CN105866931A - Double-lens panoramic imaging device - Google Patents
Double-lens panoramic imaging device Download PDFInfo
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- CN105866931A CN105866931A CN201610356950.7A CN201610356950A CN105866931A CN 105866931 A CN105866931 A CN 105866931A CN 201610356950 A CN201610356950 A CN 201610356950A CN 105866931 A CN105866931 A CN 105866931A
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- 238000003384 imaging method Methods 0.000 title claims abstract description 70
- 230000003287 optical effect Effects 0.000 claims abstract description 65
- 230000000007 visual effect Effects 0.000 description 13
- 230000004075 alteration Effects 0.000 description 9
- 239000011521 glass Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B37/00—Panoramic or wide-screen photography; Photographing extended surfaces, e.g. for surveying; Photographing internal surfaces, e.g. of pipe
- G03B37/04—Panoramic or wide-screen photography; Photographing extended surfaces, e.g. for surveying; Photographing internal surfaces, e.g. of pipe with cameras or projectors providing touching or overlapping fields of view
Abstract
The invention provides a double-lens panoramic imaging device. The device comprises two single-lens optical systems, wherein each single-lens optical system comprises an isosceles right-angle prism, a first negative lens element arranged in front of a side surface corresponding to a right-angle edge of the isosceles right-angle prism as well as a first positive lens element, a second positive lens element, a second negative lens element, a third positive lens element and an imaging plane which are sequentially arranged right in front of the side surface corresponding to the other right-angle edge of the isosceles right-angle prism, and the second positive lens element and the second negative lens element are glued together; hypotenuses of the isosceles right-angle prisms of the two single-lens optical systems are mutually bonded to form a double-lens panoramic imaging system. 360-degree panoramic imaging is realized by means of the two single-lens optical systems, the two isosceles right-angle prisms are bonded together, so that the whole imaging device is super-minimized, and a user can carry the double-lens panoramic imaging device conveniently.
Description
Technical field
The present invention relates to optical image technology field, in particular a kind of twin-lens panoramic imaging device.
Background technology
Panoramic optical systems has been widely used in security protection, robot vision, navigation and military use.For panorama
Optical system currently mainly uses several schemes such as single-lens, twin-lens or many camera lenses.Single-lens panoramic optical systems approximation is complete
Scape, volume is little and low cost, has certain market, owing to being existed by device and visual field is limited, therefore can not accomplish truly
360 degree of visual fields without the panorama system at dead angle.Twin-lens panoramic optical systems uses two super fish eye lenses to be spliced into panorama system
System, around 360 degree of visual fields without dead angle, moderate cost, but volume is relatively large.The employing of many camera lenses panoramic optical systems is multiple commonly
Limited field camera lens is spliced into panorama system, and this system can reach 360 degree of full visual angles equally, and system use common lens so
Cost is the highest, but this system uses multiple camera lenses heavier, uses this scheme fewer and feweri, is only limitted to some particular markets.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
It is an object of the invention to provide the user a kind of twin-lens omnidirectional imaging system, in view of above-mentioned prior art not
Foot, can use for reference twin-lens panoramic optical systems in prior art, it is only necessary to solve twin-lens panoramic optical system in prior art
The problem that system volume is relatively large, i.e. obtaining can be around 360 degree of visual fields without the panoramic optical that dead angle, moderate cost and volume are little
System.Present invention aim at providing a kind of twin-lens panoramic imaging device, it is intended to solve body in current panoramic imaging device
The long-pending problem carrying more greatly inconvenience.
It is as follows that the present invention solves the technical scheme that technical problem used:
A kind of twin-lens panoramic imaging device, wherein, is made up of two groups of single-lens optical systems；
Described single-lens optical system includes: isosceles right-angle prism, be arranged on corresponding to described isosceles right-angle prism one right-angle side
First negative lens element in front, side, set gradually side dead ahead corresponding to another right-angle side of described isosceles right-angle prism
First positive element, the second positive element, the second negative lens element, the 3rd positive element and imaging plane, and described
Second positive element is mutually glued with described second negative lens element；
The hypotenuse of the isosceles right-angle prism of two groups of single-lens optical systems is bonded to each other, is combined into twin-lens omnidirectional imaging system.
Described twin-lens panoramic imaging device, wherein, the centrage of described first negative lens element and described isosceles right angle
The centerline of prism is on same straight line；Described first positive element, the second positive element, the second negative lens element,
The centerline of the 3rd positive element is on same straight line.
Described twin-lens panoramic imaging device, wherein, described first negative lens element includes: the first convex lens and first
Concave lens；The convex surface of described first convex lens is towards thing side.
