CN114815195A - Large-view-field zoom lens for infrared band - Google Patents
Large-view-field zoom lens for infrared band Download PDFInfo
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- CN114815195A CN114815195A CN202210614470.1A CN202210614470A CN114815195A CN 114815195 A CN114815195 A CN 114815195A CN 202210614470 A CN202210614470 A CN 202210614470A CN 114815195 A CN114815195 A CN 114815195A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/144—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups 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
- G02B13/001—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
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/008—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras designed for infrared light
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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
- G02B13/009—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras having zoom function
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Abstract
The invention relates to a large-view-field zoom lens for an infrared band, which is characterized in that a first lens group, a second lens group, a third lens group and a fourth lens group are sequentially arranged on the same optical axis in sequence from an object space to an image space, wherein the first lens group comprises a plano-concave lens (1), a first convex lens (2) and a plano-convex lens (3) which are sequentially arranged from left to right; the second lens group includes from left to right: a concave lens (4), a first negative meniscus lens (5) and a second convex lens (6); the third lens group comprises a first positive meniscus lens (7) and a second negative meniscus lens (8); the fourth lens group is composed of a third convex lens (9), a fourth convex lens (10) and a positive meniscus lens (11). The zoom ratio of the lens provided by the invention is 10 times, the zooming of a focal length of 0.6mm to 6mm can be realized, the infrared zoom lens has the characteristics of ultra-short focus and large field of view, and the requirement of infrared large-field shooting can be effectively met.
Description
Technical Field
The invention belongs to the technical field of infrared optical imaging, and particularly relates to a large-view-field zoom lens for an infrared band.
Background
The infrared lens is different from visible light in imaging principle, can not be interfered by external environment when in work by utilizing the self thermal radiation imaging principle of a measured object, can still normally work in various extreme and severe environments, and has wider and wider application range because the cost of an uncooled detector is continuously reduced through various technologies in recent years, so that the infrared thermal imaging system is gradually transited from military use to civil use.
The short wave infrared technology is a new field of the current imaging technology, the imaging spectral range is 0.9-1.7 microns, the short wave infrared technology is positioned in three infrared atmospheric windows, the short wave infrared technology has very wide application in the aspects of smoke-permeable marine detection, night vision enhancement, missile satellite defense and the like, and the short wave infrared technology has the advantage that other cameras cannot reach the short wave infrared technology.
The development of the short-wave infrared technology in China is slow, wherein the research and development of the short-wave infrared lens are also in the initial stage, and the zoom ratio of the current short-wave infrared lens is low and cannot meet the requirement of large-field detection.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the large-view-field zoom lens for the infrared band, the zoom ratio is 10 times, the focal length range is changed from 0.6mm to 6mm, and ultra-short focus and large-view-field monitoring can be provided.
In order to achieve the purpose, the invention adopts the technical scheme that:
a large-view-field zoom lens for an infrared band is characterized in that a first lens group, a second lens group, a third lens group and a fourth lens group are sequentially arranged on the same optical axis in an order from an object space to an image space; wherein:
the first lens group comprises a plano-concave lens 1, a first convex lens 2 and a plano-convex lens 3 which are arranged from left to right in sequence;
the second lens group includes from left to right: a concave lens 4, a first negative meniscus lens 5, and a second convex lens 6;
the third lens group includes a first positive meniscus lens 7 and a second negative meniscus lens 8;
the fourth lens group is composed of a third convex lens 9, a fourth convex lens 10 and a second positive meniscus lens 11.
