CN104536132A - Multi-aperture short-distance large-visual-area optical system and design method of scanning mirror - Google Patents
Multi-aperture short-distance large-visual-area optical system and design method of scanning mirror Download PDFInfo
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- CN104536132A CN104536132A CN201410748489.0A CN201410748489A CN104536132A CN 104536132 A CN104536132 A CN 104536132A CN 201410748489 A CN201410748489 A CN 201410748489A CN 104536132 A CN104536132 A CN 104536132A
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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
- G02B27/0012—Optical design, e.g. procedures, algorithms, optimisation routines
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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
- G02B17/02—Catoptric systems, e.g. image erecting and reversing system
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
- G02B26/105—Scanning systems with one or more pivoting mirrors or galvano-mirrors
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- Optics & Photonics (AREA)
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- Mechanical Optical Scanning Systems (AREA)
Abstract
The invention discloses a multi-aperture short-distance large-visual-area optical system and a design method of a scanning mirror. The optical system is composed of a rear optical part, an aperture part of an optical channel A, an aperture part of an optical channel B, a two-dimensional refraction mirror and the two-dimensional scanning mirror. The two-dimensional scanning mirror conducts two-dimensional scanning on targets in regions ABCDEF of a detected plane. According to the optical path reversible principle, the design method of the scanning mirror includes the following steps that firstly, a coordinate system is established and coordinate information of each plane and each point is calculated; secondly, a model is established in an optical design file and solved, wherein the coordinate posture of the two-dimensional refraction mirror is acquired; field vignetting coefficients of the two aperture parts are set; the coordinate posture of the two-dimensional scanning mirror is acquired; aperture view field and scanning postures are modeled; the posture of the two-dimensional scanning mirror in the optical model is adjusted, so that the two-dimensional scanning mirror is identical to a mechanical model; the size of the two-dimensional scanning mirror is determined. Compared with a pure geometric light theory, the design method is more specific, accurate and rapid in calculation.
Description
Technical field
The present invention relates to optical element design, specifically refer to the method for designing of the large vision area optical system of a kind of multiple aperture low coverage and scanning mirror.
Background technology
The instrument in astronautics and airborne remote sensing field, in order to reduce optical design difficulty, reduces its requirement to photoelectric receiving device, simultaneously for increasing detection viewing field, realizes Large visual angle detection by scanning mirror.Such as, in linear array multi-optical spectrum imaging system, rotated by scanning mirror, make the motion of instantaneous field of view's do perpendicular to heading of reception, thus realize line scanning, coordinate travelling forward of aircraft, complete two-dimensional scan.The scanning feature of this type systematic is: scanning mirror makes one dimension particles, the visual field of the Static optical system after scanning mirror is little, for milliradian magnitude, scanning mirror its light beam footmark size under different scanning angles is relevant to scanning angle larger, and relevant to the visual field of Static optical system less, therefore scanning mirror design is relatively simple.
Due to resource restrictions such as volume weights, remote sensing instrument requires increasingly harsh to the space layout of its optical-mechanical system and component size etc.In order to save space, weight, in conjunction with modes such as optical system space layout, hyperchannel compatible front-end optics, two-dimensional scan detections, the remote sensing in large regions can be realized by light little compact Static optical system and two-dimentional surface sweeping mirror.The scanning mirror design of this optical system, should make all flashlights enter system, not have again unnecessary inactive area, make the scanning mirror designed minimum.By theory calculate, calculate according to geometrical optics and be trapped among the track in scan mirror outside scanning light beam thus determine scanning mirror size, this Measures compare is abstract and loaded down with trivial details, for the system that the beam size especially used for space layout, multiple passage is different with parameters such as field angle more very.
The method for designing of a kind of multiple aperture low coverage large vision area system scan mirror that the present invention relates to is concrete, simple.
Summary of the invention
The technical matters that the present invention solves is: some problems existed based on prior art, designs a kind of Scan mirror optical element, the face that is closely detected is realized to the scanning probe in large regions.