Described twin-lens panoramic imaging device, it is characterised in that described first positive element, the second positive element,
Second negative lens element, the 3rd positive element and imaging plane arrange the most from the bottom up.
Described twin-lens panoramic imaging device, wherein, between described first positive element and described isosceles right-angle prism also
It is provided with diaphragm.
Described twin-lens panoramic imaging device, wherein, in described single-lens optical system optics overall length scope be 16mm ~
18mm。
Described twin-lens panoramic imaging device, wherein, two symmetrical described in single-lens optical system described in two groups
In one negative lens element, two convex lens center distance are 10mm ~ 12mm；The spacing at two symmetrical imaging plane centers is
21mm~24mm。
Described twin-lens panoramic imaging device, wherein, in described first negative lens element concave lens 0.45-0.55 it
Between, and in the first negative mirror element, convex lens is less than 3mm to the distance of described isosceles right-angle prism central point.
Described twin-lens panoramic imaging device, wherein, the right-angle side length of described isosceles right-angle prism is less than or equal to 6mm;
Described first positive element is made up of the second concave lens and the second convex lens, and the song of described second concave lens
Rate is less than the curvature of the second convex lens.
Described twin-lens panoramic imaging device, wherein, described second positive element and lens in the second negative lens element
Abbe number difference between eyeglass is more than or equal to 25.
Beneficial effect, the invention provides a kind of twin-lens panoramic imaging device, by two groups of single-lens optical system groups
Become；Described single-lens optical system includes: isosceles right-angle prism, be arranged on side corresponding to described isosceles right-angle prism one right-angle side
In front side the first negative lens element, set gradually the of side dead ahead corresponding to another right-angle side of described isosceles right-angle prism
One positive element, the second positive element, the second negative lens element, the 3rd positive element and imaging plane, and described
Two positive element are mutually glued with described second negative lens element；The hypotenuse of the isosceles right-angle prism of two groups of single-lens optical systems
Bonded to each other, it is combined into twin-lens omnidirectional imaging system.Owing to utilizing two groups of single-lens optical systems to realize 360 panoramic imageries,
And two groups of isosceles right-angle prisms are affixed and, make whole imaging device reach subminiaturization, thus facilitate user to carry.
Accompanying drawing explanation
Fig. 1 is the structural representation of twin-lens panoramic imaging device of the present invention.
Fig. 2 is the structural representation of single-lens optical system of the present invention.
Fig. 3 is the light path schematic diagram of single-lens optical system of the present invention.
Fig. 4 is that twin-lens panoramic imaging device of the present invention uses ZEMAX according to the parameter provided in specific embodiment
The MTF obtained.
Fig. 5 is that twin-lens panoramic imaging device of the present invention uses ZEMAX according to the parameter provided in specific embodiment
The aberration obtained.
Detailed description of the invention
For making the purpose of the present invention, technical scheme and advantage clearer, clear and definite, develop simultaneously embodiment pair referring to the drawings
The present invention further describes.Should be appreciated that specific embodiment described herein is used only for explaining the present invention, and need not
In limiting the present invention.
The invention provides a kind of twin-lens panoramic imaging device, as it is shown in figure 1, by two groups of single-lens optical systems 1 and 2
Composition.
As in figure 2 it is shown, described its structure of single-lens optical system 1(is identical with single-lens optical system 2) including: isosceles are straight
Angle prism 12, it is arranged on first negative lens element 11 in front, side corresponding to described isosceles right-angle prism 12 1 right-angle side, depends on
Secondary the first positive element 13, second arranging side dead ahead corresponding to described another right-angle side of isosceles right-angle prism 12 is the most saturating
Mirror element the 14, second negative lens element the 15, the 3rd positive element 16 and imaging plane, and described second positive element 14 with
Described second negative lens element 15 phase is glued；The hypotenuse of the isosceles right-angle prism of two groups of single-lens optical systems is bonded to each other, group
Synthesis twin-lens omnidirectional imaging system.
In order to obtain more preferable imaging effect, it is preferred that described single-lens optical system is the single-lens super flake of microminiature
Visual field optical system.
It may occur to persons skilled in the art that, in order to get imaging clearly, described first negative lens element 11
The centerline of centrage and described isosceles right-angle prism 12 on same straight line；Described first positive element 13, second
The centerline of positive element the 14, second negative lens element the 15, the 3rd positive element 16 is on same straight line.
Concrete, described first negative lens element includes: the first convex lens and the first concave lens；Described first convex surface
The convex surface of lens is towards thing side.In order to make the eyeglass bore of whole system be unlikely to too small, in the present invention, by described first recessed
The curvature of face lens is less than the curved surface of the first convex lens.
