the irradiation openings 24, 31, 41 of the lamps 21, 31, 41,
A cover glass 62 may be provided on the front surfaces of 36 and 46.

In each of the above embodiments, the halogen bulb is used.
Although the IL and the mirrors 22, 32, 42 are integrally formed,
As shown in 0, the halogen bulb IL and each mirror 22, 32,
It is also possible to form the illuminator by separately forming 42. In the lighting device shown in FIG. 20, a lamp socket portion 64 to which a base pin t protruding from the halogen bulb IL is detachably mounted is attached to the rear side of the mirror 22, and the lamp socket On the rear side of part 64,
A screw-type base portion 65 is provided.

Further, the filament F of the halogen bulb IL
Is formed by winding it into a coil, but a rod-shaped or plate-shaped filament having a longitudinal direction in the height direction can also be used.

In each of the above embodiments, each mirror 2
Although a large number of facets 27, 35, 45 having a planar shape are formed on the specular reflection surface portions 26, 34, 44 of 2, 32, 42, respectively, the arrangement of each facet 27, 35, 45 can be changed appropriately.
Alternatively, instead of the facets 27, 35, 45, a part or all of the specular reflection surface portions 26, 34, 44 can be formed in a curved shape.

Further, although the lighting fixture 11 is formed as a spotlight suspended and supported from the ceiling surface 12, it may be a downlight embedded in the ceiling surface 12. Further, in this lighting fixture 11, a step-down transformer 17 is installed on the upper side of the ceiling surface 12 to convert a commercial AC power source of 100V into 12V. This transformer 17 is a flange 14 attached to the ceiling surface. It can be built in,
In addition, using a halogen bulb for 100V, transformer 17
Can be omitted.

Each of the mirrors 22, 32, 42 can be configured as a dichroic mirror, and a halogen bulb can be used.
An infrared reflection film can be formed on the IL.

[0072]

According to the illumination reflecting mirror of claim 1,
The specular reflection surface part irradiates a predetermined range of light on the object to be irradiated to form an irradiation pattern, and the inside and outside of the contour part of this irradiation pattern reflect the brightness and the light emitted from the light source to shine. Since the apparent area of the specular reflection surface portion largely changes, the contour of the irradiation pattern can be made clear and the illumination effect of making the irradiated object stand out can be increased.

According to the lamp of claim 2, claim 1
In addition to the effects described, since the reflecting mirror for illumination and the lamp portion that serves as a light source are provided, the contour of the irradiation pattern becomes clear and clear, the illumination effect can be enhanced, and the handling can be facilitated.

According to the lighting device of the third aspect, in addition to the effect of the first aspect, since the reflecting mirror for illumination and the lamp serving as the light source are detachably provided, the contour of the irradiation pattern becomes clear and clear. The lighting effect can be improved and the lamp can be replaced.

According to the lighting equipment of the fourth aspect, in addition to the effect of the first aspect, since the reflecting mirror for illumination is attached to the body of the equipment, the lighting equipment having a sharp illumination pattern and a high illumination effect is provided. can do.

[Brief description of drawings]

1 is a cross-sectional view taken along the line I-I of FIG. 2 of a wide-angle lamp showing an embodiment of the present invention.

FIG. 2 is a front view of the above wide-angle lamp.

FIG. 3 is an explanatory diagram showing a light distribution pattern of the wide-angle lamp.

FIG. 4 is an explanatory diagram showing a light distribution pattern of the wide-angle lamp.

FIG. 5 is a diagram showing a medium-angle lamp according to another embodiment of the present invention.
11 is a sectional view taken along line II-II of FIG.

FIG. 6 is a front view of the medium square lamp of the same.

FIG. 7 is an explanatory diagram showing a light distribution pattern of the wide-angle lamp.

8 is a sectional view taken along line III-III of FIG. 9 of a narrow-angle lamp showing still another embodiment of the present invention.

FIG. 9 is a front view of the above narrow-angle lamp.

FIG. 10 is an explanatory diagram showing a light distribution pattern of the same narrow-angle lamp.

FIG. 11 is a perspective view showing an embodiment of the lighting fixture of the present invention.

FIG. 12 is an experimental result of measuring a flashed area of a conventional lamp.

FIG. 13 is the result of the same experiment.

FIG. 14 is a result of the same experiment.

FIG. 15 is an experimental result of measuring a flashed area of the lamp of the present invention. (A) is a conventional lamp (b) is a conventional lamp (c) is a conventional lamp (d) is an example lamp

FIG. 16 shows the experimental results of the above. (A) is a conventional lamp (b) is an example lamp

FIG. 17 is an explanatory view showing the same experimental method as above.

FIG. 18 is an explanatory diagram showing an experimental method of the above. (A) is inside the contour (b) is outside the contour

FIG. 19 is a perspective view showing another embodiment of the lamp of the present invention.

FIG. 20 is an exploded perspective view showing an embodiment of a lighting device of the present invention.

FIG. 21 is an explanatory diagram showing a light distribution pattern of a conventional lamp.

FIG. 22 is an explanatory diagram showing a light distribution pattern of the same.

FIG. 23 is an explanatory diagram showing a light distribution pattern of the same.

[Explanation of symbols]

11 Lighting equipment 16 Main body 21 Wide-angle lamp as a lamp 22 Wide-angle mirror as a reflecting mirror for lighting 24, 36, 46 Irradiation openings 26, 34, 44 Specular reflection surface part 31 Medium-angle lamp as a lamp 32 Reflection for lighting Medium-angle mirror 41 as a mirror Narrow-angle lamp 42 as a lamp 42 Narrow-angle mirror as a reflecting mirror for illumination D Illuminated surface E Contour IL Light source, lamp, and halogen bulb as a lamp Pi Inside measurement point Po Outer measurement point

Claims (4)

[Claims] 1. A mirror-reflecting surface portion, which is substantially in the form of a rotary body and which optically opposes a light source contained therein and has a central axis in the irradiation direction as an axis, and an irradiation opening through which a light beam emitted from the light source passes. In the reflecting mirror for illumination, the reflecting mirror for illumination emits a light beam emitted from the reflecting mirror from the light source.
Regarding an irradiation pattern on a plane that is 0 mm apart and is orthogonal to the axis, an inner measurement point located inside the contour portion of this irradiation pattern and a 10 mm distance from this inner measurement point, and outside the contour portion Let Li and Lo be the luminances measured at the outer measurement points located, respectively, and let Si and So be the apparent areas of the specular reflection surface portion that shines by reflecting the light emitted from the light source, respectively. Li / Lo ≧ 1 1.2 and a reflecting mirror for illumination, characterized in that So / Si ≦ 0.7. 2. A lamp comprising: the reflector for illumination according to claim 1; and a lamp portion mounted on the reflector. 3. A lighting device comprising: a lamp serving as a light source of the illuminating reflecting mirror according to claim 1, wherein the lamp is removable. 4. A lighting fixture comprising: a fixture main body; the illumination reflecting mirror according to claim 1 attached to the fixture main body; and a lamp opposite to the illumination reflecting mirror.