CN101038366A - Multi-sheet type panoramic looking-around imaging lens - Google Patents
Multi-sheet type panoramic looking-around imaging lens Download PDFInfo
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- CN101038366A CN101038366A CN 200710068223 CN200710068223A CN101038366A CN 101038366 A CN101038366 A CN 101038366A CN 200710068223 CN200710068223 CN 200710068223 CN 200710068223 A CN200710068223 A CN 200710068223A CN 101038366 A CN101038366 A CN 101038366A
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Abstract
The invention discloses a multiple panoramic imaging lens. The lens adopts the lens of the front and behind pieces with different materials, various surface types, forms the multiple panoramic imaging lens through gluing, sealing joint or split type, one face of the front lens is the first protruded outward annular refracting surface, the connection between the front and behind pieces is the combination surface, the other side of the behind lens is the first concave annular refracting surface, the center of the first front annular refracting surface has the second refracting surface, the annular rim in the first refracting surface is connected with the rim of the second refracting surface, the center of first annular refracting surface has the second refracting surface, the inside annular rim of the first refracting surface is connected with the rim of the second refracting surface. With the combination of different materials, the freedom of design for this invention is higher, correct part of the chromatic aberration during the imaging of the panoramic lens, reduce the load of successive lens for correcting the chromatic aberration, and decrease the volume of long focus panoramic optical system. Properly select the materials for forming the panoramic lens, the field of view may be enlarged.
Description
Technical field
The present invention relates to imaging len, relate in particular to a kind of multi-sheet type panoramic looking-around imaging lens.
Background technology
As patent US Patent 4,566,763,1986 and US Patent 5,473,474,1995 is described, extrawide angle lens adopts plane cylinder sciagraphy FCP (Flat Cylinder Perspective), will project to around the cylindrical field of view of 360 ° of scopes of system optical axis in the annular region on the two dimensional surface.This full shot is made of translucent materials such as glass, the geometry of extrawide angle lens and follow-up lens combination thereof is by shown in Figure 1, lens simultaneously are outwards outstanding annular first plane of refraction 1, the lens another side is concave surface annular first reflecting surface 2, be provided with concave surface second reflecting surface 3 at the lens annular first plane of refraction center, intracardiac ring edge and second reflecting surface, 3 side edge in annular first plane of refraction 1, be provided with second plane of refraction 4 at concave surface annular first reflecting surface 2 centers, intracardiac ring edge and second plane of refraction, 4 side edge in concave surface annular first reflecting surface 2.
Light enters from 1 face and is refracted into 2, reflexes to 3 through 2 faces, reflexes to 4 through 3 faces, reflects lens at 4 faces at last.Light is by the portion or the rear formation virtual image within it behind the extrawide angle lens, and this virtual image is transformed into real image by follow-up lens combination L, and the CCD/CMOS detector that is positioned at image planes IMA receives.
The present technical matters that exists: parallel rays is by behind the PAL, and portion or rear form the virtual image within it.Because this extrawide angle lens is a hyper-hemispherical lens, visual field big (200 degree or more), the light path complexity, the correction of aberration, especially lateral chromatic aberration is a key issue, needs complicated follow-up lens combination L to realize real image conversion and aberration correction.Because the visual field is too big, at present known extrawide angle lens focal length is all very little, and the focal length that proposes as Ian Powell is the design (1994) of 2.65mm; The Sony Corporation's focal length of input on market is about the design of 1.5mm.In long-focus extrawide angle lens system; because the extrawide angle lens aberration correction is limited in one's ability; mainly bear the task of aberration correction by follow-up lens combination; this can cause follow-up lens combination L too complicated usually; system bulk is too huge; the chromatic aberration correction difficulty, energy loss is big, seriously limits the design and use of long-focus extrawide angle lens.
Summary of the invention
The purpose of this invention is to provide a kind of multi-sheet type panoramic looking-around imaging lens.
