CN107807465B - Parallel surface light source and manufacturing method thereof - Google Patents
Parallel surface light source and manufacturing method thereof Download PDFInfo
- Publication number
- CN107807465B CN107807465B CN201711296790.2A CN201711296790A CN107807465B CN 107807465 B CN107807465 B CN 107807465B CN 201711296790 A CN201711296790 A CN 201711296790A CN 107807465 B CN107807465 B CN 107807465B
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- light source
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- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 72
- 238000000034 method Methods 0.000 claims description 7
- 230000005693 optoelectronics Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a parallel area light source, which comprises a common area light source, wherein a normally black twisted type phase-array liquid crystal plate is arranged on one side surface of the common area light source, transparent electrodes are arranged on two side surfaces of the twisted type phase-array liquid crystal plate, a lens array plate is arranged on the other side of the twisted type phase-array liquid crystal plate, after the transparent electrodes are connected with an external driving voltage, the transparent electrodes transmit light on a designated area of the twisted type phase-array liquid crystal plate to form a point light source array, the point light source array passes through the lens array plate, and a plurality of point light sources are collimated by the lens array plate to form parallel light with a divergence angle smaller than 1 degree. The invention adopts the twisted phase array liquid crystal plate and the micro-lens array plate which can reduce the emergent angle, the initial emergent angle of the surface light source is firstly reduced by the twisted phase array liquid crystal plate and then is emitted, and the reduced point light source array is collimated by the lens of the micro-lens array plate and then becomes parallel light with the divergence angle smaller than 1 degree.
Description
Technical Field
The invention relates to a parallel surface light source, in particular to a parallel surface light source with small divergence angle and large caliber.
Background
The divergence angle of the light source in the existing parallel light source is too large, so that the light source is not suitable for a bottom light source for shape detection and measurement; the large divergence angle of the bottom light source easily causes edge blurring, thereby causing measurement errors.
The traditional light source collimation method comprises lens collimation, reflecting cup collimation, lens combination and the like, and can only collimate light rays with large angles for the reflecting cup collimation, and the depth of the reflecting cup for the light rays with small angles is required to be deeper, so that the volume is larger; the combination of lenses increases the cost and bulk of the lens, and increases the absorption of light by the material. The prism film is added on the surface light source to achieve the collimation effect, and the surface light source manufactured by the method has the advantages of thin thickness and good uniformity, but the divergence angle is too large, and the requirement of a measuring instrument on the bottom light source cannot be met.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a parallel surface light source which is used in the field of optical inspection.
In order to solve the defects in the prior art, the technical scheme provided by the invention is as follows: the utility model provides a parallel area light source, includes ordinary area light source, ordinary area light source one side is equipped with the twist type looks that is normally black and is listed as the liquid crystal plate, the both sides face that twist type looks was listed as the liquid crystal plate all is equipped with transparent electrode, the opposite side that twist type looks was listed as the liquid crystal plate is equipped with lens array plate, transparent electrode switch-on after plus drive voltage, on the appointed region of twist type looks is listed as the liquid crystal plate light transmission, forms the pointolite array, pointolite array rethread lens array plate, a plurality of pointolite become the parallel light that diverges the angle and be less than 1 degree after passing through lens array plate lens collimation.
As an improvement of the parallel surface light source, the emergent angle of each point light source of the point light source array is smaller than 8 degrees.
As an improvement of the parallel surface light source of the present invention, the twisted type phase column liquid crystal panel has a plurality of designated areas from which the point light source array is emitted.
As an improvement of the parallel surface light source, the twisted phase column liquid crystal panel utilizes the electro-optical effect of liquid crystal, a transparent electrode is externally added on the twisted phase column liquid crystal panel, and a drive voltage is externally added to enable the designated area of the twisted phase column liquid crystal panel to transmit light, so that the original surface light source is changed into a point light source array.
The invention has the advantages that: the invention adopts twisted phase array liquid crystal and micro lens array, uses the electro-optic effect of liquid crystal to change the surface light source into point light source array, and then makes the point light source array into parallel light with divergence angle less than 1 degree after the point light source array is collimated by the lens of the micro lens array plate.
A method of parallel surface light source comprising the steps of:
s1: a common area light source and a microlens array plate are arranged, and a normally black and twisted type twisted phase array liquid crystal plate is arranged between the common area light source and the microlens array plate;
s2: manufacturing a normally black and twisted type phase-column liquid crystal panel, namely adding polarizing films on two sides of the liquid crystal panel to enable liquid crystal to be in an opaque state when no voltage exists, wherein the twisted type phase-column liquid crystal panel utilizes the electro-optic effect of the liquid crystal, and adds a transparent electrode on the twisted type phase-column liquid crystal panel and adds a driving voltage of 2V-3V to enable the designated area of the twisted type phase-column liquid crystal panel to transmit light;
s3: changing the emergent angle of the surface light source; a common area light source transmits light from a designated area of the twisted phase column liquid crystal panel, and the area light source is changed into a point light source array with an emergent angle smaller than 8 degrees;
s4: the point light source array passes through the micro lens array plate, each point light source of the point light source array is arranged on the focus of the lens array, and the point light source light rays become parallel light with the divergence angle smaller than 1 degree after being collimated by the lens.
