CN105866931B - A kind of twin-lens panoramic imaging device - Google Patents
A kind of twin-lens panoramic imaging device Download PDFInfo
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- CN105866931B CN105866931B CN201610356950.7A CN201610356950A CN105866931B CN 105866931 B CN105866931 B CN 105866931B CN 201610356950 A CN201610356950 A CN 201610356950A CN 105866931 B CN105866931 B CN 105866931B
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- 238000003384 imaging method Methods 0.000 title claims abstract description 64
- 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
- 230000009286 beneficial effect Effects 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000004520 agglutination Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000006467 substitution 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 kind of twin-lens panoramic imaging device, it is made up of two groups of single-lens optical systems；The single-lens optical system includes：Isosceles right-angle prism, it is arranged on the first negative lens element corresponding to the right angle of isosceles right-angle prism one in front of side, sets gradually the first positive element, the second positive element, the second negative lens element, the 3rd positive element and imaging plane corresponding to another right angle of the isosceles right-angle prism immediately ahead of side, and second positive element and second negative lens element are mutually glued；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.Due to realizing 360 panoramic imageries using two groups of single-lens optical systems, and two groups of isosceles right-angle prisms are affixed and whole imaging device is reached subminaturization, so as to facilitate user to carry.
Description
Technical field
The present invention relates to optical image technology field, more particularly to a kind of twin-lens panoramic imaging device.
Background technology
Panoramic optical systems have been widely used in security protection, robot vision, navigation and military use.For panorama
Optical system mainly uses several schemes such as single-lens, twin-lens or many camera lenses at present.Single-lens panoramic optical systems are approximately complete
Scape, small volume and cost is low has certain market, due to being existed by device and visual field is limited, therefore can not accomplish truly
The 360 degree of panorama systems of visual field without dead angle.Twin-lens panoramic optical systems are spliced into panorama system using two super fish eye lenses
System, around 360 degree of visual fields without dead angle, moderate cost, but volume is relatively large.Many camera lens panoramic optical systems are using multiple common
Limited field camera lens is spliced into panorama system, and the system can equally reach 360 degree of full visual angles, and system use common lens so
Cost is not high, but the system is heavier using multiple camera lenses, fewer and fewer using this scheme, is only limitted to some particular markets.
Therefore, prior art has yet to be improved and developed.
The content 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 is not
Foot, can use for reference twin-lens panoramic optical systems in the prior art, it is only necessary to solve twin-lens panoramic optical system in the prior art
The problem of volume of uniting is relatively large, that is, obtaining can be around 360 degree of visual field without dead angle, the panoramic optical of moderate cost and small volume
System.Present invention aims at there is provided a kind of twin-lens panoramic imaging device, it is intended to solves body in current panoramic imaging device
The problem of larger carrying of product is inconvenient.
The technical proposal for solving the technical problem of the invention is as follows：
A kind of twin-lens panoramic imaging device, wherein, it is made up of two groups of single-lens optical systems；
The single-lens optical system includes：Isosceles right-angle prism, it is arranged on the right-angle side institute of isosceles right-angle prism one
The first negative lens element in front of corresponding side surface, set gradually the corresponding side of another right-angle side of the isosceles right-angle prism just before
The first positive element, the second positive element, the second negative lens element, the 3rd positive element and the imaging plane of side, and
Second positive element is mutually glued with 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 panoramic imagery system
System.
The twin-lens panoramic imaging device, wherein, the center line of first negative lens element and the isosceles right angle
The centerline of prism is on same straight line；First positive element, the second positive element, the second negative lens element,
The centerline of 3rd positive element is on same straight line.
The twin-lens panoramic imaging device, wherein, first negative lens element includes：First convex lens and first
Concave lens；The convex surface of first convex lens is towards object space.
The twin-lens panoramic imaging device, it is characterised in that first positive element, the second positive element,
Second negative lens element, the 3rd positive element and imaging plane are arranged from the bottom up successively.
