CN108957706B - 4K laparoscope imaging objective lens - Google Patents
4K laparoscope imaging objective lens Download PDFInfo
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- CN108957706B CN108957706B CN201811057014.1A CN201811057014A CN108957706B CN 108957706 B CN108957706 B CN 108957706B CN 201811057014 A CN201811057014 A CN 201811057014A CN 108957706 B CN108957706 B CN 108957706B
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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
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
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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
Abstract
The invention discloses a laparoscope objective lens with a 4K ultra-high definition imaging function, which sequentially comprises a protective glass window, a negative group cemented lens and a positive group cemented lens from an object side to an image side, wherein the total number of the positive group cemented lens groups is 3. The objective lens structure realizes the imaging functions of achromatism, short focal length and long working distance. The laparoscope objective lens has the advantages of compact structure, less number of pieces, high resolution, large field of view and small distortion.
Description
Technical Field
The invention relates to a laparoscope objective lens, in particular to a laparoscope objective lens with a 4K ultrahigh-definition imaging function.
Background
Laparoscopic surgery is a major mainstream of modern medical development, and has the advantages of light wound, less pain for patients, quick postoperative recovery and the like; meanwhile, the time of hospitalization after operation can be obviously shortened, and the consumption of medical resources can be reduced. Optical imaging is the most critical part of laparoscopic equipment, doctor's operation is completely dependent on images acquired by laparoscope, the definition of the images is directly related to judgment of diseases in operation, identification of tissue structures such as vascular bile duct and the like, and accuracy and precision of operation, and the optical imaging is closely related to the safety of operation as a whole. Therefore, the main trend of the laparoscopic technique is to continuously improve the optical imaging quality. At present, optical imaging has been developed from 1080p high definition to 4K ultrahigh definition, the resolution of a 4K laparoscope image reaches 3840 multiplied by 2160, which is 4 times of 1080p high definition images, clearer organ and tissue details are provided, the positioning accuracy of a focus is improved, and great effects on the improvement of operation quality and safety are achieved.
The laparoscopic objective optical system is a key component of the laparoscope, and is very challenging in optical design, so that high definition is guaranteed, and high-field angle and small-distortion imaging are realized at the same time. The large field angle has obvious effect of expanding the visual field of doctors, and the small distortion further improves the accuracy of the sizes and positions of organs and tissues in the body.
Disclosure of Invention
The invention aims to provide a laparoscope objective lens with 4K ultra-high definition imaging, which has compact structure, less number of pieces, large field of view and small distortion, and can realize the ultra-high definition imaging of about 4K on the specification of a 1/2' image sensor.
The invention relates to a laparoscope objective lens with 4K ultra-high definition imaging, which comprises a lens barrel, wherein a first cemented lens, a first space ring, a second cemented lens, a third cemented lens, a second space ring and a fourth cemented lens are sequentially attached from an object side to an image side in the lens barrel, and a protective glass window can be assembled on the object side of the first cemented lens; wherein, from the object space to the image space, two surfaces of the protective glass window are plane surfaces; the first cemented lens comprises a first negative lens and a first positive lens, wherein the first negative lens faces the object side to be a convex surface, faces the image side to be a concave surface, and the first positive lens faces the object side to be a plane and faces the image side to be a convex surface; the second cemented lens comprises a second positive lens and a second negative lens, wherein both surfaces of the second positive lens are convex, and both surfaces of the second negative lens are concave; the third cemented lens comprises a third negative lens and a third positive lens, wherein both surfaces of the third negative lens are concave surfaces, and both surfaces of the third positive lens are convex surfaces; the fourth cemented lens comprises a fourth negative lens and a fourth positive lens, wherein the fourth negative lens is convex towards the object side, is concave towards the image side, and is convex on both sides.
