CN105527715B - A kind of illumination angle of divergence adjustable optical using diffraction optical element in conjunction with lens - Google Patents
A kind of illumination angle of divergence adjustable optical using diffraction optical element in conjunction with lens Download PDFInfo
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- CN105527715B CN105527715B CN201510495360.8A CN201510495360A CN105527715B CN 105527715 B CN105527715 B CN 105527715B CN 201510495360 A CN201510495360 A CN 201510495360A CN 105527715 B CN105527715 B CN 105527715B
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- optical element
- diffraction optical
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- lens
- angle
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/0944—Diffractive optical elements, e.g. gratings, holograms
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0916—Adapting the beam shape of a semiconductor light source such as a laser diode or an LED, e.g. for efficiently coupling into optical fibers
Abstract
The present invention provides a kind of illumination angle of divergence adjustable optical using diffraction optical element in conjunction with lens, is related to technical field of optical.It includes radiation source and lens, diffraction optical element is equipped between radiation source and lens, diffraction optical element is adjusted at a distance from lens, and the spherical wave that radiation source issues forms distribution light field by diffraction optical element, and distribution light field passes through the lens forming illumination angle of divergence.The present invention solves in the prior art that structure is complicated, volume is big, manufacturing cost is high and technical problem inconvenient to use in angle of divergence adjustable systems.The invention has the benefit that light source is fixed with lens position, the adjusting that the angle of divergence of required light field only can be realized by adjusting the position of diffraction optical element.Optical system structure advantages of simple, small in size, manufacturing cost is low.The adjusting of angle of divergence light field is simple and convenient to operate.Optical system has wide range of applications.
Description
Technical field
The present invention relates to technical field of optical, more particularly, to a kind of illumination angle of divergence adjustable optical.
Background technique
As optoelectronic device, systematic difference develop, special-shaped laser light field of each photovoltaic field to the adjustable angle of divergence
Using more and more extensive, the requirement of abnormity laser light field adjustable to the angle of divergence is also continuously improved.Based on diffraction optics and
The development of laser technology, it is already possible to realize that the special-shaped laser light field of the fixed angle of divergence, such as rifle take aim at light field, annulus light field, net
The laser tools light field such as lattice light field.But if realizing the adjusting of the special-shaped light field angle of divergence, existing optical articles require to cooperate
Complicated zoom number telescopic system.Chinese patent Authorization Notice No. CN201749243U, authorized announcement date 2 months 2011 16
Day, the utility model of entitled " beam expander mirror with adjustable divergence angle " discloses a kind of adjustable beam lens device of the angle of divergence.It includes
There is incident mirror, the optical path position corresponding position of incident mirror is equipped with outgoing mirror, and small lens barrel is arranged with outside incident mirror, is arranged with outside outgoing mirror
Big lens barrel；It is arranged with small lens barrel in big lens barrel, transmitting spacing is equipped between incident mirror and outgoing mirror；Between small lens barrel and big lens barrel
Equipped with limit regulating member, limits and be connected with flexible adjustment component on regulating member；Adjusting sleeve, adjusting sleeve are arranged with outside big lens barrel
It is connect with limit regulating member.The structure its optical system structure is complicated, and volume is big, and manufacturing cost is high, by big lens barrel with it is small
Mutual adjusting between lens barrel can change the angle of divergence of laser, adjust complexity, inconvenient to use.
Summary of the invention
In order to solve the prior art, there are angle of divergence adjustable systems, structure is complicated, volume is big, manufacturing cost is high and adjusts
Complicated technical problem inconvenient to use, the present invention provide a kind of structure is simple, small in size, manufacturing cost is low, it is easy-operating can
Adjust angle of divergence light field system.
The technical scheme is that a kind of illumination angle of divergence using diffraction optical element in conjunction with lens is adjustable
Optical system, it includes radiation source and lens, and diffraction optical element, diffraction optical element are equipped between radiation source and lens
It is adjusted at a distance from lens, the spherical wave that radiation source issues forms distribution light field by diffraction optical element, is distributed light field
By lens forming illumination angle of divergence θ.It only needs to can be achieved with by the position for adjusting diffraction optical element in optical system
The accurate adjusting of the light field angle of divergence.Optical system structure advantages of simple, small in size, manufacturing cost is low；Angle of divergence light field adjusts letter
It is single, easy to operate；Optical system has wide range of applications.
Preferably, diffraction optical element is that directional light irradiates diffraction optical element, the design light field of diffraction optical element
The angle of divergence is θ 0, and the spherical wave that radiation source issues converges to convergent point A, convergent point A to lens by diffraction optical element
Distance is f, the distance of convergent point A to diffraction optical element be d, illumination angle of divergence θ and design light field angle of divergence θ 0 ratio (θ/
θ 0) it is amplification factor β, β=d/f.
