CN109799618A - A kind of elliptical polarization Laser emission Optical devices - Google Patents
A kind of elliptical polarization Laser emission Optical devices Download PDFInfo
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- CN109799618A CN109799618A CN201910204266.0A CN201910204266A CN109799618A CN 109799618 A CN109799618 A CN 109799618A CN 201910204266 A CN201910204266 A CN 201910204266A CN 109799618 A CN109799618 A CN 109799618A
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Abstract
The present invention provides a kind of elliptical polarization Laser emission Optical devices, including laser；The light rear class that goes out of the laser has shaping lens, shaping lens rear class has non-polarizing beamsplitter that light is divided into two-way, it is wherein parallel with another way after principal reflection mirror reflects all the way, polarization spectroscope, bundling device, sagittal surface extender lens, conformal diaphragm are set gradually in two-way optical path from front to back and obtains two-way emergent light, reflexes to bundling device in the light all the way that polarization spectroscope side has front mirror and back mirror to separate polarization spectroscope；The quantity of the laser is distributed in a ring to be multiple.Beam splitting of the present invention and be polarized modulation and meanwhile carry out, improve utilization ratio of laser energy；The emergent light of single laser is divided into two-way elliptically polarized light, and absolute visual field angle can be increased to twice of conjunction beam mode.
Description
Technical field
The present invention relates to a kind of elliptical polarization Laser emission Optical devices.
Background technique
Laser proximity detection equipment is since appearance, since detection accuracy is high, small in size and anti-electromagnetic interference capability is strong,
It has been widely used in weaponry, but is interfered in system vulnerable to natural environments such as cloud and mist, flue dust.Due to entity mesh
Suspended particles in mark and air move back that polarization effect difference is larger to light, therefore can be mentioned by the Polarization Modulation information of laser
The anti-interference ability of high Laser proximity detection equipment.
As disclosed a kind of laser fuze based on Polarization Detection, laser hair in " laser fuze based on Polarization Detection "
Laser beam out, after the modulation of the horizontal polarizer, shoot laser becomes horizontal polarization laser.This mode is due to being used only level
Polarization laser, orthogonal polarized light are not used, and utilization ratio of laser energy is not high.
" application of the polarization characteristics of lasers in influence fuse " " to disclose laser in the 6th phase page 163,164 in 2010 inclined
Vibration modulate emission optical system, the laser beam that laser issues pass through respectively after beam splitter is divided into the identical two-beam of power
The orthogonal polarizer one in polarization direction and polarizer two become the linearly polarized light of two beam cross-polarizations, and two-beam passes through can
After optical attenuator one and adjustable optical attenuator two carry out amplitude modulation, elliptically polarized light is synthesized by bundling device, passes through optics
Antenna is launched, and wherein amplitude modulation is completed by ranging information module control encrypting module.This mode is first divided again to two
Modulation is polarized in beam light respectively, and horizontal polarization is polarized modulation loss vertical polarization energy, and vertical polarization is polarized modulation loss water
Flat resonance energy, utilization ratio of laser energy be not high.
As it can be seen that the laser polarization modulating device of the prior art, polarised light generates depolarization vibration effect when refraction, reflection occurs
It answers, angle is bigger, and influence is bigger, and the angle of visibility using the transmitting covering of monochromatic light road is limited.
Summary of the invention
In order to solve the above technical problems, the ellipse is inclined the present invention provides a kind of elliptical polarization Laser emission Optical devices
Vibration Laser emission Optical devices can be improved the polarization laser capacity usage ratio of transmitting, increase the visual field of single laser covering
Angle.
The present invention is achieved by the following technical programs.