Optical system of the present invention as shown in Figure 1.Optical system is made up of the aperture 3 of the aperture 2 of rear optics 1, optical channel A and optical channel B, two-dimentional turning mirror 4, Scan mirror 5.Optical channel A and optical channel B has respective bore and visual field, shares two-dimentional turning mirror 4 and the Scan mirror 5 in front.Scan mirror 5 carries out two-dimensional scan to being detected ABCDEF region, face internal object, the flashlight of each scanning attitude is through Scan mirror 5, reflex to two-dimentional turning mirror 4, point aperture enters the aperture 2 of optical channel A and the aperture 3 of optical channel B, then enters rear optical system 1.
The two-dimentional turning mirror 4 of described optical system is z in optical axis direction range aperture 2,3, Scan mirror 5 is x apart from two-dimentional turning mirror, y, it is H that Scan mirror 5 centre distance is detected face vertical range, scanning area is ABCDEF, and rocking scans angle is α left, and rocking scans angle is β to the right, pitching scanning angle is θ, as shown in Figure 2.
The method for designing of described a kind of multiple aperture in-house system scanning mirror, according to light path principle of reversibility, light from rear optical system 1 to the aperture 3 of the aperture 2 of optical channel A and optical channel B, then reflexes on Scan mirror 5 through two-dimentional turning mirror 4, then reflexes to the face of being detected.Concrete steps are as follows:
First set up global coordinate system and calculate the coordinate information of each and each point: the initial point (0,0,0) being optical system world coordinates with synthetic aperture center, aperture 2,3, then two-dimentional turning mirror 4 coordinate is (0,0, z1), Scan mirror 5 coordinate is (x2, y2, z2), be detected Surface scan region ABCDEF coordinate and be respectively A (xa, ya, za), B (xb, yb, zb), C (xc, yc, zc), D (xd, yd, zd), E (xe, ye, ze), F (xf, yf, zf), wherein, xa=x, ya=-H-y, za=z; Xb=x, yb=-H-y, zb=Htan α+z; Xc=Htan θ+x, yc=-H-y, zc=Htan α+z; Xd=Htan θ+x, yd=-H-y, zd=z; Xe=Htan θ+x, ye=-H-y, ze=-Htan β+z; Xf=x, yf=-H-y, zf=-Htan β+z;
Secondly Modling model solving in optical design file:
1) the coordinate attitude of two-dimentional turning mirror 4 solves
According to the coordinate relation of two-dimentional turning mirror 4 and Scan mirror 5, by the mirror angle x of two-dimentional turning mirror 4 to y to being set to variable V, be optimized the coordinate attitude solving and obtain two-dimentional turning mirror 4;
2) visual field, each aperture vignetting solves
According to the pore size of each optical channel with from axle amount definition aperture, visual field information is set, Lookup protocol each visual field coefficient of vignetting;
3) Scan mirror 5 local coordinate attitude solves
The attitude of Scan mirror 5 corresponding for ABCDEF point is set to different layouts, by step 1) coordinate figure that calculates, in majorized function, define the picpointed coordinate of the central vision in corresponding layout; Scan mirror 5 and the interval initial value that is detected face are set gradually as layout 1:H by layout, layout 2:((Htan α)
2+ H
2) ^0.5, layout 3:((Htan α)
2+ (Htan θ)
2+ H
2)
0.5, layout 4:((Htan θ)
2+ H
2)
0.5, layout 5:((Htan β)
2+ (Htan θ)
2+ H
2) 0.5, layout 6:((Htan β)
2+ H
2)
0.5, above data or measure after setting up world coordinates model with SolidWorks; Again by the mirror angle x of Scan mirror 5 to y to being set to variable V, Scan mirror 5 and the interval that is detected face are set to V, are optimized and obtain scanning mirror coordinate attitude corresponding to 6 boundary scan points;
4) visual field, each aperture and scanning Attitude Modeling
In optical design software, aperture 2,3 is set to 2 layouts, inputs respective visual field and coefficient of vignetting, this is the 1st layer of multiplet; The attitude of Scan mirror 5 is set to the attitude that previous step Optimization Solution goes out, the attitude of Scan mirror 5 corresponding for ABCDEF point is set to 6 layouts, and this is the 2nd layer of multiplet; With the 1st weight structure of visual field, aperture information and use, have 12 layouts;
5) Scan mirror 5 optical coordinate is adjusted consistent with mechanical rotating shaft
Optical model is assembled in ray machine model, the middle Scan mirror 5 of constraint mechanical model rotates around the pitch axis of scanning mechanism and azimuth axis, optical model is carried out parallel cooperation with Scan mirror in mechanical model 5, there is certain angle in minute surface normal z-axis in two eyeglasses; Return in optical design file by this angle and adjust Scan mirror 5 around minute surface normal z-axis angle, generate new optical model; Imported in mechanical model again and carry out the parallel cooperation of minute surface, the minute surface that now each scanning attitude is corresponding overlaps with the mirror position that mechanical rotating shaft rotates;
6) Scan mirror 5 size is determined
Obtain the profile of Scan mirror 5 according to the hot spot footmark figure of 6 scanning area points, determine the size of Scan mirror 5 accordingly.
