CN217879793U - Panoramic annular optical system - Google Patents
Panoramic annular optical system Download PDFInfo
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- CN217879793U CN217879793U CN202222260104.9U CN202222260104U CN217879793U CN 217879793 U CN217879793 U CN 217879793U CN 202222260104 U CN202222260104 U CN 202222260104U CN 217879793 U CN217879793 U CN 217879793U
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Abstract
The utility model relates to a panoramic annular optical system, which comprises a head unit, a subsequent lens group and a sensor which are arranged in sequence from an object space to an image space; mechanical half-aperture D of object-side surface of first lens PAL1 And radius of curvature R of object-side surface of first lens A1 The following relationship is satisfied:
the second lens is a biconvex lens with a radius of curvature R of the object-side surface A3 Radius of curvature R of image side A4 The following relationship is satisfied:
the first lens comprises a front transmission surface, a front reflection surface and a first rear transmission surface, and the second lens comprises a rear reflection surface and a second rear transmission surface; the subsequent lens group comprises four lenses, and at least one cemented lens is arranged in the subsequent lens group. The utility model discloses, the angle of vision can reach (40 ~ 100 degree) 360, and visible light resolution reaches three million pixels, and the image quality is good, and image stabilization, no stray light satisfy the requirement of clear no parasitic light completely.
Description
Technical Field
The utility model relates to a panorama optical system technical field, concretely relates to panorama clitellum optical system.
Background
The panoramic annular imaging system needs to complete the imaging of an object in an ultra-large view field range onto an image sensor with a limited image surface through geometric transformation at one time to obtain an annular area image of the ultra-large view field, and a circular blind area is arranged in the center of the image.
The ability of imaging objects in an ultra-large view field range onto an image sensor benefits from the ingenious combination of the refraction and reflection surfaces, however, due to the introduction of the reflection surface, the partial reflection of the lens transmission surface and the scattering of the mechanical part structure in the lens barrel, stray light with considerable intensity is easily introduced into the final image surface, the visual observation experience of a system and the work of an image processing algorithm are interfered, and the resistance on the road for automatically driving and updating service robots, video conference lenses and automobiles is greatly possible; meanwhile, larger distortion and stray light are problems of an imaging optical system with an oversized view field.
Disclosure of Invention
An object of the utility model is to provide a panorama clitellum optical system to the realization stably obtains the purpose of clear, stable image in effective field of vision.
In order to achieve the above object, the present invention provides a panoramic annular optical system, which includes a head unit, a subsequent lens group and a sensor sequentially arranged from an object space to an image space, wherein the head unit includes a first lens and a second lens sequentially arranged from the object space to the image space, and the first lens and the second lens have positive focal power;
mechanical semi-aperture D of object side surface of first lens PAL1 And a radius of curvature R of an object-side surface of the first lens A1 The following relationship is satisfied:
the second lens is a biconvex lens, and the curvature radius R of the object side surface of the second lens A3 Radius of curvature R of image side A4 The following relationship is satisfied:
the first lens comprises a front transmission surface, a front reflection surface and a first rear transmission surface, and the second lens comprises a rear reflection surface and a second rear transmission surface;
the subsequent lens group comprises four lenses, and at least one cemented lens is arranged in the subsequent lens group.
According to an aspect of the present invention, the first lens is a meniscus lens, and ABB number ABB1 of the first lens satisfies the following relationship: 40 < ABB1 < 100, and the head unit and the subsequent lens group are both spherical glass lenses.
According to an aspect of the present invention, the minimum half field angle FOV of the panoramic annular belt optical system min The following relationship is satisfied: 25 degree<FOV min <50°。
According to the utility model discloses an aspect, the panorama clitellum optical system's imaging surface on effective pixel area diagonal length half ImgH with the panorama clitellum optical system's effective focal length's absolute value satisfies following relation:
according to an aspect of the invention, the total length TTL of the head unit Head part And total length TTL of the subsequent lens group Successor lens group The following relationship is satisfied:
according to an aspect of the present invention, the mechanical half-bore D of the first lens PAL1 And a mechanical half aperture D of the second lens PAL2 The following relationship is satisfied:
according to an aspect of the present invention, the mechanical half-bore D of the first lens PAL1 And total length of the head unit TTL Head part The following relationship is satisfied:
according to an aspect of the present invention, the following relationship is satisfied by a half ImgH of the diagonal length of the effective pixel region on the imaging surface of the panoramic annular optical system: 1mm woven fabric imgh woven fabric was woven into 2mm.
