CN101414049B - Wide-angle projecting lens and projecting device using the same - Google Patents
Wide-angle projecting lens and projecting device using the same Download PDFInfo
- Publication number
- CN101414049B CN101414049B CN2007101815048A CN200710181504A CN101414049B CN 101414049 B CN101414049 B CN 101414049B CN 2007101815048 A CN2007101815048 A CN 2007101815048A CN 200710181504 A CN200710181504 A CN 200710181504A CN 101414049 B CN101414049 B CN 101414049B
- Authority
- CN
- China
- Prior art keywords
- lens
- mirror surface
- convex lens
- concave mirror
- face
- 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.)
- Active
Links
Images
Landscapes
- Lenses (AREA)
Abstract
The invention discloses a wide-angle projecting lens and a projecting apparatus applying the wide-angle projecting lens. The wide-angle projecting lens comprises a first lens group, a second lens group and a third lens group from the image side of the projecting apparatus. A diaphragm of the wide-angle projecting lens is arranged in the third lens group. The first lens group has negative effective refracting power and at least one aspherical mirror surface. The second lens group has first positive effective refracting power. The third lens group has second positive effective refracting power. The effective focal length of the wide-angle projecting lens is fw which is more than 6.5 and less than 9.5. The projecting apparatus of the invention comprises an optical module and the wide-angle projecting lens. The wide-angle projecting lens and the projecting apparatus applying the wide-angle projecting lens lead the magnified picture to still reserve most picture information.
Description
Technical field
The present invention relates to a kind of wide angle projection lens and the projection arrangement of using it, and be particularly related to a kind of wide angle projection lens and the projection arrangement of using it with three lens groups.
Background technology
No matter for family, amusement or business practice, projection arrangement is all being played the part of indispensable role.In business meetings, as long as with projection arrangement and notebook type or desktop type computer structure altogether, just can present the content of being set forth to express the speaker complementaryly with reporting with the amplification picture.In addition, with the projection arrangement stereo set of arranging in pairs or groups, the atmosphere that just is enough to build home theater, allow the general common people just can enjoy at home as at the cinema or theater appreciate the atmosphere and the enjoyment of film or performance.
Also because so, it for example is restrictive condition on the space that many designs of projection arrangement must be able to be satisfied many.For instance, bigger projecting space (for example being large conference room or speech meeting-place) the bigger projected picture of must arranging in pairs or groups, less projecting space (for example family parlor) does not then need picture high power ground is amplified out.Yet, because the size of projection device picture is relevant with the effective focal length of projection lens with resolution, how will still can keep most of image information after the amplification of picture high power, be each tame manufacturer all meet just before problem.
Summary of the invention
The present invention relates to a kind of wide angle projection lens and the projection arrangement of using it, be to utilize projection lens with three lens groups, and a lens group is had bear and imitate refracting power and at least one aspherical mirror, two other lens group has just effectively refracting power, to amplify picture and to keep most of image information.
The present invention proposes a kind of wide angle projection lens, and it is applied in the projection arrangement.This wide angle projection lens comprises first lens group, second lens group and the 3rd lens group from the image side of projection arrangement.The light hurdle of wide angle projection lens is arranged in the 3rd lens group.First lens group has the effect of bearing refracting power, and first lens group has at least one aspherical mirror.Second lens group has first just effective refracting power.The 3rd lens group has second just effective refracting power.The effective focal length of wide angle projection lens is fw, wherein 6.5＜fw＜9.5.
The height of the image on the wide angle projection lens image side provided by the invention is h, 1.2＜| h/fw|＜1.6.
Wide angle projection lens provided by the invention is the non-heart far away (non-telecentric) structure.
The visual angle of wide angle projection lens provided by the invention is between degree angle, 100 degree angle to 120.
First lens group of wide angle projection lens provided by the invention comprises a plurality of lens, and these lens have at least one aspherical mirror.Wherein these lens comprise: first meniscus has the first convex lens face and first concave mirror surface; Second meniscus has the second convex lens face and second concave mirror surface, and the second convex lens face is towards first concave mirror surface; The 3rd meniscus has the 3rd convex lens face and the 3rd concave mirror surface, and the 3rd convex lens face is towards second concave mirror surface; And plano-concave lens, have the 4th concave mirror surface towards the 3rd concave mirror surface.
