CN104305951A - Optical imaging system of small-diameter and wide-angle medical electronic endoscope - Google Patents
Optical imaging system of small-diameter and wide-angle medical electronic endoscope Download PDFInfo
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- CN104305951A CN104305951A CN201410571822.5A CN201410571822A CN104305951A CN 104305951 A CN104305951 A CN 104305951A CN 201410571822 A CN201410571822 A CN 201410571822A CN 104305951 A CN104305951 A CN 104305951A
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- lens
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- minute surface
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00163—Optical arrangements
- A61B1/00174—Optical arrangements characterised by the viewing angles
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
- A61B1/05—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances characterised by the image sensor, e.g. camera, being in the distal end portion
- A61B1/051—Details of CCD assembly
Abstract
An optical imaging system of an ultra-small-diameter and ultra-wide-angle electronic medical endoscope comprises six coaxial spherical refracting lenses and a diaphragm, wherein the first lens, the second lens, the third lens, the diaphragm, the fourth lens, the fifth lens and the sixth lens are sequentially arrayed from an object side to an image side; the first lens is a concave lens; a lens surface, which faces the object side, of the first lens is projected to the image side; a lens surface, which faces the image side, of the first lens is projected to the object side; the second lens is a convex lens; a lens surface, which faces the object side, of the second lens is a plane; a lens surface, which faces the image side, of the second lens is projected to the image side; the third lens is a convex lens; a lens surface, which faces the object side, of the third lens is projected to the object side; a lens surface, which faces the image side, of the third lens is projected to the image side; the fourth lens is a concave lens; a lens surface, which faces the object side, of the fourth lens and a lens surface, which faces the image side, of the fourth lens are projected to the object side; the fifth lens is a convex lens; a lens surface, which faces the object side, of the fifth lens is a plane; a lens surface, which faces the image side, is projected to the image side; the sixth lens is a convex lens; a lens surface, which faces the object side, of the sixth lens is projected to the object side; and a lens surface, which faces the image side, of the sixth lens is projected to the image side. The field angle of the optical imaging system is 100 degrees, the spatial resolution of the optical imaging system is 100lp/mm, and the maximum outer diameter of the optical imaging system is 2mm. The optical imaging system is matched with a CCD (charge coupled device) with the size of 1/10 inches and is superior to an optical imaging system in the prior art. During operation of the optical imaging system, a patient cannot feel painful.
Description
Technical field
The present invention relates to a kind of medical electronic endoscope optical imaging system, particularly relate to the thin footpath Radix Rumicis medical electronic endoscope optical imaging system matched with 1/10 inch CCD.
Background technology
Along with the development of microelectric technique and technique thereof, the pixel of the electrooptical device CCD as imageing sensor in fujinon electronic video endoscope up to hundreds of thousands to millions of, can obtain high-resolution HD image.Medical electronic endoscope is current application Medical Instruments widely.Pathological changes situation in the tissue morphology of human viscera organ, body can be observed directly by endoscope doctor, disease be diagnosed exactly, can also micro-wound surgical operation be carried out.Medical electronic endoscope long service life, simple to operate, when Diagnosis and Treat disease, operator and assistant and other staff, can carry out various operation under the direct-view of monitor, makes the operator of each side can tacit cooperation.
Because fujinon electronic video endoscope adopts cable transmitted image data, when shank inserts body cavity, the misery that soft cable makes patient suffer is less.Except the cable of transmitted image data, the outside dimension of fujinon electronic video endoscope determines patient and suffers painful degree.The core of fujinon electronic video endoscope is mounted in optical imaging system and the CCD image sensor of endoscope distal end, and the hard portion outside dimension of fujinon electronic video endoscope is mainly subject to the restriction of optical imaging system and CCD image sensor external diameter.Make medical electronic endoscope realize ultra-fine footpath, ultra-wide angle and fine definition, need ccd image sensor and little external diameter, ultra-wide angle, the high-resolution optical imaging system of small size, large pixel count.Current CCD product has size 1/8 inch, 1/10 inch, meets the requirement of high-resolution ultra-fine footpath fujinon electronic video endoscope, and fujinon electronic video endoscope optical imaging system also must meet ultra-fine footpath, ultra-wide angle, high-resolution requirement simultaneously.
Summary of the invention
The object of this invention is to provide a kind of thin footpath Radix Rumicis medical electronic endoscope optical imaging system, this optical imaging system is applicable to 1/10 inch CCD, to obtain ultra-fine footpath high-resolution medical electronic endoscope, patient is made to carry out suffering less misery in diagnosis and treatment process in applying electronic endoscope, its angle of visual field reaches the ultra-wide angle of 100 ° simultaneously, is conducive to the diagnosis and treatment of non-blind area.