Further, the object surface side of the plano-concave lens 1 is a flat surface, and the image surface side is a concave surface; the object surface side of the first convex lens 2 is a convex surface, and the image surface side is a convex surface; the object surface side of the plano-convex lens 3 is a convex surface, and the image surface side is a plane; the object surface side of the concave lens 4 is a concave surface, and the image surface side is a concave surface; the object plane side of the first negative meniscus lens 5 is a concave surface, and the image plane side is a convex surface; the object surface side of the second convex lens 6 is a convex surface, and the image surface side is a convex surface; the object plane side of the first positive meniscus lens 7 is a concave surface, and the image plane side is a convex surface; the object plane side of the second negative meniscus lens 8 is a concave surface, and the image plane side is a convex surface; the object plane side of the third convex lens 9 is a convex surface, and the image plane side is a convex surface; the object plane side of the fourth convex lens 10 is a convex surface, and the image plane side is a convex surface; the object plane side of the second positive meniscus lens 11 is a convex surface, and the image plane side is a concave surface; and a diaphragm is arranged between the second convex lens 6 and the first positive meniscus lens 7.
Further, materials of the plano-concave lens 1, the first convex lens 2, the plano-convex lens 3, the concave lens 4, the first negative meniscus lens 5, the second convex lens 6, the first positive meniscus lens 7, the second negative meniscus lens 8, the third convex lens 9, the fourth convex lens 10 and the second positive meniscus lens 11 are all made of HPFS7979 fused quartz.
Further, the distance between the plano-concave lens 1 and the first convex lens 2 is 22.468 mm; the distance between the first convex lens 2 and the plano-convex lens 3 is 14.631 mm; the distance between the concave lens 4 and the first negative meniscus lens 5 is 1.433 mm; the distance between the first negative meniscus lens 5 and the second convex lens 6 is 6.874 mm; the distance between the first positive meniscus lens 7 and the second negative meniscus lens 8 is 1.677 mm; the distance between the third convex lens 9 and the fourth convex lens 10 is 0.1 mm; the distance between the fourth convex lens 10 and the second positive meniscus lens 11 is 0.1 mm.
Further, the distance between the first lens group and the second lens group is 0.156-23.253 mm; the distance between the second lens group and the third lens group is 47.866 mm; the distance between the third lens group and the fourth lens group is 19.069-0.1 mm; the distance between the fourth lens group and the image plane is 18.00-22.375 mm.
Further, the spherical radius of the left side of the plano-concave lens 1 is infinite, and the spherical radius of the right side of the plano-concave lens 1 is 18.758 mm; the spherical radius of the left side of the first convex lens 2 is 1140.245mm, and the spherical radius of the right side of the first convex lens 2 is-23.217 mm; the spherical radius of the left side of the plano-convex lens 3 is 20.310mm, and the spherical radius of the right side of the plano-convex lens 3 is infinite; the spherical radius of the left side of the concave lens 4 is-23.575 mm, and the spherical radius of the right side of the concave lens 4 is 1.654 mm; the spherical radius of the left side of the first negative meniscus lens 5 is-1.687 mm, and the spherical radius of the right side of the first negative meniscus lens 5 is-16.169 mm; the spherical radius of the left side of the second convex lens 6 is 11.558mm, and the spherical radius of the right side of the second convex lens 6 is-21.521 mm; the spherical radius of the left side of the first positive meniscus lens 7 is-15.492 mm, and the spherical radius of the right side of the first positive meniscus lens 7 is-10.887 mm; the spherical radius of the left side of the second negative meniscus lens 8 is-7.518 mm, and the spherical radius of the right side of the second negative meniscus lens 8 is-17.180 mm; the spherical radius of the left side of the third convex lens 9 is 1947.443mm, and the spherical radius of the right side of the third convex lens 9 is-29.913 mm; the spherical radius of the left side of the fourth convex lens 10 is 31.836mm, and the spherical radius of the right side of the fourth convex lens 10 is-79.873 mm; the spherical radius of the left side of the second positive meniscus lens 11 is 14.796mm, and the spherical radius of the right side of the second positive meniscus lens 11 is 50.667 mm.
