BRIEF DESCRIPTION OF THE DRAWINGS
The invention is to be explained in more detail below with the aid of the drawings, namely FIG. 1 to FIG. 7, in which:
FIG. 1 shows a partially cut away side view of an exemplary embodiment of an inventive reflector,
FIG. 2 shows a sectional view of an inventive reflector,
FIG. 3 shows a schematic view of the rear side of an inventive reflector,
FIG. 4 shows a plan view of an exemplary embodiment of an inventive reflector,
FIG. 5 shows a plan view of an alternative embodiment of a reflector,
FIG. 6 shows an exemplary embodiment of an inventive luminaire, and
FIG. 7 shows a schematic view of a detail of an inventive reflector in accordance with FIG. 3.
DETAILED DESCRIPTION OF THE DRAWINGS
Referring to FIG. 1, the aim is to explain in more detail the essential features of an exemplary embodiment of an inventive reflector 1. The reflector 1 comprises a main element 2 and a holder for a luminous means 4. The main element 2 is substantially of rotationally symmetrical design about a rotation axis 5.
The holder for the luminous means 4 is located at the base of the main element 2 and is, for its part, not of rotationally symmetrical design.
The right hand side of the reflector 1 is cut away in this illustration. Visible on the left hand side of the reflector are the reflection prisms 3, which emanate in a substantially radial fashion from the holder for the luminous means 4, and run upward in a star shaped fashion.
The reflector 1 consists of pressed glass and is preferably fitted with a halogen luminous means (not illustrated).
The reflector 1 has approximately 30 reflection prisms 3. The reflection prisms 3, which run in a star shaped fashion around the rotation axis 5, substantially follow the inclination of the main element 2.
In order to achieve a higher efficiency, it is also possible to deviate in sections from this essentially tangential course (not illustrated).
FIG. 2 shows a schematic sectional illustration of an exemplary embodiment of an inventive reflector. This sectional illustration particularly depicts the glass walls 6 of the main element, which merge seamlessly into the holder of the luminous means 4.
The reflector is therefore of unipartite design. The holder for the luminous means 4 has an essentially conically tapering fit 7. This ensures that the luminous means (not illustrated) is arranged in a defined position.
The reflector 1 is provided on the light exit side with a cover plate 8 that is glued onto a circumferential web. The cover plate 8 is constructed from a UV absorbing material, and serves simultaneously as shatter guard.
FIG. 3 shows a schematic view of the rear side of an exemplary embodiment of an inventive reflector 1. Visible in particular are the 30 reflection prisms 3 that run in a star shaped fashion around the holder for the luminous means 4.
The holder for the luminous means has two bushings 10 for the contacts of the luminous means (not illustrated). When equipped with a luminous means (not illustrated), the reflector can then be inserted into a lamp (not illustrated).
FIG. 4 shows a plan view of the front side of an exemplary embodiment of an inventive reflector. The main element 2 of the reflector is of smooth design in this exemplary embodiment, and so the light beams (not illustrated) can pass through the smooth surface into the reflection facets.
FIG. 5 shows an alternative embodiment of the reflector 1, in which the inside surface of the reflector main element 2 is provided with facets. The light beams (not illustrated) can be specifically aligned in the direction of the normals to the reflection prisms via the facets.
The efficiency is further improved when the facets are designed as curved cylindrical lenses.
FIG. 6 shows a schematic exemplary embodiment of an inventive luminaire 11. The luminaire 11 comprises a reflector 2, in which a luminous means 12, configured here as a halogen lamp, is glued. The luminous means is thus optimally positioned in order to achieve an optimum efficiency of the reflector 2.
A cover plate 8 prevents the emergence of UV radiation, and simultaneously serves as shatter guard.
Referring to FIG. 7, which shows a view of a detail of an exemplary embodiment of a reflector, the aim is to explain the geometry of the reflection prisms 3 in more detail. The reflection prisms 3, which emanate in a star shaped fashion from the holder for a luminous means 4 have at the tips 13 an edge radius of less than 0.3 mm. The same holds for the transition edges 14 between the individual reflection prisms.
The reflection prisms 3 have a tip angle, that is to say an angle at the tip 13, of 90°.
It goes without saying that the invention is not limited to a combination of the previously named features, but that the person skilled in the art will combine all the named features to a sensible extent.
List of Reference Numerals
1 Reflector
2 Main element
3 Reflection prism
4 Holder for luminous means
5 Rotation axis
6 Glass wall
7 Fit
8 Cover plate
9 Web
10 Bushing
11 Luminaire
12 Luminous means
13 Tip
14 Transition edge
Patent Application
20080019138