Before a kind of multi-sheet type panoramic looking-around imaging lens adopts, the lens of rear panel different materials, multiple different surface type, by gummed, connect airtight or separate mode composition multi-sheet type panoramic looking-around imaging lens, lens rotate symmetry around optical axis, the anter lens simultaneously are outwards outstanding annular first plane of refraction, connect the rear panel lens behind the anter lens, before, the joint face of rear panel lens is a combinatorial surface, rear panel lens another side is concave surface annular first reflecting surface, be provided with second reflecting surface at the anter lens annular first plane of refraction center, the intracardiac ring edge and the second reflecting surface side edge in annular first plane of refraction, be provided with second plane of refraction at the concave surface annular first reflecting surface center, the intracardiac ring edge and the second plane of refraction side edge in concave surface annular first reflecting surface.
The combination of the combination that is combined as crown glass and flint glass of described forward and backward lens material or the combination of crown glass and crown glass or flint glass and flint glass, built-up sequence is any.The surface type of combinatorial surface is sphere, be carved with the surface of microstructure, odd aspheric surface or even aspheric surface.Combinatorial surface is convex surface, concave surface or plane.
Before another kind of multi-sheet type panoramic looking-around imaging lens adopts, in, the lens of rear panel different materials, multiple different surface type, by gummed, connect airtight or separate mode composition multi-sheet type panoramic looking-around imaging lens, lens rotate symmetry around optical axis, the anter lens simultaneously are outwards outstanding annular first plane of refraction, sheet lens in connecing behind the anter lens, before, the joint face of middle sheet lens is first combinatorial surface, connect the rear panel lens behind the middle sheet lens, in, the joint face of rear panel lens is second combinatorial surface, rear panel lens another side is concave surface annular first reflecting surface, be provided with second reflecting surface at the anter lens annular first plane of refraction center, the intracardiac ring edge and the second reflecting surface side edge in annular first plane of refraction, be provided with second plane of refraction at the concave surface annular first reflecting surface center, the intracardiac ring edge and the second plane of refraction side edge in concave surface annular first reflecting surface, when middle sheet lens are multi-disc by that analogy.
The combination of the combination of the combination of the combination that is combined as crown glass, crown glass and crown glass of sheet lens material or crown glass, crown glass and flint glass or crown glass, flint glass and flint glass or flint glass, flint glass and flint glass before, during and after described, built-up sequence is any.When middle sheet lens were multi-disc, middle sheet lens material was the combination in any of crown glass and flint glass.Multiple different surface type is sphere, be carved with surface, odd aspheric surface or the even aspheric surface of microstructure.Combinatorial surface is convex surface, concave surface or plane.
The present invention uses the gummed of several different materials combinations or connects airtight lens combination and replaces the monolithic lens.Lifting two balsaming lens groups is example, and light is scioptics group three times repeatedly, only considers aberration, and what light reality was passed through is 4 lens combination.Gummed by using different materials or connect airtight, improve design freedom, made extrawide angle lens in imaging, bear the correction of a part of aberration, alleviated the burden of follow-up lens combination L correcting chromatic aberration, make the picture element than the optical system of long-focus improve volume-diminished.In addition, because the light in the multi-sheet type panoramic lens repeatedly by the interface of different materials deviation takes place, by suitably choosing the various materials of forming extrawide angle lens, control deviation direction can make field range obtain enlarging.
Description of drawings
Fig. 1 is an extrawide angle lens image-forming principle synoptic diagram, and γ is the position angle, and L is follow-up lens combination, and IMA is image planes;
Fig. 2 is an embodiment of the present invention 1, and promptly the two-piece type sphere glues together the panoramic looking-around imaging lens structural representation, and the cemented surface left and right sides is made of different materials, and cemented surface is a sphere;
Fig. 3 is a two-piece type gummed extrawide angle lens light path stretch-out view, is lens that axis of symmetry launches with the tangent line of two reflection spots, can see that light is actual to have passed through 4 balsaming lenss;
Fig. 4 is an embodiment of the present invention 2, and promptly the two-piece type aspheric surface is glued together the panoramic looking-around imaging lens structural representation, and the cemented surface left and right sides is made of different materials, and cemented surface is odd aspheric surface or even aspheric surface;
Fig. 5 is an embodiment of the present invention 3, and promptly the two-piece type microstructure is connected airtight panoramic ring imaging lens structure synoptic diagram, connects airtight the face left and right sides and is made of different materials, and connecting airtight face is the surface of being carved with microstructure;
Fig. 6 is an embodiment of the present invention 4, and promptly the two-piece type sphere separates panoramic ring imaging lens structure synoptic diagram, and the parting plane left and right sides is made of different materials, and parting plane is a sphere.
