DE10300885A1 - Lamp especially pendant lamp has light source ellipsoidal reflector counter fresnel reflector with a small opening and a transparent housing - Google Patents

Abstract

A lamp, especially a pendant lamp comprises a light source (8) and an ellipsoidal main reflector (9) sending light down to an opposite, Fresnel, reflector (2) with part of the light passing through a small opening in this reflector. The light and reflectors are mounted in a transparent housing (1).

Description

The invention relates to a lamp with a light source in an ellipsoidal reflector, a transparent housing and a counter reflector with an opening.

The principle of the "Ulbricht light ball" is known from lighting technology. As a continuation of this principle, the utility model shows G 8425253. 7 is a spherical lamp that generates an ellipsoidal reflector through a hemisphere. The luminous flux concentrated in this way on a focal point is sent through a small hole in the opposite hemisphere. This is a very effective light source with a fading that is hard to beat.

The invention described in the patent DE 353428 A shows a lamp that realizes the problem of avoiding glare and light control in a very interesting way. Here, a blanking element arranged below the lamp is used due to its shape and surface for light control for brightening the ceiling. This reflector has an opening through which a large part of the lamp light is radiated downwards. The in the patent DE 3836282 C2 The invention described also relates to a lamp-reflector unit with a similar effect. However, this is a ceiling lamp with a counter reflector, which also has a large opening for the direct beam downwards. A certain proportion of the light from the reflector is emitted flat to the side and serves to brighten the ceiling.

The inventions described have a big Contribution to avoid direct glare.

These systems blind the light source very good, but this has a major disadvantage, so show the faces of the people in the room so-called "dark circles" These arise by the light coming from above, which causes shadows on the facial features. The vertically acting light component necessary for lightening the face is missing.

Another disadvantage of the previous one Luminaires shown represent the screw connections and holders. These keep the counter reflector and main reflector at a distance. Since it is inevitable in the area of the counter reflector light, they lead to shading that project up to the ceiling.

The invention seeks to remedy these deficiencies. The Invention as set out in the claims is marked, triggers the task of creating a lamp, preferably as a pendant lamp, a glare-free brightening due to the laterally emitting light component causes (vertically effective lighting component).

Through the transparent housing there there is no annoying Shading e.g. on the ceiling. In addition, in the interior color film strip, which is easily accessible for changing the lamp be introduced. For example, the proportion of light used for vertical illumination can be used to correct the light color. So-called skintone filters can when using the lamp as z. B. dining table lamp a friendly, generate soothing light for the psyche. The wellness area can have certain Color emotions are positively influenced.

Arises in the main beam direction however, no loss of light. The illustrated invention thus achieves the greatest possible utilization of the luminous flux emitted by the lamp. It becomes the harmful direct glare avoided by the illuminant.

All important lighting areas can with the lamp described can be supplied with high quality light.

Further development of the invention

In the in 3 and 4 shown representations, the lamp according to the invention is shown in a double arrangement. With this type 25 the invention can be achieved by doubling a double light output. Due to the partially overlapping radiation, the downward and upward portions can be made very uniform.

In the following drawings, two embodiments of the invention are based on the 1 to 4 explains:

1 A sectional view of the lamp with a light source

2 A perspective view of the lamp

3 Shows a further application of the invention in the form of a double arrangement (double lamp)

4 Shows a perspective view of the double lamp

1

transparent casing

2

retroreflex with Fresnel structure

3

Reflector outer casing

4

Reflector inner housing

5

pendulum rod

6

Pendulum steel rope (e.g. elect.-pol.)

6.1

Pendulum steel rope (e.g. elect. + pol)

7

power cable

8th

lamp

9

Ellipsoidal reflector

10

To light area above

11

Lower emission port

12

insert film

13

radius at the top of a Fresnel ring

Claims (1)

Luminaire with a light source in a reflector as well as a counter reflector and a transparent housing is characterized by the fact that an ellipsoidal main reflector emits light downwards. This light strikes a counter reflector - as is known per se - due to the cross-radiation characteristics of the reflector, a portion of the light passes down through a relatively small opening. Luminaire according to claim 1, characterized in that the counter reflector ( 2 ) over small radii ( 13 ) at the tips of the Fressnell rings. These radii radiate a portion (L3) of the light without glare, flat through the housing ( 1 ) as vertical brightening. Luminaire according to claim 2, characterized in that the counter reflector ( 2 ) to change the lamp ( 8th ) or the foils ( 12 ) can be easily released and reinserted using a spring washer. Luminaire according to claim 3, characterized in that the transparent housing ( 1 ) in the section ( 10 ) can be provided with optically effective structures that can expand or direct the light area (L2). Luminaire according to claim 4, characterized in that the transparent housing ( 1 ) protects the luminaire from dirt inside and has no disruptive construction elements that destroy light and could lead to disruptive shading. Luminaire according to claim 5, characterized in that the features shown in claims 1 to 6 in a double arrangement ( 3 and 4 ) can be used.