The technical scheme adopted is:
Thin footpath Radix Rumicis medical electronic endoscope optical imaging system, comprises six coaxial spherical refractors and a diaphragm, is arranged in order from the object side to the image side:
First lens are concavees lens, and focal power is negative value, and light is dispersed through these sheet lens, and this lens face is convex in image space to the face type of object space, the face type towards image space is convex in object space.
Second lens is convex lens, focal power be on the occasion of, light is assembled through these sheet lens, and this lens face is plane to the face type of object space, the face type towards image space is convex in image space.
3rd lens are convex lens, focal power be on the occasion of, light is assembled through these sheet lens, and this lens face is convex in object space to the face type of object space, the face type towards image space is convex in image space.
4th lens are concavees lens, and focal power is negative value, and light is dispersed through these sheet lens, and this lens face to object space and the face type towards image space all convex in object space.
5th lens are convex lens, focal power be on the occasion of, light is assembled through these sheet lens, and this lens face is plane to the face type of object space, the face type towards image space is convex in image space.
Six-element lens is convex lens, focal power be on the occasion of, light is assembled through these sheet lens, and this lens face is convex in object space to the face type of object space, the face type towards image space is convex in image space.
Diaphragm is placed between third and fourth lens.
Six coaxial spherical refractors and a diaphragm of above-mentioned formation ultra-fine footpath ultra-wide angle medical electronic endoscope optical imaging system have 13 faces, first lens face is the first minute surface to the face of object space, first lens face is the second minute surface to the face of image space, second lens face is the 3rd minute surface to the face of object space, second lens face is the 4th minute surface to the face of image space, 3rd lens face is the 5th minute surface to the face of object space, 3rd lens face is the 6th minute surface to the face of image space, diaphragm is the 7th minute surface, 4th lens face is the 8th minute surface to the face of object space, 4th lens face is the 9th minute surface to the face of image space, 5th lens face is the tenth minute surface to the face of object space, 5th lens face is the 11 minute surface to the face of image space, six-element lens is the 12 minute surface towards the face of object space, six-element lens is the 13 minute surface towards the face of image space.
The radius of curvature of 13 minute surfaces, minute surface radius, minute surface spacing, lens glass material structural parameters are as shown in table 1, wherein radius of curvature positive and negative of minute surface is determined according to the regulation of Application Optics or optical system design software zemax, namely face type convex to object space be on the occasion of, convex to image space be negative value.
Table 1
| Minute surface number | Radius of curvature (mm) | This minute surface is to the distance (mm) of next minute surface | Minute surface radius (mm) | Glass material |
| 1 | -3.62 | 0.60 | 1.00 | H-LAK50 |
| 2 | 0.8 | 0.25 | 0.56 | ? |
| 3 | ∞ | 0.64 | 1.00 | ZBAF21A |
| 4 | -1.75 | 0.02 | 1.00 | ? |
| 5 | 13.15 | 0.86 | 1.00 | ZK6 |
| 6 | -1.25 | 0.07 | 1.00 | ? |
| 7 | ∞ | 0.52 | 0.30 | ? |
| 8 | 4.71 | 0.60 | 0.60 | ZF51 |
| 9 | 1.51 | 0.11 | 0.60 | ? |
| 10 | ∞ | 0.70 | 0.80 | H-LAK8A |
| 11 | -1.75 | 0.02 | 0.80 | ? |
| 12 | 3.04 | 0.64 | 1.00 | H-LAK51 |
| 13 | -8.18 | 0.86 | 1.00 | ? |
Medical electronic endoscope optical imaging system of the present invention does not adopt non-spherical lens, and all adopts standard sphere refractor, to be convenient to processing and to debug.
1/10 inch CCD target surface size is 2mm × 2mm, the radius of medical electronic endoscope spherical optics imaging system imaging of the present invention in image planes is 0.96mm, diameter 1.92mm, when 1/10 inch CCD imageing sensor is placed in the image planes of optical imaging system, optical imaging system imaging is inscribed within 1/10 inch CCD.
The maximum outside diameter of medical electronic endoscope optical imaging system of the present invention is that in 2mm(table 1, maximum minute surface radius is 1mm, and maximum gauge is 2mm), much smaller than the requirement of exempting from the 8mm external diameter of anaesthetizing, reach ultra-fine footpath.
Spatial resolution corresponding when optical-modulation transfer function MTF is 0.2 is the ultimate resolution of system, medical electronic endoscope optical imaging system of the present invention is under 100 ° of angles of visual field, ultimate resolution when MTF reaches 0.2 is 100lp/mm, and the ultimate resolution of human eye is no more than 100lp/mm usually, relative to human eye, medical electronic endoscope optical imaging system imaging of the present invention is the picture of high-resolution, and imaging system reaches the ultra-wide angle visual field of 100 °.
