# US 9,752,769 B2 · LED luminaire tertiary optic system

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- Number: US 9,752,769 B2
- Document ID: US9752769B2
- Status: Granted
- Kind: B2
- Application number: 13/310,983
- Filed: 2011-12-05
- Published: 2012-07-12
- Granted: 2017-09-05
- Earliest claimed: 2011-01-12
- Assignees: Kenall Manufacturing Company
- Applicants: Brandon Stolte; Kevin Dahlen; James Hawkins
- Inventors: Brandon Stolte; Kevin Dahlen; James Hawkins
- Web page: https://patentgrep.com/patent/US9752769B2

## CPC

- F21V 29/777: {the planes containing the fins or blades having directions perpendicular to the light emitting axis}
- F21K 9/20: Light sources comprising attachment means
- F21S 8/04: intended only for mounting on a ceiling or the like overhead structures (F21S8/02 takes precedence; {details of ceiling bases F21V21/03})
- F21V 3/02: characterised by the shape
- F21V 3/062: {the material being plastics}
- F21V 3/0625: {the material diffusing light, e.g. translucent plastics}
- F21V 13/00: Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00 (controlling the distribution of the light emitted by adjustment of elements F21V14/00)
- F21V 29/504: of refractors
- F21V 29/74: with fins or blades
- F21V 29/83: the elements having apertures, ducts or channels, e.g. heat radiation holes
- F21Y 2105/10: comprising a two-dimensional [2D] array of point-like light-generating elements
- F21Y 2115/10: Light-emitting diodes [LED]
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21K: NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED

## Abstract

A lens system for LED based light fixtures having a substantially coplanar array of LED's with a requirement for a wide angle of illumination. And in particular, light fixtures comprising LED lights used in low bay applications.

## Claims

### Claim 1

A light fixture having reduced glare from a light emitting diode (LED) array comprising:
(i) a generally coplanar LED array having a plurality of LEDs each LED generating a quantum of light;
(ii) a primary optic configuration receiving each quantum of light and creating a plurality of main beams of light, each main beam of light disposed at a high incidence angle relative to the LED substrate;
(iii) a refractive secondary optic configuration disposed adjacent to the primary optic configuration and receiving the plurality of main beams of light from the primary optic configuration;
(iv) a tertiary optic configuration being angularly disposed from the primary optic configuration and not immediately adjacent to the LED array and situated to receive and disperse the main beam from each LED;
(v) a treatment applied to the tertiary optic configuration, the treatment dispersing the main beam from each LED into a distributed plurality of rays collectively having a substantially batwing distribution with a type V wide square distribution to create a larger, more homogenous luminary element with lower glare than the main beams.

### Claim 2 (depends on 1)

The fixture in accordance with claim 1 wherein the angle of incidence is between 50 and 90 degrees.

### Claim 3 (depends on 1)

The fixture in accordance with claim 1 wherein the distance between the LED array and the tertiary optic is greater than 2½ inches.

### Claim 4 (depends on 1)

The fixture in accordance with claim 1 wherein the mechanism for light dispersion comprises at least one of diffusion and deflection.

### Claim 5 (depends on 1)

The fixture in accordance with claim 1 wherein the light fixture comprises a circular shape.

### Claim 6 (depends on 5)

The fixture in accordance with claim 5 wherein the inclined cover is substantially hemispherical in shape.

### Claim 7 (depends on 1)

The fixture in accordance with claim 1, wherein the treatment comprises a texturing on the tertiary optic configuration.

### Claim 8 (depends on 1)

The fixture in accordance with claim 1, wherein the treatment comprises a multiplicity of nano-elements on the tertiary optic configuration.

### Claim 9 (depends on 1)

The fixture in accordance with claim 1, wherein the secondary optic configuration comprises at least one lens.

### Claim 10 (depends on 1)

The fixture in accordance with claim 1, wherein the secondary optic configuration comprises a plurality of optics arranged in a planar configuration.

### Claim 11

A method of reducing glare from a lighting fixture having an array of LEDs, the method comprising:
(i) generating a quantum of light from each of a plurality of LEDs in an LED array carried by a substantially coplanar LED substrate;
(ii) focusing each quantum of light into a main beam of light through a primary optic configuration such that each main beam of light is disposed at a high incidence angle relative to the LED substrate;
(iii) focusing each main beam of light through a refractive secondary optic configuration disposed adjacent to the primary optic configuration;
(iv) receiving each main beam of light with a tertiary optic configuration that is angularly disposed from the primary optic and is not immediately adjacent to the LED array;
(v) dispersing each main beam of light through the tertiary optic configuration and into a distributed plurality of rays with a treatment applied to the tertiary optic configuration, the plurality of rays collectively having a substantially batwing distribution with a type V wide square distribution, thereby creating a larger, more homogenous luminary element with lower glare than the main beams.

### Claim 12 (depends on 11)

The method of claim 11, wherein dispersing each main beam of light through the tertiary optic configuration comprises dispersing each main beam of light with a texturing on the tertiary optic configuration.

### Claim 13 (depends on 11)

The method of claim 11, wherein dispersing each main beam of light through the tertiary optic configuration comprises dispersing each main beam of light with a multiplicity of nano-treatments on the tertiary optic configuration.

### Claim 14 (depends on 11)

The method of claim 11, wherein the tertiary optic configuration causes a dispersion of light from each of the main beams.

### Claim 15 (depends on 11)

The method of claim 11, wherein the batwing distribution pattern comprises at least 70% of light being directed to a zone between 50° and 70° as measured from the fixture nadir.

### Claim 16 (depends on 15)

The method of claim 15, wherein the batwing distribution pattern comprises no more than 20% of the light being directed to a zone below 40° as measured from the fixture nadir.

### Claim 17 (depends on 11)

The method of claim 11, wherein the batwing distribution pattern comprises no more than 5% of the light being directed to a zone above 70° as measured from the fixture nadir.

### Claim 18 (depends on 11)

The method of claim 11, wherein a distance between the LED array and the tertiary optic configuration is greater than 2½ inches.

### Claim 19 (depends on 11)

The method of claim 11, wherein the tertiary optic configuration comprises an inclined cover which is substantially hemispherical.

### Claim 20 (depends on 19)

The method of claim 19, wherein the inclined cover further comprises at least one of an apex or a discontinuity.