Second lens group of wide angle projection lens provided by the invention comprises: plano-concave lens has first concave mirror surface, first lens group dorsad; Biconvex lens has the first convex lens face and the second convex lens face, and the first convex lens face is towards first concave mirror surface; And concave-convex lens, having the 3rd convex lens face and second concave mirror surface, the 3rd convex lens face is towards the second convex lens face.
The 3rd lens group of wide angle projection lens provided by the invention comprises between second lens group and light hurdle: concave-convex lens, have the first convex lens face and first concave mirror surface, and the first convex lens face is towards second lens group; First plano-concave lens has second concave mirror surface, first concave mirror surface dorsad; First biconvex lens has the second convex lens face and the 3rd convex lens face, and the second convex lens face overlaps with second concave mirror surface; And first biconcave lens, having the 3rd concave mirror surface and the 4th concave mirror surface, the 3rd concave mirror surface is towards the 3rd convex lens face.
The projection arrangement of wide angle projection lens provided by the invention also comprises optical module, and the 3rd lens group comprises between light hurdle and optical module: second biconvex lens, have the 4th convex lens face and the 5th convex lens face, and the 4th convex lens face is towards the 4th concave mirror surface; Second plano-concave lens has the 5th concave mirror surface; The 3rd biconvex lens has the 6th convex lens face and the 7th convex lens face, and the 6th convex lens face overlaps with the 5th concave mirror surface; And the 4th biconvex lens, having the 8th convex lens face and the 9th convex lens face, the 8th convex lens face is towards the 7th convex lens face.
The projection arrangement of wide angle projection lens provided by the invention also comprises optical module, and wide angle projection lens is between image side and optical module.
The optical module of wide angle projection lens provided by the invention is digital micro-mirror assembly (Digital Micro-mirror Device).
The present invention proposes a kind of projection arrangement in addition, and it comprises optical module and wide angle projection lens.This wide angle projection lens comprises first lens group, second lens group and the 3rd lens group.First lens group has the effect of bearing refracting power, and first lens group has at least one aspherical mirror.Second lens group is arranged between the optical module and first lens group, and second lens group has first just effective refracting power.The 3rd lens group is arranged between the optical module and second lens group, and the 3rd lens group has second just effective refracting power.The light hurdle of wide angle projection lens is arranged in the 3rd lens group.The effective focal length of wide angle projection lens is fw, wherein 6.5＜fw＜9.5.
Projection arrangement provided by the invention, wherein the effective focal length of wide angle projection lens is fw, the image height of wide angle projection lens on the image side is h, 1.2＜| h/fw|＜1.6.
Projection arrangement provided by the invention, wherein wide angle projection lens is the non-heart far away (non-telecentric) structure.
Projection arrangement provided by the invention, wherein the visual angle of wide angle projection lens is between degree angle, 100 degree angle to 120.
Projection arrangement provided by the invention, wherein first lens group comprises a plurality of lens, these lens have at least one aspherical mirror.
Projection arrangement provided by the invention, wherein these lens comprise: first meniscus, have the first convex lens face and first concave mirror surface, the first convex lens face is optical module dorsad; Second meniscus has the second convex lens face and second concave mirror surface, and the second convex lens face is towards first concave mirror surface; The 3rd meniscus has the 3rd convex lens face and the 3rd concave mirror surface, and the 3rd convex lens face is towards second concave mirror surface; And plano-concave lens, have the 4th concave mirror surface towards the 3rd concave mirror surface.
Projection arrangement provided by the invention, wherein second lens group comprises: plano-concave lens has first concave mirror surface, first lens group dorsad; Biconvex lens has the first convex lens face and the second convex lens face, and the first convex lens face is towards first concave mirror surface; And concave-convex lens, having the 3rd convex lens face and second concave mirror surface, the 3rd convex lens face is towards the second convex lens face.