A kind of elliptical polarization Laser emission Optical devices provided by the invention, including laser；The laser goes out light
Rear class has shaping lens, and shaping lens rear class has non-polarizing beamsplitter that light is divided into two-way, wherein reflecting all the way through principal reflection mirror
It is parallel with another way afterwards, polarization spectroscope is set gradually in two-way optical path from front to back, bundling device, sagittal surface extender lens, is total to
Shape diaphragm obtains two-way emergent light, has front mirror and back mirror to separate polarization spectroscope in polarization spectroscope side
Light reflexes to bundling device all the way；The quantity of the laser is distributed in a ring to be multiple.
The angle for two sagittal surface visual fields that the two-way emergent light is constituted is identical.
Meridian plane collector lens is provided between the bundling device and sagittal surface extender lens.
Two sagittal surface visual fields that the two-way emergent light is constituted abut into a sagittal surface field side by side.
The sum of angle of described two sagittal surface visual fields is greater than 45 °.
The multiple laser is annularly uniformly distributed.
The quantity of the laser is eight.
The shaping lens are made of the fast axle shaping lens of the slow axis shaping lens of prime and rear class.
It the beneficial effects of the present invention are: beam splitting and is polarized modulation while carrying out, improve utilization ratio of laser energy；Individually
The emergent light of laser is divided into two-way elliptically polarized light, and absolute visual field angle can be increased to twice of conjunction beam mode.
Detailed description of the invention
Fig. 1 is principle of compositionality figure of the invention；
Fig. 2 is mounting structure schematic diagram of the invention.
In figure: 1- laser, 2- slow axis shaping lens, 3- fast axle shaping lens, 4- non-polarizing beamsplitter, 5- polarization spectro
Mirror, 6- front mirror, 7- back mirror, 8- bundling device, 9- meridian plane collector lens, 10- sagittal surface extender lens, 11- are conformal
Diaphragm, 12- principal reflection mirror, 21- parallel polarized light sagittal surface visual field, 22- orthogonal polarized light sagittal surface visual field.
Specific embodiment
Be described further below technical solution of the present invention, but claimed range be not limited to it is described.
A kind of elliptical polarization Laser emission Optical devices as shown in Figure 1 and Figure 2, including laser 1；The laser 1
Light rear class has shaping lens out, and shaping lens rear class has non-polarizing beamsplitter 4 that light is divided into two-way, wherein all the way through principal reflection mirror
It is parallel with another way after 12 reflections, polarization spectroscope 5, bundling device 8, sagittal surface are set gradually in two-way optical path from front to back and is expanded
Lens 10, conformal diaphragm 11 obtain two-way emergent light, have front mirror 6 and back mirror 7 will be inclined in 5 side of polarization spectroscope
The light all the way that vibration spectroscope 5 separates reflexes to bundling device 8；The quantity of the laser 1 is distributed in a ring to be multiple.
The angle for two sagittal surface visual fields that the two-way emergent light is constituted is identical.
Meridian plane collector lens 9 is provided between the bundling device 8 and sagittal surface extender lens 10.
Two sagittal surface visual fields that the two-way emergent light is constituted abut into a sagittal surface field side by side.
The sum of angle of described two sagittal surface visual fields is greater than 45 °.
The multiple laser 1 is annularly uniformly distributed.
The quantity of the laser 1 is eight.
The shaping lens are made of the fast axle shaping lens 3 of the slow axis shaping lens 2 of prime and rear class.
Generally speaking, the principle of the invention lies in being first split to the laser of laser output, it is equal to obtain energy
Two beam laser, then tune is split and is polarized simultaneously to the laser that laser exports using polarization spectroscope to every Shu Jiguang respectively
System further obtains two orthogonal beam laser of polarization direction, amounts to four Shu Jiguang, two beam orthogonal polarized lights are respectively through Brewster
Two secondary reflection of diaphragm, is incident on bundling device, and with two beam horizontal polarization photosynthesis, two beam elliptically polarized light, two-beam is respectively in son
Noon face carries out visual field compression, sagittal surface expands, by sagittal surface field stitching, finally obtaining the larger sagittal surface angle of divergence, most
Exterior space is emitted to by two-way window respectively afterwards.