The twin-lens panoramic imaging device, wherein, first positive element and the isosceles right-angle prism it
Between be additionally provided with diaphragm.
The twin-lens panoramic imaging device, wherein, in the single-lens optical system optics overall length scope be 16mm ~
18mm。
The twin-lens panoramic imaging device, wherein, two symmetrical described the in single-lens optical system described in two groups
Two convex lens center spacing are 10mm ~ 12mm in one negative lens element；The spacing at two symmetrical imaging plane centers is
21mm~24mm。
The twin-lens panoramic imaging device, wherein, in first negative lens element concave lens 0.45-0.55 it
Between, and the distance of convex lens to the isosceles right-angle prism central point is less than 3mm in the first negative mirror element.
The twin-lens panoramic imaging device, wherein, the right angle edge lengths of the isosceles right-angle prism are less than or equal to 6mm;
First positive element is made up of the second concave lens and the second convex lens, and second concave lens
Curvature be less than the second convex lens curvature.
The twin-lens panoramic imaging device, wherein, 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, passes through two groups of single-lens optical system groups
Into；The single-lens optical system includes：Isosceles right-angle prism, it is arranged on side corresponding to the right-angle side of isosceles right-angle prism one
In front the first square negative lens element, set gradually corresponding to another right-angle side of the isosceles right-angle prism immediately ahead of side the
One positive element, the second positive element, the second negative lens element, the 3rd positive element and imaging plane, and described
Two positive elements are mutually glued with second negative lens element；The hypotenuse of the isosceles right-angle prism of two groups of single-lens optical systems
It is bonded to each other, it is combined into twin-lens omnidirectional imaging system.Due to realizing 360 panoramic imageries using two groups of single-lens optical systems,
And two groups of isosceles right-angle prisms are affixed and whole imaging device is reached subminaturization, so as to facilitate user to carry.
Brief description of the drawings
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 the parameter provided in ZEMAX foundation specific embodiments
The MTF obtained.
Fig. 5 is that twin-lens panoramic imaging device of the present invention uses the parameter provided in ZEMAX foundation specific embodiments
The aberration obtained.
Embodiment
To make the objects, technical solutions and advantages of the present invention clearer, clear and definite, develop simultaneously embodiment pair referring to the drawings
The present invention is further described.It should be appreciated that specific embodiment described herein is used only for explaining of the invention, and without
It is of the invention in limiting.
The invention provides a kind of twin-lens panoramic imaging device, as shown in figure 1, by two groups of single-lens optical systems 1 and 2
Composition.
As shown in Fig. 2 the single-lens optical system 1（Its structure is identical with single-lens optical system 2）Including：Isosceles are straight
Angle prism 12, be arranged on the first negative lens element 11 corresponding to the right-angle side of isosceles right-angle prism 12 1 in front of side, according to
Secondary the first positive element 13, second set corresponding to another right-angle side of the isosceles right-angle prism 12 immediately ahead of side is just saturating
Mirror element 14, the second negative lens element 15, the 3rd positive element 16 and imaging plane, and second positive element 14 with
Second negative lens element 15 is mutually glued；The hypotenuse of the isosceles right-angle prism of two groups of single-lens optical systems is bonded to each other, group
Synthesize twin-lens omnidirectional imaging system.
In order to obtain more preferable imaging effect, it is preferred that the 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, clearly it is imaged to get, first negative lens element 11
Center line and the isosceles right-angle prism 12 centerline on same straight line；First positive element 13, second
Positive element 14, the second negative lens element 15, the centerline of the 3rd positive element 16 are on same straight line.
Specifically, first negative lens element includes：First convex lens and the first concave lens；First convex surface
The convex surface of lens is towards object space.In order that the eyeglass bore of whole system is unlikely to too small, it is in the present invention, recessed by described first
The curvature of face lens is less than the curved surface of the first convex lens.
In Fig. 2 and Fig. 3, the structure and its light path of the single-lens optical system can be seen that first positive lens
Element 13, the second positive element 14, the second negative lens element 15, the 3rd positive element 16 and imaging plane 19 are successively under
Up arrange.