Projection arrangement provided by the invention, wherein the 3rd lens group comprises between second lens group and light hurdle: concave-convex lens, have the first convex lens face and first concave mirror surface, the first convex lens face is towards second lens group; First plano-concave lens has second concave mirror surface, first concave mirror surface dorsad; First biconvex lens has the second convex lens face and the 3rd convex lens face, and the second convex lens face overlaps with second concave mirror surface; And first biconcave lens, having the 3rd concave mirror surface and the 4th concave mirror surface, the 3rd concave mirror surface is towards the 3rd convex lens face.
Projection arrangement provided by the invention, wherein the 3rd lens group comprises between light hurdle and optical module: second biconvex lens, have the 4th convex lens face and the 5th convex lens face, the 4th convex lens face is towards the 4th concave mirror surface; Second plano-concave lens has the 5th concave mirror surface; The 3rd biconvex lens has the 6th convex lens face and the 7th convex lens face, and the 6th convex lens face overlaps with the 5th concave mirror surface; And the 4th biconvex lens, having the 8th convex lens face and the 9th convex lens face, the 8th convex lens face is towards the 7th convex lens face.
For foregoing of the present invention can be become apparent, preferred embodiment cited below particularly, and in conjunction with the accompanying drawings, be described in detail below:
Description of drawings
Figure 1A is the synoptic diagram of projection arrangement according to the preferred embodiment of the invention.
Figure 1B is the synoptic diagram of first lens group of Figure 1A.
Fig. 1 C is the synoptic diagram of second lens group of Figure 1A.
Fig. 1 D is the synoptic diagram of the 3rd lens group of Figure 1A.
Fig. 2 is wide angle projection lens is tested gained according to table 2 the curvature of field and distortion curve figure.
Fig. 3 A～3H is wide angle projection lens is tested gained according to table 2 ray aberration figure.
Fig. 4 is that wide angle projection lens is tested gained resolution and the right graph of a relation of line number according to table 2.
Fig. 5 A～5H is wide angle projection lens is tested gained imaging point side-play amount according to table 2 a synoptic diagram.
Embodiment
Referring to Figure 1A～1D, Figure 1A is the synoptic diagram according to the projection arrangement of the preferred embodiment of the present invention, and Figure 1B is the synoptic diagram of first lens group of Figure 1A, and Fig. 1 C is the synoptic diagram of second lens group of Figure 1A, and Fig. 1 D is the synoptic diagram of the 3rd lens group of Figure 1A.Projection arrangement 1 comprises optical module 10 and wide angle projection lens 20.This wide angle projection lens 20 comprises first lens group 21, second lens group 22 and the 3rd lens group 23.First lens group 21 has to bear imitates refracting power (negative effective power), and first lens group 21 has at least one aspherical mirror (aspheric lens surface).Second lens group 22 is arranged between the optical module 10 and first lens group 21, and second lens group 22 has first just effective refracting power (positive effective power).The 3rd lens group 23 is arranged between the optical module 10 and second lens group 22, and the 3rd lens group 23 has second just effective refracting power.(aperture stop) is arranged in the 3rd lens group 23 on the light hurdle 25 of wide angle projection lens 20.
Preferably, see through first lens group 21, second lens group 22 and 23 combinations of the 3rd lens group, the height h of the image on effective focal length (the effective focal length) fw of wide angle projection lens 20 and the image side (not shown, as to be positioned at the leftward position of the 1st figure wide angle projection lens 20) is closed be:
1.2＜|h/fw|＜1.6
In addition, the visual angle of wide angle projection lens 20 is between degree angle, 100 degree angle to 120.
The surperficial polynomial expression of aspherical mirror can be expressed as:
Wherein X is the horizontal range apart from rotation axes of symmetry, and R is a vertex curvature radius, and K is the conic section constant, and A is corresponding to X
44 item correction factors, B, C and D then are followed successively by the item correction factor 6,8 and 10 times.General get item 10 times mostly, so present embodiment is only enumerated correction factor K, A～D explanation.In first lens group 21, only need an aspherical mirror to get final product.And in the present embodiment, use two aspherical mirrors.The coefficient of first and second face aspherical mirror is asked for an interview table 1.
