JPH028337Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an improvement of a lighting lens that is attached to a lighting device and used.

<Conventional technology and its problems> In spotlights and other lighting equipment,
When projecting straight line light with a rectangular outline onto the walls or ceiling of a room, conventional methods use a separate baffle plate to cut out the excess light that is transmitted from the light source lamp and diffused through the lens. hand,
It is customary to form the outline of a rectangle.

In this case, the amount of light will decrease by the amount of the cut.
There is a problem in that the light becomes dark when projected onto walls, ceilings, etc., making it impossible to obtain a vivid illumination effect with strong light.

<Means for solving the problems> The present invention aims to provide a special illumination lens that helps solve the above problems.
Due to its structure, the contour ridge line of the lens, which is circular when viewed from the front, is exposed as a biconvex lens when viewed from the plane and bottom, and as a biconcave lens when viewed from both sides, and It is characterized by having a rectangular cross-sectional shape when cut on the optical axis.

<Example> Hereinafter, the configuration of the present invention will be specifically explained based on the illustrated example.
As is clear from Figure 5, the glass or other transparent medium has a circular shape when viewed from the front. Reference numeral 10 denotes the circular contour ridge line, which appears in the form of a biconvex lens with a constant thickness t when the lens A is viewed from the plane and from the bottom. In other words, when the lens A is cut along the horizontal diameter line XX in FIG. 1, the cross-sectional shape is a biconvex lens as shown in FIG. 4.

Similarly, when lens A is viewed from both left and right sides of a plane orthogonal to the bottom surface, the above contour ridge line 10
is expressed in the form of a biconcave lens. However, the first
Vertical diameter line in the figure (optical axis of the above biconvex lens form)
As shown in FIG. 5, the cross-sectional shape when cut along Y-Y is determined to be a rectangle with the above-mentioned constant thickness t as the short side.

The lens A of the present invention, which has been specialized in this way, is fitted and set in a spot light B as shown in FIGS. It will be used for lighting. 11 is the main body of the spotlight B, 12 is a lamp cover that is pivotally connected to the inside of the hemispherical shape so as to be able to rotate around the horizontal axis O-O, and a light source lamp 13 is fixedly installed on this. . 14 is a hollow cylindrical lens holder connected and integrated with the lamp cover 12, to which the lens A is applied via a rubber ring 15;
Moreover, it is fixed by a holder cap 16 which is screwed into the holder 14. 17 is a color filter, 18 is a flange for attaching the device main body 11 to a ceiling or wall surface, and 19 is a suspension arm.

<Effects of the Invention> In summary, in the illumination lens A of the present invention, the outline ridge line 10 of the lens A, which is circular when viewed from the front, is shaped as a biconvex lens when viewed from the plane/bottom side, and when viewed from both sides. In addition, the cross-sectional shape of the biconvex lens shape when cut along the optical axis Y-Y is set to be rectangular, so from the action explanatory diagrams in FIGS. 8 and 9, As shown, when the light from the light source lamp 13 passes through the lens A and is projected onto the wall, ceiling, or other light projection surface in the room, the lens A
As a result, a bright and vivid projected image 20 with a rectangular outline is extracted on the light projection surface by the intense light beam.

In other words, there is no need to cut out the excess diffused light as in the prior art mentioned at the beginning, so there is no need to reduce the amount of light, and an extremely clear straight line illumination effect can be obtained. or,
Since there is no need for a separate baffle plate for cutting, Spotlight B and other lighting equipment as a whole can be significantly and rationally simplified, and the assembly work can be carried out with high efficiency, which is considered to be of great practical benefit. I can say it.

[Brief explanation of drawings]

Fig. 1 is a front view of the lens according to the present invention;
Figure 3 is the same plan view and side view, Figures 4 and 5 are the 1st
Each cross-sectional view along the X-X line and the Y-Y line in the figure, No. 6,
FIG. 7 is a front view and a partially cutaway side view showing the state in which the lens is attached to a lighting fixture, and FIGS. 8 and 9 are a plan view and a side view for explaining the light projecting action of the lens. A...Lens for illumination, X-X...Horizontal diameter line, Y-Y...Vertical diameter line (optical axis), 10...
Contour ridge line, 13... Light source lamp, 20... Projection view.

Claims (1)

[Scope of utility model registration request] Outline ridge line 1 of lens A, which is circular when viewed from the front
0 is expressed as a biconvex lens when viewed from the plane/bottom surface, and as a biconcave lens when viewed from both sides, and a cross section taken along the optical axis Y-Y of the biconvex lens configuration. A lighting lens with a rectangular shape.