CN100356223C - Imaging lens - Google Patents
Imaging lens Download PDFInfo
- Publication number
- CN100356223C CN100356223C CNB031141609A CN03114160A CN100356223C CN 100356223 C CN100356223 C CN 100356223C CN B031141609 A CNB031141609 A CN B031141609A CN 03114160 A CN03114160 A CN 03114160A CN 100356223 C CN100356223 C CN 100356223C
- Authority
- CN
- China
- Prior art keywords
- lens
- absorption means
- imaging lens
- lens barrel
- imaging
- 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
The present invention relates to an imaging lens which comprises a lens, a lens barrel and a light absorption device, wherein the lens barrel is used for accommodating and holding the lens; the light absorbing device and the lens are arranged inside the lens barrel along the incidence direction; the light absorption device is made of a black material and is provided with an inner cavity. The imaging lens of the present invention is applied to optical imaging devices, such as cameras, etc., and has better optical property and can effectively weaken stray light signals entering the lens barrel.
Description
[technical field]
The invention relates to a kind of imaging lens, refer to a kind of imaging lens that is applied to optical imaging apparatus such as camera especially.
[background technology]
Imaging lens is used for object is clearly imaged in light-sensitive surface, is one of most important components of optical imaging apparatus such as camera, and the quality of its image quality directly determines the operating characteristic of above-mentioned imaging device.
See also Fig. 1, existing imaging lens 80 generally includes a plurality of lens 81, lens barrel 82 and diaphragm 83, and lens barrel 82 is used to accommodate and a plurality of lens 81 of fixing, and it is normally made by rigid material (as metal), and diaphragm 83 is used to be defined as the picture scope.During actual the use, because of too much parasitic light signal 90 by diaphragm 83 and be incident in the lens barrel 82, it causes image quality to descend through the substandard imaging surface 84 that reflexes to repeatedly.The inside surface of the lens barrel 82 of existing imaging lens 80 can apply blackwash usually, is used to absorb catoptrical energy and transfers to imaging surface 84 and improve image quality with the reduction reflected light.But, black rough surface in the lens barrel 82 only can the absorption portion incident optical signal, the black rough surface generation diffuse reflection (see also Fig. 2) of remainder light signal in lens barrel 82, again through the substandard imaging surface 84 that reflexes to repeatedly, its light intensity is still bigger, and it is limited to cause image quality to improve degree.
[summary of the invention]
Technical matters to be solved by this invention is to provide a kind of imaging lens, and it is better that it can effectively weaken the parasitic light signal and the optical property that are incident in the lens barrel.
Imaging lens of the present invention, it comprises lens, lens barrel and absorption means.Wherein, this lens barrel is used to accommodate and these lens of fixing, and this absorption means and lens are set in turn in the lens barrel along incident direction, its inner tool opening structure.
Compare with existing imaging lens, the present invention is provided with the tool opening structure in lens barrel absorption means is used to be absorbed into the parasitic light signal that is incident upon in the lens barrel, and repeatedly reflection promptly can take place in the hole on the surface that incident ray exposes to this absorption means.Simultaneously, owing to absorption means is made by the black material of the stronger light absorbing characteristic of tool, so the parasitic light signal in the inner every reflection of absorption means once just has the part light intensity to be absorbed.Therefore, by said apparatus, imaging lens of the present invention can effectively weaken the light intensity that the parasitic light signal finally arrives imaging surface, thereby improves image quality.
[description of drawings]
Fig. 1 is the inner structure and the light path synoptic diagram of existing imaging lens.
Fig. 2 is the light path synoptic diagram that parasitic light is incident to the lens barrel inwall of existing imaging lens.
Fig. 3 is inner structure and the light path synoptic diagram of imaging lens first embodiment of the present invention.
Fig. 4 is the inner structure synoptic diagram of the absorption means of imaging lens of the present invention.
Fig. 5 is the light path synoptic diagram of the parasitic light absorption means that is incident to imaging lens of the present invention.
Fig. 6 is inner structure and the light path synoptic diagram of imaging lens second embodiment of the present invention.
Fig. 7 is the synoptic diagram that the surperficial tool wedge shape of the absorption means of imaging lens of the present invention caves in.
[embodiment]
See also Fig. 3, imaging lens 10 first embodiment of the present invention comprise a plurality of lens 11, lens barrel 12, diaphragm 13 and a plurality of absorption means 14, the inside of lens barrel 12 is accommodated and be immobilizated in to a plurality of lens 11, lens barrel 12 is to be made by rigid material (as metal), diaphragm 13 is arranged at before a plurality of lens 11 and the absorption means 14, is used to be defined as the picture scope.
See also Fig. 4 simultaneously, absorption means 14 is arranged at lens barrel 12 inwalls, and with lens 11 close proximity, make by black material, and its inner tool opening structure, this absorption means 14 is a plurality of annular lugs that are arranged at lens barrel 12 inwalls.