Further, the plano-concave lens 1, the first convex lens 2 and the plano-convex lens 3, the concave lens 4, the first negative meniscus lens 5 and the second convex lens 6, the first positive meniscus lens 7 and the second negative meniscus lens 8, the third convex lens 9, the fourth convex lens 10 and the second positive meniscus lens 11 are all made of spherical glass.
Further, the thicknesses of the plano-concave lens 1, the first convex lens 2, the second convex lens 6, the first positive meniscus lens 7, the second negative meniscus lens 8, the third convex lens 9, the fourth convex lens 10 and the second positive meniscus lens 11 are 5.00 mm; the thicknesses of the plano-convex lens 3, the concave lens 4 and the first negative meniscus lens 5 are 3.00 mm.
Further, in the zoom lens from a short focus state to a long focus state, the distance between the first lens group and the second lens group gradually increases, the distance between the second lens group and the third lens group gradually decreases, the distance between the third lens group and the fourth lens group gradually decreases, and the distance between the fourth lens group and the image plane gradually increases; the effective focal length of the lens varies from 0.599854 to 6 mm.
Further, the maximum radial field of view of the lens is represented as 0.225mm with paraxial imaging height.
Compared with the prior art, the invention has the advantages that: most infrared lenses on the market have longer focal lengths at present and are only suitable for medium and long distance infrared detection, the zoom lens with the infrared waveband and the large view field provided by the invention has the advantages that the zoom ratio can reach ten times, the minimum focal length is 0.6mm, the maximum focal length is 6mm, the view field in an ultrashort focal mode is large, the purpose of large view field detection can be well met, large view field shooting can provide more information during single shooting, and the information acquisition efficiency is improved. The system has great advantages in the aspect of infrared detection in a narrow space, has a large zoom ratio and a large focusing range, and can be suitable for measurement of various distances.
Drawings
FIG. 1 is a schematic view of an optical path of a zoom lens with a large field of view for infrared bands according to the present invention;
FIG. 2-A is a diagram of the optical path provided by the present embodiment at a short focal length of 0.6 mm;
FIG. 2-B is a schematic diagram of the radius of the diffuse spot provided in this embodiment at a short focus of 0.6 mm;
FIG. 2-C is a graph of the optical transfer function provided in this example at 0.6mm short focus;
FIG. 2-D is the field curvature and distortion curve provided by this example at 0.6mm short focus;
FIG. 3-A is a diagram of the optical path provided by the present embodiment at a short focal length of 2.6 mm;
FIG. 3-B is a schematic diagram of the radius of the diffuse spot provided by the present embodiment at a short focus of 2.6 mm;
FIG. 3-C is a graph of the optical transfer function provided by this example at 2.6mm short focus;
FIG. 3-D is the field curvature and distortion curve provided by this example at 2.6mm short focus;
FIG. 4-A is a diagram of the optical path provided by the present embodiment at a short focal length of 6 mm;
FIG. 4-B is a schematic diagram of the radius of the diffuse spot provided in this embodiment at a short focus of 6 mm;
FIG. 4-C is a graph of the optical transfer function provided by this example at a short focus of 6 mm;
fig. 4-D is a field curvature, distortion curve provided by this example at 6mm short focal length.
Wherein: the lens comprises a plane-concave lens 1, a first convex lens 2, a plane-convex lens 3, a concave lens 4, a first negative meniscus lens 5, a second convex lens 6, a first positive meniscus lens 7, a second negative meniscus lens 8, a third convex lens 9, a fourth convex lens 10, a second positive meniscus lens 11 and a diaphragm 12.
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings and examples.
