CN100447655C - Aperture and optical lens - Google Patents
Aperture and optical lens Download PDFInfo
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- CN100447655C CN100447655C CNB2005100704424A CN200510070442A CN100447655C CN 100447655 C CN100447655 C CN 100447655C CN B2005100704424 A CNB2005100704424 A CN B2005100704424A CN 200510070442 A CN200510070442 A CN 200510070442A CN 100447655 C CN100447655 C CN 100447655C
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- optical filtering
- filtering portion
- aperture
- annular optical
- annular
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Abstract
The present invention discloses an aperture which is provided with a circular light filtering part and at least one annular light filtering part, wherein a circular region is formed by the circular light filtering part and the annular light filtering part, and the penetration wavelength range of the circular light filtering part is larger than that of the annular light filtering part. Using the aperture in a projecting lens can make the image projected by the projecting lens have high quality and high brightness.
Description
Technical field
The present invention relates to a kind of aperture and optical lens, relate in particular to a kind of aperture and optical lens with this aperture with a plurality of optical filtering portion.
Background technology
Figure 1A is the structural representation of existing projection lens, and Figure 1B is the structural representation of aperture among Figure 1A.Please refer to Figure 1A and Figure 1B, existing projection lens 100 comprises a plurality of eyeglasses 110 and aperture 120, and aperture 120 is disposed between the eyeglass 110.Projection lens 100 can form image on screen with light beam 80 projections on the screen (not shown).Wherein, aperture 120 has breakthrough portion 122 and absorbent portion 124, and breakthrough portion 122 is used to make light beam 80 to see through, and absorbent portion 124 is used to absorb light beam 80.In addition, the diameter of breakthrough portion 122 is relevant with the size of f value (f-number), the f value is the diameter value of lens focus (focal length) divided by breakthrough portion 122, generally represent with f/ numerical value (number), the diameter of the bigger then breakthrough portion 122 of numerical value is littler, and the heal diameter of little then breakthrough portion 122 of numerical value is bigger.
Hot spot (spot) figure of blue light, green glow and ruddiness when Fig. 2 A to Fig. 2 C shows f value that projection lens uses as f/2.1 respectively.Please refer to Fig. 2 A to Fig. 2 C, generally speaking, after passing through the aperture of identical f value, the shorter formed hot spot of light of wavelength is healed big, so by the hot spot maximum that can find out blue light among Fig. 2 A to Fig. 2 C, and the hot spot minimum of ruddiness.Yet the big young pathbreaker of hot spot influences image quality, and the hot spot of the blue light shown in Fig. 2 A is excessive, causes image quality relatively poor.
The hot spot figure of blue light, green glow and ruddiness when Fig. 3 A to Fig. 3 C shows f value that projection lens uses as f/2.4 respectively.Please refer to Fig. 3 A to Fig. 3 C, in general,, adopt the bigger aperture of numerical value (being that breakthrough portion 122 relative diameter values are less) to dwindle hot spot usually in order to improve image quality.Compare with Fig. 2 A to Fig. 2 C, the hot spot of blue light, green glow and ruddiness all dwindles in Fig. 3 A to Fig. 3 C, so use the bigger aperture of numerical value can improve image quality.
Yet, owing to the diameter value of bigger its breakthrough portion 122 (as shown in Figure 1) of aperture of numerical value is less, cause luminous flux to reduce, therefore reduced the brightness of image.
From the above, in the existing projection lens, if adopt the less aperture of numerical value, the brightness of image is higher, but image quality is relatively poor.Otherwise if adopt the bigger aperture of numerical value, the brightness of image is lower, but image quality is preferable.Therefore, prior art can't be taken into account the brightness and the image quality of image simultaneously.
Summary of the invention
Given this, the object of the present invention is to provide and a kind ofly can take into account the brightness of image and the aperture of image quality simultaneously.
Another object of the present invention provides a kind ofly can take into account the brightness of image and the optical lens of image quality simultaneously.
Based on above-mentioned and other purposes, the present invention proposes a kind of aperture, and it has a circular optical filtering portion and at least one annular optical filtering portion, and circular optical filtering portion and annular optical filtering portion constitute a border circular areas.Wherein, circular optical filtering portion penetrates the penetrate wavelength coverage of wavelength coverage greater than annular optical filtering portion.