According to an aspect of the invention, the center thickness TH of the first lens PAL1 And a center thickness TH of the second lens PAL2 The following relationship is satisfied:
according to an aspect of the present invention, the first lens has a radius of curvature R of its object side surface A1 Image side curvature radius R A2 The following relationship is satisfied:
according to the utility model discloses a scheme, the utility model discloses a panorama clitellum optical system, through reasonable configuration the mechanical half bore and the curvature radius of first lens and second lens, the angle of vision can reach (40 ~ 100 degree) 360, and visible light resolution reaches three million pixels, and the image quality is good, and image stabilization, no stray light satisfy the requirement of clear no parasitic light completely.
According to the utility model discloses a scheme, the utility model discloses a panorama clitellum optical system can minimize the physical dimension of the central blind area of image of girdle shape, for scene identification service provides great thing side observation scope, and then improves the observation efficiency of single formation of image.
According to the utility model discloses a scheme, the utility model discloses a panorama clitellum optical system forms images to the image planes with bigger thing space scope through panorama clitellum optical system, improves the observation efficiency of single formation of image to a certain extent, provides more effectual thing space information.
According to the utility model discloses a scheme, the utility model discloses a panorama clitellum optical system, when head total length is fixed, the total length of effectively restricting successor battery of lens, the total length of compression whole optical system is favorable to panorama clitellum optical system's miniaturization, light-duty and low cost have portable's characteristics.
According to the utility model discloses a scheme, the utility model discloses a panorama clitellum optical system, the bore collocation of two lenses of panorama clitellum head unit are in reasonable scope, are favorable to realizing the deflection to big angle of vision light, have also guaranteed the machinability of lens simultaneously, and the head unit is under reasonable physical shape, is favorable to the stability under the fixed and operating condition of product installation.
According to the utility model discloses a scheme, the utility model discloses a panorama clitellum optical system guarantees panorama clitellum optical system matches with most image sensors on the market, realizes higher formation of image resolution.
According to the utility model discloses a scheme, the utility model discloses a panorama clitellum optical system makes first lens and second lens combine together organically, and light is high-efficient catadioptric in head unit, rectifies the aberration when increasing the formation of image angle of vision.
Drawings
Fig. 1 is a stray light path in the panoramic annular optical system of the present invention;
FIG. 2 is an optical block diagram of a preferred embodiment of the present invention;
fig. 3 is a labeled view of the various surfaces along the direction of the optical path in a preferred embodiment of the invention.
FIG. 4 is a graph of MTF in the visible 486-656nm of the preferred embodiment of the present invention;
FIG. 5 is a standard dot plot of a preferred embodiment of the present invention in the visible range of 486-656 nm;
FIG. 6 is a distortion plot of the preferred embodiment of the present invention in the visible light range of 486-656 nm;
FIG. 7 is a graph of the optical path difference of the preferred embodiment of the present invention under the 486-656nm visible light;
FIG. 8 is a diagram of chromatic aberration of magnification under 486-656nm of visible light in accordance with a preferred embodiment of the present invention;
FIG. 9 is a graph of relative illuminance at 486-656nm for a preferred embodiment of the present invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that in the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. Features, principles and other aspects of the present invention will be described in detail below with reference to the drawings and in conjunction with embodiments.
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, which are not described herein in detail, but the present invention is not limited to the following embodiments.
Referring to fig. 1 to 9, the present invention provides a panoramic annular optical system, including a head unit, a subsequent lens set and a sensor arranged in sequence from an object space to an image space, wherein the head unit includes a first lens PAL1 and a second lens PAL2 arranged in sequence from the object space to the image space, the first lens PAL1 is a meniscus lens, and the curvature radius R of the object side surface of the first lens PAL1 is a radius of curvature R of the object side surface thereof A1 Radius of curvature R of image side A2 Satisfies the following conditions:
the second lens PAL2 is a biconvex lens, and the curvature radius R of the object side surface of the second lens PAL2 A3 Radius of curvature R of image side A4 The following relationship is satisfied:
the subsequent lens group comprises four lenses, and at least one cemented lens is arranged in the subsequent lens group;
the first lens PAL1 includes a front transmission surface A1, a front reflection surface A6, and a first rear transmission surface A2, and the second lens PAL2 includes a rear reflection surface A3, a second rear transmission surface A8.
By arranging the first lens PAL1, the second lens PAL2, the subsequent lens group and the sensor, the first lens PAL1 comprises a front transmission surface A1, a front reflection surface A6 and a first rear transmission surface A2, the second lens PAL2 comprises a rear reflection surface A3 and a second rear transmission surface A8, and by reasonably configuring the mechanical half aperture and the curvature radius of the first lens PAL1 and the curvature radius of the second lens PAL2, the field angle can reach (40-100 degrees) multiplied by 360 degrees, the visible light resolution reaches three million pixels, the image quality is good, the image is stable, no stray light exists, and the requirements of clearness and no stray light are completely met.