The advantage of optical system of the present invention is:
1. this method for designing is highly suitable for the optical system Scan mirror design of the multiple aperture of spatial arrangement, utilizes optical design software to carry out the reverse trace of light, and footmark figure specifically directly demonstrates the ray envelop of scanning mirror thus obtains the appearance profile of scanning mirror.The method compared to pure geometrical ray theory calculate, specifically, accurately, fast.
2. the optical model of the band light in optical design file is directly imported in mechanical model, according to the cooperation of a certain optical element, can the mechanical model of coupling system, the method also may be used for Baffle design.
Accompanying drawing explanation
Fig. 1 is multiple aperture low coverage large vision area optical system scans schematic diagram,
Fig. 2 is each direction view of multiple aperture low coverage large vision area optical system, and (a) is yz direction view, and (b) is xy direction view, and (c) is xz direction view
Fig. 3 is that scanning mirror rotates schematic diagram around minute surface normal, and (a) is for (b) before rotation is for after rotation
Fig. 4 is scanning mirror hot spot figure under each attitude,
In figure:
1 is rear optics;
2 is the aperture of optical channel A;
3 is the aperture of optical channel B;
4 is two-dimentional turning mirror;
5 is Scan mirror.
Embodiment
According to the optical structure chart of Fig. 1, devise a large vision area Based on Dual-Aperture in-house system scanning mirror.The arranged in parallel optical channel A of optical system and optical channel B, passage A aperture 2,4.24 ° × 4.24 °, visual field; Channel B aperture 3,4.24 ° × 4.24 °, visual field.Two aperture sizes are 10mm × 10mm, and center is at a distance of 12mm.Two dimension turning mirror 4 optical axis z is to the center 30mm in the common aperture of range aperture 2,3, Scan mirror 5 apart from x to 129mm, y is to 83.5mm, scanning mirror distance ground vertical range H is 1.7M, ground based scanning region ABCDEF, rocking scans angle 50 ° left, to the right rocking scans angle 60 °, pitching scanning angle 0 ~ 60 °.
Table 1 each point world coordinates
Table 2 two-dimentional turning mirror local coordinate attitude solves
| Rotate around x-axis | Rotate around y-axis |
| 28.52° | -36.41° |
Visual field, table 3 each aperture vignetting solves
Table 4 Scan mirror 5 local coordinate attitude solves
| Corresponding scanning area | Rotate around x-axis | Rotate around y-axis |
| A | 24.42° | 15.11° |
| B | 1.45° | 34.76° |
| C | 30.74° | 50.04° |
| D | 53.85° | 27.69° |
| E | 54.44° | -9.45° |
| F | 32.86° | -18.38° |
It is consistent with mechanical rotating shaft that table 5 adjusts scanning mirror optical coordinate
| Corresponding scanning area | Rotate around x-axis | Rotate around y-axis | Rotate around z-axis |
| A | 24.42° | 15.11° | 11.01° |
| B | 1.45° | 34.76° | 37.55° |
| C | 30.74° | 50.04° | 15.79° |
| D | 53.85° | 27.69° | 0° |
| E | 54.44° | -9.45° | -2.69° |
| F | 32.86° | -18.38° | -9.49° |
Obtain the profile of Scan mirror according to the hot spot footmark figure of 6 scanning area points, determine that it is of a size of 38 × 67 accordingly, as shown in Figure 4.