In other words, the laser that laser 1 issues by beam splitting twice, is polarized modulation, closes after beam, sagittal surface expand, obtains
Two beam elliptically polarized lights, every beam elliptically polarized light are θ in the sagittal surface angle of divergence, and by field stitching, final acquisition sagittal surface is total
The angle of divergence is 2 θ.Specifically, the laser that the wavelength that laser 1 issues is λ, corrects lens 2 by slow axis and fast axle corrects lens 3
Shaping is carried out to laser beam, the laser after shaping passes through non-polarizing beamsplitter 4, is divided into the identical two-beam of power, a branch of folding
It is constant to penetrate rear direction, a branch of reflection simultaneously turns 90 ° of outgoing, and refraction light impinges perpendicularly on polarization spectroscope 5, and polarization spectroscope 5 will swash
Light is divided into the light of two beam outs of phase, and parallel polarized light refractive direction is constant, and orthogonal polarized light reflects and turn 90 ° of outgoing, wherein
The optional polarization splitting prism of polarization spectroscope 5 or polarization plate spectroscope, orthogonal polarized light through 6 turns of front mirror, 90 ° of outgoing, after
After 7 turns of 90 ° of outgoing of reflecting mirror, exit direction is orthogonal with parallel polarized light, closes beam using bundling device 8 in two-beam confluce, obtains
A branch of elliptically polarized light is obtained, elliptically polarized light compresses laser slow axis divergence by meridian plane collector lens 9, goes out meridian plane
It penetrates the light angle of divergence to be decreased within ± 2 °, laser fast axis divergence angle is expanded by sagittal surface extender lens 10, goes out sagittal surface
It penetrates the light angle of divergence and increases to ± 10 ° or more, final elliptically polarized light is emitted to exterior space by conformal diaphragm 11；Through non-inclined
The beam splitter 4 that shakes reflects and turns the laser beam of 90 ° of outgoing, and 90 ° of outgoing are reflected and turned through principal reflection mirror 12, impinge perpendicularly on polarization point
Laser is divided into the light of two beam outs of phase by light microscopic 5, polarization spectroscope 5, and parallel polarized light refractive direction is constant, orthogonal polarized light
It reflects and turns 90 ° of outgoing, wherein the optional polarization splitting prism of polarization spectroscope 5 or polarization plate spectroscope, orthogonal polarized light warp
After 7 turns of 6 turns of 90 ° of outgoing of front mirror, back mirror 90 ° of outgoing, exit direction is orthogonal with parallel polarized light, intersects in two-beam
Beam closes using bundling device 8 in place, obtains a branch of elliptically polarized light, elliptically polarized light is by meridian plane collector lens 9 to laser slow axis
Angle of divergence compression, is decreased to the meridian plane emergent light angle of divergence within ± 2 °, by sagittal surface extender lens 10 to laser fast axle
The angle of divergence expands, and so that the sagittal surface emergent light angle of divergence is increased to ± 10 ° or more, final elliptically polarized light passes through conformal diaphragm 11
It is emitted to exterior space, the axis of two conformal diaphragms 11 is in the same sagittal surface.
The present invention is divided into eight regions around central axes as a result, and a laser 1, each laser are placed in each region
Device 1 undertakes the Laser emission of the 2 θ sagittal surface angles of divergence, wherein 2 θ need to be slightly larger than 45 °, eight lasers 1 complete 360 ° of laser jointly
Transmitting, meet laser panorama detection device to Laser emission around 360 ° of covering non-blind areas of axis the needs of.
Claims (8)
1. a kind of elliptical polarization Laser emission Optical devices, including laser (1), it is characterised in that: the laser (1) goes out
Light rear class has shaping lens, and shaping lens rear class has non-polarizing beamsplitter (4) that light is divided into two-way, wherein all the way through principal reflection mirror
(12) parallel with another way after reflecting, polarization spectroscope (5), bundling device (8), the sagitta of arc are set gradually in two-way optical path from front to back
Face extender lens (10), conformal diaphragm (11) obtain two-way emergent light, have front mirror (6) in polarization spectroscope (5) side
The light all the way that polarization spectroscope (5) separates is reflexed into bundling device (8) with back mirror (7)；The quantity of the laser (1) is
It is multiple to be distributed in a ring.