In an embodiment of the present invention, preferably, the first lens PAL1 and the second lens PAL2 have positive powers, and abbe number ABB1 of the first lens PLA1 satisfies the following relationship: ABB1 is more than 40 and less than 100, and the head unit and the subsequent lens group are spherical glass lenses.
In one embodiment of the present invention, preferably, the minimum half field angle FOV of the panoramic annular optical system min The following relationship is satisfied: 25 degree<FOV min <50 degrees, can minimize the physical dimension of the central blind area of the annular imaging image, provide a larger object observation range for scene recognition service, and further improve the observation efficiency of single imaging.
In an embodiment of the present invention, preferably, the half ImgH of the diagonal length of the effective pixel area on the imaging plane of the panoramic annular optical system and the absolute value of the effective focal length of the panoramic annular optical system satisfy the following relationship:
through reasonably configuring half of the diagonal length of the effective pixel area on the imaging surface of the panoramic annular optical system and the absolute value of the effective focal length of the panoramic annular optical system, a larger object space range can be imaged on the image surface, the observation efficiency of single imaging is improved to a certain extent, and more effective object space information is provided.
In one embodiment of the present invention, the total length TTL of the head unit is preferably Head part And total length TTL of succeeding lens group Rear broken lens group The following relationship is satisfied:
when the total length of the head is constant, the total length of the subsequent lens group is effectively limited, the total length of the whole optical system is compressed, the miniaturization, the light weight and the low cost of the panoramic annular optical system are facilitated, and the portable panoramic annular optical system has the characteristic of convenience in carrying.
In an embodiment of the present invention, preferably, the mechanical half-bore D of the first lens PAL1 PAL1 And mechanical half-bore D of the second lens PAL2 PAL2 The following relationship is satisfied:
in an embodiment of the present invention, preferably, the mechanical half-bore D of the first lens PAL1 PAL1 And total length of head unit TTL Head part The following relationship is satisfied:
the reasonable configuration of the calibers of the two lenses of the head unit of the panoramic annular belt is beneficial to realizing deflection of rays with large field angle, and simultaneously, the machinability of the lenses is ensured, and the head unit is beneficial to the installation and fixation of products and the stability of the head unit in a working state under a reasonable physical shape.
In an embodiment of the present invention, preferably, half of the diagonal length of the effective pixel region on the imaging plane of the panoramic annular optical system satisfies the following relationship: 1mm and im gH are all-woven (2mm).
The diagonal length of the effective pixel area on the imaging surface of the panoramic annular optical system is reasonably set, so that the panoramic annular optical system can be matched with most of sensors on the market, and higher imaging resolution is realized.
In one embodiment of the present invention, preferably, the center thickness TH of the first lens PAL1 PAL1 And the center thickness TH of the second lens PAL2 PAL2 The following relationship is satisfied:
by properly configuring the central thicknesses of the first lens PAL1 and the second lens PAL2, and organically combining the first lens PAL1 and the second lens PAL2, light rays are efficiently refracted and reflected in the head unit, and aberration is corrected while increasing the imaging angle of view.
In an embodiment of the present invention, preferably, the object side surface of the first lens PAL1 has a mechanical half-bore D PAL1 And the radius of curvature R of the object side of the first lens PAL1 A1 The following relationship is satisfied:
in an embodiment of the present invention, preferably, the first lens PAL1 and the second lens PAL2 are glued together, the first lens PAL1 includes a front transmission surface A1, a front reflection surface A6 and a first rear transmission surface A2, and the second lens PAL2 includes a rear reflection surface A3 and a second rear transmission surface A8.
The subsequent lens group comprises four lenses, the third lens RL1 is a single lens, the front surface B1 of the third lens RL1 is a transmission surface, and the rear surface B2 is a transmission surface; the fourth lens RL2 is a single lens, the front surface C1 of the fourth lens RL2 is a transmission surface, and the rear surface C2 is a transmission surface; the fifth lens RL3 and the sixth lens RL4 are cemented together. The front surface D1 is a transmission surface, the back surface D3 is a transmission surface, and the middle transmission gluing surface D2; the front surface of the sensor is provided with protective glass, the front surface of the sensor is provided with an image plane E1, and the rear surface of the sensor is provided with an image plane E2; incident light is refracted and incident from the front transmission surface A1, is reflected to the front reflection surface A6 through the front transmission surface A3, is reflected by the front reflection surface A6 and then is refracted by the second rear transmission surface A8 and then is emitted, the emitted light is converged to the sensor through the rear group of refraction lenses, and the photosensitive imaging chip of the sensor can be Smartsens SOC301loT CMOS.
Referring to fig. 2 to 9, in the preferred embodiment of the present invention, the relevant parameters of each lens of the panoramic annular optical system are shown in table 1 below, including the radius of curvature, the center thickness, the refractive index, the abbe number, and the effective semi-aperture.