The maximum field of view angle of medical electronic endoscope optical imaging system of the present invention is 100 °, and spatial resolution is 100lp/mm, and maximum outside diameter is 2mm, and matches with 1/10 inch CCD, meets the requirement of the medical electronic endoscope of ultra-fine footpath ultra-wide angle high-resolution.
Accompanying drawing explanation
Fig. 1 is the structural representation of medical electronic endoscope optical imaging system of the present invention.
Fig. 2 is the index path of medical electronic endoscope optical imaging system of the present invention.
Fig. 3 is the MTF curve of medical electronic endoscope optical imaging system of the present invention.
Detailed description of the invention
Thin footpath Radix Rumicis medical electronic endoscope optical imaging system, illustrates embodiment of the present invention below in conjunction with accompanying drawing.
As shown in Figure 1, medical electronic endoscope optical imaging system comprises L1, L2, L3, L4, L5, L6 six coaxial spherical refractors and diaphragm 7, they from the object side to the image side followed order be:
First lens L1 is concavees lens, and focal power is negative value, and light is dispersed through first lens L1, and first lens L1 is convex in image space towards the first minute surface 1 of object space, and the second minute surface 2 towards image space is convex in object space.
Second lens L2 is convex lens, focal power be on the occasion of, light is assembled through second lens L2, and second lens L2 is plane towards the 3rd minute surface 3 of object space, the 4th minute surface 4 towards image space is convex in image space.
3rd lens L3 is convex lens, focal power be on the occasion of, light is assembled through the 3rd lens L3, and the 3rd lens L3 is convex in object space towards the 5th minute surface 5 of object space, the 6th minute surface 6 towards image space is convex in image space.
7th minute surface is diaphragm 7.
4th lens L4 is concavees lens, and focal power is negative value, and light is dispersed through the 4th lens L4, and eight minute surface 8 of the 4th lens L4 towards object space and the 9th minute surface 9 towards image space all convex in object space.
5th lens L5 is convex lens, focal power be on the occasion of, light is assembled through the 5th lens L5, and the 5th lens L5 is plane towards the tenth minute surface 10 of object space, the 11 minute surface 11 towards image space is convex in image space.
Six-element lens L6 is convex lens, focal power be on the occasion of, light is assembled through six-element lens L6, and six-element lens L6 is convex in object space towards the 12 minute surface 12 of object space, convex in image space towards image space the 13 minute surface 13.
The radius of curvature of 13 minute surfaces, minute surface radius, minute surface spacing, lens glass material structural parameters are as shown in table 2, the wherein positive and negative regulation meeting Application Optics or optical system design software zemax of the radius of curvature of minute surface, namely face type convex to object space be on the occasion of, convex to image space be negative value.
Table 2
| Minute surface number | Radius of curvature (mm) | This minute surface is to the distance (mm) of next minute surface | Minute surface radius (mm) | Glass material |
| 1 | -3.62 | 0.60 | 1.00 | H-LAK50 |
| 2 | 0.8 | 0.25 | 0.56 | ? |
| 3 | ∞ | 0.64 | 1.00 | ZBAF21A |
| 4 | -1.75 | 0.02 | 1.00 | ? |
| 5 | 13.15 | 0.86 | 1.00 | ZK6 |
| 6 | -1.25 | 0.07 | 1.00 | ? |
| 7 | ∞ | 0.52 | 0.30 | ? |
| 8 | 4.71 | 0.60 | 0.60 | ZF51 |
| 9 | 1.51 | 0.11 | 0.60 | ? |
| 10 | ∞ | 0.70 | 0.80 | H-LAK8A |
| 11 | -1.75 | 0.02 | 0.80 | ? |
| 12 | 3.04 | 0.64 | 1.00 | H-LAK51 |
| 13 | -8.18 | 0.86 | 1.00 | ? |
Medical electronic endoscope optical imaging system of the present invention does not adopt non-spherical lens, and all adopts standard sphere refractor, to be convenient to processing and to debug.
1/10 inch CCD target surface size is 2mm × 2mm.As shown in Figure 2, the radius of medical electronic endoscope spherical optics imaging system imaging of the present invention in image planes 14 is 0.96mm, diameter 1.92mm, when 1/10 inch CCD imageing sensor is placed in the image planes 14 of optical imaging system, imaging is inscribed within 1/10 inch CCD.
The maximum outside diameter of medical electronic endoscope optical imaging system of the present invention is that in 2mm(table 2, maximum minute surface radius is 1mm), much smaller than the requirement of exempting from the 8mm external diameter of anaesthetizing, reach ultra-fine footpath.
When optical-modulation transfer function MTF is 0.2, corresponding spatial resolution is the ultimate resolution of system, as shown in Figure 3, medical electronic endoscope optical imaging system of the present invention is under 100 ° of angles of visual field, ultimate resolution when MTF reaches 0.2 is 100lp/mm, and the ultimate resolution of human eye is no more than 100lp/mm, relative to human eye usually, medical electronic endoscope optical imaging system imaging of the present invention is the picture of high-resolution, and imaging system reaches the ultra-wide angle visual field of 100 °.