Table 1
| First aspherical mirror | Second aspherical mirror | |
| K | 2.129996 | -0.2726078 |
| A | 5.4968331e-006 | 4.3270304e-006 |
| B | -2.5176141e-009 | 2.3293403e-010 |
| C | 8.2007016e-013 | -6.9193386e-013 |
| D | 1.3103019e-017 | -5.7898546e-015 |
Referring to Fig. 1 C, second lens group 22 between first lens group 21 and the 3rd lens group 23 comprises plano-concave lens 221, biconvex lens 223 and concave-convex lens 225.Plano-concave lens 221 has flat minute surface 221a and concave mirror surface 221b, wherein concave mirror surface 221b first lens group 21 dorsad.Biconvex lens 223 has convex lens face 223a and 223b, and wherein convex lens face 223a is towards concave mirror surface 221b.Concave-convex lens 225 has a convex lens face 225a and a concave mirror surface 225b, and wherein convex lens face 225a is towards convex lens face 223b.
As for the 3rd lens group 23, referring to Fig. 1 D, preferably, the 3rd lens group 23 comprises concave-convex lens 231, plano-concave lens 233, biconvex lens 235 and biconcave lens 237 between second lens group 22 and light hurdle 25.Concave-convex lens 231 has convex lens face 231a and concave mirror surface 231b, and wherein convex lens face 231a is towards second lens group 22.Plano-concave lens 233 has flat minute surface 233a and concave mirror surface 233b, wherein concave mirror surface 233b concave mirror surface 231b dorsad.Biconvex lens 235 has convex lens face 235a and 235b, and wherein convex lens face 235a overlaps with concave mirror surface 233b.Biconcave lens 237 has concave mirror surface 237a and concave mirror surface 237b, and wherein concave mirror surface 237a is towards convex lens face 235b.
The 3rd lens group 23 comprises biconvex lens 239, plano-concave lens 241 and two other biconvex lens 243 and 245 between light hurdle 25 and optical module 10.Biconvex lens 239 has convex lens face 239a and 239b, and wherein convex lens face 239a is towards concave mirror surface 237b.Plano-concave lens 241 has flat minute surface 241a and concave mirror surface 241b.Biconvex lens 243 has convex lens face 243a and 243b, and wherein convex lens face 243a overlaps with concave mirror surface 241b.245 of biconvex lens have convex lens face 245a and 245b, and wherein convex lens face 245a is towards convex lens face 243b.
The optical data and the configuration of each lens of above-mentioned first lens group 21 of present embodiment, second lens group 22 and the 3rd lens group 23 are listed in the table 2, yet technology of the present invention is not limited thereto.
Table 2
| Lens | Minute surface | Radius-of-curvature (mm) | Thickness (spacing *)(mm) | Effective diameter scope (mm) | Effective focal length (mm) |
| 211 | 211a | 65.72057 | 4 | ψ73.2 | ?EFL(21)?-9.394 |
| 211b | 27.92179 | 14 | ψ60.4 | ||
| 213 | 213a | 39.478 | 2.4 | ψ54.2 | |
| 213b | 21.89 | 8.6 | ψ40.4 | ||
| 215 | 215a | 40.633 | 1.9 | ψ40 | |
| 215b | 18.373 | 13.17 | |
||
| 217 | 217a | -36.686 | 3 | ψ31.6 | |
| 217b | -- | 17.7 | ψ32.4 | ||
| 221 | 221a | -- | 8 | ψ36.9 | ?EFL(22)?44.044 |
| 221b | 75.632 | 2.38 | ψ38.26 | ||
| 223 | 223a | 84.157 | 11.9 | |
|
| 223b | -48.164 | 5.08 | ψ41.2 |
| 225 | 225a | 45.964 | 8.7 | ψ39.4 | |
| 225b | 500 | 15 | ψ37.3 | ||
| 231 | 231a | 23.795 | 3.1 | ψ23.6 | ?EFL(23)?47.895 |
| 231b | 65.546 | 5.76 | ψ22.9 | ||
| 233 | 233a | -- | 2.5 | -- | |
| 233b | 245.47 | 0 | ψ16.6 | ||
| 235 | 235a | 10.657 | 7.55 | ψ13.8 | |
| 235b | -21.783 | 0.35 | ψ13 | ||
| 237 | 237a | -19.636 | 1 | ψ12.84 | |
| 237b | 144.251 | 0.17 | ψ13 | ||
| The light hurdle | -- | -- | 0.1 | ψ13 | |
| 239a | 18.573 | 6.35 | ψ13 | ||
| 239b | -29.054 | 0.4 | ψ13 | ||
| 241 | 241a | -- | 1 | ψ13 | |
| 241b | 12.957 | 0 | ψ13 | ||