The protective glass window is made of sapphire, the curvature radius of an object plane is infinite, the mirror distance is 0.80mm, the mirror radius is 2.6510mm, the curvature radius of an image plane is infinite, the mirror distance is 0.20mm, the mirror radius is 2.3471mm, and the lens radius is 3.0mm;
the first negative lens is made of H-ZLAF55D glass material, the convex curvature radius is 33.75mm, the mirror surface distance is 0.60mm, the mirror surface radius is 2.1308mm, the concave curvature radius of the first negative lens is 2.81mm, the mirror surface distance is 0.75mm, the mirror surface radius is 1.6887mm, and the lens radius is 2.4mm;
the first positive lens is made of H-ZLAF55D glass material, the plane curvature radius is infinite, the mirror distance is 11.20mm, the mirror radius is 1.6632mm, the convex curvature radius of the first positive lens is-5.24 mm, the mirror distance is 1.06mm, the mirror radius is 0.8212mm, and the lens radius is 2.75mm;
the lens radius of the first negative lens is 2.4mm larger than the mirror radius 1.6887mm of the concave surface, and a plane is formed at the end face of the concave surface and is glued with the plane of the first positive lens;
the second positive lens is made of H-ZF1 glass material, the curvature radius of the convex surface of the object side is 3.14mm, the mirror surface distance is 1.95mm, the mirror surface radius is 1.0793mm, the curvature radius of the image Fang Tumian is-3.14 mm, and the second positive lens is glued with the concave surface of the object side of the second negative lens; the lens radius of the second positive lens is 2.0mm;
the second negative lens is made of H-ZF72A glass material, the curvature radius of the concave surface of the object side is-3.14 mm, the mirror surface distance is 1.06mm, the mirror surface radius is 1.0522mm, the curvature radius of an image Fang Aomian of the second negative lens is 3.14mm, the mirror surface distance is 0.30mm, the mirror surface radius is 1.2213mm, and the lens radius of the second negative lens is 2.4mm;
the third negative lens is made of H-ZF52 glass material, the curvature radius of the concave surface of the object side is-12.53 mm, the mirror surface distance is 0.60mm, the mirror surface radius is 1.1069mm, the curvature radius of the concave surface of the image side is 7.01mm, and the third negative lens is glued with the convex surface of the object side of the third positive lens;
the third positive lens is made of H-ZPK5 glass material, the curvature radius of the convex surface of the object side is 7.01mm, the mirror surface distance is 1.65mm, the mirror surface radius is 1.2968mm, the curvature radius of the image Fang Tumian is-4.302 mm, the mirror surface distance is 0.15mm, the mirror surface radius is 1.6859mm, and the lens radii of the third negative lens and the third positive lens are 2.4mm;
the fourth negative lens is made of H-LAF4 glass material, the curvature radius of the convex surface of the object side is 10.8mm, the mirror surface distance is 0.67mm, the mirror surface radius is 1.8649mm, the curvature radius of the concave surface of the image side is 3.04mm, and the fourth negative lens is glued with the convex surface of the object side of the fourth positive lens;
the fourth positive lens is made of H-ZPK5 glass material, the curvature radius of the convex surface of the object side is 3.04mm, the mirror surface distance is 2.11mm, the mirror surface radius is 1.9524mm, the curvature radius of an image Fang Tumian is-9.03 mm, the mirror surface distance is 2.49mm, the mirror surface radius is 2.0040mm, and the lens radii of the fourth negative lens and the fourth positive lens are 2.4mm.
In general, the real image surface at the rear end of the laparoscope objective lens is transmitted to the outside of the body through a relay optical system, and the relay optical system is usually 3-5 stages, and the imaging magnification of each stage is 1 time. Thus, the imaging performance of the objective lens determines the imaging performance of the entire laparoscopic optical system. The back end of the relay optical system can be directly imaged by a CMOS or CCD image sensor, an in-vivo image is displayed on a monitor, or a virtual image can be formed by an eyepiece, and the image can be observed by eyes or acquired by an imaging system.
The back end of the relay optical system is used as A1/2' CMOS or CCD image sensor (such as OS08A 10), the image plane size is 7.7mm multiplied by 4.4mm, the pixel size is 2 mu m, and the space cut-off frequency is 250lp/mm. The modulation degree of the laparoscope objective lens in the 0.5 view field range is almost different from the diffraction limit (DIFFRACTION LIMIT), when the modulation degree is 0.26, the spatial frequency value in the 0.5 view field range reaches about 185lp/mm, the pixel resolution of the laparoscope objective lens on a CMOS photosensitive surface reaches 2849 multiplied by 1628, the resolution of the laparoscope objective lens is 3840 multiplied by 2160 which is close to 4K, the laparoscope objective lens is better than 1920 multiplied by 1080 of 1080p, the imaging view field angle reaches 90 degrees, and the distortion rate is about 12%. Therefore, the imaging device has the advantages of high resolution, large field of view and small distortion.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is an optical transfer function of the present invention at a design object distance (35 mm object distance).