TABLE 1
Wherein, A1 and A5 are the same plane, A2, A4 and A7 are the same plane, the focal length of the first lens PAL1 is 648.537mm, the focal length of the second lens PAL2 is 12.3608mm, the focal length of the third lens RL1 is-29.2038 mm, the focal length of the fourth lens RL2 is 8.98234mm, the focal length of the fifth lens RL3 is 30.098mm, and the focal length of the sixth lens RL4 is-5.33858 mm.
In example 1, specific data of the structural composition of the panoramic annular optical system are shown in table 2 below.
TABLE 2
The utility model discloses a panorama clitellum optical system, through setting up first lens PAL1, second lens PAL2, successor lens group and sensor, first lens PAL1 includes preceding transmission face A1, preceding reflection plane A6 and first back transmission face A2, second lens PAL2 includes back reflection face A3, transmission face A8 behind the second, and through the mechanical half bore and the radius of curvature of the first lens PAL1 of reasonable configuration and the radius of curvature of second lens PAL2, the angle of view can reach (40 ~ 100 degree) 360 x, visible light resolution reaches three million pixels, the image quality is good, stable, no stray light, satisfy the clear requirement of no stray light completely.
In the present application, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The above description is only one embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A panoramic annulus optical system comprising a head unit, a subsequent lens group and a sensor arranged in order from an object side to an image side, characterized in that the head unit comprises a first lens (PAL 1) and a second lens (PAL 2) arranged in order from the object side to the image side, the first lens (PAL 1) and the second lens (PAL 2) having positive optical power;
a mechanical half-aperture D of the object-side face of the first lens (PAL 1) PAL1 And a radius of curvature R of the object side of said first lens (PAL 1) A1 The following relationship is satisfied:
the second lens (PAL 2) is a biconvex lens, the radius of curvature R of the object side of the second lens (PAL 2) A3 Radius of curvature R of image side surface A4 The following relationship is satisfied:
the first lens (PAL 1) comprises a front transmissive surface (A1), a front reflective surface (A6) and a first rear transmissive surface (A2), and the second lens (PAL 2) comprises a rear reflective surface (A3), a second rear transmissive surface (A8);
the subsequent lens group comprises four lenses, and at least one cemented lens is arranged in the subsequent lens group.
2. The panoramic annular zone optical system according to claim 1, characterized in that the first lens (PAL 1) is a meniscus lens, the abbe number ABB1 of the first lens (PAL 1) satisfying the following relation: 40 < ABB1 < 100, and the head unit and the subsequent lens group are both spherical glass lenses.
3. The panoramic annular optical system according to claim 1, characterized in that the minimum half field angle FOV of the panoramic annular optical system min The following relationship is satisfied: 25 degree<FOV min <50°。
4. The panoramic annular optical system according to claim 1, wherein ImgH, which is half the diagonal length of the effective pixel area on the imaging plane of the panoramic annular optical system, and the absolute value | f | of the effective focal length of the panoramic annular optical system satisfy the following relationship:
5. the panoramic annular zone optical system according to claim 1, characterized in that the total length TTL of the head unit Head part And total length TTL of the subsequent lens group Successor lens group The following relationship is satisfied:
6. the panoramic annulus optical system according to claim 1, characterized in that the mechanical half-aperture D of the first lens (PAL 1) PAL1 And a mechanical half-aperture D of said second lens (PAL 2) PAL2 The following relationship is satisfied:
7. the panoramic annulus optical system according to claim 1, characterized in that the mechanical half aperture of the first lens (PAL 1)D PAL1 And total length of the head unit TTL Head part The following relationship is satisfied:
8. the panoramic annular optical system according to claim 1, wherein ImgH, which is half the diagonal length of the effective pixel area on the imaging plane of the panoramic annular optical system, satisfies the following relationship: 1mm woven fabric imgh woven fabric was woven into 2mm.
9. The panoramic annular zone optical system according to claim 1, characterized in that the first lens (PAL 1) has a central thickness TH PAL1 And a center thickness TH of the second lens (PAL 2) PAL2 The following relationship is satisfied:
10. the panoramic annular zone optical system according to claim 1, characterized in that the first lens (PAL 1) has an object side radius of curvature R A1 Image side curvature radius R A2 The following relationship is satisfied:
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222260104.9U CN217879793U (en) | 2022-08-26 | 2022-08-26 | Panoramic annular optical system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222260104.9U CN217879793U (en) | 2022-08-26 | 2022-08-26 | Panoramic annular optical system |
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| CN217879793U true CN217879793U (en) | 2022-11-22 |
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| CN202222260104.9U Active CN217879793U (en) | 2022-08-26 | 2022-08-26 | Panoramic annular optical system |
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- 2022-08-26 CN CN202222260104.9U patent/CN217879793U/en active Active
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