CN106646840A - Equivalent optical system for omnidirectional point detector - Google Patents
Equivalent optical system for omnidirectional point detector Download PDFInfo
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- CN106646840A CN106646840A CN201611162746.8A CN201611162746A CN106646840A CN 106646840 A CN106646840 A CN 106646840A CN 201611162746 A CN201611162746 A CN 201611162746A CN 106646840 A CN106646840 A CN 106646840A
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- mirror
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- equivalent optical
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
- G02B17/0864—Catadioptric systems having non-imaging properties
- G02B17/0876—Catadioptric systems having non-imaging properties for light collecting, e.g. for use with a detector
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Abstract
The invention relates to the field of precision positioning in a large scale space and is aimed at providing an equivalent optical system for an omnidirectional point detector capable of enlarging a detection view field to be 360 degrees in horizontal direction and -45 degrees to 5 degrees in vertical direction via use of an ingenious and special optical structure while detection precision and response speed of the detector are improved. To achieve the above aim, the equivalent optical system for the omnidirectional point detector disclosed in a technical solution of the invention consists of a quadric surface and convex surface reflector, a photoelectric detector and an incident window, wherein the quadric surface and convex surface reflector comprises a hyperboloid and a paraboloid, the photoelectric detector is mounted right below the reflector, the incident window is a middle part cut out from a hollow ball, the quadric surface and convex surface reflector is positioned at an upper part of the middle part of the hollow ball, a convex surface of the quadric surface and convex surface reflector faces downward, a center of the hollow ball is superposed on an inner focal point of a lens of the quadric surface and convex surface reflector, and a center of the photoelectric detector is positioned at an outer focal point of the lens of the quadric surface and convex surface reflector. The equivalent optical system for the omnidirectional point detector is mainly applied to precision positioning in the large scale space.
Description
Technical field
The present invention relates to large scale space precise positioning field, more particularly to one kind connects for large-sized precision alignment system
Omnidirectional's point Detection Techniques of receiving apparatus.Concretely relate to omnidirectional's point probe equivalent optical system.
Background technology
Large scale space precise alignment system is that, in order to meet the processing and matching requirements of Large-scale Manufacturing, the system is used for reference
The measurement thought of global positioning system, is positioned using multiple laser sending stations to a reception device, is sent due to cell site
It is the scanning laser at the uniform velocity rotated around fixing axle, and the position of cell site is dynamic change, and planar receiver obviously can not
Meet dynamic positioning requirements, although and existing omnidirectional's Detection location technology can detect big field range inner light beam, it is fixed
Position precision is low, response speed is slow.Point detection system synthesis omnidirectional's detector and the advantage of point probe of omnidirectional, can not only be real
The detection of existing 360 ° of light beams, and position high accuracy, fast response time.
The photoelectric detector that existing omnidirectional's Detection location technology is adopted is mainly surface detector or line detector, is divided into
Imaging-type and non-imaged type.
Imaging-type technology general principle is that photoelectric detector is placed on the focal plane of imaging system, photodetector pair
Incident beam is imaged, then according to imaging facula determining the information such as beam direction, wavelength.The light beam detection of imaging-type is for reality
Now in big field range any direction light beam detection, imaging system is typically made up of fish eye lens, fish-eye visual field
Generally 180 °, maximum can reach 270 °, but fish-eye optical texture is extremely complex, be unfavorable for the miniaturization of structure.Separately
The imaging systems such as rotating prism, hololens are also adopted outward, but can not reach the visual field of omnidirectional require, and structure is multiple
It is miscellaneous, imageing sensor is had high demands.
Non-imaged type technology is typically with multichannel technology, and such as reception system is made up of multiple reception windows, each window
The different orientation of mouth correspondence, according to different window slogan light beam is detected.There are the technologies such as optical fiber delay, mask coding in addition
For detecting light beam.Compared with imaging-type Detection Techniques, non-imaged type Detection Techniques structure and data processing are relatively easy, but visit
Survey precision poor.
Surface detector or line detector are compared with point probe, and detectivity is poor, affect the raising of system detection accuracy.
The high-quality point probe that existing photoelectric technology is produced, can be used for the fields such as single photon counting, pole weak light detection, but by
It is very little in visual field, it is generally not used for light beam detection.
