CN113885178B - Wide-spectrum image space telecentric athermalization optical system - Google Patents
Wide-spectrum image space telecentric athermalization optical system Download PDFInfo
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- DZSYJVXGONVNKA-UHFFFAOYSA-L NIR-1 dye Chemical compound [K+].[K+].C1=CC2=C(S([O-])(=O)=O)C=C(S([O-])(=O)=O)C=C2C(C2(C)C)=C1[N+](CC)=C2C=CC=CC=CC=C1C(C)(C)C2=CC(C(O)=O)=CC=C2N1CCCCS([O-])(=O)=O DZSYJVXGONVNKA-UHFFFAOYSA-L 0.000 description 5
- AUQMGYLQQPSCNH-UHFFFAOYSA-L NIR-2 dye Chemical compound [K+].[K+].C1=CC2=C(S([O-])(=O)=O)C=C(S([O-])(=O)=O)C=C2C(C2(C)C)=C1[N+](CC)=C2C=CC=CC=C1C(C)(C)C2=CC(C(O)=O)=CC=C2N1CCCCS([O-])(=O)=O AUQMGYLQQPSCNH-UHFFFAOYSA-L 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 3
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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
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/005—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having spherical lenses only
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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
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/22—Telecentric objectives or lens systems
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/028—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation
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Abstract
The invention relates to a wide-spectrum image space telecentric athermalization optical system, which consists of a first lens and a second lens with negative diopter, a third lens and a fourth lens with positive diopter, a diaphragm, a fifth lens and a sixth lens with positive diopter, a seventh lens with negative diopter, an eighth lens with positive diopter and a ninth lens which are sequentially arranged along the incidence direction of light rays; the first lens is a meniscus lens, the object plane side is a convex surface, and the image plane side is a concave surface; the second lens is a biconcave lens; the third lens is a meniscus lens, the object plane side is a concave surface, and the image plane side is a convex surface; the fourth lens is a biconvex lens; the fifth lens is a biconvex lens; the sixth lens is a meniscus lens, the object plane side is a concave surface, and the image plane side is a convex surface; the seventh lens is a biconcave lens; the eighth lens is a biconvex lens. The ninth lens is a biconvex lens, or a meniscus lens with a convex object surface side and a concave image surface side. The invention can adapt to the change of the ambient temperature of-50 to 60 ℃ and meet the requirement of large visual field.
Description
Technical Field
The invention belongs to the technical field of optical imaging, and particularly relates to a wide-spectrum image space telecentric athermalization optical system which can be used in an aerospace remote sensing imaging system.
Background
With the increasing wide application of aerospace remote sensing in different fields, an optical imaging module in a remote sensing system is gradually developed towards a large-view-field and broadband direction. Considering that the relative illumination of an image plane is in direct proportion to the square cosine of the field angle of the image side, especially for a large-view-field imaging system, when the field angle of light rays in the image side is large, serious illumination non-uniformity phenomenon is generated, and the telecentric structure of the image side improves the illumination uniformity of the image plane in the field of remote sensing imaging. 400-1000nm is the most commonly used band range in the remote sensing field, and no report on an image space telecentric optical system covering the full band range is seen.
The Chinese patent publication discloses a large-view-field image space telecentric optical system (publication No. CN 102023369A), the applicable wave band of the system is only 900-1000nm, and the view angle is 30.4 degrees; an image space telecentric lens (CN 106054360A) for space discloses an image space telecentric lens, the wave band range is only a visible light wave band, the angle of view is only 16 degrees, and no wide-spectrum large-view-field telecentric lens with visible-near infrared wave band is reported in the prior published literature.
In addition, the use environment in the remote sensing imaging field is complex, the environmental temperature change is large, and the athermalization of the lens can meet the application under different temperature conditions. The design of a wide-spectrum image-space telecentric athermalization optical system becomes a standard configuration requirement in the field of remote sensing imaging.
Disclosure of Invention
The invention aims to solve the technical problem of providing a wide-spectrum image space telecentric athermalization optical system, which is suitable for wide-spectrum imaging with 400-1000nm, has a field angle of greater than 40 degrees, can adapt to temperature change of-50-60 ℃, and meets the high image quality requirement in the field of remote sensing imaging.
