SIGHT DEVICE

• US 20160238343A1
• Filed: 10/13/2014
• Published: 08/18/2016
• Est. Priority Date: 10/17/2013
• Status: Active Grant

• Current Assignee: MB - Microtec AG
• Original Assignee: MB - Microtec AG
• Inventors: JAKOB, Daniel, KIND, Hannes
• Granted Patent: US 9,921,034 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F41G 1/345 for illuminating the sights
• CPC Class Codes: G02B 23/105 Sighting devices with light source and collimating reflector reflecting sights for small arms having light source F41G1/34
• CPC Class Codes: G02B 23/2469 using optical fibres
• CPC Class Codes: G02B 6/0003 the light guides being doped with fluorescent agents
• CPC Class Codes: G21H 3/02 in which material is excited to luminesce by the radiation lamps in which a gas filling or screen or coating is excited to luminesce by radioactive material structurally associated with the lamp H01J65/00

Abstract

The invention relates to a sight device (1), in particular a reflector sight or telescopic sight, which sight device has a lighting apparatus (2) for producing or illuminating a target mark, wherein the lighting apparatus (2) comprises an light guide (3) made of photoluminescent, in particular fluorescent material and a radioluminescent light source (7) coupled to the light guide (3), wherein the light guide (3) is designed to receive ambient light and convert said ambient light into photoluminescence light along at least one segment (4) of the longitudinal extent of the light guide, and wherein the absorption spectrum (10) of the photoluminescent material of the light guide (3) and the emission spectrum (9) of the radioluminescent light source (7) in the visible range can both be characterized by a spectral bandwidth and a center wavelength. In order to increase the luminance of the lighting apparatus and thus the visibility of the target mark, the center wavelength of the emission spectrum (9) of the radioluminescent light source (7) is greater than the center wavelength of the absorption spectrum (10) of the photoluminescent material of the light guide (3).

Claims

1. :

A sight device (1), in particular a reflector sight or telescopic sight, which comprises lighting apparatus (2) for generating or illuminating a target mark, wherein the lighting apparatus (2) comprises a light guide (3) made of photoluminescent, in particular fluorescent material and a radioluminescent light source (7) coupled to the light guide (3), wherein the light guide (3) is designed to receive ambient light along at least a section (4) of its longitudinal extension and convert it into photoluminescent light, and wherein the absorption spectrum (10) of the photoluminescent material of the light guide (3) and the emission spectrum (9) of the radioluminescent light source (7) in the visible range can both comprise a spectral bandwidth and a center wavelength, wherein the center wavelength of the emission spectrum (9) of the radioluminescent light source (7) is greater than the center wavelength of the absorption spectrum (10) of the photoluminescent material of the light guide (3).

2. :

The sight device as claimed in claim 1, wherein the center wavelength of the emission spectrum (9) of the radioluminescent light source (7) is at least 30 nm, preferably at least 50 nm, greater than the center wavelength of the absorption spectrum (10) of the photoluminescent material of the light guide (3).

3. :

The sight device as claimed in claim 1, wherein the spectral bandwidth of the emission spectrum (9) of the radioluminescent light source (7) and the spectral bandwidth of the absorption spectrum (10) of the photoluminescent material of the light guide (3) each amounts to at most 100 nm, preferably at most 80 nm.

4. :

The sight device as claimed in claim 1, wherein the spectral bandwidth of the emission spectrum (9) of the radioluminescent light source (7) and the spectral bandwidth of the absorption spectrum (10) of the photoluminescent material of the light guide (3) do not overlap.

5. :

The sight device as claimed in claim 1, wherein in the visible range at most 30%, preferably at most 20%, of the emission spectrum (9) of the radioluminescent light source (7) overlaps with the absorption spectrum (10) of the photoluminescent material of the light guide (3).

6. :

The sight device as claimed in claim 1, wherein in the visible range at least 50%, preferably at least 70%, of the emission spectrum (9) of the radioluminescent light source (7) overlaps with the emission spectrum (11) of the photoluminescent material of the light guide (3).

7. :

The sight device as claimed in claim 1, wherein the emission spectrum (9) of the radioluminescent light source (7) is in the green and/or yellow wavelength range.

8. :

The sight device as claimed in claim 1, wherein the emission spectrum (11) of the photoluminescent material of the light guide (3) is in the green wavelength range.

9. :

The sight device as claimed in claim 1, wherein the radioluminescent light source (7) is arranged at an end side (6) of the light guide (3), whereby light of the radioluminescent light source (7) is directed through the end side (6) into the light guide (3).

10. :

The sight device as claimed in claim 9, wherein the end side (6) of the light guide (3) is adhered by means of a transparent adhesive to the radioluminescent light source (7).

11. :

The sight device as claimed in claim 9, wherein the radioluminescent light source (7) has a longitudinal extension which is perpendicular to the axis of the light guide (3) in its end section.

12. :

The sight device as claimed in claim 9, wherein the end side (6) of the light guide (3) facing the radioluminescent light source (7) is a polished surface.

13. :

The sight device as claimed in claim 1, wherein the sight device (1) comprises a reverse prism (12), preferably a Schmidt-Pechan prism, arranged in the beam path and wherein the end side (5) of the light guide (3), which faces away from the radioluminescent light source (7), is aligned to an in particular circular opening in a mirrored plane surface of the reverse prism (12).

14. :

The sight device as claimed in claim 1, wherein the end side of the light guide (3) facing away from the radioluminescent light source (7) is a polished surface, which preferably faces a prism for directing the light into a beam path of the sight device (1).

15. :

The sight device as claimed in claim 1, wherein the radioluminescent light source (7) is covered by a coating (8), which reflects the light produced by the radioluminescent light source (7) back to the latter, wherein preferably the coating (8) is a white color, particularly preferably a color pigmented with TiO₂.

16. :

The sight device as claimed in claim 15, wherein the coating is applied onto the surface of the radioluminescent light source (7) or wherein the coating is applied onto the inner side of a housing (13) surrounding the radioluminescent light source (7).

17. :

The sight device as claimed in claim 1, wherein the radioluminescent light source (7) and an end section of the light guide (3) bordering the radioluminescent light source (7) are surrounded by a housing (13) essentially in a form-fitting manner.

18. :

The sight device as claimed in claim 17, wherein the housing (13) is made in two parts, wherein preferably the two parts can be pivoted relative to one another or can be held together by means of a snap device (15).

19. :

The sight device as claimed in claim 17, wherein the housing (13) comprises at least one opening (14), which leads from the outside to the coupling point between the radioluminescent light source (7) and the light guide (3), in particular for introducing an adhesive.

20. :

The sight device as claimed in claim 17, wherein in the housing (13) at least one screw (16) sits in a screw thread, by means of which the radioluminescent light source (7) and/or an end section of the light guide (3) bordering the radioluminescent light source (7) is/are clamped.

21. :

The sight device as claimed in claim 1, wherein the radioluminescent light source (7) and an end section of the light guide (3) bordering the radioluminescent light source (7) are surrounded by an in particular T-shaped shrink tube.

22. :

The sight device as claimed in claim 1, wherein the radioluminescent light source (7) together with an end section of the light guide (3) bordering the radioluminescent light source (7) is molded into a material.