The content of the invention
To overcome the deficiencies in the prior art, it is contemplated that a kind of point probe equivalent optical system of omnidirectional is proposed, profit
With optical system structure cleverly, special, by detection viewing field while the detection accuracy and response speed of raising point probe
Increase to 360 ° of level, vertically -45 ° -+5 °.To achieve these goals, the technical solution used in the present invention is that omnidirectional's point is visited
Device equivalent optical system is surveyed, by including the quadratic surface convex reflecting mirror including hyperboloid, parabola, installed in the speculum
Immediately below photodetector, entrance window constitute, entrance window be intercept hollow ball mid portion, quadratic surface convex reflecting mirror position
In hollow ball mid portion top and convex surface downwards, the centre of sphere and the focus weight in quadratic surface convex reflecting mirror eyeglass of hollow ball
Close, photodetector is centrally located at the outer focus of quadratic surface convex reflecting mirror eyeglass.
Convex mirror is parabolic mirror, and the parabolic mirror has real focus, the parabolic mirror
A piece of convergent mirror is arranged right below, the convergent mirror is arranged right below photodetector, and the photodetector is centrally located at institute
State the focal point of the optical system that parabolic mirror and convergent mirror are constituted.
Incident window construction is reduced to open column shape structure, and quadratic surface convex reflecting mirror is changed to non-spherical reflector, aspheric
Face speculum possesses the interior focus and outer focus equivalent with quadratic surface convex reflecting mirror.
Omnidirectional's point probe equivalent optical system upper plane is boundary, visits with omnidirectional's point into being symmetrically placed with
Survey the identical structure of device equivalent optical system.
Of the invention the characteristics of and beneficial effect are：
(1) simple structure, is only capable of achieving the light beam detection of omnidirectional with a piece of or two panels eyeglass, so as to realize positioning；
(2) face battle array that need not be very big or linear array detector, only with single point detector, fast response time；
(3) the equivalent of point probe is realized with optical system, greatly improves the detection accuracy of light beam.
Description of the drawings：
Fig. 1 is equivalent point probe detection principle schematic diagram of the invention.
Fig. 2 is the structural representation of the doubly curved reflecting system of the embodiment of the present invention one.
Fig. 3 is the structural representation of the parabolic shape reflecting system of the embodiment of the present invention two.
Fig. 4 is the improved structure schematic diagram of the embodiment of the present invention one and two.
Fig. 5 is the structural representation that the present invention expands detection angle.
Specific embodiment
A kind of omnidirectional's point probe equivalent optical system, including the quadratic surface convex reflecting mirror such as hyperboloid, parabola, institute
State and install immediately below speculum photodetector, entrance window is installed outside the speculum and photodetector, realize 360 ° of level,
The vertically detection of -45 ° -+5 ° of incident ray.
As a further improvement on the present invention, with above-mentioned light beam detection system into symmetrically placed identical a set of detection
System, for detecting 360 ° of level, vertical -5 ° of -+45 ° of incident rays.
As a further improvement on the present invention, entrance window is that hollow ball-shape and the centre of sphere overlap with the interior focus of speculum,
So the light beam of focus will not change direction by entrance window in directive speculum.
The present invention can equivalent point probe carry out measuring beam, it is comprised the following steps that：
(1) using the focus characteristic of quadratic surface type convex reflector, such as hyperboloid has two focal positions, and one is located at mirror
In piece, one be located at eyeglass outside, for extended line in eyeglass focus F1Incident ray, Jing hyperboloid reflection after through another
One focus F2；Parabola only one of which is located at the real focus in eyeglass, parallel Jing after its reflection to the incident light of the focus
Systematic optical axis outgoing.
(2) hyperboloid has inside and outside two focuses, and inside focus necessarily converges at outer Jiao behind the incident reflected face of light
Point, places photodetector and is capable of achieving point detecting function herein.Due to bi-curved bifocal nature, the light beam of different angles
Detector position formed light spot energy difference is little and spot center is at the center of detector, therefore required photodetector
Photosurface need not be very big, directly enhances the detection accuracy and response speed of system.Therefore interior focus F of hyperboloidal mirror1
The equivalent point position of as equivalent point probe, actual detector position is outer focus F of hyperboloidal mirror2Position,
Any light incidence system in above-mentioned visual field, but the only extended line of incident direction is through interior focus F1Light could be
System is detected, and realizes the target of omnidirectional's point probe.