In order to solve the technical problems, a wide-spectrum image space telecentric athermalization optical system of the invention is composed of a first lens and a second lens which are sequentially arranged along the incidence direction of light and have negative diopter, a third lens and a fourth lens which have positive diopter, a diaphragm, a fifth lens and a sixth lens which have positive diopter, a seventh lens which have negative diopter, an eighth lens and a ninth lens which have positive diopter; the first lens is a meniscus lens, the object plane side is a convex surface, and the image plane side is a concave surface; the second lens is a biconcave lens; the third lens is a meniscus lens, the object plane side is a concave surface, and the image plane side is a convex surface; the fourth lens is a biconvex lens; the fifth lens is a biconvex lens; the sixth lens is a meniscus lens, the object plane side is a concave surface, and the image plane side is a convex surface; the seventh lens is a biconcave lens; the eighth lens is a biconvex lens.
The ninth lens is a biconvex lens.
The ninth lens is a meniscus lens, the object plane side of the ninth lens is a convex surface, and the image plane side of the ninth lens is a concave surface.
Further, each lens optical surface is spherical.
The first lens 1 to the ninth lens are made of H-ZF52TT, H-ZLAF GT, H-ZK50, ZF7LGT, H-FK95N, H-QK3L, H-ZF3, H-ZK50GT and D-ZF93 in sequence.
The focal length of the first lens is between-270 mm and-75 mm, the focal length of the second lens is between-20 mm and-18 mm, the focal length of the third lens is between 80mm and 2268mm, the focal length of the fourth lens is between 32mm and 40mm, the focal length of the fifth lens is between 15mm and 19.5mm, the focal length of the sixth lens is between 1000mm and 4207mm, the focal length of the seventh lens is between-11 mm and-9 mm, the focal length of the eighth lens is between 17.5mm and 25mm, and the focal length of the ninth lens is between 29mm and 34 mm.
The air space between the first lens and the second lens is between 5.5 and 11.5mm, the air space between the second lens and the third lens is between 2.8 and 5.8mm, the air space between the third lens and the fourth lens is between 0.3 and 2.5mm, the air space between the fourth lens and the fifth lens is between 20.4 and 28.9mm, the air space between the fifth lens and the sixth lens is between 0.9 and 1.2mm, the air space between the sixth lens and the seventh lens is between 0.29 and 1.1mm, the air space between the seventh lens and the eighth lens is between 0.7 and 1.0mm, the air space between the eighth lens and the ninth lens is between 17 and 21.3mm, and the air space between the ninth lens and the image plane is between 9.3 and 15 mm.
The thickness of the first lens is 5.0-8.0 mm, the thickness of the second lens is 1.8-4.7mm, the thickness of the third lens is 3.6-7.2 mm, the thickness of the fourth lens is 3.2-4.3 mm, the thickness of the fifth lens is 2.7-3.5 mm, the thickness of the sixth lens is 2.0-3.5 mm, the thickness of the seventh lens is 1.6-2.0 mm, the thickness of the eighth lens is 2.8-3.4 mm, and the thickness of the ninth lens is 5.0-8.0 mm.
The coverage wave band range of the invention is 400-1000nm, chromatic aberration correction is realized through reasonable optimization selection of surface type parameters, glass materials and the like, a better imaging effect in a wide spectrum range is obtained, the lens structures are all spherical structures which are easy to process, and the glass materials are common materials for domestic Chengdu brightness.
The invention is an image space telecentric system, controls the angle of light rays reaching an image surface from each view field, realizes the uniformity of relative illumination of the image surface to be more than 95 percent, and ensures that the brightness and darkness of images of each view field angle of the detector are uniform.
The invention selects the optical material with proper thermal expansion coefficient to compensate with the lens barrel material (aluminum) under the high and low temperature condition, can adapt to the environmental temperature change of-50 to 60 ℃, does not need human intervention, and can realize higher imaging quality at different temperatures.
The beneficial effects of the invention are that
The invention provides a 400-1000nm wide-spectrum image space telecentric athermalization optical system, which can realize more uniform image surface relative illuminance, can adapt to the environmental temperature change of 50 ℃ below zero to 60 ℃, is suitable for the aerospace remote sensing imaging field, has the lens length of less than 110mm and the weight of less than 35g, can meet the requirement of a large field of view, has the angle of view of more than 40 degrees, and simultaneously meets the requirements of small volume, wide spectrum, good image quality and the like.