Claims (2)
1. the large vision area optical system of multiple aperture low coverage, it is made up of the aperture (2) of rear optics (1), optical channel A and the aperture (3) of optical channel B, two-dimentional turning mirror (4), Scan mirror (5), it is characterized in that:
Described optical channel A and optical channel B has respective bore and visual field, shares two-dimentional turning mirror (4) and the Scan mirror (5) in front; Scan mirror (5) carries out two-dimensional scan to being detected ABCDEF region, face internal object, the flashlight of each scanning attitude is through Scan mirror (5), reflex to two-dimentional turning mirror (4), point aperture enters the aperture (2) of optical channel A, the aperture (3) of optical channel B again, then enters rear optical system (1).
2. the large vision area optical system of a kind of multiple aperture low coverage according to claim 1, is characterized in that: the method for designing of described Scan mirror (5) is as follows:
Described two-dimentional turning mirror (4) optical axis direction range aperture (2,3) is z, Scan mirror 5 is x apart from two-dimentional turning mirror,-y, it is H that Scan mirror (5) centre distance is detected face vertical range, scanning area is ABCDEF, rocking scans angle is α left, and rocking scans angle is β to the right, and pitching scanning angle is θ;
First set up global coordinate system and calculate the coordinate information of each and each point: with aperture (2, 3) synthetic aperture center is the initial point (0 of optical system world coordinates, 0, 0), then two-dimentional turning mirror (4) coordinate is (0, 0, z1), Scan mirror (5) coordinate is (x2, y2, z2), be detected Surface scan region ABCDEF coordinate and be respectively A (xa, ya, za), B (xb, yb, zb), C (xc, yc, zc), D (xd, yd, zd), E (xe, ye, ze), F (xf, yf, zf), wherein, xa=x, ya=-H-y, za=z, xb=x, yb=-H-y, zb=Htan α+z, xc=Htan θ+x, yc=-H-y, zc=Htan α+z, xd=Htan θ+x, yd=-H-y, zd=z, xe=Htan θ+x, ye=-H-y, ze=-Htan β+z, xf=x, yf=-H-y, zf=-Htan β+z,
Secondly Modling model solving in optical design file:
1) the coordinate attitude of two-dimentional turning mirror (4) solves
According to the coordinate relation of two-dimentional turning mirror (4) and Scan mirror (5), by the mirror angle x of two-dimentional turning mirror (4) to y to being set to variable V, be optimized the coordinate attitude solving and obtain two-dimentional turning mirror (4);
2) visual field, each aperture vignetting solves
According to the pore size of each optical channel with from axle amount definition aperture, visual field information is set, Lookup protocol each visual field coefficient of vignetting;
3) Scan mirror (5) coordinate attitude solves
The attitude of Scan mirror (5) corresponding for ABCDEF point is set to different layouts, by step 1) coordinate figure that calculates, in majorized function, define the picpointed coordinate of the central vision in corresponding layout; Scan mirror (5) and the interval initial value that is detected face are set gradually as layout 1:H by layout, layout 2:((Htan α)
2+ H
2) ^0.5, layout 3:((Htan α)
2+ (Htan θ)
2+ H
2)
0.5, layout 4:((Htan θ)
2+ H
2)
0.5, layout 5:((Htan β)
2+ (Htan θ)
2+ H
2) 0.5, layout 6:((Htan β)
2+ H
2)
0.5, above data or measure after setting up world coordinates model with SolidWorks; Again by the mirror angle x of Scan mirror (5) to y to being set to variable V, the interval that Scan mirror (5) is detected face is set to V, is optimized and obtains scanning mirror coordinate attitude corresponding to 6 boundary scan points;
4) visual field, each aperture and scanning Attitude Modeling
In optical design software, aperture (2,3) are set to 2 layouts, input respective visual field and coefficient of vignetting, this is the 1st layer of multiplet; The attitude of Scan mirror (5) is set to the attitude that previous step Optimization Solution goes out, the attitude of Scan mirror (5) corresponding for ABCDEF point is set to 6 layouts, and this is the 2nd layer of multiplet; With the 1st weight structure of visual field, aperture information and use, have 12 layouts;