The present invention also proposes a kind of optical lens, and it comprises an eyeglass and an aperture, and aperture is disposed at before the eyeglass.Aperture has a circular optical filtering portion and at least one annular optical filtering portion, and circular optical filtering portion and annular optical filtering portion constitute a border circular areas.Wherein, circular optical filtering portion penetrates the penetrate wavelength coverage of wavelength coverage greater than annular optical filtering portion.
Circular optical filtering portion is for example identical with the maximum penetration wavelength of annular optical filtering portion.
Annular optical filtering portion for example can be a plurality of, and be positioned at than the annular optical filtering portion of inner ring to penetrate wavelength coverage bigger.Wherein, annular optical filtering portion for example comprises one first annular optical filtering portion and one second annular optical filtering portion, and the first annular optical filtering portion is positioned between the circular optical filtering portion and the second annular optical filtering portion.In addition, the first annular optical filtering portion for example has first light filter film, and the second annular optical filtering portion for example has one second light filter film.In addition, circular optical filtering portion for example has one the 3rd light filter film.
The wavelength coverage that penetrates of circle optical filtering portion for example equals ruddiness, green glow and blue light wavelength scope, and the wavelength coverage that penetrates of the first annular optical filtering portion for example equals ruddiness and green wavelength, and the wavelength coverage that penetrates of the second annular optical filtering portion for example equals the red light wavelength scope.
Because aperture has different f values respectively to the light of different wave length, so except the hot spot that can prevent blue light, green glow and ruddiness excessive and influence the image quality, also can increase the luminous flux of green glow and ruddiness, to improve the brightness of the image that the projection of projection lens institute goes out.Therefore, aperture of the present invention and projection lens can be taken into account the brightness and the image quality of image simultaneously.
Description of drawings
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred implementation cited below particularly and the present invention is described in detail in conjunction with the accompanying drawings.
Figure 1A is the structural representation of existing projection lens;
Figure 1B is the structural representation of aperture among Figure 1A;
The hot spot figure of blue light, green glow and ruddiness when Fig. 2 A to Fig. 2 C shows f value that projection lens uses as the aperture of f/2.1 respectively;
The hot spot figure of blue light, green glow and ruddiness when Fig. 3 A to Fig. 3 C shows f value that projection lens uses as the aperture of f/2.4 respectively;
Fig. 4 A is the structural representation of the optical lens of the present invention's one preferred implementation;
Fig. 4 B is the structural representation of aperture among Fig. 4 A;
Fig. 5 A to Fig. 5 C shows blue light, green glow and ruddiness respectively by the hot spot figure behind the projection lens of the present invention's one preferred implementation;
The brightness comparison diagram of the image that Fig. 6 goes out for the projection of different projection lens institute.
Description of reference numerals
80 light beams
100,200 projection lens
110,210 eyeglasses
120,220 apertures
122 breakthrough portions
124 absorbent portions
222 circular optical filtering portions
224 annular optical filtering portions
226 first annular optical filtering portions
228 second annular optical filtering portions
Embodiment
Fig. 4 A is the structural representation of the optical lens of the present invention's one preferred implementation, and Fig. 4 B is the structural representation of aperture among Fig. 4 A.Please refer to Fig. 4 A and Fig. 4 B, the optical lens 200 of present embodiment comprises an at least one eyeglass 210 and an aperture 220, and aperture 220 is disposed at before the eyeglass 210.Wherein, aperture 220 has circular optical filtering portion 222 and at least one annular optical filtering portion 224, and circular optical filtering portion 222 constitutes a border circular areas with annular optical filtering portion 224.In addition, circular optical filtering portion 222 penetrates the penetrate wavelength coverage of wavelength coverage greater than annular optical filtering portion 224.
Annular optical filtering portion of the first annular optical filtering portion 226 and second 228 for example has first light filter film and second light filter film respectively, can make the first annular optical filtering portion 226 have the different wavelength coverages that penetrates with the second annular optical filtering portion 228 by means of different light filter films.Wherein, for example available plated film mode of first light filter film and second light filter film forms.Because coating technique maturation and cost are low, so can improve the production qualification rate of aperture 220 and reduce production costs.In addition, the circle optical filtering portion 222 of present embodiment can have the 3rd light filter film or not have light filter film.