Drawings
FIG. 1 is a schematic diagram of a broad spectrum image space telecentric athermalized optical system according to the present invention;
FIG. 2 is a graph showing the relative illuminance distribution of the imaging lens of embodiment 1-1 on the image plane;
Fig. 3 (a), 3 (b) and 3 (c) are MTF transfer function curves of the imaging lens of example 1-1 at a normal temperature of 20 ℃, a low temperature of-50 ℃ and a high temperature of +60 ℃, respectively.
FIG. 4 is a graph showing the relative illuminance distribution of the imaging lens of embodiment 2-1 on the image plane;
FIGS. 5 (a) to 5 (e) are graphs showing MTF transfer functions of the imaging lens of example 2-1, respectively, in the B band (400-500 nm), the G band (520-600 nm), the R band (630-680 nm), the near infrared 1 (780-895 nm) and the near infrared 2 (900-1000 nm) at room temperature of 20 ℃.
FIGS. 6 (a) to 6 (e) are graphs showing MTF transfer functions of the imaging lens of example 2-1, wherein the MTF transfer functions are in the B band (400-500 nm), the G band (520-600 nm), the R band (630-680 nm), the near infrared 1 (780-895 nm) and the near infrared 2 (900-1000 nm) at a low temperature of-50 ℃.
FIGS. 7 (a) to 7 (e) are MTF transfer function curves of the imaging lens of example 2-1, B band (400-500 nm), G band (520-600 nm), R band (630-680 nm), near infrared 1 (780-895 nm) and near infrared 2 (900-1000 nm) at high temperature +60℃.
Detailed Description
The present invention will now be described in further detail with reference to the drawings and examples, it being understood that the specific examples described herein are intended to illustrate the invention only and are not intended to be limiting. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements or interaction relationship between the two elements. The specific meaning of the above terms in the present invention can be understood in detail by those skilled in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below", "beneath" the second feature includes the first feature being "directly under" and obliquely below "the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, for convenience of description and simplicity of operation, and are not meant to indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
As shown in fig. 1, the wide-spectrum image-space telecentric athermalization optical system of the present invention is composed of 9 lenses, including a first lens 1 and a second lens 2 having negative diopter, a third lens 3 and a fourth lens 4 having positive diopter, a diaphragm 10, a fifth lens 5 and a sixth lens 6 having positive diopter, a seventh lens 7 having negative diopter, an eighth lens 8 and a ninth lens 9 having positive diopter, which are sequentially arranged along the light incident direction. The first lens 1 is a meniscus lens, the object plane side is a convex surface, the image plane side is a concave surface, the second lens 2 is a biconcave lens, the third lens 3 is a meniscus lens, the object plane side is a concave surface, the image plane side is a convex surface, and the fourth lens 4 is a biconvex lens; the fifth lens element 5 is a biconvex lens element, the sixth lens element 6 is a meniscus lens element, the object plane side is a concave surface, the image plane side is a convex surface, the seventh lens element 7 is a biconcave lens element, the eighth lens element 8 is a biconvex lens element, and the ninth lens element 9 is a biconvex lens element or a meniscus lens element (in example 1, a biconvex lens element or a meniscus lens element in example 2), wherein the object plane side is a convex surface and the image plane side is a concave surface.
The coverage wave band range of the optical system is 400-1000nm, chromatic aberration correction is realized through reasonable optimization selection of surface type parameters, glass materials and the like, a good imaging effect in a wide spectrum range is obtained, the lens structures are all spherical structures easy to process, and the glass materials are common materials for domestic adult brightness.
The first lens to the eighth lens are made of H-ZF52TT, H-ZLAF GT, H-ZK50, ZF7LGT, H-FK95N, H-QK3L, H-ZF3, H-ZK50GT and D-ZF93 in sequence.
The optical system is an image space telecentric system, the light angle of each view field reaching the image surface is controlled, the uniformity of the relative illuminance of the image surface can be more than 95%, and the brightness uniformity and consistency of the images of each view field angle of the detector are ensured.
The optical system is a athermalized lens, an optical material with a proper thermal expansion coefficient is selected, and the optical material and a lens barrel material (aluminum) are mutually compensated under the high-low temperature condition, so that the optical system can adapt to the environmental temperature change of-50-60 ℃, does not need human intervention, and can realize higher imaging quality at different temperatures.
The optical system can be in a 400-1000nm full-wave band, is suitable for hyperspectral remote sensing imaging, can be provided with a plurality of wave bands, is suitable for multispectral remote sensing imaging, and can realize optimal imaging effects of different wave bands according to the optimal design of utilizing a multiple structure for multispectral application.
