CN101470251A - Novel wide-angle lens of endoscope - Google Patents
Novel wide-angle lens of endoscope Download PDFInfo
- Publication number
- CN101470251A CN101470251A CNA2007101732115A CN200710173211A CN101470251A CN 101470251 A CN101470251 A CN 101470251A CN A2007101732115 A CNA2007101732115 A CN A2007101732115A CN 200710173211 A CN200710173211 A CN 200710173211A CN 101470251 A CN101470251 A CN 101470251A
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- CN
- China
- Prior art keywords
- lens
- endoscope
- plano
- angle
- novel wide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
Disclosed is a novel wide-angle lens for an endoscope, wherein an object lens of the novel wide-angle lens includes a combination of a uniform plano-convex lens and a Grin lens, and the view angle of the lens is widened by increasing the difference between refractive indexes of the lens center and the lens periphery. The Grin lens is adopted at the lens center while the uniform plano-convex lens is adopted at the periphery from one to two apertures, the refractive index of the uniform plano-convex lens is smaller than the smallest refractive index of the Grin lens, and the periphery of the lens is manufactured non-transparently, thereby preventing stray light generated by light reflecting on the sides of the lens.
Description
Technical field
The present invention relates to a kind of novel wide-angle lens of endoscope.The objective system that promptly is used for endoscope distal end relates to the objective of endoscope of wide-angle specifically, and it can provide broad more visual angle.
Background technology
Endoscope is a kind of optical instrument, till now the history in 200 years has been arranged from its appearance.Along with developing rapidly of advanced science and technology, the kind of endoscope and level have also had the progress of advancing by leaps and bounds, and develop into fujinon electronic video endoscope and ultrasonic electronic mirror from hard tube mirror and fibrescope.The structure of endoscope makes the real image that is produced by the object lens that are positioned at far-end be transferred to the position that is beneficial to observation by the picture transmission eyeglass.Use angle from endoscope, the object lens of endoscope distal end need little on diameter, but also has the ability that in wide visual angle, forms inner focusing, the optical device that comprises a plurality of spherical lenses can provide wide visual range, effectively proofread and correct various aberrations simultaneously, yet use a plurality of external diameters to cause cost to increase considerably less than the result of the spherical lens of 1mm, this is because the relevant therewith polishing to lens, assembling, adjusting and operation cause.
Summary of the invention
In order to overcome the problems referred to above, be considered to object lens low-cost, wide visual angle at the lens that radially have graded index.But the peripheral part of general gradual index lens away from the design load of graded index, therefore can't be used as lens usually basically.Therefore the object lens that novel wide-angle lens of endoscope of the present invention adopted have comprised the combination of even plano-convex lens and gradual index lens, and wherein evenly plano-convex lens has uniform refractive index, and gradual index lens has the refractive index of gradual change diametrically.The objective of the invention is to increase the lens center and on every side between the difference of refractive index, the visual angle that could improve lens like this.What be that the lens center adopts is gradual index lens, and periphery one to two circle adopts even plano-convex lens, and the refractive index of the even plano-convex lens that is adopted is less than the minimum refractive index of gradual index lens.And the peripheral part of lens is made nontransparent, prevent because from the parasitic light that offside reflection produced of lens.
Embodiment
Below the specific embodiment of the present invention is further described:
The object lens that novel wide-angle lens of endoscope of the present invention adopted have comprised the combination of even plano-convex lens and gradual index lens, what wherein adopted the lens center is gradual index lens, periphery one to two circle adopts even plano-convex lens, and the refractive index of the even plano-convex lens that is adopted is less than the minimum refractive index of gradual index lens.And the peripheral part of lens is made nontransparent, prevent because from the parasitic light that offside reflection produced of lens.
Claims (2)
1, a kind of novel wide-angle lens of endoscope, what it is characterized in that the employing of object lens center is gradual index lens, periphery one to two circle adopts even plano-convex lens.
2, novel wide-angle lens of endoscope according to claim 1 is characterized in that the minimum refractive index of the refractive index of the even plano-convex lens that adopted less than gradual index lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101732115A CN101470251A (en) | 2007-12-26 | 2007-12-26 | Novel wide-angle lens of endoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101732115A CN101470251A (en) | 2007-12-26 | 2007-12-26 | Novel wide-angle lens of endoscope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101470251A true CN101470251A (en) | 2009-07-01 |
Family
ID=40827876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101732115A Pending CN101470251A (en) | 2007-12-26 | 2007-12-26 | Novel wide-angle lens of endoscope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101470251A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102282496A (en) * | 2009-07-30 | 2011-12-14 | 奥林巴斯医疗株式会社 | Optical system for endoscope, and endoscope |
| CN112785926A (en) * | 2020-12-31 | 2021-05-11 | 上海天马微电子有限公司 | Cover plate, display panel and manufacturing method of cover plate |
| WO2021120826A1 (en) * | 2019-12-20 | 2021-06-24 | Shenzhen GOODIX Technology Co., Ltd. | Hybrid refractive gradient-index optics for time-of-fly sensors |
-
2007
- 2007-12-26 CN CNA2007101732115A patent/CN101470251A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102282496A (en) * | 2009-07-30 | 2011-12-14 | 奥林巴斯医疗株式会社 | Optical system for endoscope, and endoscope |
| CN102282496B (en) * | 2009-07-30 | 2013-06-19 | 奥林巴斯医疗株式会社 | Optical system for endoscope, and endoscope |
| WO2021120826A1 (en) * | 2019-12-20 | 2021-06-24 | Shenzhen GOODIX Technology Co., Ltd. | Hybrid refractive gradient-index optics for time-of-fly sensors |
| US11543499B2 (en) | 2019-12-20 | 2023-01-03 | Shenzhen GOODIX Technology Co., Ltd. | Hybrid refractive gradient-index optics for time-of-fly sensors |
| CN112785926A (en) * | 2020-12-31 | 2021-05-11 | 上海天马微电子有限公司 | Cover plate, display panel and manufacturing method of cover plate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| DD01 | Delivery of document by public notice |
Addressee: Lin Chujuan Document name: Notification of before Expiration of Request of Examination as to Substance |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090701 |