Fig. 7 is an embodiment of the present invention 5, i.e. the single combinatorial surface panoramic looking-around imaging lens of three-chip type structural representation, and two combinatorial surfaces are cemented surface, are made of three kinds of different materials about cemented surface, and two cemented surfaces are sphere;
Fig. 8 is an embodiment of the present invention 6, i.e. three-chip type hybrid combining face panoramic ring imaging lens structure synoptic diagram, two combinatorial surfaces are respectively that micro-structure surface connects airtight and the sphere gummed, and two combinatorial surface both sides are made of three kinds of different materials.
Among the figure: first plane of refraction 1, first reflecting surface 2, second reflecting surface 3, second plane of refraction 4, diaphragm 5, gummed sphere 6, gummed aspheric surface 7, connect airtight micro-structure surface 8, parting plane 9
Embodiment
Fig. 1 is an extrawide angle lens image-forming principle synoptic diagram, lens simultaneously are outwards outstanding annular first plane of refraction 1, the lens another side is concave surface annular first reflecting surface 2, be provided with concave surface second reflecting surface 3 at the lens annular first plane of refraction center, intracardiac ring edge and second reflecting surface, 3 side edge in annular first plane of refraction 1, be provided with second plane of refraction 4 at concave surface annular first reflecting surface 2 centers, intracardiac ring edge and second plane of refraction, 4 side edge in concave surface annular first reflecting surface 2.Light enters from 1 face and is refracted into 2, reflexes to 3 through 2 faces, reflexes to 4 through 3 faces, reflects lens at 4 faces at last.Light is by the portion or the rear formation virtual image within it behind the extrawide angle lens, and this virtual image is transformed into real image by follow-up lens combination L, and the CCD/CMOS detector that is positioned at image planes IMA receives.
Figure 2 shows that embodiment of the present invention 1, promptly the simplest two-piece type sphere gummed panoramic looking-around imaging lens, before the employing, the lens of rear panel different materials, combinatorial surface is a sphere, mode by gummed is formed the two-piece type panoramic looking-around imaging lens, lens rotate symmetry around optical axis, the anter lens simultaneously are outwards outstanding annular first plane of refraction 1, connect the rear panel lens behind the anter lens, before, the joint face of rear panel lens is a combinatorial surface, rear panel lens another side is concave surface annular first reflecting surface 2, be provided with second reflecting surface 3 at the anter lens annular first plane of refraction center, intracardiac ring edge and second reflecting surface, 3 side edge in annular first plane of refraction 1 are provided with second plane of refraction 4 at concave surface annular first reflecting surface 2 centers, intracardiac ring edge and second plane of refraction, 4 side edge in concave surface annular first reflecting surface 2.Diaphragm is positioned at after the imaging of two-piece type sphere gummed panoramic looking-around.
The combination of the combination that is combined as crown glass and flint glass of described forward and backward lens material or the combination of crown glass and crown glass or flint glass and flint glass, built-up sequence is any.Combinatorial surface is convex surface, concave surface or plane.
In the present embodiment, light goes into to inject two veneer type panoramic looking-around imaging lens from annular first plane of refraction 1, and by 6 refractions, deflection up or down takes place light path, arrives annular first reflecting surface 2 then before arriving annular first reflecting surface 2.After by annular first reflecting surface, 2 reflected backs, another arrives combinatorial surface 6, and is refracted, and light path changes again.Light arrives second reflecting surface, 3 backs and is reflected back again, and pass through combinatorial surface 6 this moment for the third time, and light path changes for the third time, at last from the second plane of refraction outgoing.