Compared with the prior art, the invention has the advantages that: the thickness of the parallel surface light source manufactured by the method is thin; the uniformity is good. Simple and convenient manufacture and fewer steps.
Drawings
The invention and its advantageous technical effects are described in further detail below with reference to the attached drawings and to the detailed description, wherein:
FIG. 1 is a schematic diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a second embodiment of the present invention.
Fig. 3 is an emission effect diagram of the present invention.
Reference numeral name: 1. a common surface light source 2, a twisted phase liquid crystal panel 3, a transparent electrode 4, a lens array plate 5, a point light source array 6, a lens hole 7 and parallel light.
Detailed Description
The invention will be further described with reference to the drawings and specific examples, to which embodiments of the invention are not limited.
Embodiment one: as shown in fig. 1 and 3, a parallel area light source comprises a common area light source 1, wherein a normally black and twisted phase array liquid crystal plate 2 is arranged on one side surface of the common area light source 1, transparent electrodes 3 are arranged on two side surfaces of the twisted phase array liquid crystal plate 2, a lens array plate 4 is arranged on the other side of the twisted phase array liquid crystal plate 2, after the transparent electrodes 3 are connected with an external driving voltage, light is transmitted on a designated area of the twisted phase array liquid crystal plate 2 to form a point light source array 5, the point light source array 5 passes through the lens array plate 4 again, and a plurality of point light sources are collimated by lenses of the lens array plate 4 to form parallel light 7 with a divergence angle smaller than 1 degree. The twisted type phase column liquid crystal panel 2 is formed by applying a transparent electrode 3 to the twisted type phase column liquid crystal panel 2 by using the electro-optical effect of liquid crystal, and transmitting light to a specified region of the twisted type phase column liquid crystal panel 2 by applying a driving voltage, so that the original surface light source is changed into a point light source array 5 with a smaller emission angle. The lens holes 6 formed in the lens array plate 4 at intervals are circular.
Preferably, each point light source of the point light source array 5 has an exit angle of less than 8 degrees. Each point light source of the point light source array 5 corresponds to a lens of one lens array plate 4, and becomes parallel light 7 with a divergence angle smaller than 1 degree after collimation.
Embodiment two: as shown in fig. 2 and 3, a parallel area light source includes a normal area light source 1, a normal black twisted phase array liquid crystal panel 2 is disposed on one side of the normal area light source 1, transparent electrodes 3 are disposed on both sides of the twisted phase array liquid crystal panel 2, a lens array panel 4 is disposed on the other side of the twisted phase array liquid crystal panel 2, after the transparent electrodes 3 are connected with an applied driving voltage, light is transmitted on a designated area of the twisted phase array liquid crystal panel 2 to form a point light source array 5, the point light source array 5 passes through the lens array panel 4 again, and a plurality of point light sources become parallel light 7 with a divergence angle smaller than 1 degree after being collimated by lenses of the lens array panel 4. The twisted type phase column liquid crystal panel 2 is formed by applying a transparent electrode 3 to the twisted type phase column liquid crystal panel 2 by using the electro-optical effect of liquid crystal, and transmitting light to a specified region of the twisted type phase column liquid crystal panel 2 by applying a driving voltage, so that the original surface light source is changed into a point light source array 5 with a smaller emission angle. The lens holes 6 formed in the lens array plate 4 at intervals are square.
The invention adopts twisted phase array liquid crystal and micro lens array, uses the electro-optic effect of liquid crystal to change the surface light source into point light source array, and then makes the point light source array into parallel light with divergence angle less than 1 degree after the point light source array is collimated by the lens of the micro lens array plate.
A method of parallel surface light source comprising the steps of:
s1: a common area light source and a micro lens array plate are arranged, and a normally black twisted phase array liquid crystal plate for reducing the emergent angle of the area light source is arranged between the common area light source and the micro lens array plate;
s2: manufacturing a normally black and twisted type phase-column liquid crystal panel, namely adding polarizing films on two sides of the liquid crystal panel to enable liquid crystal to be in an opaque state when no voltage exists, wherein the twisted type phase-column liquid crystal panel utilizes the electro-optic effect of the liquid crystal, and adds a transparent electrode on the twisted type phase-column liquid crystal panel and adds a driving voltage of 2V-3V to enable the designated area of the twisted type phase-column liquid crystal panel to transmit light;
s3: changing the emergent angle of the surface light source; the area light source transmits light from a designated area of the twisted phase column liquid crystal panel, and the area light source is changed into a point light source array with an emergent angle smaller than 8 degrees;
s4: the point light source array passes through the micro lens array plate, each point light source of the point light source array is arranged on the focus of the lens array, and the point light source light rays become parallel light with the divergence angle smaller than 1 degree after being collimated by the lens.