See also Fig. 5, during use, when parasitic light signal 60 by diaphragm 13 and be incident in the lens barrel of imaging lens 10, its inwall reflection through lens barrel 12 is gone forward side by side into absorption means 14, because absorption means 14 is made by black material and its inner tool opening structure, parasitic light signal 60 will enter the inside of absorption means 14, and be limited in absorption means 14 inside and repeatedly reflection takes place, again because the stronger light absorbing characteristic of black material tool, so parasitic light signal 60 in absorption means 14 inner every reflections once, just there is the part light intensity to be absorbed, pass through said process, absorption means 14 can absorb most of light intensity of parasitic light signal 60, effectively weakens the parasitic light signal 60 final light intensity that arrive imaging surface 15, thereby improves image quality.
See also Fig. 6, imaging lens 10 second embodiment of the present invention comprise a plurality of lens 11, lens barrel 12, diaphragm 13 and absorption means 16.The inside of lens barrel 12 is accommodated and be retained on to a plurality of lens 11, and lens barrel 12 is to be made by rigid material (as metal), and diaphragm 13 is arranged at before a plurality of lens 11 and the absorption means 16, is used to be defined as the picture scope.
Absorption means 16 is to be made and its inner tool opening structure by black material, is arranged at the inwall of lens barrel 12, and is uniformly distributed in the inner wall surface of lens barrel 12.
During use, when parasitic light signal 60 by diaphragm 13 and be incident in the lens barrel 12 of imaging lens 10, it directly acts on the absorption means 16 that is arranged at lens barrel 12 inwalls, identical with first embodiment of the invention, absorption means 16 can absorb most of light intensity of parasitic light signal 60, effectively weaken the parasitic light signal 60 final light intensity that arrive imaging surface 15, thereby improve image quality.
Be appreciated that imaging lens 10 of the present invention is not subjected to the number of lenses quantitative limitation.In addition, for further improving the light absorpting ability of absorption means 14,16, a plurality of wedge shape depression 161 (seeing also Fig. 7) can be set on the surface of absorption means 14,16, when parasitic light signal 60 is incident to absorption means 14,16, most of light intensity enters absorption means 14,16 inside and is absorbed, the light intensity that all the other small parts do not enter absorption means 14,16 inside will be limited in also being come back reflective until being absorbed in the wedge shape depression 161, by said process, can further improve the image quality of imaging lens 10 of the present invention.
Claims (9)
1. an imaging lens comprises lens, accommodates the also lens barrel and the absorption means of the described lens of fixing, it is characterized in that this absorption means is arranged at the lens barrel inwall, its inner tool opening structure.
2. imaging lens as claimed in claim 1 is characterized in that this absorption means is to be made by black material.
3. imaging lens as claimed in claim 2 is characterized in that this absorption means is the annular lug that is arranged at the lens barrel inwall.
4. imaging lens as claimed in claim 2 is characterized in that this absorption means is uniformly distributed in the lens barrel inwall.
5. as claim 3 or 4 described imaging lens, it is characterized in that the surface of this absorption means is provided with a plurality of wedge shape depressions.
6. imaging lens as claimed in claim 3 is characterized in that the edge of this absorption means and lens leans.
7. imaging lens as claimed in claim 1 is characterized in that this imaging lens further comprises a diaphragm.
8. imaging lens as claimed in claim 7, it is characterized in that this diaphragm is arranged at lens and absorption means before.
9. imaging lens as claimed in claim 1 is characterized in that this lens barrel is to be made by rigid material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031141609A CN100356223C (en) | 2003-04-04 | 2003-04-04 | Imaging lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031141609A CN100356223C (en) | 2003-04-04 | 2003-04-04 | Imaging lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1536383A CN1536383A (en) | 2004-10-13 |
| CN100356223C true CN100356223C (en) | 2007-12-19 |
Family
ID=34320119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031141609A Expired - Fee Related CN100356223C (en) | 2003-04-04 | 2003-04-04 | Imaging lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100356223C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101351765B (en) * | 2005-10-24 | 2010-08-25 | Rpo私人有限公司 | Improved optical elements for waveguide-based optical touch screens and method therefor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59135405A (en) * | 1983-01-22 | 1984-08-03 | Kowa Co | Light shielding plate of lens moving pole in camera or the like |
| JPH10145094A (en) * | 1996-11-14 | 1998-05-29 | Nec Corp | Parts mounting device |
| US5847835A (en) * | 1996-03-29 | 1998-12-08 | Tosoh Corporation | Optical absorbance meter |
-
2003
- 2003-04-04 CN CNB031141609A patent/CN100356223C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59135405A (en) * | 1983-01-22 | 1984-08-03 | Kowa Co | Light shielding plate of lens moving pole in camera or the like |
| US5847835A (en) * | 1996-03-29 | 1998-12-08 | Tosoh Corporation | Optical absorbance meter |
| JPH10145094A (en) * | 1996-11-14 | 1998-05-29 | Nec Corp | Parts mounting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1536383A (en) | 2004-10-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071219 Termination date: 20150404 |
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| EXPY | Termination of patent right or utility model |