(3) for parabola, when light beam reaches reflecting surface Jing after entrance window refraction, extended line is anti-through parabola
Penetrate mirror foci F3Light can parallel optical axis outgoing, centered on the light light light pencil Jing parabolic mirrors immediately below
A piece of convergent mirror is received after assembling by the photodetector immediately below the piece lens, and spot center is located in detector
The heart.Therefore, focus F of parabolic mirror3The equivalent point position of alternatively equivalent point probe, is equally also capable of achieving omnidirectional's point
The target of detector.
As a further improvement on the present invention, in order to reduce the volume of system and the processing of entrance window, assembly difficulty, will
The entrance window of hollow ball-shape makes open column shape into.For the entrance window of open column shape, due to skew of the parallel flat to light, no
Different degrees of light translation is also had with angle incident ray, the incident light of different angles is through adding open column shape entrance window system
The hot spot of system has different degrees of bias, i.e., the equivalent point of equivalent point probe is no longer same point.It is equivalent in order to correct
The deviation of point, can make hyperboloidal mirror into non-spherical reflector, it is equivalent go out new focus.
As shown in figure 1, be equivalent point probe detection principle schematic diagram, for detecting 360 ° of level, vertically -45 ° -+5 °
The light beam of scope.
Embodiment one
As shown in Fig. 2 a kind of omnidirectional's point probe equivalent optical system, including face type is bi-curved convex reflector 1, institute
Stating hyperboloidal mirror 1 has interior focus 2 and outer focus 3.The underface of the hyperboloidal mirror 1 is provided with single point detector 4,
And the photodetector 4 is centrally located at the outer focus 3, there is protective case 5 outside the photodetector 4.It is described double
Curved reflector 1 and the outer installation plastic material entrance window 6 of the photodetector 4, the face type of the entrance window 6 is have certain thickness
The hollow ball of degree, and the centre of sphere is at the described interior focus 2 of the hyperboloidal mirror 1, in order to reduce volume, intercepts hollow ball
Mid portion.
In the present embodiment, between 360 ° of level, vertical -45 ° -+5 ° at any angle incident beam from the incidence
Window 6 incides the hyperboloidal mirror 1, described in hyperbolic mirror 1 reflect after, extended line through the focus 2 light (such as
With the light 7 and the light 8 with+5 ° of incidence of -45 ° of incidence) described in Jing hyperboloidal mirror 1 reflect after, incide the light
The center of electric explorer 4.
Embodiment two
As shown in Fig. 2 a kind of omnidirectional's point probe equivalent optical system, is, convex surface with the difference of embodiment one
Speculum is parabolic mirror 9, and the parabolic mirror 9 has real focus 10, and the parabolic mirror 9 is arranged right below
A piece of convergent mirror 11, the convergent mirror 11 is arranged right below and the identical photodetector 4 of embodiment one, the photodetector
4 are centrally located at the focus 12 of the optical system that the parabolic mirror 9 and convergent mirror 11 are constituted.
In the present embodiment, between 360 ° of level, vertical -45 ° -+5 ° at any angle incident beam from the entrance window
6 incide the parabolic mirror 9, described in parabola 9 reflect after, extended line through the focus 10 light (such as with-
The light 13 and the light 14 with+5 ° of incidence of 45 ° of incidence) meeting parallel optical axis outgoing, convergent mirror 11 reaches institute after assembling described in
State the center of photodetector 4.
Embodiment three
As shown in figure 3, a kind of omnidirectional's point probe equivalent optical system, convex mirror face type is aspherical 15, institute
Stating non-spherical reflector 15 itself can have two equivalent focus without focus but through the optimization of face shape, i.e., interior focus 16 and outer Jiao
Point 17.The photodetector 4 is installed at the position of outer focus 17, and the photodetector 4 is centrally located at outside described
At focus 17.The non-spherical reflector 15 and the photodetector 4 are externally provided with the entrance window 18 of open column shape.
In the present embodiment, the entrance window 18 is that structure is more simplified, assemble and process simpler open column shape structure,
In embodiment one and embodiment two extended line can excessively interior focus incident ray (such as with the light 19 of -45 ° of incidence and with+5 °
Incident light 20), can no longer converge at same focus.Therefore on the basis of Mirrors with second order surface, using optical design
It is aspherical that the quadratic surface face shape of speculum is optimized for even by software CODEV, and arranges -45 ° -+5 ° in LightTools
Between multiple visual fields, using LightTools ray tracing function combine the photosurface of the photodetector 4 location verification
Optimum results, finally give the non-spherical reflector 15 with 17 two equivalent focus of the interior focus 16 and outer focus.