Fig. 3 is a distortion curve of the present invention at a design object distance (35 mm object distance).
Detailed Description
The invention is further described below with reference to the drawings.
As shown in fig. 1, the disclosed laparoscopic objective lens with 4K ultra-high definition imaging function comprises a lens barrel (6), wherein a first cemented lens (2), a first space ring (7), a second cemented lens (3), a third cemented lens (4), a second space ring (8) and a fourth cemented lens (5) are sequentially attached from the object side to the image side in the lens barrel (6), and a protective glass window (1) can be assembled on the object side of the first cemented lens (2); wherein, from the object space to the image space, two surfaces of the protective glass window (1) are plane surfaces; the first cemented lens (2) comprises a first negative lens (21) and a first positive lens (22), the first negative lens (21) is convex towards the object side and concave towards the image side, and the first positive lens (22) is plane towards the object side and convex towards the image side; the second cemented lens (3) comprises a second positive lens (31) and a second negative lens (32), the second positive lens (31) faces the object space and the image space and is convex, and the two surfaces of the second negative lens (32) are concave; the third cemented lens (4) comprises a third negative lens (41) and a third positive lens (42), both surfaces of the third negative lens (41) are concave surfaces, and both surfaces of the third positive lens (42) are convex surfaces; the fourth cemented lens (5) includes a fourth negative lens (51) and a fourth positive lens (52), the fourth negative lens (51) being convex toward the object side and concave toward the image side, and both surfaces of the fourth positive lens (52) being convex. The protective glass window (1) is not required to be assembled in the lens cone (6), but is assembled at the end part of the endoscope tube head of the laparoscope according to the whole design of the laparoscope and adopts sapphire glass material to play the roles of sealing and wear prevention.
In this example, the laparoscopic objective has 15 total mirrors, which are defined as follows in order from the object side to the image side: the object plane of the cover glass window 1 is the 1 st mirror plane, the image plane of the cover glass window 1 is the 2 nd mirror plane, the object side convex surface of the first negative lens 21 is the 3 rd mirror plane, the image side concave surface of the first negative lens 21 is the 4 th mirror plane, the object side plane of the first positive lens 22 is the 5 th mirror plane, the image side convex surface of the first positive lens 22 is the 6 th mirror plane, the object side convex surface of the second positive lens 31 is the 7 th mirror plane, the bonding surface of the second positive lens 31 and the second negative lens 32 is the 8 th mirror plane, the image side concave surface of the second negative lens 32 is the 9 th mirror plane, the object side concave surface of the third negative lens 41 is the 10 th mirror plane, the bonding surface of the third negative lens 41 and the third positive lens 42 is the 11 th mirror plane, the image side convex surface of the third positive lens 42 is the 12 th mirror plane, the object side convex surface of the fourth negative lens 51 is the 13 th mirror plane, the bonding surface of the fourth negative lens 51 and the fourth positive lens 52 is the 14 th mirror plane, and the image side convex surface of the fourth positive lens 52 is the 15 th mirror plane. The structural parameters of the 15 mirrors are shown in Table 1:
TABLE 1
When the lens is applied to laparoscopic imaging, the real image surface of the objective lens is transmitted to the outside of the body through a relay optical system, the relay optical system is usually 3-5 stages, and the imaging magnification of each stage is 1 time. Thus, the imaging performance of the objective lens determines the imaging performance of the entire laparoscopic optical system. The back end of the relay optical system can be directly imaged by a CMOS or CCD image sensor, an in-vivo image is displayed on a monitor, or a virtual image can be formed by an eyepiece, and the image can be observed by eyes or acquired by an imaging system.
Fig. 2 and 3 illustrate the photoimaging performance of the present invention.