2. elliptical polarization Laser emission Optical devices as described in claim 1, it is characterised in that: the two-way emergent light is constituted
Two sagittal surface visual fields angle it is identical.
3. elliptical polarization Laser emission Optical devices as described in claim 1, it is characterised in that: the bundling device (8) and arc
Meridian plane collector lens (9) are provided between sagittal plane extender lens (10).
4. elliptical polarization Laser emission Optical devices as described in claim 1, it is characterised in that: the two-way emergent light is constituted
Two sagittal surface visual fields abut into a sagittal surface field side by side.
5. elliptical polarization Laser emission Optical devices as claimed in claim 2, it is characterised in that: described two sagittal surface visual fields
The sum of angle be greater than 45 °.
6. elliptical polarization Laser emission Optical devices as described in claim 1, it is characterised in that: the multiple laser (1)
It is annular in shape uniformly distributed.
7. elliptical polarization Laser emission Optical devices as described in claim 1, it is characterised in that: the number of the laser (1)
Amount is eight.
8. elliptical polarization Laser emission Optical devices as described in claim 1, it is characterised in that: the shaping lens are by prime
Slow axis shaping lens (2) and rear class fast axle shaping lens (3) constitute.
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| CN201910204266.0A CN109799618B (en) | 2019-03-18 | 2019-03-18 | Elliptical polarization laser emission optical device |
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| CN201910204266.0A CN109799618B (en) | 2019-03-18 | 2019-03-18 | Elliptical polarization laser emission optical device |
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| CN109799618B CN109799618B (en) | 2021-03-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111014948A (en) * | 2019-11-29 | 2020-04-17 | 大族激光科技产业集团股份有限公司 | Double-focus laser processing system and method |
Citations (4)
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| EP1139146A2 (en) * | 2000-03-21 | 2001-10-04 | Lucent Technologies Inc. | Double-pass polarization diversified birefringent filter |
| CN101110649A (en) * | 2007-06-18 | 2008-01-23 | 西安理工大学 | Wireless laser communication PPM polarization modulation and demodulation method |
| CN101382665A (en) * | 2008-10-24 | 2009-03-11 | 中国科学院上海光学精密机械研究所 | Method for coaxial synthesis of coherent light beams |
| CN104849992A (en) * | 2015-05-07 | 2015-08-19 | 上海大学 | 4F concave reflecting mirror system-based holographic three-dimensional display angle of view expansion device |
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2019
- 2019-03-18 CN CN201910204266.0A patent/CN109799618B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1139146A2 (en) * | 2000-03-21 | 2001-10-04 | Lucent Technologies Inc. | Double-pass polarization diversified birefringent filter |
| CN101110649A (en) * | 2007-06-18 | 2008-01-23 | 西安理工大学 | Wireless laser communication PPM polarization modulation and demodulation method |
| CN101382665A (en) * | 2008-10-24 | 2009-03-11 | 中国科学院上海光学精密机械研究所 | Method for coaxial synthesis of coherent light beams |
| CN104849992A (en) * | 2015-05-07 | 2015-08-19 | 上海大学 | 4F concave reflecting mirror system-based holographic three-dimensional display angle of view expansion device |
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| 刘健等: "激光偏振特性在近炸引信中的应用", 《西南大学学报(自然科学版)》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111014948A (en) * | 2019-11-29 | 2020-04-17 | 大族激光科技产业集团股份有限公司 | Double-focus laser processing system and method |
| CN111014948B (en) * | 2019-11-29 | 2022-04-15 | 大族激光科技产业集团股份有限公司 | Double-focus laser processing system and method |
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