In a preferred embodiment, circular optical filtering portion 222 is for example identical with the maximum penetration wavelength of annular optical filtering portion 224.For instance, the wavelength coverage that penetrates of circle optical filtering portion 222 for example equals ruddiness, green glow and blue light wavelength scope, the wavelength coverage that penetrates of the first annular optical filtering portion 226 for example equals ruddiness and green wavelength, and the wavelength coverage that penetrates of the second annular optical filtering portion 228 for example equals the red light wavelength scope.The central value that penetrates wavelength coverage of ruddiness is 625nm, and the central value that penetrates wavelength coverage of green glow is 527nm, and the central value that penetrates wavelength coverage of blue light is 465nm.
In other words, annular optical filtering portion of annular optical filtering portion of the penetrable circular optical filtering of ruddiness portion 222, first 226 and second 228, annular optical filtering portion of the penetrable circular optical filtering of green glow portion 222 and first 226, and the only penetrable circular optical filtering of blue light portion 222.In more detail, if the diameter of circular optical filtering portion 222 is long, the outer path length of the outer path length of the first annular optical filtering portion 226 and the second annular optical filtering portion 228 equal respectively f value be f/2.4 ,/pairing diameter is long when f/2.26 and f/2.1, then with regard to blue light, the f value of aperture 220 is f/2.4.With regard to green glow, the f value of aperture 220 is f/2.26.With regard to ruddiness, the f value of aperture 220 is f/2.1.Make the numerical value of f value of the short blue light of wavelength big whereby, thereby can dwindle hot spot and improve image quality than ruddiness and green glow.
In the prior art, adopt the bigger aperture of the numerical value of f value in order to improve image quality after, cause the luminous flux of blue light, green glow and ruddiness to reduce significantly, thereby influenced the brightness of image.The aperture 220 of present embodiment is because of neither together to the f value of blue light, green glow and ruddiness, so except the hot spot that can prevent blue light, green glow and ruddiness excessive and influence the image quality, also can increase the luminous flux of green glow and ruddiness, to improve the brightness of the image that 200 projections of projection lens go out.
Fig. 5 A to Fig. 5 C shows blue light, green glow and the ruddiness hot spot figure after by the projection lens of the present invention's one preferred implementation respectively.Please refer to Fig. 5 A to Fig. 5 C, be respectively f/2.4, f/2.26 and f/2.1 is an example with the f value of aperture 220 pairs of blue lights, green glow and ruddiness, the hot spot of blue light, green glow and the ruddiness that demonstrates in Fig. 5 A to Fig. 5 C is all not too large, so the image that 200 projections of the projection lens of present embodiment go out has higher image quality.
The brightness comparison diagram of the image that Fig. 6 goes out for the projection of different projection lens institute.Please refer to Fig. 6, wherein the f value of projection lens P1, P2 is respectively f/2.1 and f/2.4, and projection lens P3 is the projection lens of present embodiment, and promptly the f value is respectively f/2.4, f/2.26 and f/2.1.By among Fig. 6 as can be known, the image brilliance that the image brilliance that the projection lens P3 institute projection of present embodiment goes out goes out apparently higher than the projection of projection lens P2 institute, the only image brilliance that goes out a little less than the projection of projection lens P1 institute.Therefore, the projection lens of present embodiment can be taken into account the brightness and the image quality of image simultaneously.
Comparison diagram that it should be noted that above shown each f value, hot spot figure and image brilliance only is usefulness for example, is not in order to limit the present invention.In addition, can penetrate wavelength coverage adjustment, the also visual demand of number of annular optical filtering portion 224 and changing to annular optical filtering portion of annular optical filtering portion of the circle optical filtering portion 222, first of the aperture 220 of present embodiment 226 and second 224 according to different demands.In addition, the aperture 220 of present embodiment also can be applicable to widely in the imaging system, as the illuminator of projection arrangement except can be applicable to optical lens 200.