| 243 | 243a | 12.957 | 4.1 | ψ13 | |
| 243b | -79.548 | 0.1 | ψ13.6 | ||
| 245 | 245a | 48.553 | 2.94 | ψ15 | |
| 245b | -30.727 | 25 | ψ15 |
*Annotate: spacing is the airspace of this minute surface and next lens
The concave-convex lens 211 of first lens group 21 and the distance of image side be about 1300 millimeters (millimeter, mm).The effective focal length EFL of first lens group 21 (21) is-9.394 millimeters, and the effective focal length EFL of second lens group 22 (22) is 44.044 millimeters, and the effective focal length EFL of the 3rd lens group 23 (23) is 47.895 millimeters.Below the wide angle projection lens 20 of explanation present embodiment is tested the result of gained according to table 2.
Referring to Fig. 2, it is wide angle projection lens is tested gained according to table 2 the curvature of field and distortion curve figure.Test result as shown in Figure 2 as can be known, different wavelengths of light is after wide angle projection lens projection, the curvature of field situation of different wavelengths of light all meets in the critical field of general provision (being about 0.2 millimeter), and also conformance with standard (being about 2 number percents) of its amount of distortion.
Referring to Fig. 5 A～5H, it tests the synoptic diagram of gained imaging point side-play amount for wide angle projection lens according to table 2.After wide angle projection lens 20 projected image side (being generally projection screen) with image, whether the imaging point size that measures diverse location on the image side again conformance with standard.Generally speaking, imaging point need be positioned at and be about 10.8 nanometers with length and width (nanometer nm) constitutes in the critical field of block.Shown in accompanying drawing 5A～5H, the imaging point of eight some positions (imaging point is that the curve by different wavelengths of light is constituted) P1～P8 all is positioned at block (length and width is 10.8 nanometers) approximately, just the wide angle projection lens 20 of the present embodiment imaging point size conformance with standard of being throwed.
Then referring to Fig. 3 A～3H, it is wide angle projection lens is tested gained according to table 2 ray aberration figure.Get eight imaging point P1～P8 same as described above and measure, shown in the 3A～3H figure, the numerical value of the ray aberration of each imaging point P1～P8 is all in critical field.
In addition, referring to Fig. 4, it is that wide angle projection lens is tested gained resolution and the right graph of a relation of line number according to table 2.Each curve among Fig. 4 is the test result of different wavelengths of light.Test result by Fig. 4 can be observed, the equal conformance with standard of resolution (generally being about 40%) that each line number is right.
By above each test result as can be known, because image is after wide angle projection lens 20 casts out, its curvature of field, distortion, side-play amount and ray aberration are all in critical field, thereby imaging point can comparatively verily be presented.
The distance setting that the wide angle projection lens 20 of present embodiment can be used for wide angle projection lens 20 and image side (projection screen) is 1 meter, so that the image (projectual) that is projeced on the image side highly is about 70 cun.In addition, the effective focal length fw scope of wide angle projection lens 20 is 6.5＜fw＜9.5.At present common on the market its effective focal length of projection lens is longer, is about the twice of present embodiment projection lens.The wide angle projection lens 20 of present embodiment has the effect of short Jiao, the non-heart far away (non-telecentric).
