AU2019229371B2 - A method and apparatus for a laser beam diffuser - Google Patents

A method and apparatus for a laser beam diffuser Download PDF

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Publication number
AU2019229371B2
AU2019229371B2 AU2019229371A AU2019229371A AU2019229371B2 AU 2019229371 B2 AU2019229371 B2 AU 2019229371B2 AU 2019229371 A AU2019229371 A AU 2019229371A AU 2019229371 A AU2019229371 A AU 2019229371A AU 2019229371 B2 AU2019229371 B2 AU 2019229371B2
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Australia
Prior art keywords
laser beam
diffuser
horticulture
optical
light
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AU2019229371A
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AU2019229371A1 (en
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James Redpath
Richard Redpath
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
    • A01G9/249—Lighting means
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/0808—Mirrors having a single reflecting layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/25—Greenhouse technology, e.g. cooling systems therefor

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

The apparatus is designed to maximize the laser beam diffusion for the harsh environment of horticulture through a light optimization design. The light optimization design is an optical flat back which has a center area sized to the laser beam diameter 5 transmission width with an optical diffusion surface surrounded with a mirror surface for an internal secondary mirror to the optical flat front. The center area optical diffusion surface back expands the laser beam transmission and the internal reflections are reflected by the secondary mirror surface through the front of the apparatus. The invention is designed to have the front surface of the apparatus exposed to the harsh 10 environment of horticulture. LO. 0 L 00