By in Fig. 2 and Fig. 3, structure and the light path thereof of described single-lens optical system are it can be seen that described first plus lens
Element the 13, second positive element the 14, second negative lens element the 15, the 3rd positive element 16 and imaging plane 19 successively under
Up arrange.
In described single-lens optical system, optics overall length scope is 16mm ~ 18mm.
Two convex lens centers in two symmetrical described first negative lens elements in single-lens optical system described in two groups
Spacing is 10mm ~ 12mm；The spacing at two symmetrical imaging plane centers is 21mm ~ 24mm.
Described twin-lens panoramic imaging device, wherein, in described first negative lens element concave lens 0.45-0.55 it
Between, and in the first negative mirror element, convex lens is less than 3mm to the distance of described isosceles right-angle prism central point.
Described first positive element is made up of the first concave lens and the second convex lens, and described second concave lens
Curvature less than the curvature of the second convex lens.
As shown in Figures 2 and 3, it is additionally provided with between described first positive element 13 and described isosceles right-angle prism 12
Diaphragm 17.It is additionally provided with diaphragm between described first positive element and described isosceles right-angle prism.At isosceles right-angle prism
And place a diaphragm between the first positive element, for the miniaturization of whole system and examining after keeping isosceles right-angle prism image rotation
Consider the correction of whole system aberration.The main shaft of diaphragm is perpendicular to the second right-angle side of isosceles right-angle prism, and the first plus lens unit
Part towards the concave surface midpoint of diaphragm, diaphragm midpoint, prism the second right-angle side midpoint at grade.Diaphragm, the first plus lens
Element, the second positive element, the second negative lens element, the 3rd positive element and each main shaft of imaging plane overlap.Specifically
In embodiment, the distance of diaphragm distance isosceles right-angle prism the second right-angle side is 0.138mm, and diaphragm is recessed from the first positive element
The distance in face is 0.359mm.
One the first positive element of placement after diaphragm, and the first concave lens of described first positive element
Curvature is less than the curvature of convex lens, and it is for making this optical system mirror after diaphragm that this first positive element adds
Sheet is unlikely to too small and is unfavorable for processing.First positive element be model be the plus lens of H-ZLAF55D glass material,
Being made up of a concave surface and a convex surface, concave surface is towards the second right-angle side of prism, and convex surface is towards the second positive element;Light path
In system, in the first positive element, the radius of curvature of concave surface is 15.937mm, and the radius of curvature of convex surface is 3.6mm, and first just
Between the concave surface summit of lens element and the convex surface summit of the first positive element, thickness is 2.263mm.
One cemented doublet group for plus lens formed by the second positive element and the second negative lens element gluing
After conjunction is placed on the first positive element, the combination of this cemented doublet is the aberration in order to correct whole optical system.First
Positive element convex surface summit is 0.1mm with the distance on second positive element the first convex surface summit.Second positive element is
One model is the plus lens of H-LAK53A glass material, is made up of two convex surfaces, the first convex surface in this second positive element
Radius of curvature be 3.481mm, the radius of curvature of the second convex surface is 2.631mm, and the first convex surface top of the second positive element
Between the second convex surface summit of point and the second positive element, thickness is 1.801mm.Second negative lens element be a model be H-
The minus lens of ZF52A glass material, is made up of two concave surfaces, the radius of curvature of the first convex surface and the in this second negative lens element
The radius of curvature of two positive element the second convex surfaces is identical, i.e. radius of curvature is 2.631mm, and in the second negative lens element, second is recessed
The radius of curvature in face is 3.757mm, and the first concave surface summit of the second negative lens element is recessed with the second of the second negative lens element
Between vertex of surface, thickness is 0.725mm.
After one the 3rd positive element is placed in cemented doublet combination, the 3rd positive element is whole in order to correct
Individual optical aberration and ensure enough work spaces.Second negative lens element the second concave surface summit is convex with the 5th element first
The distance of vertex of surface is 0.1mm.3rd positive element be model be the plus lens of H-ZPK2A glass material, by two
Convex surface forms, and in the 3rd positive element, the radius of curvature of the first convex surface is 3.281mm, and the radius of curvature of the second convex surface is
Between 11.326mm, and the second convex surface summit of the first convex surface summit of the 3rd positive element and the 3rd positive element, thickness is
1.513mm。
After the 3rd positive element, place an imaging plane 19 optical system imaging is shown, in order to obtain
Preferably imaging effect, is additionally provided with optical filter 18 in imaging plane 19 front.This imaging plane 19 be a model be H-K9L
Flat glass, the distance of the 3rd positive element the second convex surface and imaging plane is 0.731mm.