Optics overall length scope is 16mm ~ 18mm in the single-lens optical system.
Two convex lens centers in two symmetrical 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.
The twin-lens panoramic imaging device, wherein, in first negative lens element concave lens 0.45-0.55 it
Between, and the distance of convex lens to the isosceles right-angle prism central point is less than 3mm in the first negative mirror element.
First positive element is made up of the first concave lens and the second convex lens, and second concave lens
Curvature be less than the second convex lens curvature.
As shown in Figures 2 and 3, it is additionally provided between first positive element 13 and the isosceles right-angle prism 12
Diaphragm 17.Diaphragm is additionally provided between first positive element and the isosceles right-angle prism.In isosceles right-angle prism
A diaphragm is placed between the first positive element, in order to keep after isosceles right-angle prism image rotation the miniaturization of whole system and examine
Consider the correction of whole system aberration.The main shaft of diaphragm perpendicular to isosceles right-angle prism the second right-angle side, and the first positive lens member
Part towards the concave surface midpoint of diaphragm, diaphragm midpoint, the second right-angle side of prism midpoint at grade.Diaphragm, the first positive lens
Element, the second positive element, the second negative lens element, the 3rd positive element and each main shaft of imaging plane are overlapped.Specific
In embodiment, diaphragm is 0.138mm apart from the distance of the right-angle side of isosceles right-angle prism second, 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 first positive element
Curvature be less than convex lens curvature, first positive element add be for make this optical system pass through diaphragm after mirror
Piece is unlikely to too small and is unfavorable for processing.First positive element is the positive lens of a model H-ZLAF55D glass material,
It is 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
The radius of curvature of concave surface is 15.937mm in the first positive element in system, and the radius of curvature on convex surface is 3.6mm, and first just
Thickness is 2.263mm between the concave surface summit of lens element and the convex surface summit of the first positive element.
One by the second positive element and the glued double agglutination lens group for positive lens formed of the second negative lens element
Conjunction is placed on after the first positive element, and cemented doublet combination is to correct the aberration of whole optical system.First
The distance on positive element convex surface summit and second the first convex surface of positive element summit is 0.1mm.Second positive element is
The positive lens of one model H-LAK53A glass material, is made up of two convex surfaces, the first convex surface in second positive element
Radius of curvature be 3.481mm, the radius of curvature on the second convex surface is 2.631mm, and the first convex surface top of the second positive element
Thickness is 1.801mm between second convex surface summit of point and the second positive element.Second negative lens element is a model H-
The negative lens of ZF52A glass materials, is made up of two concave surfaces, the radius of curvature on the first convex surface and the in second negative lens element
The radius of curvature on two the second convex surfaces of positive element is identical, i.e., radius of curvature is 2.631mm, and second is recessed in the second negative lens element
The radius of curvature in face is 3.757mm, and the second of the first concave surface summit and the second negative lens element of the second negative lens element is recessed
Thickness is 0.725mm between vertex of surface.
One the 3rd positive element is placed in after cemented doublet combination, and the 3rd positive element is whole in order to correct
Individual optical aberration and the enough working spaces of guarantee.Second negative lens element the second concave surface summit and the 5th element first are convex
The distance of vertex of surface is 0.1mm.3rd positive element is the positive lens of a model H-ZPK2A glass material, by two
Convex surface is constituted, and the radius of curvature on the first convex surface is 3.281mm in the 3rd positive element, and the radius of curvature on the second convex surface is
Thickness is between 11.326mm, and the first convex surface summit of the 3rd positive element and the second convex surface summit of the 3rd positive element
1.513mm。
Place an imaging plane 19 after the 3rd positive element to show optical system imaging, in order to obtain
More preferable imaging effect, optical filter 18 is additionally provided with the front of imaging plane 19.The imaging plane 19 is a model H-K9L
Flat glass, the distance of the 3rd the second convex surface of positive element and imaging plane is 0.731mm.
