JPH02174001A - Lighting device - Google Patents

Abstract

PURPOSE:To prevent the light leakage in an optical path and the glare by it by reflecting the light from a light emitting section on intermediate reflecting mirrors and a radiation reflecting mirror illuminating a radiated reflected face, providing a lens on the light emitting section, and forming the image of a light emitting body on the radiation reflecting mirror. CONSTITUTION:A lens forming the image of a light emitting body on a radiation reflecting mirror 9 is provided on a light emitting section 3 in a lighting device reflecting the light from the light emitting section 3 with the light emitting body on intermediate reflecting mirrors 6 and 8 and a radiation reflecting mirror 9 illuminating a radiated face for radiation. The width of the light in a optical path is made smaller than the size of a formed image, and the unflared optical path can be formed. When the intermediate reflecting mirrors 6 and 8 changing the direction of the radiation light from the light emitting section 3 are provided and the reflected light from the light emitting section 3 is reflected on the radiation reflecting mirror 9, no leakage light from the intermediate reflecting mirrors 6 and 8 and the radiation reflecting mirror 9 is generated, and the radiated face 2 can be satisfactorily illuminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an illumination device that irradiates a surface to be illuminated, such as an office desk, with light from a light emitting section using a reflecting mirror.

(Prior Art) A lighting device that uses a reflecting mirror to illuminate a surface to be irradiated with light from a light emitting section has a structure in which the light emitting section is placed at a position separated from the surface to be irradiated.
It has been increasingly used recently because it allows effective use of the irradiated surface.

For example, lighting devices using reflective mirrors were developed in Japanese Patent Application Laid-open No. 6
As shown in Japanese Patent No. 3-150807, a light emitting section is provided on the upper part of the support, and a mirror is provided to cover the light emitting section so that the direction of the light from the light emitting section can be changed.

(Problems to be Solved by the Invention) In the method disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 150807/1987, the light from the light source of the light emitting part and the reflector is reflected onto the irradiated surface by a mirror, and the irradiated surface is irradiated in a mixed manner. However, since the light from the light emitting part spreads widely, if the distance to the mirror is increased, the light that does not reach the mirror will leak backwards, illuminating unwanted areas or entering the human eye, causing glare. .

In order to prevent this leakage of light, the mirror must be made larger, which inconveniently increases the size of the device.

Therefore, in the lighting device disclosed in JP-A-63-150807, the distance between the light emitting part and the mirror is shortened, but this also shortens the distance between the light emitting part and the irradiated surface. etc. may not be able to be used effectively.

In addition, using a parabolic reflector with a focus on the lamp,
It is conceivable to reflect almost parallel light on a mirror and irradiate the irradiated surface, but the lamp's illuminant (filament) has a length dimension, and the light emitted from the illuminant that is out of focus Light spreads out due to the paraboloid, and there is a risk of light leakage that deviates from the surface of the mirror.In order to prevent light leakage, the mirror must be made larger to match the spread of the light.
The disadvantage of being large is undeniable.

Roughly speaking, even when the lamp is configured with a convex lens system having a focal point, the light emitted at the focal position becomes approximately parallel light, but the light from the light emitting section that is out of focus may spread and cause leakage light.

The present invention has been made in consideration of the above-mentioned circumstances, and even if it is equipped with a long optical path, it can effectively prevent light from leaking out of the reflecting mirror, and the distance between the light emitting part and the irradiated surface can be increased. It is an object of the present invention to provide a lighting device that can effectively utilize a surface to be illuminated.

[Structure of the Invention] (Means for Solving the Problems) The illumination device of the present invention irradiates light by reflecting light from a light emitting section having a light emitter by an intermediate reflecting mirror and an irradiation reflecting mirror that irradiates an irradiated surface. The light emitting device is characterized in that the light emitting section is equipped with a lens that forms an image of the light emitting body on the irradiation reflecting mirror surface.

(Function) Since the illumination device of the present invention forms an image of the light emitting body in the light emitting section on the irradiation and reflection mirror surface, the width of the light in the optical path is smaller than the size of the image, and there is no spread. A light path can be formed. Therefore, even if an intermediate reflector is provided to change the direction of the irradiated light from the light emitting section and the reflected light from the intermediate reflector is reflected onto the irradiation reflector surface, the leakage light from the intermediate reflector and the irradiation reflector is This does not occur, and the surface to be irradiated can be irradiated satisfactorily.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
Figures 3 to 3 show a first embodiment of the present invention. 1 is an office desk, and 2 is the desk surface of this office desk 1, that is, the irradiated surface. 3
1 is a light emitting section having a light emitting body 4, and the light emitting section 3 is disposed on two sides of the irradiated surface 2. In this embodiment, a light projecting section 5 is disposed on the back side of the office desk 1 with the light emitting section 5 facing sideways. Reference numeral 6 denotes a first intermediate reflecting mirror, which reflects the irradiated light from the light emitting unit 3 and changes its direction, and in this embodiment, it is arranged on the back side of the office desk 1. The light emitting unit 3 is disposed on the back side of the desk 1 to face the light emitting unit 3 so that the light emitted from the light emitting unit 3 is reflected in a direction substantially perpendicular to the desk top surface of the office desk 1.

In this case, a through hole 7 is formed in the board surface of the office desk 1 through which the reflected light from the first intermediate reflecting mirror 6 passes.

Reference numeral 8 denotes a second intermediate reflecting mirror, and this second intermediate reflecting mirror 8 further changes the direction of the reflected light reflected by the first intermediate reflecting mirror. It is spaced apart from the office desk 1 so that the light is reflected in the direction where the worker A is located.