The maximum field of view angle of medical electronic endoscope optical imaging system of the present invention is 100 °, spatial resolution is 100lp/mm, maximum outside diameter is that in 2mm(table 2, maximum minute surface radius is 1mm), match with 1/10 inch CCD, meet the requirement of the medical electronic endoscope of ultra-fine footpath ultra-wide angle high-resolution.
Claims (2)
1. ultra-fine footpath ultra-wide angle medical electronic endoscope optical imaging system, is characterized in that: comprise six coaxial spherical refractors and a diaphragm, be arranged in order from the object side to the image side:
First lens L1 is concavees lens, and focal power is negative value, and light is dispersed through first lens L1, and first lens L1 is convex in image space towards first minute surface (1) of object space, and the second minute surface (2) towards image space is convex in object space;
Second lens L2 is convex lens, focal power be on the occasion of, light is assembled through second lens L2, and second lens L2 is plane towards the 3rd minute surface (3) of object space, the 4th minute surface (4) towards image space is convex in image space;
3rd lens L3 is convex lens, focal power be on the occasion of, light is assembled through the 3rd lens L3, and the 3rd lens L3 is convex in object space towards the 5th minute surface (5) of object space, the 6th minute surface (6) towards image space is convex in image space; 7th minute surface is diaphragm (7);
4th lens L4 is concavees lens, and focal power is negative value, and light is dispersed through the 4th lens L4, and eight minute surface (8) of the 4th lens L4 towards object space and the 9th minute surface (9) towards image space all convex in object space;
5th lens L5 is convex lens, focal power be on the occasion of, light is assembled through the 5th lens L5, and the 5th lens L5 is plane towards the tenth minute surface (10) of object space, the 11 minute surface (11) towards image space is convex in image space;
Six-element lens L6 is convex lens, focal power be on the occasion of, light is assembled through six-element lens L6, and six-element lens L6 is convex in object space towards the 12 minute surface (12) of object space, convex in image space towards image space the 13 minute surface (13).
2. ultra-fine footpath according to claim 1 ultra-wide angle medical electronic endoscope optical imaging system, it is characterized in that: 12 minute surfaces of above-mentioned six coaxial spherical refractors and a diaphragm, wherein radius of curvature positive and negative of minute surface is determined according to the regulation of Application Optics or optical system design software zemax, namely face type convex to object space be on the occasion of, convex to image space be negative value.
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| CN201410571822.5A CN104305951B (en) | 2014-10-24 | 2014-10-24 | Thin footpath Radix Rumicis medical electronic endoscope optical imaging system |
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| CN201410571822.5A CN104305951B (en) | 2014-10-24 | 2014-10-24 | Thin footpath Radix Rumicis medical electronic endoscope optical imaging system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1636500A (en) * | 2003-12-26 | 2005-07-13 | 奥林巴斯株式会社 | Endoscope |
| CN1980597A (en) * | 2004-07-05 | 2007-06-13 | 奥林巴斯医疗株式会社 | Electronic endoscope |
| EP2011431A1 (en) * | 2006-04-21 | 2009-01-07 | Olympus Medical Systems Corp. | Endoscope system and lens unit |
| EP2161606A1 (en) * | 2008-09-08 | 2010-03-10 | Olympus Medical Systems Corporation | Endoscopic image pickup unit |
| CN102293622A (en) * | 2011-01-06 | 2011-12-28 | 沈阳理工大学 | Optical imaging system for electronic hysteroscope |
| WO2014034339A1 (en) * | 2012-08-30 | 2014-03-06 | オリンパスメディカルシステムズ株式会社 | Endoscope |
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2014
- 2014-10-24 CN CN201410571822.5A patent/CN104305951B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1636500A (en) * | 2003-12-26 | 2005-07-13 | 奥林巴斯株式会社 | Endoscope |
| CN1980597A (en) * | 2004-07-05 | 2007-06-13 | 奥林巴斯医疗株式会社 | Electronic endoscope |
| EP2011431A1 (en) * | 2006-04-21 | 2009-01-07 | Olympus Medical Systems Corp. | Endoscope system and lens unit |
| EP2161606A1 (en) * | 2008-09-08 | 2010-03-10 | Olympus Medical Systems Corporation | Endoscopic image pickup unit |
| CN102293622A (en) * | 2011-01-06 | 2011-12-28 | 沈阳理工大学 | Optical imaging system for electronic hysteroscope |
| WO2014034339A1 (en) * | 2012-08-30 | 2014-03-06 | オリンパスメディカルシステムズ株式会社 | Endoscope |
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