Referring to fig. 1, the present embodiment provides a large-field-of-view zoom lens for an infrared band, including: a first lens group, a second lens group, a third lens group, and a fourth lens group arranged in order from an object side to an image side along an optical axis;
the first lens group provided by this embodiment includes a plano-concave lens 1, a first convex lens 2 and a plano-convex lens 3, which are sequentially arranged from left to right;
the second lens group provided by the present embodiment includes, from left to right: a concave lens 4, a first negative meniscus lens 5, and a second convex lens 6;
the third lens group provided in this embodiment includes a first positive meniscus lens 7 and a second negative meniscus lens 8;
the fourth lens group provided by the present embodiment includes a third convex lens 9, a fourth convex lens 10, and a second positive meniscus lens 11;
the object plane side of the plano-concave lens 1 provided in this embodiment is a flat surface, and the image plane side is a concave surface; the object surface side of the first convex lens 2 is a convex surface, and the image surface side is a convex surface; the object surface side of the plano-convex lens 3 is a convex surface, and the image surface side is a plane; the object plane side of the concave lens 4 is a concave surface, and the image plane side is a concave surface; the object plane side of the first negative meniscus lens 5 is a concave surface, and the image plane side is a convex surface; the object surface side of the second convex lens 6 is a convex surface, and the image surface side is a convex surface; the object plane side of the first positive meniscus lens 7 is a concave surface, and the image plane side is a convex surface; the object plane side of the second negative meniscus lens 8 is a concave surface, and the image plane side is a convex surface; the object plane side of the third convex lens 9 is a convex surface, and the image plane side is a convex surface; the object plane side of the fourth convex lens 10 is a convex surface, and the image plane side is a convex surface; the object plane side of the second positive meniscus lens 11 is a convex surface, and the image plane side is a concave surface; a diaphragm 12 is arranged between the second convex lens 6 and the first positive meniscus lens 7;
materials of the plano-concave lens 1, the first convex lens 2, the plano-convex lens 3, the concave lens 4, the first negative meniscus lens 5, the second convex lens 6, the first positive meniscus lens 7, the second negative meniscus lens 8, the third convex lens 9, the fourth convex lens 10 and the second positive meniscus lens 11 provided by this embodiment are all HPFS7979 fused quartz;
the distance between the plano-concave lens 1 and the first convex lens 2 provided by the embodiment is 22.468 mm; the distance between the first convex lens 2 and the plano-convex lens 3 is 14.631 mm; the distance between the concave lens 4 and the first negative meniscus lens 5 is 1.433 mm; the distance between the first negative meniscus lens 5 and the second convex lens 6 is 6.874 mm; the distance between the first positive meniscus lens 7 and the second negative meniscus lens 8 is 1.677 mm; the distance between the third convex lens 9 and the fourth convex lens 10 is 0.1 mm; the distance between the fourth convex lens 10 and the second positive meniscus lens 11 is 0.1 mm;
the distance between the first lens group and the second lens group provided by the embodiment is 0.156-23.253 mm; the distance between the second lens group and the third lens group is 47.866 mm; the distance between the third lens group and the fourth lens group is 19.069-0.1 mm; the distance between the fourth lens group and the image plane is 18.00-22.375 mm;
the radius of the left spherical surface S2 of the plano-concave lens 1 provided by the present embodiment is infinite, and the radius of the right spherical surface S3 of the plano-concave lens 1 is 18.758 mm; the radius of the left spherical surface S4 of the first convex lens 2 is 1140.245mm, and the radius of the right spherical surface S5 of the first convex lens 2 is-23.217 mm; the radius of the spherical surface S6 on the left side of the planoconvex lens 3 is 20.310mm, and the radius of the spherical surface S7 on the right side of the planoconvex lens 3 is infinite; the radius of the spherical surface S8 on the left side of the concave lens 4 is-23.575 mm, and the radius of the spherical surface S9 on the right side of the concave lens 4 is 1.654 mm; the radius of the spherical surface S10 on the left side of the first negative meniscus lens 5 is-1.687 mm, and the radius of the spherical surface S11 on the right side of the first negative meniscus lens 5 is-16.169 mm; the radius of the spherical surface S12 on the left side of the second convex lens 6 is 11.558mm, and the radius of the spherical surface S13 on the right side of the second convex lens 6 is-21.521 mm; the position S1 is an object plane, the diaphragm 12 is positioned at the position S14, the radius of the spherical surface S15 on the left side of the first positive meniscus lens 7 is-15.492 mm, and the radius of the spherical surface S16 on the right side of the first positive meniscus lens 7 is-10.887 mm; the radius of the spherical surface S17 at the left side of the second negative meniscus lens 8 is-7.518 mm, and the radius of the spherical surface S18 at the right side of the second negative meniscus lens 8 is-17.180 mm; the radius of the spherical surface S19 on the left side of the third convex lens 9 is 1947.443mm, and the radius of the spherical surface S20 on the right side of the third convex lens 9 is-29.913 mm; the radius of the spherical surface S21 on the left side of the fourth convex lens 10 is 31.836mm, and the radius of the spherical surface S22 on the right side of the fourth convex lens 10 is-79.873 mm; the radius of the spherical surface S23 on the left side of the second positive meniscus lens 11 is 14.796 mm; the spherical surface S24 on the right side of the second positive meniscus lens 11 has a radius of 50.667 mm.