Though above-mentioned first lens group 21 of present embodiment, second lens group 22 and the 3rd lens group 23 are made up of the lens with different optical characteristic, the present invention is not limited to this.Those of ordinary skills as can be known, anyly first lens group 21 had bear a combination of lenses of imitating the refracting power characteristic, and make second lens group 22 and the 3rd lens group 23 have the just effectively combination of lenses of refracting power characteristic, and the light field includes in category of the present invention in the wide angle projection lens in the nearest lens group of optical module.
Wide angle projection lens and the projection arrangement of using it that the above embodiment of the present invention is disclosed make three lens groups of wide angle projection lens have negative, positive, just effective refracting power successively, and the light field are in the nearest lens groups of distance optical module.Comprise at least one aspherical mirror and have the lens group of bearing the effect refracting power.So, wide angle projection lens can keep the information of most of image and verily be presented image with the projection arrangement of using it.
In sum, though the present invention discloses as above with preferred embodiment, so it is not in order to limit the present invention.The general technical staff of the technical field of the invention without departing from the spirit and scope of the present invention, can do various changes and modification.Therefore, protection scope of the present invention is worked as with being as the criterion that the accompanying Claim protection domain is defined.
The primary clustering symbol description
1: projection arrangement
10: optical module
20: wide angle projection lens
21: the first lens group
22: the second lens groups
23: the three lens groups
25: the light hurdle
211,213,215: meniscus
211a, 213a, 215a, 223a, 223b, 225a, 231a, 235a, 235b, 239a, 239b, 243a, 243b, 245a, 245b: convex lens face
211b, 213b, 215b, 217a, 221b, 225b, 231b, 233b, 237a, 237b, 241b: concave mirror surface
217,221,233,241: plano-concave lens
217b, 221a, 233a, 241a: flat minute surface
223,235,239,243,245: biconvex lens
225,231: concave-convex lens
237: biconcave lens
Claims (14)
1. a wide angle projection lens is applied to projection arrangement, and described wide angle projection lens comprises from the image side of described projection arrangement:
First lens group has the effect of bearing refracting power, and described first lens group comprises a plurality of lens, and described these lens have at least one aspherical mirror;
These lens comprise:
First meniscus has the first convex lens face and first concave mirror surface;
Second meniscus has the second convex lens face and second concave mirror surface, and the described second convex lens face is towards described first concave mirror surface;
The 3rd meniscus has the 3rd convex lens face and the 3rd concave mirror surface, and described the 3rd convex lens face is towards described second concave mirror surface; And
Plano-concave lens has the 4th concave mirror surface towards described the 3rd concave mirror surface;
Second lens group has first just effective refracting power;
The 3rd lens group has second just effective refracting power; And
The light hurdle is arranged in described the 3rd lens group;
Wherein, the synthetic effective focal length of described first lens group, described second lens group and described the 3rd lens group is fw, 6.5mm＜fw＜9.5mm; Wherein said wide angle projection lens is non-core structure far away.
2. wide angle projection lens according to claim 1, the effective focal length of wherein said wide angle projection lens are fw, and the height of the image on the described image side is h, and the unit of h is a millimeter, 1.2＜| h/fw|＜1.6.
3. wide angle projection lens according to claim 1, the visual angle of wherein said wide angle projection lens is between degree angle, 100 degree angle to 120.
4. wide angle projection lens according to claim 1, wherein said second lens group comprises:
Plano-concave lens has described dorsad first lens group of first concave mirror surface;
Biconvex lens has the first convex lens face and the second convex lens face, and the described first convex lens face is towards described first concave mirror surface; And
Concave-convex lens has the 3rd convex lens face and second concave mirror surface, and described the 3rd convex lens face is towards the described second convex lens face.