5) Scan mirror (5) optical coordinate is adjusted consistent with mechanical rotating shaft
Optical model is assembled in ray machine model, Scan mirror (5) in constraint mechanical model rotates around the pitch axis of scanning mechanism and azimuth axis, optical model is carried out parallel cooperation with Scan mirror in mechanical model (5), there is certain angle in minute surface normal z-axis in two eyeglasses; Return in optical design file by this angle and adjust Scan mirror (5) around minute surface normal z-axis angle, generate new optical model; Imported in mechanical model again and carry out the parallel cooperation of minute surface, the minute surface that now each scanning attitude is corresponding overlaps with the mirror position that mechanical rotating shaft rotates;
6) Scan mirror (5) size is determined
Obtain the profile of Scan mirror (5) according to the hot spot footmark figure of 6 scanning area points, determine the size of Scan mirror (5) accordingly.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410748489.0A CN104536132A (en) | 2014-12-09 | 2014-12-09 | Multi-aperture short-distance large-visual-area optical system and design method of scanning mirror |
| CN201510146192.1A CN104749775B (en) | 2014-12-09 | 2015-03-31 | A kind of method for designing of the big vision area optical system of multiple aperture low coverage and scanning mirror |
| CN201520185744.5U CN204679714U (en) | 2014-12-09 | 2015-03-31 | The large vision area optical system of a kind of multiple aperture low coverage |
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| CN201510146192.1A Active CN104749775B (en) | 2014-12-09 | 2015-03-31 | A kind of method for designing of the big vision area optical system of multiple aperture low coverage and scanning mirror |
| CN201520185744.5U Expired - Fee Related CN204679714U (en) | 2014-12-09 | 2015-03-31 | The large vision area optical system of a kind of multiple aperture low coverage |
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| CN201520185744.5U Expired - Fee Related CN204679714U (en) | 2014-12-09 | 2015-03-31 | The large vision area optical system of a kind of multiple aperture low coverage |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106646497A (en) * | 2016-10-20 | 2017-05-10 | 北醒（北京）光子科技有限公司 | Robot with two-dimensional range finder |
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| CN104536132A (en) * | 2014-12-09 | 2015-04-22 | 中国科学院上海技术物理研究所 | Multi-aperture short-distance large-visual-area optical system and design method of scanning mirror |
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| JP3545115B2 (en) * | 1995-09-22 | 2004-07-21 | 大日本スクリーン製造株式会社 | Method of correcting curvature of field and light beam scanning device used in the method |
| DE10344410A1 (en) * | 2003-09-25 | 2005-04-28 | Leica Microsystems | Scanning microscope with evanescent illumination |
| CN101419063A (en) * | 2008-10-30 | 2009-04-29 | 上海大学 | Cylindricity non-contact measurement method and system based on multi-diameter splicing technology |
| CN101738619B (en) * | 2009-11-27 | 2011-10-26 | 华中科技大学 | Two-waveband infrared optical system |
| CN104536132A (en) * | 2014-12-09 | 2015-04-22 | 中国科学院上海技术物理研究所 | Multi-aperture short-distance large-visual-area optical system and design method of scanning mirror |
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2014
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646497A (en) * | 2016-10-20 | 2017-05-10 | 北醒（北京）光子科技有限公司 | Robot with two-dimensional range finder |
| CN106646497B (en) * | 2016-10-20 | 2023-10-10 | 北醒（北京）光子科技有限公司 | Robot with two-dimensional distance measuring device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN204679714U (en) | 2015-09-30 |
| CN104749775A (en) | 2015-07-01 |
| CN104749775B (en) | 2017-06-27 |
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Application publication date: 20150422 |