In sum, aperture of the present invention and projection lens have following advantage at least:
1. because aperture has different f values respectively to the light of different wave length, so except the hot spot that can prevent blue light, green glow and ruddiness excessive and influence the image quality, also can increase the luminous flux of green glow and ruddiness, thus the brightness of the image that the projection of raising projection lens institute goes out.Therefore, projection lens of the present invention can be taken into account the brightness and the image quality of image simultaneously.
2. because coating technique maturation and cost are low, so the light filter film that forms each optical filtering portion with the mode of plated film can improve the production qualification rate of aperture and save production cost.
Though the present invention discloses as above with preferred implementation; but it is not to be limitation of the present invention; the any technician in this area is under the prerequisite that does not exceed design of the present invention and scope; can make some and change and retouching, so the scope that protection scope of the present invention should define with appended claim is as the criterion.
Claims (5)
1. aperture, have a circular optical filtering portion and at least one annular optical filtering portion, described annular optical filtering portion is placed in the periphery of described circular optical filtering portion, make described circular optical filtering portion and described annular optical filtering portion constitute a border circular areas, wherein, described annular optical filtering portion comprises one first annular optical filtering portion and one second annular optical filtering portion, the described first annular optical filtering portion is positioned between the described circular optical filtering portion and the described second annular optical filtering portion, and the wavelength coverage that penetrates of described circular optical filtering portion equals ruddiness, green glow and blue light wavelength scope, the wavelength coverage that penetrates of the described first annular optical filtering portion equals ruddiness and green wavelength, and the wavelength coverage that penetrates of the described second annular optical filtering portion equals the red light wavelength scope.
2. aperture as claimed in claim 1, wherein, described circular optical filtering portion is identical with the maximum penetration wavelength of described annular optical filtering portion.
3. aperture as claimed in claim 1, wherein, the described first annular optical filtering portion has one first light filter film, and the described second annular optical filtering portion has one second light filter film.
4. aperture as claimed in claim 3, wherein, described circular optical filtering portion has one the 3rd light filter film.
5. aperture as claimed in claim 1, wherein, described aperture is set at before the eyeglass of optical lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100704424A CN100447655C (en) | 2005-05-09 | 2005-05-09 | Aperture and optical lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100704424A CN100447655C (en) | 2005-05-09 | 2005-05-09 | Aperture and optical lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1862356A CN1862356A (en) | 2006-11-15 |
| CN100447655C true CN100447655C (en) | 2008-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100704424A Expired - Fee Related CN100447655C (en) | 2005-05-09 | 2005-05-09 | Aperture and optical lens |
Country Status (1)
| Country | Link |
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| CN (1) | CN100447655C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107908063A (en) * | 2017-12-25 | 2018-04-13 | 陈益德 | Projection lens and projection display apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3763312A (en) * | 1970-12-12 | 1973-10-02 | Nippon Columbia | Optical system for photographic film televising apparatus |
| JPS5660413A (en) * | 1979-10-24 | 1981-05-25 | Toshiba Corp | Space filter |
| JPH0195689A (en) * | 1987-10-08 | 1989-04-13 | Fuji Photo Optical Co Ltd | Pattern projector |
-
2005
- 2005-05-09 CN CNB2005100704424A patent/CN100447655C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3763312A (en) * | 1970-12-12 | 1973-10-02 | Nippon Columbia | Optical system for photographic film televising apparatus |
| JPS5660413A (en) * | 1979-10-24 | 1981-05-25 | Toshiba Corp | Space filter |
| JPH0195689A (en) * | 1987-10-08 | 1989-04-13 | Fuji Photo Optical Co Ltd | Pattern projector |
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| Publication number | Publication date |
|---|---|
| CN1862356A (en) | 2006-11-15 |
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| 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 | ||
| ASS | Succession or assignment of patent right |
Owner name: AIXIN TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: ZHONGQIANG PHOTOELECTRIC CO LTD Effective date: 20120214 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120214 Address after: Delaware Patentee after: Suzhou Canyu Optics Co., Ltd. Address before: Hsinchu Science Park, Taiwan, China Patentee before: Zhongqiang Photoelectric Co., Ltd. |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081231 Termination date: 20130509 |