Preferably, diffraction optical element can be fresnel diffraction optical element, it is also possible to Fraunhofer diffraction light
Learn element.
Preferably, radiation source can be laser light source, or LED light source.
Compared with prior art, the beneficial effects of the present invention are: radiation source is fixed with lens position, only spread out by adjusting
Penetrate optical element position can be realized required light field the angle of divergence adjusting.Optical system structure refining, mechanical control system
Simply, size micromation, manufacturing cost are cheap.The adjusting of angle of divergence light field is simple and convenient to operate, optical efficiency is high, optical system
It has wide range of applications.
Detailed description of the invention
Attached drawing 1 is connection schematic diagram of the present invention；
Attached drawing 2 is the connection schematic diagram of embodiment 1；
Attached drawing 3 is the connection schematic diagram of embodiment 2；
Attached drawing 4 is the connection schematic diagram of embodiment 3.
In figure: 1- radiation source；2- diffraction optical element；3- lens.
Specific embodiment
Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.
Embodiment 1:
As shown in Figure 1, a kind of illumination angle of divergence adjustable optical using diffraction optical element in conjunction with lens,
It includes radiation source 1 and lens 3.Radiation source 1 is laser light source or LED light source.Lens 3 are that one piece of positive lens or one piece are negative
Lens.The distance between radiation source 1 and lens 3 immobilize.Diffraction optical element is equipped between radiation source 1 and lens 3
2.Diffraction optical element 2 is that directional light irradiates diffraction optical element, and the design light field angle of divergence of diffraction optical element 2 is θ 0.It penetrates
Optical element 2 is fresnel diffraction optical element or Fraunhofer diffraction optical element.Diffraction optical element 2 and lens 3 away from
From adjustable.Diffraction optical element 2 can move between radiation source 1 and lens 3.The light that radiation source 1 issues is spherical surface
Wave forms distribution light field by diffraction optical element 2, and distribution light field forms illumination angle of divergence θ by lens 3.Radiation source 1 is sent out
Photosphere surface wave out converges to convergent point A by diffraction optical element 2, and the distance of convergent point A to lens 3 is f, and convergent point A is extremely
The distance of diffraction optical element 2 is d.Illumination angle of divergence θ and diffraction optical element 2 design ratio, that is, θ/θ 0 of light field angle of divergence θ 0
For amplification factor β.The distance d's of amplification factor β and convergent point A to 3 distance f of lens, convergent point A to diffraction optical element 2
Relationship is β=d/f.
As shown in Fig. 2, radiation source 1 is convergence form light source.Diffraction optical element 2 be fresnel diffraction optical element or
Fraunhofer diffraction optical element, the design light field angle of divergence are θ 01.Lens 3 are positive lens.The light beam of radiation source 1 converges
To convergent point A1.D1 is distance of the convergent point A1 to diffraction optical element 2.F1 is distance of the convergent point A1 to lens 3, and thoroughly
The focal length of mirror 3.Diffraction optical element 2 is placed between radiation source 1 and lens 3.The spherical wave that radiation source 1 is formed passes through
Diffraction optical element 2 forms distribution light field, and distribution light field forms illumination angle of divergence θ 1 by lens 3.Illumination angle of divergence θ 1 with set
The ratio of photometric field angle of divergence θ 01 is amplification factor β 1.Adjust the distance between diffraction optical element 2 and lens 3, illumination diverging
Angle θ 1 also changes.Optical system output illumination angle of divergence amplification factor β 1 and illumination angle of divergence θ 1, diffraction optical element 2
The focal length f1 and convergent point A1 of light field angle of divergence θ 01, lens 3 are designed to the relationship between the distance d1 of diffraction optical element 2 are as follows:
β1=θ1/θ01=d1/f1。
Embodiment 2:
As shown in figure 3, radiation source 1 is convergence form light source.Diffraction optical element 2 be fresnel diffraction optical element or
Fraunhofer diffraction optical element, the design light field angle of divergence are θ 02.Lens 3 are negative lens.The light beam of radiation source 1 converges
To convergent point A2.D2 is distance of the convergent point A2 to diffraction optical element 2.F2 is distance of the convergent point A2 to lens 3, and thoroughly
The focal length of mirror 3, focal length are negative.Diffraction optical element 2 is placed between radiation source 1 and lens 3.The formation of radiation source 1
Spherical wave by diffraction optical element 2 formed distribution light field, distribution light field by lens 3 formed illumination angle of divergence θ 2.Illumination
The ratio of angle of divergence θ 2 and design light field angle of divergence θ 02 are amplification factor β 2.It adjusts between diffraction optical element 2 and lens 3
Distance, illumination angle of divergence θ 2 also change.Optical system output illumination angle of divergence amplification factor β 2 and illumination angle of divergence θ 2,
Diffraction optical element 2 design light field angle of divergence θ 02, lens 3 focal length f2 and convergent point A2 to diffraction optical element 2 distance d2
Between relationship are as follows: 2=θ of β, 2/ 02=d2/f2 of θ.