In the present embodiment, different different with the shape of combinatorial surface according to forward and backward selected material refractive index, the direction that light path changes at combinatorial surface can be different.As: for the panoramic looking-around imaging lens of anter refractive index less than the rear panel refractive index, downward deviation can take place during for the first time by combinatorial surface in the light of the following visual field of optical axis, on the contrary, for the panoramic ring imaging len of anter refractive index greater than the rear panel refractive index, deviation upwards can take place during for the first time by combinatorial surface in the light of the following visual field of optical axis.In the light path of same direction upper deflecting, the size of its amount of deflection is also according to the occurrence difference of forward and backward selected materials refractive index, the different and difference to some extent of the radius-of-curvature of combinatorial surface, and forward and backward refractive index differs big more, and deflection of light is obvious more; It is far away more that light goes into to inject the angle deviating incidence point normal of combinatorial surface, and deflection of light is obvious more.In addition, light path is also relevant with the visual field of light in the size of combinatorial surface amount of deflection, and according to refraction law, the big deflection of light degree in visual field is bigger.As a rule, crown glass is the material of the low chromatic dispersion of low-refraction, and flint glass is the material of the high chromatic dispersion of high index of refraction.Along with the optical glass industrial expansion, the glass of high-refractivity and low-dispersion and the high chromatic dispersion of low-refraction is also constantly come out by melting.As mentioned above, the radius-of-curvature of the selection of material and combinatorial surface can be followed according to the size and the visual field, edge of design visual field and be determined for the requirement of picture element.Select material can utilize the big deviation of big visual field to enlarge the visual field, edge rightly.
Two veneer type panoramic looking-around imaging lens in the present embodiment can be made like this: after designing optical system, determined the kind of optical glass, then anter is ground into designated shape respectively with rear panel, first plane of refraction 1 to anter, second reflecting surface 3 and combinatorial surface polish respectively, combinatorial surface to rear panel, first reflecting surface 2 and second plane of refraction 4 polish respectively, use specific optical glass adhesive that anter and rear panel are glued together, then on first reflecting surface 2 and second reflecting surface 3, by modes such as vacuum evaporations, plate metal and increase the reflectivity that anti-film increases by first reflecting surface 2 and second reflecting surface 3.On first plane of refraction 1 and second plane of refraction 4, plate anti-reflection film, increase the transmitance of first plane of refraction 1 and second plane of refraction 4.The wavelength of plated film is determined according to the centre wavelength of design.
Figure 3 shows that two-piece type gummed extrawide angle lens light path stretch-out view, choose the light reflection spot of first reflecting surface 2 of two-piece type gummed extrawide angle lens, do the tangent line of this reflection spot, and be two-piece type gummed extrawide angle lens that axis of symmetry is made mirror image with the tangent line of reflection spot.Choose the light reflection spot of second reflecting surface 3 in the mirror image then, make the tangent line of this reflection spot, and be mirror image that axis of symmetry is made second mirror image with the tangent line of reflection spot, can obtain the stretch-out view of light path.Can find out that according to Fig. 3 light is n through refractive index successively
1, n
2, n
1And n
2Glass.For the ease of understanding, can suppose that two-piece type gummed extrawide angle lens and its mirror image the air part between the mirror image and second mirror image is filled respectively and gone up refractive index is n
2And n
1, promptly the material of rear panel and anter (this imagination is filled does not influence actual light path) can find out that in fact light passed through the glass of 4 gummeds.So, appropriately choose combination of different materials, can use less sheet glass to reach the effect of using multi-disc glass, make extrawide angle lens in imaging, bear the correction of a part of aberration, alleviated the burden of follow-up lens combination L correcting chromatic aberration, make the picture element than the optical system of long-focus improve volume-diminished.
Figure 4 shows that embodiment of the present invention 2, the two-piece type aspheric surface gummed panoramic looking-around imaging lens that promptly structure is complicated slightly.Adopt the lens of forward and backward different materials, combinatorial surface is odd aspheric surface or even aspheric surface, forms the two-piece type panoramic looking-around imaging lens by the mode of gummed.The lens arrangement of present embodiment is identical with embodiment 1 with light path, no longer repeated description.
The combination of the combination that is combined as crown glass and flint glass of the described forward and backward lens material of present embodiment or the combination of crown glass and crown glass or flint glass and flint glass, built-up sequence is any.Combinatorial surface is convex surface, concave surface or plane.The lens material of present embodiment is selected identical with embodiment 1 with the system of selection of combinatorial surface shape, no longer repeated description.