In order to make this panoramic optical systems miniaturization, before prism erecting, only placed first negative lens element,
And control the first negative lens element thickness adds eyeglass to prism distance d1 less than 3mm;Should examine when selecting isosceles right-angle prism
Consider right-angle side length a of isosceles right-angle prism less than waiting 6mm;In the optical system of this microminiature single-lens super flake visual field, optics is total
Long scope TTL should control at 16mm ~ 18mm;In two groups of microminiature single-lens super flake visual field optical systems two symmetrical first
Negative lens element two convex surface spacing d2 is 10mm ~ 12mm, and spacing d3 of two symmetrical imaging planes is 21mm ~ 24mm.
In view of 200 degree of angle of visual field scope imagings, curvature k1 of the first concave lens in the first negative lens element is existed
Between 0.45-0.55.
In order to correct the aberration of this optical system, described second positive element and lens mirror in the second negative lens element
Abbe number difference between sheet is more than or equal to 25.
The optical system of design meets these condition optical parametric control conditions above-mentioned, then be capable of the extra small of the present invention
Type twin-lens panoramic optical systems.
Each optical parametric using Zemax optical software to provide below explains in this optical system, specifically real
Execute and optical elements all in panoramic optical systems carried out following parameter setting by example:
a=3mm;
d1=3.09mm; d2=12.19mm; d3=21.46mm;
k1=0.51; k2=0.06; k3=0.28;
Δvd=28.54 TTL=16.83mm;
In above-mentioned parameter, a is the length of isosceles right-angle prism right-angle side, the curvature of k1 the first concave lens, and k2 is the second concave surface
The curvature of lens, k3 is the curvature of the second convex lens, d1 be the first negative lens element thickness add eyeglass to prism distance, d2 be
The center distance of two convex lens in two the first symmetrical negative lens elements in two groups of single-lens optical systems, d3 be two right
The spacing of imaging plane claimed, Δ vd is that in the second positive element and the second negative lens element, Abbe number between eyeglass is poor
Value, TTL is the total length of photosystem.
In the present embodiment, in conjunction with Fig. 3, described first negative lens element be a model be H-ZLAF55D glass material
Minus lens, be positioned at the Far Left of microminiature single-lens super flake visual field optical system, be made up of a convex surface and a concave surface,
Convex surface is towards object plane, and concave surface is towards a right-angle side of isosceles right-angle prism;In light path system in the first negative lens element first
The radius of curvature of convex lens is 18.66mm, and the radius of curvature of the first concave lens is 1.96mm, and the first negative lens element
Between the concave surface summit of convex surface summit and the first negative lens element, thickness is 1.67mm, the bore of the first negative lens element in the range of
10mm~12mm.The right-angle side midpoint of the convex lens summit of the first negative lens element, concave lens summit and isosceles right-angle prism
At grade, the main shaft of the first negative lens element be perpendicular to concave surface towards the first right-angle side of prism, concave surface summit with
Isosceles right-angle prism the first right-angle side midpoint distance is 1.42mm.After isosceles right-angle prism is positioned at the first negative lens element, should
Prism model is the isosceles right-angle prism of H-ZF52A glass material, and the length of side of two right-angle sides of isosceles right-angle prism is for arranging
For 6mm.
In specific embodiment, these numerical value meet the Optical Parametric of the microminiature twin-lens panoramic optical systems realizing the present invention
Number control condition.The different MTF curve that the most different camera lens visual angles obtains, Fig. 5 respectively uses above-mentioned
The lateral chromatic aberration to imaging of parameter is set, from Fig. 4 and Fig. 5, can be seen that panoramic imaging device provided by the present invention is permissible
Obtain good imaging effect.
Above-mentioned each lens combination becomes one group of single-lens optical system, two groups of a kind of microminiatures of single-lens optical system composition
Twin-lens omnidirectional imaging system.In two groups of single-lens optical systems of microminiature, the hypotenuse of two isosceles right-angle prisms carries out bonding shape
Become a foursquare prism arrangement;In two microminiature single-lens super flake visual field optical systems, other elements are with this prism
The centrage of combination carries out specular arrangement.
