JPS6214101A - Diffusion lens for pilot lamp - Google Patents

Abstract

PURPOSE:To improve the functions and reliability of a pilot lamp by forming one or more reflection mirror surface layers having a shape successively expanded upwards in the titled lens. CONSTITUTION:Each reflection mirror surface layer 4 has the shape successively expanded upwards and light made incident vertically from a lower end surface A is reflected in its inside or repeatedly reflected and projected from an upper end surface B as the light converted at its optical path into the horizontal direction. At the time of passage through the upper end surface B, the optical path is refracted to the horizontal direction in accordance with the refractive index of a transparent glass-like substance. Thereby, the curve of the optical path is changed in accordance with the size of the curvature of the expanded opening of each reflecting mirror surface layer 4 and the degree of expanded opening of radiated light is determined on the basis of the width of the diameter direction of each part of the lower end surface A due to the wavelength of the light and the shape of the upper end surface B.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a diffusion lens applied to an indicator Ki (hereinafter simply referred to as an indicator light) installed on an airport runway or taxiway or on a general road. .

2. Description of the Related Art Indicator lights, which are installed on the surface of a track or road and provide instructions and warnings to operators and drivers, are either erected on the road surface or embedded in the road surface. Upright display lights are mainly used at airports and have a structure that emits light all around. On the other hand, indicator lights embedded in the road surface mainly use a reflector as an optical system that horizontally deflects light from a light source, and a cover is provided on the top of the reflector for protection.

Problems that the invention aims to solve Conventional indicator lights have the function of being easily visible from all over the sky if they are installed upright, but they are destroyed when an airplane, etc. lands. The danger is extremely high;
Its maintenance is difficult. In addition, due to the characteristics of the optical system of buried type indicator lights, the part that protrudes from the road surface has a considerable height, which not only becomes an obstacle to the running of the vehicle, but also causes a shock to the indicator light itself. This increases the chances of failure and damage, and since the structure has a cover, it cannot be seen from above, and it is possible to emit light in the necessary direction, and it is difficult to see from the road surface. What is needed is an optical system that can reduce the height of the protruding portion as much as possible.

20 Means for Solving Problems The present invention is a rotating body whose rotation axis is a straight line passing through the center of a circular lower end face and perpendicular to the end face, and having a shape that gradually expands toward the upper part. At least one mirror layer inside
This is a diffuser lens for an indicator light made of a transparent glass-like substance formed of two parts, in which light incident from the lower part and part part is reflected internally according to the shape of each lens part separated by a reflective mirror layer. While repeating this, relatively strong light can be emitted from a portion of the end face in the required direction.

E 1 Effect The present invention is based on the invention that cylindrical and columnar transparent glass-like substances having a specific shape are used as anti-resistance agents. ) This is a diffuser lens for indicator lights that has an integrated structure via a mirror layer, and the light that enters from the lower end face of each part is reflected on the anti-tJ1 mirror layer surface or repeats reflection while passing through the inside of the glass-like material. The direction of the light is regulated according to a specific shape, and the light is emitted from the t-end. In other words, it is possible to obtain a diffuser lens for a display light that is capable of emitting relatively strong light in a required direction depending on the shape of each part. At the same time, since a transparent glass-like material (such as reinforced glass or reinforced plastic) having high hardness is integrally molded, the impact resistance of the indicator light itself is improved.

Embodiment FIG. 1 is a cross-sectional side view of an embodiment of the diffusing lens of the present invention taken through the axis of rotation, and 1.2 is a cylinder having a rotating body shape that gradually expands toward the top. shaped lens part,
Reference numeral 3 designates a columnar lens portion having an outer surface that matches the inner surface of the lens portion 2 and whose diameter increases toward the top. Each part is made of the same reinforced plastic. The inner surface of the lens portion 1, both side surfaces of the lens portion 2, and the side surfaces of the lens portion 3 are plated with gold a of aluminum. The lens portions 1.2.3 are fitted together and integrated by appropriate adhesive means to form the diffuser lens L of the present invention, whose lower end surface A is perpendicular to the axis of the rotating body and It is said to be the same. The shape of the lower end surface B of the diffuser lens and each lens part is determined individually depending on the use of the diffuser lens, and depends on the refractive index of the transparent glass-like material used and the required light intensity (rfl f').
? +i is also determined empirically depending on the light source used.