In order that the panoramic optical systems are minimized, first negative lens element is only placed before prism erecting,
And the first negative lens element thickness of control adds eyeglass to be less than 3mm apart from d1 to prism;It should be examined when selecting isosceles right-angle prism
The right angle edge lengths a of worry isosceles right-angle prism, which is less than, waits 6mm;Optics is total in the single-lens super flake visual field optical system of the microminiature
Long scope TTL should be controlled in 16mm ~ 18mm;Two symmetrical first in the single-lens super flake visual field optical system of two groups of microminiatures
The convex surface spacing d2 of negative lens element two is 10mm ~ 12mm, and the spacing d3 of two symmetrical imaging planes is 21mm ~ 24mm.
In view of 200 degree of visual field scope imagings, the 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, second positive element and lens mirror in the second negative lens element
Abbe number difference between piece is more than or equal to 25.
The optical system of design meets these above-mentioned condition optical parametric control conditions, then can realize that the present invention's is extra small
Type twin-lens panoramic optical systems.
Each optical parametric provided below with Zemax optical softwares is specific real to being explained in the optical system
Apply in example and following parameter setting is carried out to all optical elements in panoramic optical systems：
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 be isosceles right-angle prism right-angle side length, the curvature of the concave lens of k1 first, k2 is second
The curvature of concave lens, k3 be the second convex lens curvature, d1 be the first negative lens element thickness add eyeglass to prism apart from,
D2 is that the center spacing of two convex lens, d3 are two in two symmetrical first negative lens elements in two groups of single-lens optical systems
The spacing of individual symmetrical imaging plane, Δ vd is the Abbe number between eyeglass in the second positive element and the second negative lens element
Difference, TTL is the total length of photosystem.
In the present embodiment, with reference to Fig. 3, first negative lens element is a model H-ZLAF55D glass material
Negative lens, positioned at the Far Left of the single-lens super flake visual field optical system of microminiature, be made up of a convex surface and a concave surface,
Convex surface is towards object plane, a right-angle side of the concave surface towards isosceles right-angle prism;In light path system first in the first negative lens element
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
Thickness is 1.67mm between convex surface summit and the concave surface summit of the first negative lens element, and the scope of the bore of the first negative lens element is
10mm~12mm.The right-angle side midpoint on 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 perpendicular to concave surface towards prism the first right-angle side, concave surface summit with
The first right-angle side of isosceles right-angle prism midpoint distance is 1.42mm.Isosceles right-angle prism is located at after the first negative lens element, should
The isosceles right-angle prism of prism model H-ZF52A glass materials, the length of side of two right-angle sides of isosceles right-angle prism is setting
For 6mm.
The numerical value of these in specific embodiment meets the Optical Parametric for realizing the microminiature twin-lens panoramic optical systems of the present invention
Number control condition.As can be seen from Figure 4 the different MTF curves that different camera lens visual angles is obtained, Fig. 5 is respectively using above-mentioned
The lateral chromatic aberration to imaging of arrange parameter, it can be seen that panoramic imaging device provided by the present invention can be with from Fig. 4 and Fig. 5
Obtain good imaging effect.
Above-mentioned each lens combination turns into one group of single-lens optical system, and two groups of single-lens optical systems constitute a kind of microminiature
Twin-lens omnidirectional imaging system.The hypotenuse of two isosceles right-angle prisms carries out bonding shape in two groups of single-lens optical systems of microminiature
Into a square prism arrangement;Other elements are with this prism in the single-lens super flake visual field optical system of two microminiatures
The center line of combination carries out specular arrangement.
Beneficial effect, only placed first negative lens element, and control the first negative lens member before prism erecting
The distance of part and prism so that the first negative lens element thickness adds eyeglass to be less than 3mm to prism distance, in order that the panoramic optical
System compact;In view of 200 degree of visual field scope imagings, by the curvature of concave surface in the first negative lens element in 0.45-0.55
Between.It is miniaturization in order to keep whole system after prism erecting and the correction for considering whole system aberration to add diaphragm.By
Second positive element is combined with what the second negative lens element gluing was formed for the cemented doublet of positive lens, whole in order to correct
The aberration of optical system.3rd positive element is to correct whole optical aberration and ensure enough working space.
