US2018283650A1PendingUtilityA1
Apparatus for controlling the re-distribution of light emitted from a light-emitting diode
Est. expiryJun 29, 2031(~5 yrs left)· nominal 20-yr term from priority
F21K 9/20G02B 5/0242G02B 5/0294F21V 29/70F21V 19/0055G02B 5/0278F21V 3/02F21V 29/89F21Y 2115/10H05K 999/99F21V 3/049F21V 5/00
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Claims
Abstract
A system for re-distributing light emitted from a light source using an optical element is described. The optical element is manufactured using a bulk matrix material, and diffusing particles and/or scattering particles are embedded within the bulk material. The optical element is coupled to the light source to capture emitted light and redistribute the light in a desired angular distribution pattern depending on the ratio of total weight of diffusing particles to total weight of scattering particles.
Claims
exact text as granted — not AI-modified1 . A system, comprising:
a source configured to emit electromagnetic radiation having a first angular distribution pattern; an optical element coupled to the source, wherein the optical element is formed from a bulk material, and the bulk material is embedded with a first type of particle, and further wherein the optical element has a shape that captures the first angular distribution pattern and emits a second angular distribution pattern.
2 . The system of claim 1 , wherein the bulk material is further embedded with a second type of particle.
3 . The system of claim 2 , wherein the first type of particle is one or more type of scattering particles, and the second type of particle is one or more type of diffusing particles.
4 . The system of claim 1 , wherein the first angular distribution pattern does not emit radiation beyond a 180° arc in a plane passing through a center of and normal to the source, and further wherein the second angular distribution pattern emits radiation over at least a 180° arc in the plane passing through the center of and normal to the source.
5 . The system of claim 1 , wherein the optical element is remote from the source.
6 . The system of claim 1 , wherein the optical element has a size and a shape substantially similar to a rounded portion of an A19 incandescent light bulb.
7 . A system, comprising:
a light-emitting element; an optical element coupled to the light emitting element, wherein the optical element is formed from a bulk material, the bulk material is embedded with a first type of particle, and further wherein the optical element captures the light emitted by the light emitting element and re-emits the light in a quasi-isotropic distribution pattern.
8 . The system of claim 7 , wherein the bulk material is further embedded with a second type of particle.
9 . The system of claim 8 , wherein the first type of particle is a scattering particle, and the second type of particle is a diffusing particle.
10 . The system of claim 7 , wherein the optical element is coupled to the light emitting element with a material having a refractive index that substantially matches a refractive index of the bulk material.
11 . The system of claim 7 , wherein the optical element is spherical.
12 . The system of claim 11 , wherein a diameter of the spherical optical element is greater than a width of a base supporting the light emitting element.
13 . The system of claim 7 , wherein the light emitting element is a light emitting diode.
14 . The system of claim 7 , wherein the light emitting element is a laser.
15 . The system of claim 7 , wherein the quasi-isotropic distribution pattern has a light distribution uniformity between 0.6 and 1.4, and further wherein the light distribution uniformity is given by U=
U
=
∫
-
110
°
-
130
°
Id
θ
+
∫
110
°
130
°
Id
θ
2
∫
-
10
°
10
°
Id
θ
,
wherein I corresponds to emitted intensity in a given direction.
16 . A method of simulating a light emission distribution of an incandescent light bulb, comprising:
generating light with a light-emitting diode (LED), wherein the LED only emits light in a forward direction; capturing the generated light with an optical element, wherein the optical element is embedded with a first type of particle; re-emitting at least some of the captured light in a distribution pattern, wherein the distribution pattern includes emission in a backward direction.
17 . The method of claim 16 , wherein the optical element is further embedded with a second type of particle.
18 . The method of claim 17 , wherein the first type of particle is a scattering particle, and the second type of particle is a diffusing particle.
19 . (canceled)
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