The metal plating layer in F is used as a reflector (fi) in the diffuser lens L.
The light reflected by the reflective mirror layer 4.4 travels through the interior of each portion by total reflection. Anti-1) = Jm side! T! J4.4 has a shape that gradually expands toward the top, so the light that vertically enters from the bottom end face A is reflected internally or is reflected repeatedly, and the optical path is converted to the horizontal direction. It is something that leaves B. Furthermore, when passing through the lower end face B, the optical path is further refracted in the horizontal direction according to the refractive index of the transparent glass-like substance. The bending of the optical path changes depending on the magnitude of the curvature of the expansion of the reflective mirror layer 4.4, and the light is emitted from the shape of the middle and upper end surfaces B in the diametrical direction of each portion of the lower end surface A with respect to the wavelength of the light. The degree of light diffusion is determined.

A metal plating layer 5 is also provided on the outer surface of the lens portion 1, and is provided to prevent light from dissipating from this surface and to minimize loss of light incident from the lower end surface A.

Note that the metal plating described above is applied by a conventional method such as chemical plating or vacuum deposition.

In this example, the diffusion lens [is made by directly integrating the metal plated surfaces with each other, but the anti-fJ1
It can also be produced by fixing a reflective metal slope formed into the same shape as the mirror layer 4.4 and the side metal vapor deposition surface 5, and pouring a molten transparent glass-like substance into the inside.

In addition, instead of directly gluing each part that was molded separately,
They can also be integrated by interposing a thin hard rubber between them.
In this case, the hard rubber is loose! Regarding the shape of the lower end surface B, which can move as an i material and protect the diffuser lens from impact, it must be shaped so that the diffuser lens is less likely to receive rain ν, and of course be able to emit light in the necessary direction. However, the gist of the present invention is that by providing a reflective mirror layer inside the diffuser lens that gradually expands upward, sufficient light intensity in the horizontal direction can be obtained while keeping the protruding part of the indicator light low. Therefore, the object of the present invention can be achieved as long as the protruding portion as a whole has a flat shape that is less susceptible to impact, rather than having a shape W in which the cross section is stepped at the boundary of the lens portion as in the embodiment. For example, the entire upper end surface can be made to form a spherical convex surface.

In this embodiment, two reflective mirror layers are provided, but the number can be increased or decreased as necessary.It is necessary to provide at least one reflective layer, but for example, by increasing the number, the horizontal You can increase the strength of the circle in the direction. Furthermore, most of the light incident from the lens portion 3 and a portion of the light incident from the other lens portions 1 and 2 are directly radiated upward from the upper end face B without being reflected internally, but the light that is centered upward is When it is unnecessary and you want to keep it low, for example, as shown in the cross-sectional view of another embodiment in FIG. ) 1 mirror surface 114' can also be shaped like a morning glory with its lower end closed.

FIG. 3 is a cross-sectional view of the essential parts of the diffusion lens L of the present invention installed as an indicator light, and the housing is made of gold and has a mirrored upper surface with a cushioning material K interposed therebetween. Rini Diffusion Shin 1
This figure shows a state in which the diffuser lens L is held so that the edge of its first circumference and the top surface of the casing are aligned with each other, and is embedded so that the top surface of the casing is intertwined with the road surface. A
yf and 'fQS are provided which require parallel rays perpendicular to the entire surface. The mirror surface on the upper surface of the casing is provided to reflect the light directed downward from the horizontal direction emitted from the upper end surface 8 of the diffuser lens and convert it into an effective component as an indicator light.

(1) Effects of the Invention As described above, the lens of the present invention is embedded in the road surface and can easily convert the light from the light source efficiently from the vertical direction to the horizontal direction, which has been difficult to do in the past. Furthermore, the diffuser lens according to the present invention has a transparent glass-like substance integrated therein, and therefore has high strength, and its shape protrudes from the road surface without compromising its function as an indicator light at all. Since the connecting part is flat and its height can be reduced, it is less likely to be damaged by external load impacts, etc., and the function and reliability of the indicator light are significantly improved.

[Brief explanation of drawings]

FIG. 1 is a cutaway side view showing an embodiment of the diffusion lens of the present invention;
FIG. 2 is a similar sectional view showing another *embodiment, and FIG. 3 is a sectional view of the main part showing the lens installed as an indicator light. 1.2.3...Lens part 4,4...Reflecting mirror layer A...Lower end face B...Upper end face...Diffusion lens □3n t2 Figure 3

Claims (1)

[Claims] It is a rotating body whose rotation axis is a straight line passing through the center of a circular upper end face and perpendicular to the end face, and at least one reflective mirror layer having a shape that gradually expands toward the top is formed inside. A diffuser lens for indicator lights made of a distinctive transparent glass-like substance.