Beneficial effect, only placed first negative lens element before prism erecting, and controls the first minus lens unit
Part and the distance of prism so that the first negative lens element thickness adds eyeglass to prism distance less than 3mm, in order to make this panoramic optical
System compact;In view of 200 degree of angle of visual field scope imagings, by the curvature of concave surface in the first negative lens element at 0.45-0.55
Between.Adding diaphragm is to keep the miniaturization of whole system after prism erecting and considering the correction of whole system aberration.By
The cemented doublet for plus lens that second positive element and the second negative lens element gluing are formed combines, whole in order to correct
The aberration of optical system.3rd positive element is to correct whole optical aberration and ensureing enough work spaces.
It is understood that for those of ordinary skills, can be according to technical scheme and send out
Bright design in addition equivalent or change, and all these change or replace the guarantor that all should belong to appended claims of the invention
Protect scope.
Claims (10)
1. a twin-lens panoramic imaging device, it is characterised in that be made up of two groups of single-lens optical systems；
Described single-lens optical system includes: isosceles right-angle prism, be arranged on corresponding to described isosceles right-angle prism one right-angle side
First negative lens element in front, side, set gradually side dead ahead corresponding to another right-angle side of described isosceles right-angle prism
First positive element, the second positive element, the second negative lens element, the 3rd positive element and imaging plane, and described
Second positive element is mutually glued with described second negative lens element；
The hypotenuse of the isosceles right-angle prism of two groups of single-lens optical systems is bonded to each other, is combined into twin-lens omnidirectional imaging system.
Twin-lens panoramic imaging device the most according to claim 1, it is characterised in that the center of described first negative lens element
The centerline of line and described isosceles right-angle prism is on same straight line；Described first positive element, the second positive element,
Second negative lens element, the 3rd positive element centerline on same straight line.
Twin-lens panoramic imaging device the most according to claim 2, it is characterised in that described first negative lens element includes:
First convex lens and the first concave lens；The convex surface of described first convex lens is towards thing side.
4. according to twin-lens panoramic imaging device described in any one of claim 1-3, it is characterised in that described first plus lens unit
Part, the second positive element, the second negative lens element, the 3rd positive element and imaging plane arrange the most from the bottom up.
5. according to twin-lens panoramic imaging device described in any one of claim 1-3, it is characterised in that at described first plus lens
It is additionally provided with diaphragm between element and described isosceles right-angle prism.
6. according to twin-lens panoramic imaging device described in any one of claim 1-3, it is characterised in that described single-lens optical system
In system, optics overall length scope is 16mm ~ 18mm.
7. according to twin-lens panoramic imaging device described in any one of claim 1-3, it is characterised in that single-lens light described in two groups
In system, in two symmetrical described first negative lens elements, two convex lens center distance are 10mm ~ 12mm；Two symmetries
The spacing at imaging plane center be 21mm ~ 24mm.
8. according to twin-lens panoramic imaging device described in any one of claim 1-3, it is characterised in that described first minus lens unit
In part, concave lens is between 0.45-0.55, and in the first negative mirror element convex lens to described isosceles right-angle prism central point
Distance less than 3mm.
Twin-lens panoramic imaging device the most according to claim 1, it is characterised in that the right-angle side of described isosceles right-angle prism
Length is less than or equal to 6mm;
Described first positive element is made up of the second concave lens and the second convex lens, and the song of described second concave lens
Rate is less than the curvature of the second convex lens.
Twin-lens panoramic imaging device the most according to claim 1, it is characterised in that described second positive element and the
In two negative lens elements, the Abbe number difference between lenses is more than or equal to 25.
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| CN106125262A (en) * | 2016-08-31 | 2016-11-16 | 上海杰图软件技术有限公司 | A kind of fish eye lens combination unit for panoramic shooting |
| CN107918198A (en) * | 2016-10-10 | 2018-04-17 | 广州长步道光电科技有限公司 | A kind of super clear lens system of 360 ° of panoramas of twin-lens composition |
| CN106707456A (en) * | 2016-12-28 | 2017-05-24 | 深圳市保千里电子有限公司 | Primary barrel of panoramic fish-eye lens, panoramic fish-eye lens and imaging method |
| CN106814411A (en) * | 2017-02-22 | 2017-06-09 | 深圳市保千里电子有限公司 | A kind of eyeglass of mobile phone full shot, full shot and imaging method |
| CN107219615A (en) * | 2017-07-31 | 2017-09-29 | 武汉赫天光电股份有限公司 | Panoramic optical systems and electronic equipment |
| WO2019024205A1 (en) * | 2017-07-31 | 2019-02-07 | 武汉赫天光电股份有限公司 | Panoramic optical system and electronic device |
| CN108449539A (en) * | 2018-06-07 | 2018-08-24 | 深圳浪涛数码有限公司 | Multi-lens imaging device and multi-lens imaging system |
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| CN105866931B (en) | 2017-08-25 |
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