The embodiment provides a large-field-of-view zoom lens for an infrared band, which includes: the plano-concave lens 1, the first convex lens 2 and the plano-convex lens 3, the concave lens 4, the first negative meniscus lens 5 and the second convex lens 6, the first positive meniscus lens 7 and the second negative meniscus lens 8, the third convex lens 9, the fourth convex lens 10 and the second positive meniscus lens 11 are all made of spherical glass.
The thickness of the plano-concave lens 1, the first convex lens 2, the second convex lens 6, the first positive meniscus lens 7, the second negative meniscus lens 8, the third convex lens 9, the fourth convex lens 10, and the second positive meniscus lens 11 provided in this embodiment is 5.00 mm; the thicknesses of the plano-convex lens 3, the concave lens 4 and the first negative meniscus lens 5 are 3.00 mm;
in the zoom lens with a large field of view for an infrared band provided by this embodiment, in a process from a short focus state to a long focus state, a distance between the first lens group and the second lens group gradually increases, a distance between the second lens group and the third lens group gradually decreases, a distance between the third lens group and the fourth lens group gradually decreases, and a distance between the fourth lens group and an image plane gradually increases; the effective focal length of the lens varies from 0.599854 to 6 mm.
The performance parameters of the lens system provided by the embodiment are as follows:
the maximum radial field of view of the lens provided by the embodiment is represented by paraxial imaging height of 0.225mm, and the focal length range is 0.6 mm-6 mm; the wavelength is 1550nm, and the total length of the lens is 152.7695-186.35818 mm;
in the infrared-band large-field-of-view zoom lens provided by this embodiment, in a process from short focus to long focus, a distance between the first lens group and the second lens group gradually increases, a distance between the second lens group and the third lens group gradually decreases, a distance between the third lens group and the fourth lens group gradually decreases, and a distance between the fourth lens group and an image plane gradually increases;
the infrared band large-view-field zoom lens provided by the embodiment has the advantages that the zoom ratio can reach ten times, the minimum focal length is 0.6mm, the view field is large, and the purpose of large-view-field detection can be well met.
Claims (10)
1. A large-field-of-view zoom lens for infrared bands is characterized in that: the method comprises the following steps: a first lens group, a second lens group, a third lens group, and a fourth lens group arranged in order from an object side to an image side along an optical axis; wherein:
the first lens group comprises a plano-concave lens (1), a first convex lens (2) and a plano-convex lens (3) which are arranged from left to right in sequence;
the second lens group includes from left to right: a concave lens (4), a first negative meniscus lens (5) and a second convex lens (6);
the third lens group comprises a first positive meniscus lens (7) and a second negative meniscus lens (8);
the fourth lens group includes a third convex lens (9), a fourth convex lens (10), and a second positive meniscus lens (11).
