DE1516726A1 - Signal light, in particular rear light for motor vehicles - Google Patents

Description

Westphalian Metall Industrie KG Lippstadt / August 14, 1969

• PAT / Bg / Mä. Hue ck & Co No. 2082

New description of the patent application: "Signal light, especially tail light for motor vehicles"
File number: ρ 15 16 726.1-21

The invention relates to a signal light, in particular ^ Rear light for motor vehicles, with preferred illumination a narrow ring surface of the lens.

In the known lights, the reflector is parabolic, and the filament of the incandescent lamp is arranged at the focal point of the reflector, so that the reflecting light falls parallel to the optical axis on the lens. Diffusing lenses arranged in the lens provide the necessary side scatter. The scattering lenses can only be used for the reflected light, but not for the directly emerging light | be designed. In another type of luminaire, a ring prismatic disk is placed in front of the lens, which directs the light emitted directly from the incandescent lamp in parallel. A reflector cannot be used in such a lamp, since the light falling parallel to the ring prisms would be scattered and largely reflected again. So only part of the light generated by the incandescent lamp is used. _:

Such luminaire designs result in a large signal

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area, which is good for early detection of a signal light has an advantageous effect, however, in the case of signal lights, it is not only the size of the signal area that is important, but also also the luminance. This is for a given incandescent lamp power the smaller the larger the light exit area in the lens. But it is a definite one Luminance required to be able to recognize a light signal even during the day.

In the case of an optical signal device it has already become known to concentrate the light on an outer ring surface of the lens. For this purpose the incandescent lamp is equipped with a deposited with a small spherical reflector that captures the light emitted by the incandescent lamp in a small solid angle and and projected through a small opening onto a lens arranged in front of the light bulb. The lens breaks the light outwards so strongly that it falls on a reflector arranged around the lens, and from here on a narrow one Ring surface of the lens is reflected. The directly failing one Light from the incandescent lamp comes from additional reflectors however, covered to a large extent. That which strikes the lens directly Light is also directed onto the narrow ring surface so that the middle area of the light disc is not

is illuminated. This signal device is not only from a lighting point of view, such. B. insufficient design of the middle area of the lens and several times Redirection of the light rays, disadvantageous, but rather them

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is also cumbersome and complex in its structure and therefore for signal lights that are manufactured in large series, not suitable.

In contrast, the invention proposes the one that is known per se Way behind the incandescent lamp arranged reflector in such a way. to train that the reflected light from the reflector is a ring bundled and projected onto the narrow ring surface of the light disc, which, as is known, with prisms is provided, which incline the radially scattered emerging light towards the optical axis of the lamp and at the same time tangentially scatter while the direct emitted light from the incandescent lamp exits through the middle part of the lens.

The advantage of a lamp designed in this way is that despite a large signal area, especially its outer edge has high luminance> so that the contrast from the signal surface is particularly clear to the external environment. Another advantage is that for the reflected light a other light distribution can be made in the lens can than for the direct * emerging light. This allows with Except for the narrow, outer ring surface of the lens Directly incident light all of the incandescent lamp generated light can be used »In addition, the required! »light values of the one to the side of the tail light Areas are better adhered to.

The concept of the invention is particularly advantageous in the case of a

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The luminaire is off, in the inner area of the light-emitting surface arranged a reflector having empty areas is, which is backed with a lens-bearing disc, and the lenses each have an empty surface of the reflector assigned. Since the light must strike the lenses running parallel, it was not possible to use the previously known lights either just that from the reflector or the direct, from A prismatic arranged in front of the lenses light can be used. In a lamp according to the invention however, both the reflected and the directly emerging light are used by, as is known per se, on On one side of the disc carrying the lenses, ring prisms are applied, which parallel the directly emerging light direct, while the reflected light emerges from an annular surface surrounding the reflector.

The drawing illustrates an embodiment of the invention, namely shows

Fig. 1 is a longitudinal section through the lamp,

while
Fig. 2 shows a section AB through the cylinder prisms arranged radially at the edge of the light exit surface.

The reflector 1 of the lamp according to the invention is designed in such a way that that it reflects the light bundled in a wreath shape onto an only narrow annular surface 2 on the outer edge of the lens 3

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so that this area of the lens has a high luminance having. This ring surface is occupied by ZyI Indian prisms .4, which the radially scattered emerging light rays 5 to incline optical axis 6 and also scatter tangentially, as shown by the path of rays 5a and 5b. The directly emerging light 7 is through the ring prisms 8 directed parallel and falls through the lenses 9 scattered from the Empty surfaces 10 of the reflector 11 from. .

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Claims (1)

Expectations 1. Signal light, in particular tail light for motor vehicles, with preferred illumination a narrow ring surface of the lens, especially for motor vehicles, characterized in that the arranged in a manner known per se behind the incandescent lamp The reflector (1) is designed such that the reflected from the reflector Light bundled in a wreath and on the only narrow annular surface (2) of the lens (3) is projected, which, as is known, is provided with prisms (4), which the radially scattered leaking Lieht (5) to incline the optical axis (6) of the light, while the directly emerging light (7) the light bulb through the middle part of the Light disc emerges. 2. Light according to claim 1, characterized in that that the arranged on the ring surface (2) and the light to the optical Axis (6) inclined prisms (Λ) that Scatter light tangentially at the same time, . Luminaire according to Claim 1 and 2, characterized - 7 ~ ■ ÖO9827 / 0226 ._ ' "- - τ ■ - ■ ■■ ..', - - ■■■■■ '■ ■■■■■■ characterized in that the annular surface (2) of the lens is arranged radially Has cylindrical prisms (4) which are inclined towards the light exit surface. 4. Lamp according to claims 1 to>, characterized in that in the inner area of the light exit surface an empty area (10) is arranged m the reflector (11), which is deposited with a © ptische means (2, 9) supporting disc is, which, as known per se, carries the light-collecting ring prisms (8) on its side facing the reflector and is occupied on the other side with lenses (9) which are each assigned to an empty surface (10) of the reflector. ' ^v .. ■■■■ ^{:: ·:} ■. :: ■ ·. ■ i 009827/0226 Blank page