Fig. 2 calculates the optical transfer function values for five FIELDs of view, 0mm (AXIS), 7mm (0.25 FIELD), 15mm (0.5 FIELD), 25mm (0.8 FIELD) and 35mm (1.0 FIELD,45 °) for different object distances of 35 mm. As can be seen from FIG. 2, the spatial frequency values of all the fields of view can reach more than 150lp/mm when the modulation degree is 0.26. When the modulation degree of the object height of 15mm (0.5 FIELD) is 0.26, the corresponding spatial frequency value is 185lp/mm. Taking a relay optical system rear end 1/2' CMOS or CCD image sensor (such as OS08A 10) as an example, the image plane size is 7.7mm×4.4mm, the pixel size is 2 μm, and the space cut-off frequency is 250lp/mm (which is superior to the space frequency of the objective optical system of the invention). The pixel resolution of the pixel on the CMOS photosurface reaches 2849×1628, and is close to the resolution 3840×2160 of 4K, which is better than the resolution 1920×1080 of 1080 p.
Fig. 3 shows that the distortion of the objective lens of the present invention is about 12% when imaging a target with a height of 35mm at a 35mm object distance, indicating that the imaging field of view can reach 90 °. Therefore, the invention has the imaging advantages of high resolution, large field of view and small distortion.
Claims (2)
1. A laparoscopic objective that possesses 4K superelevation clear imaging function, its characterized in that: the lens comprises a lens barrel (6), wherein the lens barrel (6) consists of a first cemented lens (2), a first space ring (7), a second cemented lens (3), a third cemented lens (4), a second space ring (8) and a fourth cemented lens (5) from the object side to the image side, and a protective glass window (1) can be assembled on the object side of the first cemented lens (2); wherein, from the object space to the image space, two surfaces of the protective glass window (1) are plane surfaces; the first cemented lens (2) consists of a first negative lens (21) and a first positive lens (22), the first negative lens (21) is convex towards the object side and concave towards the image side, and the first positive lens (22) is plane towards the object side and convex towards the image side; the second cemented lens (3) consists of a second positive lens (31) and a second negative lens (32), wherein both surfaces of the second positive lens (31) are convex, and both surfaces of the second negative lens (32) are concave; the third cemented lens (4) consists of a third negative lens (41) and a third positive lens (42), both surfaces of the third negative lens (41) are concave surfaces, and both surfaces of the third positive lens (42) are convex surfaces; the fourth cemented lens (5) is composed of a fourth negative lens (51) and a fourth positive lens (52), the fourth negative lens (51) is convex toward the object side, concave toward the image side, and both surfaces of the fourth positive lens (52) are convex.
2. The laparoscopic objective with 4K ultra-high definition imaging function according to claim 1, wherein:
the protective glass window (1) is made of SAPPHIRE, the curvature radius of an object plane is infinite, the mirror surface distance is 0.80mm, the mirror surface radius is 2.6510mm, the curvature radius of an image plane is infinite, the mirror surface distance is 0.20mm, the mirror surface radius is 2.3471mm, and the lens radius is 3.0mm;
the first negative lens (21) is made of H-ZLAF55D glass material, the curvature radius of the convex surface of the object side is 33.75mm, the mirror surface distance is 0.60mm, the mirror surface radius is 2.1308mm, the curvature radius of an image Fang Aomian of the first negative lens (21) is 2.81mm, the mirror surface distance is 0.75mm, the mirror surface radius is 1.6887mm, and the lens radius is 2.4mm;
the first positive lens (22) is made of H-ZLAF55D glass material, the plane curvature radius is infinite, the mirror distance is 11.20mm, the mirror radius is 1.6632mm, the convex curvature radius of the first positive lens (22) is-5.24 mm, the mirror distance is 1.06mm, the mirror radius is 0.8212mm, and the lens radius is 2.75mm;
the lens radius of the first negative lens (21) is 2.4mm larger than the concave mirror radius 1.6887mm, and a plane is formed at the concave end face and is glued with the plane of the first positive lens (22);
the second positive lens (31) is made of H-ZF1 glass material, the curvature radius of the convex surface of the object side is 3.14mm, the mirror surface distance is 1.95mm, the mirror surface radius is 1.0793mm, the curvature radius of the image Fang Tumian is-3.14 mm, and the second positive lens is glued with the concave surface of the object side of the second negative lens (32); the lens radius of the second positive lens (31) is 2.0mm;