2. The large field of view zoom lens for infrared band as set forth in claim 1, wherein: the object plane side of the plano-concave lens (1) is a plane, and the image plane side of the plano-concave lens is a concave surface; the object plane side of the first convex lens (2) is a convex surface, and the image plane side of the first convex lens is a convex surface; the object surface side of the plano-convex lens (3) is a convex surface, and the image surface side is a plane; the object surface side of the concave lens (4) is a concave surface, and the image surface side is a concave surface; the object plane side of the first negative meniscus lens (5) is a concave surface, and the image plane side is a convex surface; the object plane side of the second convex lens (6) is a convex surface, and the image plane side of the second convex lens is a convex surface; the object plane side of the first positive meniscus lens (7) is a concave surface, and the image plane side is a convex surface; the object plane side of the second negative meniscus lens (8) is a concave surface, and the image plane side is a convex surface; the object plane side of the third convex lens (9) is a convex surface, and the image plane side is a convex surface; the object plane side of the fourth convex lens (10) is a convex surface, and the image plane side of the fourth convex lens is a convex surface; the object plane side of the second positive meniscus lens (11) is a convex surface, and the image plane side of the second positive meniscus lens is a concave surface; and a diaphragm (12) is arranged between the second convex lens (6) and the first positive meniscus lens (7).
3. The large field of view zoom lens for infrared band as set forth in claim 1, wherein: the materials of the plano-concave lens (1), the first convex lens (2), the plano-convex lens (3), the concave lens (4), the first negative meniscus lens (5), the second convex lens (6), the first positive meniscus lens (7), the second negative meniscus lens (8), the third convex lens (9), the fourth convex lens (10) and the second positive meniscus lens (11) are all HPFS7979 fused quartz.
4. The large field of view zoom lens for infrared band as set forth in claim 1, wherein: the distance between the plano-concave lens (1) and the first convex lens (2) is 22.468 mm; the distance between the first convex lens (2) and the plano-convex lens (3) is 14.631 mm; the distance between the concave lens (4) and the first negative meniscus lens (5) is 1.433 mm; the distance between the first negative meniscus lens (5) and the second convex lens (6) is 6.874 mm; the distance between the first positive meniscus lens (7) and the second negative meniscus lens (8) is 1.677 mm; the distance between the third convex lens (9) and the fourth convex lens (10) is 0.1 mm; the distance between the third convex lens (10) and the second positive meniscus lens (11) is 0.1 mm.
5. The large field of view zoom lens for infrared band as set forth in claim 1, wherein: the distance between the first lens group and the second lens group is 0.156-23.253 mm; the distance between the second lens group and the third lens group is 47.866 mm; the distance between the third lens group and the fourth lens group is 19.069-0.1 mm; the distance between the fourth lens group and the image plane is 18.00-22.375 mm.
6. The large field of view zoom lens for infrared band as set forth in claim 1, wherein: the spherical radius of the left side of the plano-concave lens (1) is infinite, and the spherical radius of the right side of the plano-concave lens (1) is 18.758 mm; the spherical radius of the left side of the first convex lens (2) is 1140.245mm, and the spherical radius of the right side of the first convex lens (2) is-23.217 mm; the spherical radius of the left side of the plano-convex lens (3) is 20.310mm, and the spherical radius of the right side of the plano-convex lens (3) is infinite; the spherical radius of the left side of the concave lens (4) is-23.575 mm, and the spherical radius of the right side of the concave lens (4) is 1.654 mm; the spherical radius of the left side of the negative meniscus lens (5) is-1.687 mm, and the spherical radius of the right side of the first negative meniscus lens (5) is-16.169 mm; the spherical radius of the left side of the second convex lens (6) is 11.558mm, and the spherical radius of the right side of the second convex lens (6) is-21.521 mm; the spherical radius of the left side of the first positive meniscus lens (7) is-15.492 mm, and the spherical radius of the right side of the first positive meniscus lens (7) is-10.887 mm; the spherical radius of the left side of the second negative meniscus lens (8) is-7.518 mm, and the spherical radius of the right side of the second negative meniscus lens (8) is-17.180 mm; the spherical radius of the left side of the third convex lens (9) is 1947.443mm, and the spherical radius of the right side of the third convex lens (9) is-29.913 mm; the spherical radius of the left side of the fourth convex lens (10) is 31.836mm, and the spherical radius of the right side of the fourth convex lens (10) is-79.873 mm; the spherical radius of the left side of the second positive meniscus lens (11) is 14.796mm, and the spherical radius of the right side of the second positive meniscus lens (11) is 50.667 mm.
