Light source for a sorting apparatus

• US 10,113,734 B2
• Filed: 09/09/2015
• Issued: 10/30/2018
• Est. Priority Date: 06/27/2014
• Status: Active Grant

• Current Assignee: Key Technology, Inc. (Duravant LLC)
• Original Assignee: Key Technology, Inc. (Duravant LLC)
• Inventors: Richert, Gerald Ray, Wilson, Danielle, Justice, Timothy
• Primary Examiner(s): Coughlin, Andrew
• Application Number:
  US14/849,301
• Publication Number:
  US 20150377427A1
• Time in Patent Office: 1,147 Days
• CPC Class Codes: B07C 5/342 according to optical properties, e.g. colour according to radiation transmittivity B07C5/3416
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21S 4/28 rigid, e.g. LED bars
• CPC Class Codes: F21V 21/005 for several lighting devices in an end-to-end arrangement, i.e. light tracks
• CPC Class Codes: F21V 29/56 using liquid coolants F21V29/51 takes precedence
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A light source for a sorting apparatus is described and which includes an illuminator having a multiplicity of modules which are electrically coupled together, and which further include a plurality of light emitting diodes which can be selectively energized, by a computer network so as to parametrically control a temporal, spatial, and spectral energizing of the respective modules; and a light diffuser member is located in spaced relation relative to the illuminator, and which passes and substantially renders a visibly luminous or invisible emission substantially uniform.

Claims

1. A light source for a sorting apparatus, comprising:

an illuminator having a multiplicity of modules which are operably coupled together and which further mount a plurality of light emitting diodes (LEDs) in a predetermined spatial pattern, and wherein the respective modules of the illuminator have control electronics which are operably coupled with, and respond to a command sent by a computer network, and wherein the computer network, acting in combination with the control electronics, parametrically controls a temporal, spatial and spectral energizing and de-energizing of the respective modules, and individual LEDs so as to emit a luminous emission having predetermined characteristics;

a light diffuser member located in spaced relation relative the illuminator and which passes and substantially renders the luminous emission substantially uniform;

and wherein the respective multiplicity of modules are operably coupled together to form a linear LED illuminator, and wherein the linear LED illuminator has integrated optics which are individually, and operably associated with at least some of the respective LEDs;

an optical projection lens which receives the luminous emission of the energized linear LED illuminator, and forms a discrete luminous beam, and wherein the light diffuser member is located between the linear LED illuminator, and the optical projection lens;

a cooling assembly which is oriented in heat dissipating relation relative to the energized linear LED illuminator, and wherein the cooling assembly, and the linear LED illuminator are dimensioned to be received within an internal cavity of an enclosure, and which is at least partially translucent, and which further passes the discrete luminous beam, and wherein the internal cavity of the enclosure has a cross-sectional dimension of at least about 3.75 inches;

and wherein the respective LEDs forming the linear LED illuminator comprise LEDs which, when energized, emit multiple wavelengths of electromagnetic radiation which may be visible or invisible;

and wherein the linear, LED illuminator can be selectively controlled by the computer network to selectively energize and de-energize the respective LEDs forming the linear LED illuminator in a predetermined manner so as to provide control over an emission time, and a duration of the energizing of the respective LEDs; and

/or a selected luminous emission for the respective LEDs; and

/or a substantially simultaneous pulsed illumination of predetermined LEDs; and

/or a coordinated, sequential energizing of selected LEDs so as to provide a sequential, predetermined, and discrete luminous beam for the linear LED illuminator;

and wherein the linear LED illuminator, when energized, generates a predetermined, uniform illumination which has a working distance of less than about 1.5 meters;

and wherein the linear LED illuminator has a predetermined length dimension, and wherein the linear LED illuminator, when energized, produces a discrete luminous beam which has a major projection axis and which further has a length dimension of about 1 to about 1.5 times the length dimension of the linear LED illuminator;

and wherein the discrete luminous beam which is generated by the energized linear LED illuminator has a beam width which, when measured along the minor projection axis, is less than about 100 mm; and

wherein the discrete luminous beam has a peak luminous intensity, when measured along the major projection axis, and wherein a non-uniform light output of the energized linear LED illuminator is less than about 20% of the peak luminous intensity of the discrete luminous beam when measured along the major projection axis.

2. A light source for a sorting apparatus as claimed in claim 1, and wherein the discrete luminous beam has a peak luminous intensity when measure along the minor projection axis, and wherein a non-uniform light output of the energized linear LED illuminator is less than about 30% of the peak luminous intensity of the discrete luminous beam when measured along the minor projection axis.