In the present embodiment, it is hollow described in incident beam Jing at any angle between 360 ° of level, vertical -45 ° -+5 °
Column entrance window 18 incides the non-spherical reflector 15, after non-spherical reflector 15 reflects described in, only extended line Jing
The light (such as with the light 21 and the light 22 with+5 ° of incidence of -45 ° of incidence) for crossing the focus 16 gets to the outer focus
Detected by the photodetector 4 at 17.
Example IV
As shown in figure 5, introduce by taking aspherical types reflecting system as an example it is a kind of the vertical sounding angle of system is increased to-
45 ° -+45 ° of structure, i.e., into symmetrically placed identical structure 24 therewith directly over -45 ° of -+5 ° of detecting structures 23.
In the present embodiment, the detection of the detecting structure 23 receives the light beam in the range of vertical -45 ° -+5 °, the structure
24 detections receive vertical -5 ° of -+45 ° of scope inner light beams, total system be it is detectable receive from 360 ° of level, it is vertical -45 ° -
Light beam in the range of+45 °.
Claims (4)
1. a kind of omnidirectional's point probe equivalent optical system, is characterized in that, by including the quadratic surface including hyperboloid, parabola
Convex reflecting mirror, photodetector, entrance window are constituted immediately below the speculum, and entrance window is to intercept in hollow ball
Between part, quadratic surface convex reflecting mirror is located at hollow ball mid portion top and convex surface downwards, the centre of sphere of hollow ball with it is secondary
Focus overlaps in curved surface convex reflecting mirror eyeglass, and it is outer burnt that photodetector is centrally located at quadratic surface convex reflecting mirror eyeglass
Point.
2. omnidirectional's point probe equivalent optical system as claimed in claim 1, is characterized in that, convex mirror is parabola
Speculum, the parabolic mirror has real focus, and the parabolic mirror is arranged right below a piece of convergent mirror, the convergence
Mirror is arranged right below photodetector, and the photodetector is centrally located at the light that the parabolic mirror and convergent mirror are constituted
The focal point of system.
3. omnidirectional's point probe equivalent optical system as claimed in claim 1, is characterized in that, incident window construction is reduced to hollow
Column structure, quadratic surface convex reflecting mirror is changed to non-spherical reflector, and non-spherical reflector possesses anti-with quadratic surface convex surface
Penetrate the equivalent interior focus of mirror and outer focus.
4. omnidirectional's point probe equivalent optical system as claimed in claim 1, is characterized in that, omnidirectional's point probe is equivalent
Optical system upper plane is boundary, into being symmetrically placed with knot identical with omnidirectional's point probe equivalent optical system
Structure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611162746.8A CN106646840A (en) | 2016-12-15 | 2016-12-15 | Equivalent optical system for omnidirectional point detector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611162746.8A CN106646840A (en) | 2016-12-15 | 2016-12-15 | Equivalent optical system for omnidirectional point detector |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111308721A (en) * | 2020-03-04 | 2020-06-19 | 广东博智林机器人有限公司 | Optical window and laser radar |
| CN111999875A (en) * | 2020-07-27 | 2020-11-27 | 北京空间飞行器总体设计部 | Shared bifocal optical antenna system |
| CN113534427A (en) * | 2021-07-14 | 2021-10-22 | 西安粼粼光电科技有限公司 | Optical early warning tracking platform based on quick reflector array and working method |
| EP4390345A1 (en) * | 2022-12-19 | 2024-06-26 | Life Safety Distribution GmbH | Sensor with an omnidirectional field of view |
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| CN101102480A (en) * | 2007-07-27 | 2008-01-09 | 浙江工业大学 | Underwater video detection device based on the omnidirectional vision |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111308721A (en) * | 2020-03-04 | 2020-06-19 | 广东博智林机器人有限公司 | Optical window and laser radar |
| CN111308721B (en) * | 2020-03-04 | 2022-05-10 | 广东博智林机器人有限公司 | Optical window and laser radar |
| CN111999875A (en) * | 2020-07-27 | 2020-11-27 | 北京空间飞行器总体设计部 | Shared bifocal optical antenna system |
| CN113534427A (en) * | 2021-07-14 | 2021-10-22 | 西安粼粼光电科技有限公司 | Optical early warning tracking platform based on quick reflector array and working method |
| EP4390345A1 (en) * | 2022-12-19 | 2024-06-26 | Life Safety Distribution GmbH | Sensor with an omnidirectional field of view |
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Application publication date: 20170510 |