DE2829969A1 - REFLECTOR DEVICE - Google Patents

Description

- 3 description;

"Reflector device" priority: P. July 1977, No. 77 21193, France

The invention relates to a reflector device. It also relates to a lighting device with such a reflector device.

The problem often arises, a given area, for example to illuminate an assembly chain correctly, without the workers working on the assembly chain through the direct Lighting would be disturbed.

The invention is based on the object of a reflector device for a tubular lamp that meets these requirements.

The solution to this problem and advantageous embodiments are specified in the claims.

The invention is illustrated schematically in the following on the basis of the figures illustrated embodiment explained in more detail. It shows:

Fig. 1: A cross section through a device according to the invention,

2: a perspective illustration of a lighting device, which is equipped with a device according to the invention.

609884 / 0Ö3S

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In Fig. 1, a light source 1 can be seen, which can be, for example, a tubular lamp or a fluorescent tube. According to the invention, a parabolic reflector is provided, which is shown schematically by the parabola AB. The focal point F 1 of the parabola lies on the XY axis, on which the center F of the light source 1 also lies. The parabolic reflector throws a bundle of light, shifted with respect to the vertical axis XY and symbolized by the two bundles χ and y (only shown in FIG. 1) in the usable area to be illuminated. In fact, the width L of this bundle would be larger and more disturbing for all observers who would see it. According to a second feature of the invention, at least one second elliptical reflector is provided. It cooperates with the first reflector 2 in order to fulfill two functions: on the one hand, it acts like a screen that reduces or completely suppresses this disruptive light radiation and, on the other hand, it acts as an additional reflector that increases the efficiency of the lighting device by reducing the radiation impinging on it throws against the parabolic reflector 2. The focal points of the elliptical reflector 3, which is indicated schematically by the EUjLpse CD, are FF ', where F is in the center of the light source 1 and F ^{1 is} the center of the virtual light source 4 (shown in dotted lines). This is also on the XY axis.

The marginal rays emanating from the light source which hit the reflector 2 are denoted by U ^ and v. designated.

In order to lose as little lighting energy as possible, while at the same time the aim according to the invention is sought, namely to obtain a directional light beam that with respect to a Axis XY is shifted, the device described can have a set of additional reflectors, for example can be equally elliptical and those in the figure with

809884/0935

the reference numerals 5 and 6 are provided. The focal points of the reflector 6 are F and F ¹ and the focal points of the reflector 5 are F'F2 ^f . The light rays striking these reflectors are thrown into the surroundings of the usable area. Otherwise they would be lost without these reflectors.

As can be seen from Fig. 2, the device of Fig. 1, the in a combination of two reflectors 2 and 3 and possibly two additional reflectors 5 and 6, inside a housing 10 arranged. The unit formed in this way represents a lighting device that is suspended or for example can be embedded in the ceiling of a room.

The angle between that directed by the reflector device Light beam and the XY axis, which often coincides with the vertical and passes through the center or focal point of the Lichtauelle goes, can be optimally adjusted by the position of the parabolic reflector 2 in the interior of the housing 10 and, under certain circumstances, the position of the elliptical reflector 3 is also adjusted.

This non-zero angle can depending on the desired Area of application can be selected. It is preferably between 40 and 50 °. For the relative positioning of the For example, a rack and pinion system can be used for reflectors with respect to the light source.

The device described can in particular be used for optimal illumination of an assembly chain or other workstation be used. The workers looking at the work chain are not affected by the light radiation.

809884/0935

Claims (5)

H N "J: RriiV.i ·! rkitlSCH M Π u C r! i- N 2 7. j _u n 197p G O T I 'A P IJ SFR. F 10.420-V / vm COMPAGNIE DES LAMPES, 29 Rue de Lisbonne, 75OOP Paris (France) Patent claims: y reflector device for a tubular lamp, characterized by : a first parabolic reflector (2), which throws the light beam into the usable space to be illuminated, in a direction that coincides with that through the center P of the lamp (1) and the focal point P 1 the parabolic axis forms an angle different from zero, and an elliptical reflector (3) which, fulfilling the puncture of a screen, reflects the radiation incident on it against the parabolic reflector (2). 2. Device according to claim 1, characterized in that it has additional reflectors (5, 6) with the parabolic and the elliptical reflector (2, 3) cooperate to the radiation impinging on them in the useful area or its Throwing environment. 3. Device according to claim 1 or 2, characterized in that the angle is between * iO ° and 50 °. 4. Lighting device, characterized by a frame (10) on which a reflector device according to one of the claims 1 to 3 is arranged. 809884/0935 ORIGINAL INSPECTED 5. Lighting device according to claim 4, characterized in that that they have an adjustment device for the reflector device contains, through which this in relation to the Lamp (1) is adjustable. 809884/0935