5. wide angle projection lens according to claim 1, wherein said the 3rd lens group comprises between described second lens group and described smooth hurdle:
Concave-convex lens has the first convex lens face and first concave mirror surface, and the described first convex lens face is towards described second lens group;
First plano-concave lens has described dorsad first concave mirror surface of second concave mirror surface;
First biconvex lens has the second convex lens face and the 3rd convex lens face, and the described second convex lens face overlaps with described second concave mirror surface; And
First biconcave lens has the 3rd concave mirror surface and the 4th concave mirror surface, and described the 3rd concave mirror surface is towards described the 3rd convex lens face.
6. wide angle projection lens according to claim 5, wherein said projection arrangement also comprises optical module, described the 3rd lens group comprises between described smooth hurdle and described optical module:
Second biconvex lens has the 4th convex lens face and the 5th convex lens face, and described the 4th convex lens face is towards described the 4th concave mirror surface;
Second plano-concave lens has the 5th concave mirror surface;
The 3rd biconvex lens has the 6th convex lens face and the 7th convex lens face, and described the 6th convex lens face overlaps with described the 5th concave mirror surface; And
The 4th biconvex lens has the 8th convex lens face and the 9th convex lens face, and described the 8th convex lens face is towards described the 7th convex lens face.
7. wide angle projection lens according to claim 1, wherein said projection arrangement also comprises optical module, described wide angle projection lens is between described image side and described optical module.
8. wide angle projection lens according to claim 1, wherein said optical module are the digital micro-mirror assemblies.
9. projection arrangement comprises:
Optical module; And
Wide angle projection lens comprises:
First lens group has the effect of bearing refracting power, and described first lens group comprises a plurality of lens, and described these lens have at least one aspherical mirror;
These lens comprise:
First meniscus has the first convex lens face and first concave mirror surface, the described dorsad optical module of the wherein said first convex lens face;
Second meniscus has the second convex lens face and second concave mirror surface, and the described second convex lens face is towards described first concave mirror surface;
The 3rd meniscus has the 3rd convex lens face and the 3rd concave mirror surface, and described the 3rd convex lens face is towards described second concave mirror surface; And
Plano-concave lens has the 4th concave mirror surface towards described the 3rd concave mirror surface;
Second lens group is arranged between described optical module and described first lens group, and described second lens group has first just effective refracting power;
The 3rd lens group is arranged between described optical module and described second lens group, and described the 3rd lens group has second just effective refracting power; And
The light hurdle is arranged in described the 3rd lens group;
Wherein, the synthetic effective focal length of described first lens group, described second lens group and described the 3rd lens group is fw, 6.5mm＜fw＜9.5mm; Wherein said wide angle projection lens is non-core structure far away.
10. projection arrangement according to claim 9, the effective focal length of wherein said wide angle projection lens are fw, and the image height of described wide angle projection lens on the image side is h, and the unit of h is a millimeter, 1.2＜| h/fw|＜1.6.
11. projection arrangement according to claim 9, the visual angle of wherein said wide angle projection lens is between degree angle, 100 degree angle to 120.
12. projection arrangement according to claim 9, wherein said second lens group comprises: plano-concave lens has described dorsad first lens group of first concave mirror surface;
Biconvex lens has the first convex lens face and the second convex lens face, and the described first convex lens face is towards described first concave mirror surface; And
Concave-convex lens has the 3rd convex lens face and second concave mirror surface, and described the 3rd convex lens face is towards the described second convex lens face.
13. projection arrangement according to claim 9, wherein said the 3rd lens group comprises between described second lens group and described smooth hurdle:
Concave-convex lens has the first convex lens face and first concave mirror surface, and the described first convex lens face is towards described second lens group;
First plano-concave lens has described dorsad first concave mirror surface of second concave mirror surface;
First biconvex lens has the second convex lens face and the 3rd convex lens face, and the described second convex lens face overlaps with described second concave mirror surface; And
First biconcave lens has the 3rd concave mirror surface and the 4th concave mirror surface, and described the 3rd concave mirror surface is towards described the 3rd convex lens face.