The manufacture process and the embodiment 1 of two veneer type panoramic looking-around imaging lens in the present embodiment are basic identical, different parts be the process of lapping of aspheric surface combinatorial surface.Aspheric surface processing technology comprises numerical control small abrasive nose aspheric surface processing technology, strain disc polishing technology, ion beam polishing technology, Technique of Magnetorheological Finishing or the like.Can follow according to required precision and actual production conditions selects suitable process that combinatorial surface is processed.
For non-spherical lens, if aspheric surface slightly deviates from sphere,, use with the most adaptive spherical polishing instrument of aspheric surface and process then by traditional sphere grinding and polishing technology, obtain the spherical lens semi-manufacture, then polishing.If aspheric surface significantly departs from sphere, then to directly on lens blank, process aspherical shape with the numerical control formation lathe, in addition, also available special abrasive tool finally is processed into desired shape with immediate sphere, then polishing.
Be that example is simply explained aspheric polishing process below with the Technique of Magnetorheological Finishing: in magnetorheological grinding and polishing device, a drawing liquid pump is constantly extracted a small amount of magnetic rheological liquid out from liquid storage container, and extruding is transported in the swiveling wheel, swiveling wheel makes liquid enter into a thin band, and the part of optical element to be processed is immersed in this rectangular band that moves that contains magnetic rheological liquid.Magnet near a particular design is arranged below the swiveling wheel can produce strong local magnetic field.When magnetic rheological liquid flow to this field regions, it was thick clearly to become sticky in several milliseconds; And when liquid leaves this magnetic field, return to original state again.The liquid regions of retrogradation is exactly a polishing tool.Magnetic rheological liquid is by behind the optical element, with another pump absorption and send back in the reservoir.In polishing process, the buffing machine relay lens makes the zones of different of optical element be immersed in the magnetic rheological liquid to main shaft.
Figure 5 shows that embodiment of the present invention 3, two-piece type microstructure is promptly connected airtight the panoramic ring imaging len.Adopt the lens of forward and backward different materials, combinatorial surface is the surface of being carved with microstructure, forms the two-piece type panoramic looking-around imaging lens by the mode of connecting airtight.The lens arrangement of present embodiment is identical with embodiment 1 with light path, no longer repeated description.
The combination of the combination that is combined as crown glass and flint glass of described forward and backward lens material or the combination of crown glass and crown glass or flint glass and flint glass, built-up sequence is any.The microstructure of combinatorial surface is etched in convex surface, on concave surface or the plane.
In the present embodiment, light goes into to inject two veneer type panoramic looking-around imaging lens from annular first plane of refraction 1, and diffraction takes place the surface 6 by being carved with microstructure before arriving annular first reflecting surface 2, arrives annular first reflecting surface 2 then.After by annular first reflecting surface, 2 reflected backs, by combinatorial surface 6, diffraction takes place once more again.Light arrives second reflecting surface, 3 backs and is reflected back again, and pass through combinatorial surface 6 this moment for the third time, and diffraction takes place light for the third time, at last from the second plane of refraction outgoing.
The manufacture process and the embodiment 1 of two veneer type panoramic looking-around imaging lens in the present embodiment are basic identical, different parts be need be on forward and backward combinatorial surface etching coincide the microstructure that can connect airtight mutually.At aspects such as image quality, chromatic aberration correction and design freedoms, the optical element that is carved with microstructure with compared certain advantage based on traditional refraction optical element.
Be example with the binary optical structure in the micro optical structure below, simply set forth the process of microstructure: the manufacture craft of binary optical elements has a variety of, mainly is divided into many steps binary optical elements processing technology and continuous position binary optical elements processing technology mutually.The former mainly comprises etching method, Film forming method.The latter mainly contains the straight literary style of laser beam, direct electronic beam literary style and diamond turning method etc.Also have new producing methods such as excimer laser processing method and gray-tone mask method in addition.The job operation that can be fit to accuracy requirement existing processes condition selection according to the combinatorial surface that is carved with microstructure.
