Two way omnidirectional lens

Patent metadata

Field	Value
Publication number	US-9797572-B2
Application number	US-201414524691-A
Country	US
Kind code	B2
Filing date	Oct 27, 2014
Priority date	Oct 27, 2014
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

An omnidirectional lens is disclosed of the type which captures light from virtually all angles of incidence, and also emits light in all directions. Embodiments are specifically disclosed as a two-way lens that receives light beams from all directions of the compass and directs those light beams to a photosensor. The same two-way lens acts in a “beacon mode” to produce light beams from one or more LEDs, and to emit such light beams (again) in all directions of the compass. The emitted light beams can also be used to signal various functions as visible signals to users on a jobsite.

First claim

What is claimed is:

1. An omnidirectional lens, comprising:
(a) a light-conductive first portion;
(b) a light-conductive second portion, wherein said first portion is mounted adjacent to said second portion;
(c) said first portion being substantially cylindrical in shape, having a first outer perimeter, said first portion having a first surface that faces toward and is proximal to said second portion, and said first portion having a second surface that faces away from and is distal to said second portion; and
(d) said second portion being generally cylindrical in shape at a second outer perimeter that is proximal to said first portion, said second portion having a generally conical third surface that is proximal to said first portion, and said second portion having a fourth surface that faces away from and is distal to said first portion, said fourth surface forming a protrusion extending to a distal end;
(e) wherein: said first outer perimeter exhibits a textured surface finish, wherein: said first surface exhibits a substantially smooth surface finish; said second surface exhibits a textured surface finish; and said third surface exhibits a substantially smooth surface finish; and said fourth surface exhibits a substantially smooth surface finish, wherein: at least a portion of light rays that are intercepted by said second outer perimeter are refracted by said second outer perimeter, then reflected by said third surface and re-directed toward the distal end of said protrusion, further comprising a photosensor that is positioned proximal to the distal end of said protrusion, and which receives said at least a portion of light rays.

2. An omnidirectional lens, comprising:
(a) at least one photosensor;
(b) at least one light-emitting light source;
(c) a light-conductive material that passes light beams at predetermined light wavelengths; wherein:
(i) said light-conductive material has first surfaces that receive first light beams from at least one external source, in which said first surfaces are shaped to re-direct at least a portion of said first light beams to said at least one photosensor that is positioned proximal to said light-conductive material, such that said omnidirectional lens is able to receive light beams from virtually any direction with regard to the points of the compass and redirect at least a portion of said first light beams to said at least one photosensor;
(ii) said light-conductive material has second surfaces that receive second light beams emitted by said at least one light-emitting light source that is positioned proximal to said light-conductive material; and
(iii) said light-conductive material has third surfaces, said light-conductive material being shaped to re-direct at least a portion of said second light beams toward said third surfaces, said third surfaces having a textured surface finish to scatter light into a plurality of directions with respect to a direction of travel of said second light beams.

3. The omnidirectional lens of claim 2 , wherein: said first light beams comprise laser light, and said second light beams comprise visible light.

4. The omnidirectional lens of claim 2 , wherein said at least one photosensor comprises a photodiode, and said at least one light-emitting light source comprises a light-emitting diode.

5. The omnidirectional lens of claim 2 , wherein:
(a) said first surfaces include: (i) a truncated conical reflective surface, and (ii) a protrusion that extends toward said at least one photosensor;
(b) said truncated conical reflective surface re-directs at least a portion of said first light beams toward said protrusion; and
(c) at least a portion of said protrusion has reflective surfaces that tend to channel said first light beams toward said at least one photosensor.

6. The omnidirectional lens of claim 2 , wherein:
(a) said second surfaces include at least two different sloped surfaces that form a space proximal to said at least one light-emitting light source, wherein said second surfaces receive, refract, and re-direct at least a portion of said second light beams toward said third surfaces; and
(b) said third surfaces include: (i) an outer perimeter surface that exhibits a textured surface finish, and (ii) at least one reflective surface that scatters said second light beams internally toward said outer perimeter surface, where said second light beams are emitted to an exterior environment.

7. An omnidirectional lens, comprising:
(a) at least one photosensor;
(b) at least one light-emitting light source;
(c) a substantially light-conductive material that passes light beams at predetermined light wavelengths, said light conducting material having:
(i) a first surface portion for receiving externally-produced first light beams;
(ii) a second surface portion that is positioned proximal to said at least one photosensor;
(iii) a third surface portion that is positioned proximal to said at least one light-emitting light source;
(iv) a fourth surface portion for emitting light beams, said fourth surface portion having a textured surface finish; and
(v) a fifth portion that is shaped to direct at least a portion of said received first light beams from said first surface portion toward said second surface portion;

(d) a first circuit pathway for sending signals from said at least one photosensor to an external device signal receiver; and
(e) a second circuit pathway for receiving signals from an external signal transmitter to said at least one light-emitting light source;
(f) wherein:
(i) said first surface portion is shaped to receive said first light beams from substantially every direction in a substantially horizontal plane;
(ii) said third surface portion is shaped to receive second light beams from said at least one light-emitting light source, and to direct at least a portion of said second light beams toward said fifth portion;
(iii) said fifth portion is also shaped to receive said at least a portion of said second light beams from said third surface portion, which comprise third light beams, and to direct at least a portion of said third light beams toward said fourth surface portion;
(iv) said fourth surface portion is shaped to receive said at least a portion of said third light beams, which comprise fourth light beams, and to emit at least a portion of said fourth light beams at a plurality of directions that includes substantially every direction in said substantially horizontal plane.

8. The omnidirectional lens of claim 7 , wherein said first light beams comprise laser light, and said second light beams comprise visible light.

9. The omnidirectional lens of claim 7 , wherein said at least one photosensor comprises a photodiode, and said at least one light-emitting light source comprises a light-emitting diode.

10. The omnidirectional lens of claim 2 , wherein: said ability to receive light beams from virtually any direction comprises 360 degrees around a perimeter of said light-conductive material.

Assignees

• Trimble Navigation Ltd

Inventors

• Hayes James N
• Snyder Chris W

Classifications

• F21V7/0091 Primary

  using total internal reflection · CPC title

• G02B19/0085

  for use with both a detector and a source (, e.g. in a transceiver, G02B19/009, G02B19/0095 take precedence) · CPC title

• G02B19/0061

  the light source comprising a LED · CPC title

• G01C15/002

  Active optical surveying means (optical plumbing G01C15/105) · CPC title

• F21W2111/00

  Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00 · CPC title