Description

LO. L
Editorial Note
2019229371
non-sequential page numbering of Description. Cover page should be page 1 and page 1 should be 1A
AUSTRALIA Patents Act 1990
COMPLETE SPECIFICATION STANDARD PATENT A METHOD AND APPARATUS FOR A LASER BEAM DIFFUSER
The following statement is a full description of this invention, including the best method of performing it known to me:
TITLE OF INVENTION A METHOD AND APPARATUS FOR A LASER BEAM DIFFUSER TECHNICAL FIELD
The present invention relates generally to a laser beam through an optical diffuser that spreads out the beam, more particularly an apparatus that increases the amount of coherent light from a laser beam expanded for horticulture. A user of the present invention will be able to manufacture an apparatus which can be used in a harsh environment to spread out a laser beam for horticulture with the result of delivering more coherent light at the destination area.
BACKGROUND
Optical diffusers are used to evenly diffuse light in many applications. The diffusers cause light to spread evenly across a destination surface removing high intensity bright spots. Common diffuser types include prismatic glass integrating bars, ground glass, opal glass, holographic diffusers, and diffractive diffusers. Prismatic glass integrating bars are expensive and occupy a great deal of precious space. Ground and opal glass scatter light equally in all directions but with a low degree of control. Holographic diffusers are an improvement on these technologies and enable limited production of light distribution patterns. In general, all of these optical diffusers suffer from internal reflections of the light transmission that are not used to produce more destination light. Furthermore, some of these diffusers require facing out toward the environment and require protection.
In general, commercially available methods of spreading a laser beam for illumination using optical diffusers result in a significant amount of coherent light lost. Some of these diffusers cannot be used for the harsh environment of horticulture without protection lending to further loss of coherent light.
Therefore, the object of the present invention is to capture the internal reflections of light and minimize the use of the diffuser surface to the size of the laser beam as to utilize a second surface mirror to reflect out light that otherwise would be the lost light to increase the efficiency of the diffuser. The present invention is to provide an optical flat with a diffuser surface that is small enough for a laser beam or collimated laser beam to impact completely with the outer surface of the optical flat having an internal second surface mirror for internal reflections from the transmission of the laser beam through the diffuser surface to produce more light at the destination for the beam diffusion. The invention is designed to have the optical surface front out to enable its use in the harsh environment of horticulture. In addition, the diffuser surface is limited to the transmission area of the laser beam as not to impact the internal reflections to be reflected out by the second surface mirror.
SUMMARY
The present invention addresses the expansion of laser light while preserving coherence for energy efficiency. Further, the present invention provides utility in design for use in hash environments for horticulture.
BRIEF DESCRIPTION OF THE DRAWINGS
The laser beam diffuser apparatus provides maximum spatial coherent light in the harsh environment of horticulture according to the invention will further be explained with reference to the drawings, wherein,
Figure 1 is a schematic view of the present invention with laser beam striking the diffuser element area.
Figure 2 is a side cross view drawing of the present invention with laser beam striking the diffuser element area.
DESCRIPTION OF EMBODIMENTS
All illustrations of the drawings are for the purpose of describing selected versions of the present invention and are not intended to limit the scope of the present invention.
In reference to Figure 1 at 100 is the invention back side. At 105 is an optical flat such as quartz or borosilicate glass. At 110 is a mirror coating to produce a second surface mirror at 130 the front side of the invention. At 120 is a diffuser surface such as frosted glass or a master microlens array for diffusion of a laser beam of the back side of the invention. At 150 is a laser beam that is sized in width for transmission through the diffuser surface at 120 via the back side of the invention. The invention is to have the front surface at 130 to face out to the harsh horticulture environment thereby not effecting the mirror coating at 110 and the diffusion surface at 120 on the back side of the invention.
In reference to Figure 2 at 200 is a side cross view of the invention. At 205 is an optical flat such as quartz or borosilicate glass. At 210 and 211 the back side of the invention shown is a mirror coating to produce a second surface mirror at 230 the front side of the invention. At 220 is a diffuser surface such as frosted glass or a master microlens array for diffusion of a laser beam of the back side of the invention. At 250 is a laser beam that is sized in width for transmission through the diffuser surface at 220 via the back side of the invention. The invention is to have the front surface at 230 to face out to the harsh horticulture environment thereby not effecting the mirror coating at 210 and 211 and the diffusion surface at 220 on the back side of the cross sectional view of the invention.
Although the invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.
THAT WHICH IS CLAIMED:
1. A method and apparatus for a laser beam diffuser for horticulture comprising: a coherent light source; a polished optical flat with a centered diffuser on a back surface area of the polished optical flat to accommodate the width of the coherent light source transmission beam width; the polished optical flat having a completely covered mirrored coating surface outward from the centered diffuser surface on the back surface area of the polished optical flat.
1/
2/
AU2019229371A 2019-09-11 2019-09-11 A method and apparatus for a laser beam diffuser Active AU2019229371B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2019229371A AU2019229371B2 (en) 2019-09-11 2019-09-11 A method and apparatus for a laser beam diffuser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU2019229371A AU2019229371B2 (en) 2019-09-11 2019-09-11 A method and apparatus for a laser beam diffuser

Publications (2)

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AU2019229371A1 AU2019229371A1 (en) 2021-03-25
AU2019229371B2 true AU2019229371B2 (en) 2022-12-08

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110013145A1 (en) * 2008-03-28 2011-01-20 Atsushi Kato Lighting apparatus and projector
US20110199686A1 (en) * 2008-10-23 2011-08-18 Nippon Kayaku Kabushiki Kaisha Light Diffusion Cell For Laser Light, Light Source Device And Image Display Device Using Same
CN104141923A (en) * 2013-05-09 2014-11-12 陶晓培 Converter for converting laser device into lighting device
US9683730B1 (en) * 2016-02-08 2017-06-20 Parhelion Incorporated System and method of optimizing white light

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110013145A1 (en) * 2008-03-28 2011-01-20 Atsushi Kato Lighting apparatus and projector
US20110199686A1 (en) * 2008-10-23 2011-08-18 Nippon Kayaku Kabushiki Kaisha Light Diffusion Cell For Laser Light, Light Source Device And Image Display Device Using Same
CN104141923A (en) * 2013-05-09 2014-11-12 陶晓培 Converter for converting laser device into lighting device
US9683730B1 (en) * 2016-02-08 2017-06-20 Parhelion Incorporated System and method of optimizing white light

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