Example 1
The embodiment is suitable for full-band imaging of 400-1000nm, and achromatic design is carried out aiming at the full-band imaging.
The focal length of the first lens 1 is-98 to-75 mm, the focal length of the second lens 2 is-20 to-18 mm, the focal length of the third lens 3 is 80 to 110mm, and the focal length of the fourth lens 4 is 36 to 40mm; the focal length of the fifth lens 5 is 15.00-16 mm, the focal length of the sixth lens 6 is 1000-3260 mm, the focal length of the seventh lens 7 is-10 to-9 mm, the focal length of the eighth lens 8 is 22-25 mm, and the focal length of the ninth lens 9 is 29.00-32.00 mm.
The thickness of the first lens 1 is 6.0-8.0 mm, and the interval between the rear surface and the front surface of the second lens 2 is 6.7-7.3 mm; the thickness of the second lens 2 is 2-4.7mm, and the interval between the rear surface and the front surface of the third lens 3 is 2.8-3.4 mm; the thickness of the third lens 3 is 6.000-7.3 mm, and the interval between the rear surface and the front surface of the fourth lens 4 is 0.29-1.0 mm; the thickness of the fourth lens 4 is 3.6-4.3 mm, and the interval between the rear surface and the front surface of the fifth lens 5 is 20.4-28.9 mm; the thickness of the fifth lens 5 is 3.1-3.5 mm, and the interval between the rear surface and the front surface of the sixth lens 6 is 0.9-1.2 mm; the thickness of the sixth lens 6 is 2.03-2.5 mm, and the interval between the rear surface and the front surface of the seventh lens 7 is 0.3-0.5 mm; the thickness of the seventh lens 7 is 1.6-2.0 mm, and the interval between the rear surface and the front surface of the eighth lens 2 is 0.7-1.0 mm; the thickness of the eighth lens 8 is 2.8-3.1 mm, and the interval between the rear surface and the front surface of the ninth lens 9 is 17-18.9 mm; the ninth lens 9 has a thickness of 6.00-8.00 mm and a distance of 9.3-12.2 mm from the image plane 11.
Example 1-1 the basic parameter data for each lens is shown in table 1-1.
TABLE 1-1
Fig. 2 is a graph showing the relative illuminance of the imaging lens of embodiment 1-1 on the image plane, where the relative illuminance is greater than 95% in all fields of view, so that relatively uniform illumination can be achieved.
Fig. 3 shows modulation transfer function curves MTF of the imaging lens of example 1-1 at half angles of view of 0 °,5 °, 11 °, 17 °, and 20 ° under different temperature conditions. The modulation transfer function value MTF of each view field at 110lp/mm under different temperatures is larger than 0.3, the curve is smooth and compact, the chromatic aberration correction is good, the imaging quality is good in all-wave-band full view fields, and the athermalization effect of the lens is good.
Based on the application of the full wave band, the invention also provides the following embodiments, which have good imaging effects.
The basic parameter data for each lens of examples 1-2 are shown in tables 1-2.
TABLE 1-2
The basic parameter data for each lens of examples 1-3 are shown in tables 1-3.
Tables 1 to 3
Example 2
In this embodiment, the thickness and the interval of each lens are adjusted to be applicable to multispectral remote sensing imaging systems with multiple wavebands, so as to meet different specific requirements. Taking five spectrum channels as an example, remote sensing imaging of five spectrum requirements of R (630-680 nm), G (520-600 nm), B (400-500 nm), near infrared 1 (780-895 nm) and near infrared 2 (900-1000 nm) is met by adjusting the thickness and interval of each lens.
The focal length of the first lens 1 is-270 to-209, the focal length of the second lens 2 is-20 to-18, the focal length of the third lens 3 is 750 to 2268, and the focal length of the fourth lens 4 is 32 to 36; the focal length of the fifth lens 5 is 18.30-19.5, the focal length of the sixth lens 6 is 1790.0-4207, the focal length of the seventh lens 7 is-11 to-9.80, the focal length of the eighth lens 8 is 17.5-20.0, and the focal length of the ninth lens 9 is 32.0-34.