Embodiment 3:
As shown in figure 4, radiation source 1 is divergence form light source.Diffraction optical element 2 be fresnel diffraction optical element or
Fraunhofer diffraction optical element, the design light field angle of divergence are θ 03.Lens 3 are positive lens.The beam propagation of radiation source 1
Reversely converge to convergent point A3.D3 is distance of the convergent point A3 to diffraction optical element 2.F3 is convergent point A3 to lens 3
The focal length of distance and lens 3.Diffraction optical element 2 is placed between radiation source 1 and lens 3.The formation of radiation source 1
Spherical wave by diffraction optical element 2 formed distribution light field, distribution light field by lens 3 formed illumination angle of divergence θ 3.Illumination
The ratio of angle of divergence θ 3 and design light field angle of divergence θ 03 are amplification factor β 3.It adjusts between diffraction optical element 2 and lens 3
Distance, illumination angle of divergence θ 3 also change.Optical system output illumination angle of divergence amplification factor β 3 and illumination angle of divergence θ 3,
Diffraction optical element 2 design light field angle of divergence θ 03, lens 3 focal length f3 and convergent point A3 to diffraction optical element 2 distance d3
Between relationship are as follows: 3=θ of β, 3/ 03=d3/f3 of θ.
Claims (5)
1. a kind of illumination angle of divergence adjustable optical using diffraction optical element in conjunction with lens, it includes irradiation light
Source (1) and lens (3), it is characterised in that: diffraction optical element (2) are equipped between radiation source (1) and lens (3), it is described to spread out
It penetrates optical element (2) to be adjusted at a distance from lens (3), the spherical wave that the radiation source (1) issues passes through the diffraction light
It learns element (2) and forms distribution light field, distribution light field forms illumination angle of divergence θ, the diffraction optical element by the lens (3)
(2) diffraction optical element is irradiated for directional light, the design light field angle of divergence of diffraction optical element (2) is θ 0, radiation source (1) hair
Photosphere surface wave out converges to convergent point A by diffraction optical element (2), and the distance of convergent point A to lens (3) is f, convergent point
The distance of A to diffraction optical element (2) is that the ratio (θ/θ 0) of d, illumination angle of divergence θ and design light field angle of divergence θ 0 are times magnification
Number β, β=d/f.
2. a kind of adjustable light of the illumination angle of divergence using diffraction optical element in conjunction with lens according to claim 1
System, it is characterised in that: diffraction optical element (2) is fresnel diffraction optical element.
3. a kind of adjustable light of the illumination angle of divergence using diffraction optical element in conjunction with lens according to claim 1
System, it is characterised in that: diffraction optical element (2) is Fraunhofer diffraction optical element.
4. a kind of adjustable light of the illumination angle of divergence using diffraction optical element in conjunction with lens according to claim 1
System, it is characterised in that: the radiation source (1) is laser light source.
5. a kind of adjustable light of the illumination angle of divergence using diffraction optical element in conjunction with lens according to claim 1
System, it is characterised in that: the radiation source (1) is LED light source.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510495360.8A CN105527715B (en) | 2015-08-13 | 2015-08-13 | A kind of illumination angle of divergence adjustable optical using diffraction optical element in conjunction with lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510495360.8A CN105527715B (en) | 2015-08-13 | 2015-08-13 | A kind of illumination angle of divergence adjustable optical using diffraction optical element in conjunction with lens |
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| CN105527715A CN105527715A (en) | 2016-04-27 |
| CN105527715B true CN105527715B (en) | 2019-02-22 |
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| CN107490869B (en) * | 2017-08-24 | 2020-08-28 | 华天科技（昆山）电子有限公司 | Space structure light emitting device |
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| CN104296676B (en) * | 2014-09-29 | 2017-04-26 | 中国科学院光电研究院 | Heterodyne point diffraction interferometer based on phase shift of low-frequency-difference acousto-optic frequency shifter |
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Effective date of registration: 20170821 Address after: 314515, building 3, building 1156, Gaoqiao Road, Gaoqiao Town, Tongxiang, Zhejiang, Jiaxing 8, China Applicant after: Jiaxing Yu light photoelectric technology Co. Ltd. Address before: 2, No. 452, No. 6, No. 310000, Poplar Street, Hangzhou economic and Technological Development Zone, Zhejiang, A0817 Applicant before: HANGZHOU DONG SHANG OPTOELECTRONICS TECHNOLOGY CO., LTD. |
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