Optical system

Abstract

The present invention discloses an optical system comprising: a light source (1); a reflection hood (2); a shielding cone (3) arranged below the reflection hood (2); and a double focus lens (4) arranged between the light source (1) and the shielding cone (3).

Claims

1. An optical system comprising: a light source; light beams emitted by the light source; a reflection hood; a shielding cone arranged below the reflection hood; and a double focus lens arranged between the light source and the shielding cone which creates an intersection of the light beams in a position below the shielding cone.

2. The optical system of claim 1, wherein the double focus lens arranged between the light source and the shielding cone is at least partially arranged inside the reflection hood.

3. The optical system of claim 1, wherein the double focus lens has the shape of a double parabola, wherein the two parabolas are arranged in such a way that the vertices of said parabolas are the farthest points from each other.

4. The optical system of claim 1, wherein the reflection hood in turn comprises a flat bottom surface, wherein the double focus lens is completely contained in the reflection hood, arranged on the flat bottom surface, the double focus lens being arranged adjacent to an upper end of the shielding cone.

5. The optical system of claim 1, wherein the reflection hood in turn comprises a bottom surface curved towards the inside of said reflection hood, wherein the double focus lens is completely contained in the reflection hood, arranged on the bottom surface curved towards the inside of said reflection hood.

6. The optical system of claim 1, wherein the reflection hood comprises a corrugated bottom surface, wherein the double focus lens is completely contained in the reflection hood, arranged on the corrugated bottom surface that is inside the inner space of the shielding cone.

7. The optical system of claim 1, wherein the shielding cone defines a shielding angle greater than 30.

8. The optical system of claim 2, wherein the double focus lens has the shape of a double parabola, wherein the two parabolas are arranged in such a way that the vertices of said parabolas are the farthest points from each other.

9. The optical system of claim 2, wherein the reflection hood in turn comprises a flat bottom surface, wherein the double focus lens is completely contained in the reflection hood, arranged on the flat bottom surface, the double focus lens being arranged adjacent to an upper end of the shielding cone.

10. The optical system of claim 3, wherein the reflection hood in turn comprises a flat bottom surface, wherein the double focus lens is completely contained in the reflection hood, arranged on the flat bottom surface, the double focus lens being arranged adjacent to an upper end of the shielding cone.

11. The optical system of claim 2, wherein the reflection hood in turn comprises a bottom surface curved towards the inside of said reflection hood, wherein the double focus lens is completely contained in the reflection hood, arranged on the bottom surface curved towards the inside of said reflection hood.

12. The optical system of claim 3, wherein the reflection hood in turn comprises a bottom surface curved towards the inside of said reflection hood, wherein the double focus lens is completely contained in the reflection hood, arranged on the bottom surface curved towards the inside of said reflection hood.

13. The optical system of claim 2, wherein the reflection hood comprises a corrugated bottom surface, wherein the double focus lens is completely contained in the reflection hood, arranged on the corrugated bottom surface that is inside the inner space of the shielding cone.

14. The optical system of claim 3, wherein the reflection hood comprises a corrugated bottom surface, wherein the double focus lens is completely contained in the reflection hood, arranged on the corrugated bottom surface that is inside the inner space of the shielding cone.

15. The optical system of claim 1, wherein the shielding cone defines a shielding angle greater than 45°.

Description

DESCRIPTION OF THE DRAWINGS

(1) As a complement to the description provided herein, and for the purpose of helping to make the characteristics of the invention more readily understandable, in accordance with a preferred practical exemplary embodiment thereof, said description is accompanied by a set of drawings constituting an integral part thereof which, by way of illustration and not limitation, represent the following:

(2) FIG. 1 shows a schematic view of the optical system of the present invention for a first exemplary embodiment.

(3) FIG. 2 shows a schematic view of the optical system of the present invention for a second exemplary embodiment.

(4) FIG. 3 shows a schematic view of the optical system of the present invention for a third exemplary embodiment.

(5) FIG. 4 shows a schematic view of the set of light beams obtained with the optical system of FIG. 2.

(6) FIG. 5 shows a schematic view of the set of light beams obtained with the optical system of FIG. 3.

PREFERRED EMBODIMENT OF THE INVENTION

(7) The optical system of the present invention is described in detail below.

(8) The optical system comprises: a light source (1); a reflection hood (2); a shielding cone (3) arranged below the reflection hood (2); and a double focus lens (4), preferably in the shape of a double parabola, wherein the two parabolas are arranged in such a way that the vertices of said parabolas are the farthest points from each other, wherein the double focus lens (4) is arranged between the light source (1) and the shielding cone (3).

(9) The double focus lens (4) arranged between the light source (1) and the shielding cone (3) is at least partially arranged inside the reflection hood (2), as shown in the exemplary embodiments that are explained below and shown in FIGS. 1 to 5.

(10) In a first exemplary embodiment shown in FIG. 1, the optical system comprises the light source (1), preferably an LED, the reflection hood (2) that in turn comprises a flat bottom surface (6) and the shielding cone (3) arranged below the reflection hood (2).

(11) In this first exemplary embodiment, the optical system further comprises the double focus lens (4) in the shape of a double parabola arranged between the light source (1) and the shielding cone (3), wherein said double focus lens (4) is completely contained in the reflection hood (2), more specifically arranged on the flat bottom surface (6), the double focus lens (4) being arranged adjacent to an upper end (7) of the shielding cone (3).

(12) In a second exemplary embodiment shown in FIGS. 2 and 4, the optical system comprises the light source (1), preferably an LED, the reflection hood (2) that in turn comprises a bottom surface (8) curved towards the inside of said reflection hood (2) and the shielding cone (3) arranged below the reflection hood (2).

(13) In this second exemplary embodiment, the optical system further comprises the double focus lens (4) in the shape of a double parabola arranged between the light source (1) and the shielding cone (3), wherein said double focus lens (4) is completely contained in the reflection hood (2), more specifically arranged on the bottom surface (8) curved towards the inside of said reflection hood (2).

(14) In a third exemplary embodiment shown in FIGS. 3 and 5, the optical system comprises the light source (1), preferably an LED, the reflection hood (2) that in turn comprises a corrugated bottom surface (9) and the shielding cone (3) arranged below the reflection hood (2).

(15) In this third exemplary embodiment, the optical system further comprises the double focus lens (4) in the shape of a double parabola arranged between the light source (1) and the shielding cone (3), wherein said double focus lens (4) is completely contained in the reflection hood (2), more specifically arranged on the corrugated bottom surface (9) that is inside the inner space of the shielding cone (3).

(16) As shown in FIGS. 4 and 5 corresponding to the second and third exemplary embodiments, respectively, due to the fact that the double focus lens (4) is at least partially arranged between the light source (1) and the shielding cone (3), the light beams (5) emitted by the light source (1) do not shine on the inside of the shielding cone (3), such that the light output is not affected, since said shielding cone does not absorb said light beams.

(17) Likewise, FIGS. 4 and 5 show that the reflection hood (2) enables the majority of light beams (5) coming from the light source (1) to be redirected, while the double focus lens (4) enables the creation of a second virtual focus (10) or new intersection of light beams, in a position below the shielding cone (3), in other words, away from it (3), which prevents internal reflections in the shielding cone that the observer could perceive even within the shielding angle (α) or cut-off angle.

(18) The angle of the shielding cone (α) or cutoff angle is greater than 30° for the examples shown, preferably greater than 45°, such that shielding is reduced as much as possible.