The thickness of the first lens 1 is 5-8 mm, and the interval between the rear surface and the front surface of the second lens 2 is 5.5-11.5; the thickness of the second lens 2 is 1.8-2.5 mm, and the interval between the rear surface and the front surface of the third lens 3 is 4.1-5.8 mm; the thickness of the third lens 3 is 4-7.2 mm, and the interval between the rear surface and the front surface of the fourth lens 4 is 0.3-2.5 mm; the thickness of the fourth lens 4 is 3.2-3.7 mm, and the interval between the rear surface and the front surface of the fifth lens 5 is 21.1-23.9 mm; the thickness of the fifth lens 5 is 2.7-3.1 mm, and the interval between the rear surface and the front surface of the sixth lens 6 is 1.0-1.2 mm; the thickness of the sixth lens 6 is 2.1-2.4 mm, and the interval between the rear surface and the front surface of the seventh lens 7 is 0.29-1.1 mm; the thickness of the seventh lens 7 is 1.8-2.0 mm, and the interval between the rear surface and the front surface of the eighth lens 2 is 0.8-0.84 mm; the thickness of the eighth lens 8 is 3.1-3.4 mm, and the interval between the rear surface and the front surface of the ninth lens 9 is 18.8-21.3 mm; the ninth lens 9 has a thickness of 5 to 7mm and a distance from the image plane 11 of 13.6 to 15mm.
The basic parameter data for each lens of example 2-1 is shown in Table 2-1, and is applicable to multispectral imaging in five band regions.
TABLE 2-1
| Lens serial number | Focal length of lens | Lens thickness t/spacing d | Material |
| 1 | -213.84 | 6/5.543 | H-ZF52TT |
| 2 | -18.46 | 1.8/4.459 | H-ZLAF66GT |
| 3 | 758.71 | 6/0.3 | H-ZK50 |
| 4 | 32.76 | 3.279/21.11 | ZF7LGT |
| 5 | 18.36 | 2.737/1.142 | H-FK95N |
| 6 | 1888.5 | 2.365/0.298 | H-QK3L |
| 7 | -9.87 | 1.8/0.805 | H-ZF3 |
| 8 | 17.56 | 3.215/18.873 | H-ZK50GT |
| 9 | 32.10 | 6/14.269 | D-ZF93 |
FIG. 4 is a graph showing the relative illuminance of the imaging lens of embodiment 2-1 at the image plane, where the relative illuminance is greater than 95% in all fields of view, and relatively uniform illumination can be achieved.
Fig. 5, 6 and 7 are graphs of modulation transfer function MTF of the imaging lens of example 2-1 at half field angles of 0 °,5 °,11 °, 17 ° and 20 ° under normal temperature, low temperature and high temperature conditions, respectively. In the graph, the imaging lens has a slightly worse relative effect in the near infrared 1 and near infrared 2 wave bands, but still meets the imaging requirement, the modulation transfer function value MTF is more than 0.2 at 110lp/mm, and the modulation transfer function value MTF of other view fields in other wave bands is more than 0.4 at 110 lp/mm. The MTFs are shown to have a high degree of similarity at different temperature conditions, i.e. the temperature has a substantially negligible effect on the imaging system.
Also, in the case of the sub-band, the following 2 examples are given, with similar effects to those of example 2-1.
The basic parameter data for each lens of example 2-2 is shown in Table 2-2, and is applicable to multispectral imaging in five band regions.
TABLE 2-2
| Lens serial number | Focal length of lens | Lens thickness t/spacing d | Material |
| 1 | -266.1 | 5.11/11.47 | H-ZF52TT |
| 2 | -18.74 | 2/4.13 | H-ZLAF66GT |
| 3 | 854.6 | 7.13/0.3 | H-ZK50 |
| 4 | 35.3 | 3.39/22.7 | ZF7LGT |
| 5 | 19.50 | 3.09/1.24 | H-FK95N |
| 6 | 4206.9 | 2.11/1.06 | H-QK3L |
| 7 | -10.78 | 2/0.84 | H-ZF3 |
| 8 | 19.91 | 3.35/19.46 | H-ZK50GT |
| 9 | 34.03 | 7/13.65 | D-ZF93 |
The basic parameter data for each lens of examples 2-3 are shown in tables 2-3, and are applicable to multispectral imaging in five band regions.