It is understood that for those of ordinary skills, can be with technique according to the invention scheme and its hair
Bright design is subject to equivalent substitution or change, and all these changes or replacement should all belong to the guarantor of appended claims of the invention
Protect scope.
Claims (8)
1. a kind of twin-lens panoramic imaging device, it is characterised in that be made up of two groups of single-lens optical systems；
The single-lens optical system includes：Isosceles right-angle prism, it is arranged on corresponding to the right-angle side of isosceles right-angle prism one
The first negative lens element in front of side, set gradually corresponding to another right-angle side of the isosceles right-angle prism immediately ahead of side
First positive element, the second positive element, the second negative lens element, the 3rd positive element and imaging plane, and it is described
Second positive element is mutually glued with 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；
The right angle edge lengths of the isosceles right-angle prism are less than or equal to 6mm；
First positive element is made up of the second concave lens and the second convex lens, and the song of second concave lens
Rate is less than the curvature of the second convex lens；
Diaphragm is additionally provided between first positive element and the isosceles right-angle prism；
The main shaft of the diaphragm is perpendicular to the second right-angle side of isosceles right-angle prism, and the first positive element is towards the recessed of diaphragm
Face midpoint, diaphragm midpoint, the second right-angle side of isosceles right-angle prism midpoint are at grade.
2. twin-lens panoramic imaging device according to claim 1, it is characterised in that the center of first negative lens element
The centerline of line and the isosceles right-angle prism is on same straight line；First positive element, the second positive element,
Second negative lens element, the centerline of the 3rd positive element are on same straight line.
3. twin-lens panoramic imaging device according to claim 2, it is characterised in that first negative lens element includes：
First convex lens and the first concave lens；The convex surface of first convex lens is towards object space.
4. according to any one of the claim 1-3 twin-lens panoramic imaging devices, it is characterised in that the first positive lens member
Part, the second positive element, the second negative lens element, the 3rd positive element and imaging plane are arranged from the bottom up successively.
5. according to any one of the claim 1-3 twin-lens panoramic imaging devices, it is characterised in that the single-lens optical system
Optics overall length scope is 16mm ~ 18mm in system.
6. according to any one of the claim 1-3 twin-lens panoramic imaging devices, it is characterised in that single-lens light described in two groups
Two convex lens center spacing are 10mm ~ 12mm in two symmetrical first negative lens elements in system；Two symmetrical
Imaging plane center spacing be 21mm ~ 24mm.
7. according to any one of the claim 1-3 twin-lens panoramic imaging devices, it is characterised in that the first negative lens member
Concave lens is between 0.45-0.55 in part, and in the first negative mirror element convex lens to the isosceles right-angle prism central point
Distance be less than 3mm.
8. twin-lens panoramic imaging device according to claim 1, it is characterised in that second positive element and second
Abbe number difference in negative lens element 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 |
| 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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| JP2005301110A (en) * | 2004-04-15 | 2005-10-27 | Sony Corp | Variable magnification lens system and imaging apparatus |
| JP5048474B2 (en) * | 2007-12-18 | 2012-10-17 | オリンパス株式会社 | Fisheye lens and imaging apparatus equipped with the same |
| CN201434932Y (en) * | 2009-06-09 | 2010-03-31 | 宁波舜宇车载光学技术有限公司 | Novel megapixel wide-angle lens |
| JP5652349B2 (en) * | 2011-07-25 | 2015-01-14 | 株式会社リコー | Wide-angle lens and omnidirectional imaging device |
| JP6019970B2 (en) * | 2012-09-11 | 2016-11-02 | 株式会社リコー | Spherical imaging system and imaging optical system |
| CN105068214B (en) * | 2015-08-10 | 2017-12-01 | 玉晶光电(厦门)有限公司 | Portable electronic devices and its optical imaging lens |
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