3. A light source for a sorting apparatus as claimed in claim 2, and wherein the discrete luminous beam has a beam width, and further has a light output, when measured in a region outside of the width of the luminous beam, and which is less than about 10% of the peak of luminous intensity of the discrete luminous beam.

4. A light source for a sorting apparatus as claimed in claim 1, and wherein the light diffuser member comprises a synthetic, translucent substrate which has a top surface having a random surface topography, and which changes a direction of travel of the electromagnetic radiation which is emitted and passes therethrough, so as to provide a uniform discrete luminous beam.

5. A light source for a sorting apparatus, comprising:

a linear, Light Emitting Diode (LED) illuminator having a multiplicity of individual LED'"'"'s which are oriented in a predetermined spatial pattern, and wherein the LED illuminator is fabricated of multiple modules, and further has integrated optics and control electronics which allow the respective LED'"'"'s to be selectively energized and de-energized; and

wherein the linear, LED illuminator can be selectively controlled by a computer network to selectively energize and de-energize the respective LEDs forming the LED illuminator in a predetermined manner so as to provide control over an emission time and a duration of the energizing of the respective LEDs; and

/or a selected luminous emission for the respective LEDs; and

/or a substantially simultaneous pulsed illumination of predetermined LEDs; and

/or a coordinated, sequential energizing of selected LEDs so as to provide a sequential, predetermined, luminous emission for the linear LED illuminator;

a light diffuser member located in spaced relation relative to the linear, LED illuminator, and which receives and passes the luminous output of the energized linear LED illuminator, and which further causes the luminous output of the linear, LED illuminator to become substantially uniform;

and wherein the respective LEDs forming the linear LED illuminator comprise LEDs which, when energized, emit multiple wavelengths of electromagnetic radiation which may be visible or invisible;

and wherein the linear LED illuminator is formed of multiple modules which matingly and operably cooperate with each other;

and wherein the multiple LEDs are fabricated in a chip on-board construction, and wherein the respective multiple modules are operably coupled with each other;

and wherein the linear LED illuminator has a predetermined length dimension, and wherein the linear LED illuminator, when energized, produces a luminous output characterized by a discrete, luminous beam, and wherein the discrete luminous beam has a major projection axis which has a length dimension of about 1 to about 1.5 times the length dimension of the linear LED illuminator;

and wherein the discrete luminous beam has a minor projection axis, and wherein the discrete luminous beam which is generated by the energized linear LED illuminator has a beam width, and which, when measured along the minor projection axis, is less than about 100 mm; and

wherein the discrete luminous beam has a peak luminous intensity, when measured along the major projection axis, and wherein a non-uniform light output of the energized linear LED illuminator is less than about 20% of the peak luminous intensity of the discrete luminous beam when measured along the major projection axis.

6. A light source for a sorting apparatus as claimed in claim 5, and wherein the discrete luminous beam has a peak luminous intensity when measure along the minor projection axis, and wherein a non-uniform light output of the energized linear LED illuminator is less than about 30% of the peak luminous intensity of the discrete luminous beam when measured along the minor projection axis.

7. A light source for a sorting apparatus as claimed in claim 6, and wherein the discrete luminous beam has a beam width, and further has a light output, when measured in a region outside of the width of the luminous beam, and which is less than about 10% of the peak of luminous intensity of the discrete luminous beam.

8. A light source for a sorting apparatus as claimed in claim 7, and wherein the linear LED illuminator has a predetermined width dimensioned which permits the linear LED illuminator to be received within an internal cavity of a translucent enclosure, and wherein the translucent enclosure has a cross-sectional dimension of less than about 3.75 inches.

9. A light source for a sorting apparatus as claimed in claim 8, and further comprising a cooling assembly which is mounted within the internal cavity of the translucent enclosure and is further oriented in heat dissipating relation relative to the energized linear LED illuminator.

10. A light source for a sorting apparatus as claimed in claim 9, and further comprising an optical projection lens which receives the luminous output of the energized linear LED illuminator, and forms the discrete luminous beam, and wherein the light diffuser member is located between the linear LED illuminator and the optical projection lens.

11. A light source for a sorting apparatus as claimed in claim 10, and wherein the light diffuser member comprises a synthetic, translucent substrate, and which further has a random surface topography which changes the direction of the emitted electromagnetic radiation passing there through so as to produce the resulting, uniformly discrete luminous beam.