Tables 2 to 3
| Lens serial number | Focal length of lens | Lens thickness t/spacing d | Material |
| 1 | -209.2 | 8.00/6.21 | H-ZF52TT |
| 2 | -19.55 | 2.5/5.75 | H-ZLAF66GT |
| 3 | 2268.2 | 4.00/2.42 | H-ZK50 |
| 4 | 35.42 | 3.66/23.91 | ZF7LGT |
| 5 | 19.24 | 2.93/1.07 | H-FK95N |
| 6 | 1793.7 | 2.28/0.44 | H-QK3L |
| 7 | -10.83 | 2.00/0.83 | H-ZF3 |
| 8 | 19.36 | 3.14/21.3 | H-ZK50GT |
| 9 | 32.59 | 5.00/14.57 | D-ZF93 |
The invention is not limited to the above embodiments, and other system parameters of different wavebands can be obtained according to specific use requirements. The above is a preferred embodiment of the present invention, and all changes made according to the technical solution of the present invention belong to the protection scope of the present invention when the generated functional effects do not exceed the scope of the technical solution of the present invention.
Claims (6)
1. The wide-spectrum image space telecentric athermalization optical system is characterized by comprising a first lens and a second lens which are sequentially arranged along the incidence direction of light and provided with negative diopter, a third lens and a fourth lens which are provided with positive diopter, a diaphragm, a fifth lens and a sixth lens which are provided with positive diopter, a seventh lens which is provided with negative diopter, an eighth lens and a ninth lens which are provided with positive diopter; the first lens is a meniscus lens, the object plane side is a convex surface, and the image plane side is a concave surface; the second lens is a biconcave lens; the third lens is a meniscus lens, the object plane side is a concave surface, and the image plane side is a convex surface; the fourth lens is a biconvex lens; the fifth lens is a biconvex lens; the sixth lens is a meniscus lens, the object plane side is a concave surface, and the image plane side is a convex surface; the seventh lens is a biconcave lens; the eighth lens is a biconvex lens; the first lens to the ninth lens are made of H-ZF52TT, H-ZLAF GT, H-ZK50, ZF7LGT, H-FK95N, H-QK3L, H-ZF3, H-ZK50GT and D-ZF93 in sequence; the focal length of the first lens is between-270 mm and-75 mm, the focal length of the second lens is between-20 mm and-18 mm, the focal length of the third lens is between 80mm and 2268mm, the focal length of the fourth lens is between 32mm and 40mm, the focal length of the fifth lens is between 15mm and 19.5mm, the focal length of the sixth lens is between 1000mm and 4207mm, the focal length of the seventh lens is between-11 mm and-9 mm, the focal length of the eighth lens is between 17.5mm and 25mm, and the focal length of the ninth lens is between 29mm and 34 mm.
2. The broad spectrum image space telecentric athermalized optical system according to claim 1, wherein said ninth lens is a biconvex lens.
3. The telecentric athermalized optical system of claim 1, wherein said ninth lens is a meniscus lens having a convex object plane and a concave image plane.
4. The broad spectrum image space telecentric athermalized optical system of claim 1, wherein each lens optical surface is spherical.
5. The broad spectrum image telecentric athermalization optical system according to claim 1, wherein the air space between the first and second lenses is between 5.5-11.5mm, the air space between the second and third lenses is between 2.8-5.8mm, the air space between the third and fourth lenses is between 0.3-2.5mm, the air space between the fourth and fifth lenses is between 20.4-28.9mm, the air space between the fifth and sixth lenses is between 0.9-1.2mm, the air space between the sixth and seventh lenses is between 0.29-1.1mm, the air space between the seventh and eighth lenses is between 0.7-1.0mm, the air space between the eighth and ninth lenses is between 17-21.3mm, and the air space between the ninth and image plane is between 9.3-15 mm.
6. The telecentric athermalized optical system of the wide spectrum image space according to claim 5, wherein the first lens has a thickness of 5.0-8.0 mm, the second lens has a thickness of 1.8-4.7mm, the third lens has a thickness of 3.6-7.2 mm, the fourth lens has a thickness of 3.2-4.3 mm, the fifth lens has a thickness of 2.7-3.5 mm, the sixth lens has a thickness of 2.0-3.5 mm, the seventh lens has a thickness of 1.6-2.0 mm, the eighth lens has a thickness of 2.8-3.4 mm, and the ninth lens has a thickness of 5.0-8.0 mm.
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| CN114578531B (en) * | 2022-03-11 | 2024-03-12 | 深圳市誉和光学精密刀具有限公司 | Infrared optical system and infrared lens |
| CN114935813B (en) * | 2022-06-01 | 2024-04-26 | 苏州东方克洛托光电技术有限公司 | Visible near infrared compact image space telecentric optical system |
| CN114942516B (en) * | 2022-06-01 | 2024-04-09 | 苏州东方克洛托光电技术有限公司 | Compact image space telecentric optical system |
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