the second negative lens (32) is made of H-ZF72A glass material, the curvature radius of the concave surface of the object side is-3.14 mm, the mirror surface distance is 1.06mm, the mirror surface radius is 1.0522mm, the curvature radius of an image Fang Aomian of the second negative lens (32) is 3.14mm, the mirror surface distance is 0.30mm, the mirror surface radius is 1.2213mm, and the lens radius of the second negative lens (32) is 2.4mm;
the third negative lens (41) is made of H-ZF52 glass material, the curvature radius of the concave surface of the object side is-12.53 mm, the mirror surface distance is 0.60mm, the mirror surface radius is 1.1069mm, the curvature radius of the concave surface of the image side is 7.01mm, and the third negative lens is glued with the convex surface of the object side of the third positive lens (42);
the third positive lens (42) is made of H-ZPK glass material, the curvature radius of the convex surface of the object side is 7.01mm, the mirror surface distance is 1.65mm, the mirror surface radius is 1.2968mm, the curvature radius of the image Fang Tumian is-4.302 mm, the mirror surface distance is 0.15mm, the mirror surface radius is 1.6859mm, and the lens radii of the third negative lens (41) and the third positive lens (42) are 2.4mm;
the fourth negative lens (51) is made of H-LAF4 glass material, the curvature radius of the convex surface of the object side is 10.8mm, the mirror surface distance is 0.67mm, the mirror surface radius is 1.8649mm, the curvature radius of the concave surface of the image side is 3.04mm, and the fourth negative lens is glued with the convex surface of the object side of the fourth positive lens (52);
the fourth positive lens (52) is made of H-ZPK glass material, the curvature radius of the convex surface of the object side is 3.04mm, the mirror surface distance is 2.11mm, the mirror surface radius is 1.9524mm, the curvature radius of the image Fang Tumian is-9.03 mm, the mirror surface distance is 2.49mm, the mirror surface radius is 2.0040mm, and the lens radii of the fourth negative lens (51) and the fourth positive lens (52) are 2.4mm.
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| CN201811057014.1A CN108957706B (en) | 2018-09-11 | 2018-09-11 | 4K laparoscope imaging objective lens |
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| CN108957706A CN108957706A (en) | 2018-12-07 |
| CN108957706B true CN108957706B (en) | 2023-09-26 |
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| CN113616142B (en) * | 2021-08-09 | 2023-08-29 | 浙江天松医疗器械股份有限公司 | 4K nasosinusitis |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101183171A (en) * | 2006-11-15 | 2008-05-21 | 奥林巴斯映像株式会社 | Zoom lens system and electronic image pickup apparatus using the same |
| CN106443987A (en) * | 2015-08-11 | 2017-02-22 | 大立光电股份有限公司 | Optical system for image pickup, image capturing device and electronic device |
| CN108107546A (en) * | 2017-09-29 | 2018-06-01 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN108398772A (en) * | 2018-05-04 | 2018-08-14 | 中山联合光电科技股份有限公司 | High-resolution, small size, big image planes, the varifocal optical system without veiling glare |
| CN208847937U (en) * | 2018-09-11 | 2019-05-10 | 浙江大学 | 4K laparoscope image-forming objective lens |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007051620B4 (en) * | 2007-10-26 | 2010-01-21 | Jos. Schneider Optische Werke Gmbh | Macro lens |
| JP5616535B2 (en) * | 2011-11-09 | 2014-10-29 | 富士フイルム株式会社 | Imaging lens and imaging apparatus |
| KR20140125680A (en) * | 2013-04-19 | 2014-10-29 | 삼성전자주식회사 | Wide angle lens and imaging apparatus employing the same |
-
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101183171A (en) * | 2006-11-15 | 2008-05-21 | 奥林巴斯映像株式会社 | Zoom lens system and electronic image pickup apparatus using the same |
| CN106443987A (en) * | 2015-08-11 | 2017-02-22 | 大立光电股份有限公司 | Optical system for image pickup, image capturing device and electronic device |
| CN108107546A (en) * | 2017-09-29 | 2018-06-01 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN108398772A (en) * | 2018-05-04 | 2018-08-14 | 中山联合光电科技股份有限公司 | High-resolution, small size, big image planes, the varifocal optical system without veiling glare |
| CN208847937U (en) * | 2018-09-11 | 2019-05-10 | 浙江大学 | 4K laparoscope image-forming objective lens |
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