Reference numeral 9 denotes an irradiation reflecting mirror, and this irradiation reflecting mirror 9 is provided at a distance from the office desk 1 so as to irradiate the irradiated surface 2 with the reflected light from the second intermediate reflecting mirror 8.

And the first. In this embodiment, the second intermediate reflecting mirrors 6 and 7 and the irradiation reflecting mirror 8 are attached to an arm support 10 attached to the side surface of the desk 1 so that they can rotate in a vertical plane and in a horizontal plane. The light beams are provided on each of the support arms 11 so as to be able to reflect the light in a desired direction.

The light emitting section 3 can be formed to include a lamp 12 having a light emitter (filament) 4 and a reflector (not shown) that reflects light from the lamp 12 to the light projecting section 5.

The light emitting unit 3 is provided with a lens 13 that forms an image B of the light emitting body 4 of the lamp 12 on the surface of the irradiation reflecting mirror 9.

One or more lenses 13 are disposed between the lamp 12 and the first intermediate reflecting mirror 6 in this embodiment, which is located closest to the lamp 12.

Then, the focal point of the lens 13 can be set to f (or f, f'' if there is a front focal point or a rear focal point), the distance from the light emitter 4 to the lens 13 can be set to a, and the position from the lens 13 to the irradiation reflector 9 can be set. It is also desirable that the lens 13 be configured to be adjustable in position in the front-rear direction, and it is desirable to provide a substantially spherical reflector centered on the light emitter 4 behind the lamp 12.

Next, the operation of this embodiment will be explained. Although one of the intermediate reflecting mirrors is omitted in FIG. 3, the effect is the same whether there is one intermediate reflecting mirror or two intermediate reflecting mirrors. By lighting the lamp 12 of the light emitting section 3, light from the light emitter 4 is emitted from the light projecting section 5, reflected by the first intermediate reflecting mirror 6, and reflected by the first intermediate reflecting mirror 6. The direction of the reflected light is changed and directed towards the second intermediate reflecting mirror 8. The direction of the light incident on the second intermediate reflecting mirror 8 is roughly changed and then incident on the irradiation reflecting mirror 9. The reflected light illuminates the irradiated surface 2.

Since the image of the light emitter 4 of the light emitting section 3 is formed on the surface of the irradiation reflecting mirror 9 by the lens 13, the light emitting section 3-
1st. The width of the light in the optical path between the second intermediate reflector 8, 9 and the irradiation reflector 9 is smaller than the size of the image, and an unexpanded optical path is formed, so that the irradiation surface 2 is widened by the irradiation reflector 9. Can be irradiated over a wide range.

Therefore, the first. If the outer diameter dimensions of the reflecting surfaces of the second intermediate reflecting mirrors 8 and 9 and the irradiation reflecting mirror 9 are made to be equal to or slightly larger than the size of the image of the light emitter 4, light leakage will occur at the reflecting mirror portion. There is no risk and the reflecting mirror can be made smaller.

FIG. 4 shows a second embodiment of the invention. The same parts as in the embodiment 1 in the figure are given the same reference numerals, and the explanation thereof will be omitted.

In this second embodiment, one intermediate reflecting mirror 20 is provided, and this intermediate reflecting mirror 20 is provided on the desk surface so that the emitted light from the light projecting section 3 is reflected onto the irradiation reflecting mirror 9. It is.

In this second embodiment, only one intermediate reflecting mirror 20 is required, the number of parts is reduced, and the structure is simple.

Although the present invention has been described in detail with respect to the above two embodiments, the present invention allows various other embodiments.

For example, the lens 13 may be composed of a plurality of lenses, or may be provided separately from the light emitting section 3. However, lens 13
If a plurality of intermediate reflecting mirrors are provided, it is necessary to arrange the intermediate reflecting mirror between the light emitter 4 and the intermediate reflector closest to the light emitter 4. Further, the light emitting section 3 may be provided on the desk top surface.

[Effects of the Invention] As described in detail above, the present invention provides an apparatus in which light from a light emitting section having a light emitter is reflected and irradiated by an intermediate reflecting mirror and an irradiation reflecting mirror that irradiates the irradiated surface. The light-emitting part is equipped with a lens that forms an image of the light-emitting body on the irradiation-reflecting mirror surface, creating an optical path without spreading, and each reflecting mirror is formed with an outer diameter that is approximately the same or slightly larger than the image-forming size. However, light leakage in the optical path and the resulting glare can be prevented.

Therefore, the distance between the light emitting section and the irradiation reflecting mirror can be increased to effectively utilize the irradiated surface, and the reflecting mirror can be made smaller, allowing the apparatus to be made more compact.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention, FIG. 1 is a perspective view, FIG. 2 is a side sectional view, and FIG. 3 is a 1st embodiment of the intermediate reflecting mirror.
FIG. 4 is a side sectional view of a second embodiment of the present invention. 3... Light emitting part, 4... Light emitter, 2... Irradiated surface. 6.8.20...Intermediate reflecting mirror, 9...Irradiation reflecting mirror. 13...Lens.

Claims (1)

[Claims] (1) A light-emitting part that has a light-emitting body and is provided on the irradiated surface side; An intermediate reflecting mirror that reflects the irradiated light from this light-emitting part and changes its direction; An illumination device comprising: an irradiation reflector that irradiates an irradiated surface; and the light emitting section includes a lens that forms an image of the light emitter on the surface of the irradiation reflector.