The step etching method is the main manufacturing technology of present binary optical elements, and its technological process generally comprises three steps: mask design and making, graph transfer printing and substrate etching.For the binary optical elements of leggy, then need repeatedly to repeat above-mentioned three step process process, carry out the alignment processing of mask.
At first, according to the practical design situation, utilize optical design software to design to be carved with a cover of microstructure combinatorial surface to be used for the mask graph of photoetching.Generate a cover binary amplitude mask by pattern generator then.Then, be coated with the last layer photoresist equably at substrate surface, first mask is placed on it, photoresist is exposed, by flush away (for positive photoresist), unexposed photoresist then remains the photoresist after the exposure through the back of developing.Like this, the figure on the mask is just transferred on the photoresist of substrate.Then, again substrate is carried out etching, is retained in on-chip photoresist, protect the substrate under it not to be etched then as resist, be etched to projected depth after, dispose remaining photoresist, obtain the binary optical elements of two phase four steps.For the element of leggy, the surface of the two phase element that obtains is above recoated photoresist, put second mask then, repeat the process of above-mentioned graph transfer printing and substrate etching.In repetitive process each time, the degree of depth of substrate etching is half of etching depth last time.
Figure 6 shows that embodiment of the present invention 4, promptly the two-piece type sphere separates the panoramic ring imaging len.Adopt the lens of forward and backward different materials, combinatorial surface is two release surfaces that a fixed gap is arranged.The lens arrangement of present embodiment is with identical with embodiment 1, no longer repeated description.
The combination of the combination that is combined as crown glass and flint glass of described forward and backward lens material or the combination of crown glass and crown glass or flint glass and flint glass, built-up sequence is any.Two combinatorial surfaces are convex surface, concave surface or plane.The shape of two combinatorial surfaces can be identical, also can be different
In the present embodiment, light goes into to inject two veneer type panoramic looking-around imaging lens from annular first plane of refraction 1, and by two combinatorial surfaces, deflection up or down takes place light path, arrives annular first reflecting surface 2 then before arriving annular first reflecting surface 2.After by annular first reflecting surface, 2 reflected backs, another arrives combinatorial surface 6, and light path changes again.Light arrives second reflecting surface, 3 backs and is reflected back again, and pass through combinatorial surface 6 this moment for the third time, and light path changes again, at last from the second plane of refraction outgoing.
The problem that present embodiment needs most attention is the total reflection problem of light.Because the refractive index of glass material is greater than air, and the field angle of two-piece type separation panoramic looking-around imaging lens is very big, for the visual field, edge, the light that incides on the combinatorial surface has bigger incident angle.For glass commonly used, the incident angle of edge field rays very easily reaches the threshold value of the angle of total reflection and can not be refracted away.So for glass commonly used, the shape of combinatorial surface should be chosen the direction to first reflecting surface, 2 projectioies usually, and its radius-of-curvature should be less, make incident angle on the combinatorial surface less than the threshold value of the angle of total reflection, and be refracted in the air of separation.
Though for sphere or aspheric design, present embodiment selects for material and the combinatorial surface shape has certain limitation, but for the surface of being carved with microstructure, present embodiment is concentrated for the chromatic aberration correction of long-wave band spectrum and diffraction efficiency the not available advantage of other embodiments, so remain of great value embodiment.
Be illustrated in figure 7 as embodiment of the present invention 5, i.e. the single combinatorial surface panoramic looking-around imaging lens of three-chip type.Before this embodiment adopts, in, the lens of rear panel different materials, form the three-chip type panoramic looking-around imaging lens by gummed, lens rotate symmetry around optical axis, the anter lens simultaneously are outwards outstanding annular first plane of refraction 1, sheet lens in connecing behind the anter lens, before, the joint face of middle sheet lens is first combinatorial surface, connect the rear panel lens behind the middle sheet lens, in, the joint face of rear panel lens is second combinatorial surface, rear panel lens another side is concave surface annular first reflecting surface 2, be provided with second reflecting surface 3 at the anter lens annular first plane of refraction center, intracardiac ring edge and second reflecting surface, 3 side edge in annular first plane of refraction 1, be provided with second plane of refraction 4 at concave surface annular first reflecting surface 2 centers, intracardiac ring edge and second plane of refraction, 4 side edge in concave surface annular first reflecting surface 2.First combinatorial surface and second combinatorial surface are sphere.