14. projection arrangement according to claim 13, wherein said the 3rd lens group comprises between described smooth hurdle and described optical module:
Second biconvex lens has the 4th convex lens face and the 5th convex lens face, and described the 4th convex lens face is towards described the 4th concave mirror surface;
Second plano-concave lens has the 5th concave mirror surface;
The 3rd biconvex lens has the 6th convex lens face and the 7th convex lens face, and described the 6th convex lens face overlaps with described the 5th concave mirror surface; And
The 4th biconvex lens has the 8th convex lens face and the 9th convex lens face, and described the 8th convex lens face is towards described the 7th convex lens face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101815048A CN101414049B (en) | 2007-10-18 | 2007-10-18 | Wide-angle projecting lens and projecting device using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101815048A CN101414049B (en) | 2007-10-18 | 2007-10-18 | Wide-angle projecting lens and projecting device using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101414049A CN101414049A (en) | 2009-04-22 |
| CN101414049B true CN101414049B (en) | 2011-07-20 |
Family
ID=40594665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101815048A Active CN101414049B (en) | 2007-10-18 | 2007-10-18 | Wide-angle projecting lens and projecting device using the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101414049B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101556424B (en) * | 2009-02-11 | 2011-02-16 | 苏州佳世达光电有限公司 | Projecting apparatus |
| CN102819090B (en) | 2011-06-09 | 2015-03-25 | 中山市云创知识产权服务有限公司 | Projection lens |
| CN103959126B (en) * | 2011-12-01 | 2017-03-08 | 三菱电机株式会社 | Projection optical system and projection type video display device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1656407A (en) * | 2002-02-25 | 2005-08-17 | 松下电器产业株式会社 | Zoom lens, and video camera and digital still camera using the zoom lens |
| US7173777B1 (en) * | 2006-02-14 | 2007-02-06 | 3M Innovative Properties Company | Projection lens and display device for multimedia and other systems |
-
2007
- 2007-10-18 CN CN2007101815048A patent/CN101414049B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1656407A (en) * | 2002-02-25 | 2005-08-17 | 松下电器产业株式会社 | Zoom lens, and video camera and digital still camera using the zoom lens |
| US7173777B1 (en) * | 2006-02-14 | 2007-02-06 | 3M Innovative Properties Company | Projection lens and display device for multimedia and other systems |
Non-Patent Citations (3)
| Title |
|---|
| JP特开2004-317645A 2004.11.11 |
| JP特开2007-121748A 2007.05.17 |
| JP特开平11-95104A 1999.04.09 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101414049A (en) | 2009-04-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101046544B (en) | Two pieces imaging lens unit | |
| CN107402430B (en) | Optical image lens, image capturing device and electronic device | |
| CN106886081B (en) | Image capturing optical lens assembly, image capturing device and electronic device | |
| CN201749248U (en) | Projection optical system and projection type display device using same | |
| JP4416391B2 (en) | Wide-angle lens, camera and projection display device | |
| TWI541535B (en) | Six-piece lens module for capturing images | |
| JP4624535B2 (en) | Wide angle projection lens and projection image display apparatus using the same | |
| CN104914555B (en) | Wide-angle image pickup lens assembly, image capturing device and vehicle device | |
| CN101923205B (en) | Wide-angle projection optical system | |
| CN102486570B (en) | Optical system for photography | |
| CN101726833B (en) | Projection lens | |
| CN101441313B (en) | Projection lens and projection type display device using the same | |
| JP4232269B2 (en) | Projection optical system | |
| CN103984079A (en) | Wide-view-angle camera lens group | |
| CN109283668A (en) | Optical lens | |
| CN109270668B (en) | Telecentric projection lens and image output equipment | |
| CN102566014A (en) | Lens module | |
| CN207181796U (en) | A kind of ultrashort out-of-focus projection's camera lens | |
| CN101414049B (en) | Wide-angle projecting lens and projecting device using the same | |
| JP5731176B2 (en) | Projection lens and projection-type image display device | |
| CN101995647A (en) | Zoom projection lens | |
| CN207051641U (en) | A kind of projection lens and optical projection system | |
| CN1328609C (en) | Taking lens system | |
| CN203337908U (en) | Eight-stack nine-patch digital short-focus projection lens infrastructure | |
| CN101833160B (en) | Image taking optical lens system |
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 |