7. The large field of view zoom lens for infrared band as set forth in claim 1, wherein: the lens is characterized in that the plano-concave lens (1), the first convex lens (2), the plano-convex lens (3), the concave lens (4), the first negative meniscus lens (5), the second convex lens (6), the first positive meniscus lens (7), the second negative meniscus lens (8), the third convex lens (9), the fourth convex lens (10) and the second positive meniscus lens (11) are all made of spherical glass.
8. The large field of view zoom lens for infrared band as set forth in claim 1, wherein: the thicknesses of the plano-concave lens (1), the first convex lens (2), the second convex lens (6), the first positive meniscus lens (7), the second negative meniscus lens (8), the third convex lens (9), the fourth convex lens (10) and the second positive meniscus lens (11) are 5.00 mm; the plano-convex lens (3), the concave lens (4) and the first negative meniscus lens (5) are 3.00mm thick.
9. The large field of view zoom lens for infrared band as set forth in claim 1, wherein: in the process from the short focus state to the long focus state, the distance between the first lens group and the second lens group is gradually increased, the distance between the second lens group and the third lens group is gradually reduced, the distance between the third lens group and the fourth lens group is gradually reduced, and the distance between the fourth lens group and the image plane is gradually increased; the effective focal length of the lens varies from 0.599854 to 6 mm.
10. The large field of view zoom lens for infrared band as set forth in claim 1, wherein: the maximum radial field of view of the lens is 0.225mm in paraxial imaging height.
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| CN202210614470.1A CN114815195B (en) | 2022-05-30 | 2022-05-30 | Large-view-field zoom lens for infrared band |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5768029A (en) * | 1995-02-17 | 1998-06-16 | Olympus Optical Co., Ltd. | Zoom lens system |
| JP2008241904A (en) * | 2007-03-26 | 2008-10-09 | Nidec Copal Corp | Zoom lens |
| US20130222920A1 (en) * | 2012-02-28 | 2013-08-29 | Olympus Corporation | Microscope objective lens |
| US20150309290A1 (en) * | 2014-04-25 | 2015-10-29 | Fujifilm Corporation | Zoom lens and imaging apparatus |
| CN111999869A (en) * | 2020-09-23 | 2020-11-27 | 厦门力鼎光电股份有限公司 | Infrared confocal zoom lens |
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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5768029A (en) * | 1995-02-17 | 1998-06-16 | Olympus Optical Co., Ltd. | Zoom lens system |
| JP2008241904A (en) * | 2007-03-26 | 2008-10-09 | Nidec Copal Corp | Zoom lens |
| US20130222920A1 (en) * | 2012-02-28 | 2013-08-29 | Olympus Corporation | Microscope objective lens |
| US20150309290A1 (en) * | 2014-04-25 | 2015-10-29 | Fujifilm Corporation | Zoom lens and imaging apparatus |
| CN111999869A (en) * | 2020-09-23 | 2020-11-27 | 厦门力鼎光电股份有限公司 | Infrared confocal zoom lens |
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| 赵立新: "Monte-Carlo法在空间外热流计算中的应用——空间光学遥感器光学窗口的地球红外辐射分析计算", 《光学精密工程》 * |
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|---|---|
| CN114815195B (en) | 2023-06-13 |
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