The combination of the combination of the combination of the combination that is combined as crown glass, crown glass and crown glass of sheet lens material or crown glass, crown glass and flint glass or crown glass, flint glass and flint glass or flint glass, flint glass and flint glass before, during and after described, built-up sequence is any.Combinatorial surface is plane, convex surface or concave surface.
In the present embodiment, light goes into to inject two veneer type panoramic looking-around imaging lens from annular first plane of refraction 1, by first combinatorial surface and the refraction of second combinatorial surface, light path changes for twice, arrives annular first reflecting surface 2 then before arriving annular first reflecting surface 2.After by annular first reflecting surface, 2 reflected backs, to return second combinatorial surface and first combinatorial surface again and be refracted, twice change takes place again in light path.Light arrives second reflecting surface, 3 backs and is reflected back again, and light path took place the 5th, six time and changed, at last from the second plane of refraction outgoing for the third time through first combinatorial surface and second combinatorial surface this moment.
The lens material of present embodiment is selected identical with embodiment 1 with the system of selection of combinatorial surface shape, no longer repeated description.
Three-chip type sphere gummed extrawide angle lens light path stretch-out view and Fig. 3 shown in the present embodiment is similar, choose the light reflection spot of first reflecting surface 2 of three-chip type gummed extrawide angle lens, do the tangent line of reflection spot, and be three-chip type gummed extrawide angle lens that axis of symmetry is made mirror image with the tangent line of reflection spot.Choose the light reflection spot of second reflecting surface 3 in the mirror image then, make the tangent line of reflection spot, and be mirror image that axis of symmetry is made second mirror image with the tangent line of reflection spot, can obtain the stretch-out view of light path.In fact light path is equivalent to by six balsaming lenss after launching.So, appropriately choose combination of different materials, can use less sheet glass to reach the effect of using multi-disc glass correcting chromatic aberration.
The manufacturing of three veneer type panoramic looking-around imaging lens in the present embodiment is identical with embodiment 1, no longer repeated description.
Figure 8 shows that embodiment of the present invention 6, i.e. three-chip type hybrid combining face panoramic ring imaging len.The lens of sheet different materials before, during and after the employing, first combinatorial surface are the surface of being carved with microstructure, make up by the mode of connecting airtight, and second combinatorial surface is a sphere, are combined into three-chip type hybrid combining face panoramic looking-around imaging lens by the mode of gluing together.The lens arrangement of present embodiment is identical with embodiment 5 with light path, no longer repeated description.
The combination of the combination of the combination of the combination that is combined as crown glass, crown glass and crown glass of sheet lens material or crown glass, crown glass and flint glass or crown glass, flint glass and flint glass or flint glass, flint glass and flint glass before, during and after described, built-up sequence is any.Combinatorial surface is plane, convex surface or concave surface.
The lens material of present embodiment is selected identical with embodiment 5 with the system of selection of combinatorial surface shape, no longer repeated description.
The manufacture process and the embodiment 1 of the non-micro-structure surface of the three-chip type hybrid combining face panoramic looking-around imaging lens in the present embodiment are basic identical.The processing mode of combinatorial surface that is carved with microstructure is identical with embodiment 3.
Multi-sheet type panoramic annular imaging len of the present invention is not limited to above-mentioned embodiment, and for the three-chip type panoramic looking-around imaging lens, two combinatorial surface can adopt the combination in any of embodiment 1, embodiment 2, embodiment 3 and embodiment 4.For greater than three panoramic looking-around imaging lens, its all combinatorial surfaces all can adopt the combination in any of embodiment 1, embodiment 2, embodiment 3 and embodiment 4.