Compared with the prior art, the invention has the advantages that: the thickness of the parallel surface light source manufactured by the method is thin; the uniformity is good. Simple and convenient manufacture and fewer steps.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations may be made therein without departing from the principles and structure of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The parallel surface light source comprises a common surface light source, and is characterized in that a normally black twisted type phase-array liquid crystal plate is arranged on one side surface of the common surface light source, transparent electrodes are arranged on two side surfaces of the twisted type phase-array liquid crystal plate, a lens array plate is arranged on the other side of the twisted type phase-array liquid crystal plate, the transparent electrodes are connected with an applied driving voltage and then transmit light on a designated area of the twisted type phase-array liquid crystal plate to form a point light source array, the point light source array passes through the lens array plate again, and a plurality of point light sources are collimated by the lens array plate to form parallel light with a divergence angle smaller than 1 degree;
the emitting angle of each point light source of the point light source array is smaller than 8 degrees;
the twisted phase column liquid crystal panel utilizes the electro-optical effect of liquid crystal, transparent electrodes are externally added on the twisted phase column liquid crystal panel, and the externally-added driving voltage enables the designated area of the twisted phase column liquid crystal panel to transmit light, so that the original common surface light source is changed into a point light source array.
2. The parallel planar light source according to claim 1, wherein the twisted type phase-aligned liquid crystal panel has a plurality of designated areas, and the array of point light sources is emitted from the designated areas at an angle of less than 8 degrees.
3. A method for manufacturing the parallel surface light source according to any one of claims 1 to 2, comprising the steps of:
s1: a common area light source and a microlens array plate are arranged, and a normally black and twisted type twisted phase array liquid crystal plate is arranged between the common area light source and the microlens array plate;
s2: manufacturing a normally black twisted type phase column liquid crystal panel, adding polarizing films on two sides of the liquid crystal panel to enable liquid crystal to be in an opaque state when no voltage exists, wherein the twisted type phase column liquid crystal panel utilizes the electro-optical effect of the liquid crystal, and externally adds a transparent electrode on the twisted type phase column liquid crystal panel, and externally adds a driving voltage of 2V-3V to enable the designated area of the twisted type phase column liquid crystal panel to transmit light;
s3: changing the emergent angle of the surface light source; the common surface light source transmits light from a designated area of the twisted phase column liquid crystal panel, and the common surface light source is changed into a point light source array with an emergent angle smaller than 8 degrees;
s4: the point light source array passes through the micro lens array plate, each point light source of the point light source array is arranged on the focus of the lens array, and the point light source light rays become parallel light with the divergence angle smaller than 1 degree after being collimated by the lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711296790.2A CN107807465B (en) | 2017-12-08 | 2017-12-08 | Parallel surface light source and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711296790.2A CN107807465B (en) | 2017-12-08 | 2017-12-08 | Parallel surface light source and manufacturing method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN107807465A CN107807465A (en) | 2018-03-16 |
| CN107807465B true CN107807465B (en) | 2024-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711296790.2A Active CN107807465B (en) | 2017-12-08 | 2017-12-08 | Parallel surface light source and manufacturing method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05108023A (en) * | 1991-10-14 | 1993-04-30 | Nippon Telegr & Teleph Corp <Ntt> | Visual field angle control type display device |
| TW200801397A (en) * | 2006-06-14 | 2008-01-01 | Young Optics Inc | Illumination system and projection apparatus |
| CN201130257Y (en) * | 2007-12-13 | 2008-10-08 | 绎立锐光科技开发(深圳)有限公司 | Lens array |
| CN101457900A (en) * | 2007-12-13 | 2009-06-17 | 绎立锐光科技开发(深圳)有限公司 | Low diverging LED light source module and lens array thereof |
| CN207780418U (en) * | 2017-12-08 | 2018-08-28 | 广东普密斯视觉技术有限公司 | A kind of parallel area source |
-
2017
- 2017-12-08 CN CN201711296790.2A patent/CN107807465B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05108023A (en) * | 1991-10-14 | 1993-04-30 | Nippon Telegr & Teleph Corp <Ntt> | Visual field angle control type display device |
| TW200801397A (en) * | 2006-06-14 | 2008-01-01 | Young Optics Inc | Illumination system and projection apparatus |
| CN201130257Y (en) * | 2007-12-13 | 2008-10-08 | 绎立锐光科技开发(深圳)有限公司 | Lens array |
| CN101457900A (en) * | 2007-12-13 | 2009-06-17 | 绎立锐光科技开发(深圳)有限公司 | Low diverging LED light source module and lens array thereof |
| CN207780418U (en) * | 2017-12-08 | 2018-08-28 | 广东普密斯视觉技术有限公司 | A kind of parallel area source |
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| Publication number | Publication date |
|---|---|
| CN107807465A (en) | 2018-03-16 |
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