Diffuse light source and visual dazzler system made therefrom

• US 9,732,941 B2
• Filed: 03/11/2014
• Issued: 08/15/2017
• Est. Priority Date: 03/11/2013
• Status: Active Grant

• Current Assignee: Lighthouse Tech Pte., Ltd.
• Original Assignee: Lighthouse Tech Pte., Ltd.
• Inventors: Maier, Nathan Christopher
• Primary Examiner(s): Garlen, Alexander
• Application Number:
  US14/774,879
• Publication Number:
  US 20160025305A1
• Time in Patent Office: 1,253 Days
• CPC Class Codes: F21K 9/65 specially adapted for changing the characteristics or the distribution of the light, e.g. by adjustment of parts
• CPC Class Codes: F21L 4/00 Electric lighting devices with self-contained electric batteries or cells
• CPC Class Codes: F21V 13/04 the elements being reflectors and refractors for vehicle rear lights F21S43/40
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21W 2131/40 Lighting for industrial, commercial, recreational or military use
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: F21Y 2115/30 Semiconductor lasers
• CPC Class Codes: F41H 13/00 Means of attack or defence not otherwise provided for details of radar or sonar systems G01S7/00
• CPC Class Codes: F41H 13/0087 the high-energy beam being a bright light, e.g. for dazzling or blinding purposes F41H13/0056 takes precedence
• CPC Class Codes: G02B 19/0028 refractive and reflective surfaces, e.g. non-imaging catadioptric systems
• CPC Class Codes: G02B 19/0061 the light source comprising a LED semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission H01L33/00

Abstract

A diffuse light source, for use in energy efficient lighting, as well as for visual disorientation or disruption systems, is configured with a single solid torus (15) or rotating dual cylinder (35a, 35b) diffuser of transparent refracting material into which light (13, 33) from a laser or LED beam source (11, 31) is coupled. Light (19, 39) emerges radially outward in all directions from the diffuser.

Claims

1. A visual dazzler system for temporarily disorienting subjects to light projected from the system, comprising a case containing and delivering electrical power to a light beam source and also containing a solid diffuser element of transparent refractive material optically coupled to receive a light beam from the beam source at tangential or near tangential incidence such that the received light beam is partially reflected and partially refracted multiple times within the diffuser element and thereby is projected radially outward from the diffuser over a wide distribution to any of one or more subjects in line of sight of the projected light;

wherein the diffuser element comprises a ring torus of solid transparent refracting material, the torus characterized by a surface of revolution generated from rotation of a closed plane curve about an axis coplanar with, outside of, and proximate to the curve, the light beam source positioned relative to the torus such that a light beam from the source is directed substantially along the axis of the torus, the beam having a width so as to be coupled into the torus and partially reflected and partially refracted therein at the torus surface, the torus having a reflective coating on a rear source-side surface located be and the extent of the incident beam such that light emitted from the torus diffuser is tailored to have a specified distribution pattern.

2. The visual dazzler system as in claim 1, wherein the case is a flashlight-style case.

3. The visual dazzler system as in claim 2, wherein the flashlight-style case has a mount for attachment to a firearm.

4. The visual dazzler system as in claim 2, wherein the flashlight-style case is generally cylindrical in shape so as to be adapted for handheld operation.

5. The visual dazzler system as in claim 1, wherein the case is adapted for thrown operation with a weighted base and a break-resistant transparent hemispherical cover attached to the base, with the beam source and diffuser attached to the base under the cover.

6. The visual dazzler system as in claim 1, wherein the case further holds a battery power supply for the light beam source.

7. The visual dazzler system as in claim 1, wherein the light beam source is a laser.

8. The visual dazzler system as in claim 1, wherein the light beam source is at least one light emitting diode (LED).

9. The visual dazzler system as in claim 1, wherein the light beam source provides continuous light output.

10. The visual dazzler system as in claim 1, wherein the light beam source provides pulsed light output.

11. The visual dazzler system as in claim 1, wherein the light beam source has a visible or infrared output wavelength or range of wavelengths corresponding to optical sensors of specified surveillance or weapons guidance systems.

12. The visual dazzler system as in claim 1, wherein the diffuser element projects light radially outward over a distribution angle of at least 75°

.

13. A visual dazzler system for temporarily disorienting subjects to light projected from the system, comprising a case containing and delivering electrical power to a light beam source and also containing a solid diffuser element of transparent refractive material optically coupled to receive a light beam from the beam source such that the received light beam is partially reflected and partially refracted multiple times within the diffuser element and thereby is projected radially outward from the diffuser over a wide distribution to any of one or more subjects in line of sight of the projected light, the solid diffuser element characterized by a section in a plane containing the light beam that is defined by a pair of side-by-side separated closed plane curves;

wherein the diffuser element comprises a pair of side-by-side cylinders of solid transparent refracting material with substantially parallel cylindrical axes, the light beam from the source being directed toward a point of contact of the two cylinders with an incident orientation that is within 10°

of perpendicular of the cylindrical axes, the beam having a width so as to be coupled into both cylinders and partially reflected and partially refracted therein at respective cylindrical surfaces such that light is projected from the diffuser as a widely distributed fan of light, and wherein the beam source and dual cylinder diffuser element are mounted to a base adapted to rotate about an axis substantially coinciding with the incident beam, such that the distributed fan of light output from the diffuser element also rotates.