Claims (9)
1. multi-sheet type panoramic looking-around imaging lens, it is characterized in that, before the employing, the lens of rear panel different materials, multiple different surface type, by gummed, connect airtight or separate mode composition multi-sheet type panoramic looking-around imaging lens, lens rotate symmetry around optical axis, the anter lens simultaneously are outwards outstanding annular first plane of refraction (1), connect the rear panel lens behind the anter lens, before, the joint face of rear panel lens is a combinatorial surface, rear panel lens another side is concave surface annular first reflecting surface (2), be provided with concave surface second reflecting surface (3) at the anter lens annular first plane of refraction center, intracardiac ring edge and second reflecting surface (3) side edge in annular first plane of refraction (1), be provided with second plane of refraction (4), intracardiac ring edge and second plane of refraction (4) side edge in concave surface annular first reflecting surface (2) at concave surface annular first reflecting surface (2) center.
2. a kind of multi-sheet type panoramic looking-around imaging lens according to claim 1, it is characterized in that the combination that is combined as crown glass and flint glass or the combination of crown glass and crown glass or the combination of flint glass and flint glass of described forward and backward lens material, built-up sequence is any.
3. a kind of multi-sheet type panoramic looking-around imaging lens according to claim 1 is characterized in that the surface type of described combinatorial surface is a sphere, is carved with surface, odd aspheric surface or the even aspheric surface of microstructure.
4. a kind of multi-sheet type panoramic looking-around imaging lens according to claim 1 is characterized in that described combinatorial surface is convex surface, concave surface or plane.
5. multi-sheet type panoramic looking-around imaging lens, it is characterized in that, before the employing, in, the lens of rear panel different materials, multiple different surface type, by gummed, connect airtight or separate mode composition multi-sheet type panoramic looking-around imaging lens, lens rotate symmetry around optical axis, the anter lens simultaneously are outwards outstanding annular first plane of refraction (1), sheet lens in connecing behind the anter lens, before, the joint face of middle sheet lens is first combinatorial surface, connect the rear panel lens behind the middle sheet lens, in, the joint face of rear panel lens is second combinatorial surface, and rear panel lens another side is concave surface annular first reflecting surface (2), is provided with second reflecting surface (3) at the anter lens annular first plane of refraction center, intracardiac ring edge and second reflecting surface (3) side edge in annular first plane of refraction (1), be provided with second plane of refraction (4) at concave surface annular first reflecting surface (2) center, intracardiac ring edge and second plane of refraction (4) side edge in concave surface annular first reflecting surface (2), when middle sheet lens are multi-disc by that analogy.
6. a kind of multi-sheet type panoramic looking-around imaging lens according to claim 5, it is characterized in that described before, during and after the combination that is combined as crown glass, crown glass and crown glass of sheet lens material or combination or the combination of crown glass, flint glass and flint glass or the combination of flint glass, flint glass and flint glass of crown glass, crown glass and flint glass, built-up sequence is any.
7. a kind of multi-sheet type panoramic looking-around imaging lens according to claim 5, when it is characterized in that described middle sheet lens are multi-disc, middle sheet lens material is the combination in any of crown glass and flint glass.
8. a kind of multi-sheet type panoramic looking-around imaging lens according to claim 5 is characterized in that described multiple different surface type is sphere, is carved with surface, odd aspheric surface or the even aspheric surface of microstructure.
9. a kind of multi-sheet type panoramic looking-around imaging lens according to claim 1 is characterized in that described combinatorial surface is convex surface, concave surface or plane.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100682231A CN100456075C (en) | 2007-04-24 | 2007-04-24 | Multi-sheet type panoramic looking-around imaging lens |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100682231A CN100456075C (en) | 2007-04-24 | 2007-04-24 | Multi-sheet type panoramic looking-around imaging lens |
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| CN101038366A true CN101038366A (en) | 2007-09-19 |
| CN100456075C CN100456075C (en) | 2009-01-28 |
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| CNB2007100682231A Expired - Fee Related CN100456075C (en) | 2007-04-24 | 2007-04-24 | Multi-sheet type panoramic looking-around imaging lens |
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| HU192125B (en) * | 1983-02-08 | 1987-05-28 | Budapesti Mueszaki Egyetem | Block of forming image for centre theory projection adn reproduction of spaces |
| US6373642B1 (en) * | 1996-06-24 | 2002-04-16 | Be Here Corporation | Panoramic imaging arrangement |
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