CN101988983A - Optical lens applied to small projector - Google Patents
Optical lens applied to small projector Download PDFInfo
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- CN101988983A CN101988983A CN2009101615515A CN200910161551A CN101988983A CN 101988983 A CN101988983 A CN 101988983A CN 2009101615515 A CN2009101615515 A CN 2009101615515A CN 200910161551 A CN200910161551 A CN 200910161551A CN 101988983 A CN101988983 A CN 101988983A
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Abstract
The invention provides an optical lens applied to a small projector, which comprises a first lens group and a second lens group with positive diopter, and an aperture stop, wherein the aperture stop is arranged in front of the first lens group, which shortens the distance between the first lens group and the second lens group, thus the volume of the optical lens is shortened. According to the invention, the equivalent focal length of the optical length is regulated through changing the distance between the first and the second lens groups.
Description
Technical field
The present invention relates to optical lens, relate in particular to a kind of optical lens that is applied to small-sized projector.
Background technology
In the daily life, projection arrangement often is used to picture and text or view data projection are amplified on projection surface, is beneficial to many people and watches together.Along with all having towards light, thin, short and small designer trends, electronic equipment satisfies the demand of people for convenience, projection arrangement is tending towards microminiaturization no exceptionly, so that can be applied to electronic products such as 3G mobile, PDA, also or become a kind of portable mini-projector.Therefore, if can improve the volume or the configuration mode of each assembly of projection arrangement, will help the miniaturization of projection arrangement.
See also Fig. 1, it is the structural representation of existing penetration projection arrangement.This projection arrangement 1 comprises illuminator 10, image display device 11 and optical lens 12.Illuminator 10 provides light source to image display device 11, and optical lens 12 is the image projection of the image display device 11 at its rear projection surface 2 to the place ahead, the image of image display device 11 is exaggerated is shown on the projection surface 2.
See also Fig. 2, it is the optical texture synoptic diagram of existing optical lens.This optical lens 12 is double gauss structure camera lens (Double Gauss Lens), comprises the first lens group 121, the second lens group 122 and aperture mirror light hurdle 123. are wherein; First lens group 121 sequentially comprises the first compound lens 1212 that the first convex lens 12121 that the first meniscus lens 1211 that protrusion direction is identical with the image projecting direction and protrusion direction are identical with the image projecting direction and the first concavees lens 12122 consist of along optical axis by the place ahead to rear, and the second lens group 122 sequentially comprises the second meniscus lens 1221 that protrusion direction is opposite with the image projecting direction and the second compound lens 1222 that is made of protrusion direction the second convex lens 12221 opposite with the image projecting direction and the second concavees lens 12222 along optical axis by the place ahead to rear.
In addition, aperture mirror light hurdle 123 is arranged between these lens groups 121,122, except the light transmission capacity of regulating optical lens 12, also, make these lens groups 121,122 reach the effect of aberration complementation because of aperture mirror light hurdle 123 in order to proofread and correct these lens group 121,122 aberrations that produced; Certainly, aforementioned techniques is well known to those of ordinary skill in the art, is no longer given unnecessary details at this.
Therefore the shortcoming of prior art is that aperture mirror light hurdle 123 need be arranged between these lens groups 121,122, makes that the volume of optical lens 12 is excessive and does not meet the requirement of mini-projector.
Summary of the invention
The technical problem to be solved in the present invention is, at the prior art above shortcomings, provides a kind of optical lens that is applied to small-sized projector, and volume is little and can and be amplified to a projection surface with the image projection of image display device.
The technical solution adopted for the present invention to solve the technical problems provides a kind of optical lens that is applied to small-sized projector, in order to image projection to a projection surface with image display device, the image of this image display device is exaggerated is shown on this projection surface, this optical lens comprises the first lens group, the second lens group and aperture mirror light hurdle; Wherein, this first lens group comprises at least one non-spherical lens, in order to revise aberration; This second lens group be arranged at the first lens group the rear and with this first lens group at a distance of first distance, in order to will from and refract to this first lens group perpendicular to the light source of this image display device; By changing this first distance between this first lens group and this second lens group, to adjust the equivalent focal length of this optical lens; This aperture mirror light hurdle is arranged at the place ahead of this first lens group, in order to regulate the light transmission capacity of this optical lens.
This first lens group has positive diopter, and it comprises first non-spherical lens that at least one protrusion direction first convex lens identical with the image projection direction are opposite with the image projection direction with a protrusion direction.
This first lens group also comprises protrusion direction crescent lens, biconcave lens and the protrusion direction identical with the image projection direction second convex lens opposite with the image projection direction.
This first lens group also comprises protrusion direction second non-spherical lens, biconcave lens and the protrusion direction identical with the image projection direction second convex lens opposite with the image projection direction.
This second lens group has positive diopter, comprises the 3rd convex lens that at least one protrusion direction is opposite with the image projection direction.
This second lens group has positive diopter, comprise at least one first biconvex lens and one second biconvex lens, wherein this first biconvex lens and this second biconvex lens be at a distance of a second distance, and by changing this second distance, to adjust the equivalent focal length of this optical lens.
The 3rd convex lens are Fresnel Lenses.
The external diameter of this first lens group is less than the external diameter of this second lens group.
This optical lens can shorten this first distance between this first lens group and this second lens group when non-working condition, in order to reduce the volume of this optical lens.
The present invention also provides a kind of small-sized projector with camera lens Telescopic, and it comprises image display device, optical lens, first shell and second shell; Wherein, this device used for image display is with display image; This optical lens is exaggerated this image and is shown on this projection surface in order to this image projection to one projection surface; This optical lens comprises the first lens group, the second lens group and aperture mirror light hurdle, and this aperture mirror light hurdle is arranged at the place ahead of this first lens group, and this second lens group is arranged at the rear of this first lens group; This first shell is in order to this first lens group of ladle cover and this aperture mirror light hurdle; This second shell is in order to this second lens group of ladle cover; Wherein, this first shell and this second shell link with stretch mode, and when this small-sized projector during at non-working condition, this first shell can be recessed in this second shell, in order to reduce the volume of this small-sized projector.
This first lens group and this second lens group all have positive diopter, and this first lens group comprises at least one non-spherical lens, and this second lens group be arranged at this first lens group rear and with this first lens group at a distance of one first distance, and in order to will from and refract to this first lens group perpendicular to the light source of this image display device; Wherein, by changing this first distance between this first lens group and this second lens group, to adjust the equivalent focal length of this optical lens.
This first lens group comprises first non-spherical lens that at least one protrusion direction first convex lens identical with the image projection direction are opposite with the image projection direction with a protrusion direction.
This first lens group also comprises protrusion direction crescent lens, biconcave lens and the protrusion direction identical with the image projection direction second convex lens opposite with the image projection direction.
This first lens group also comprises protrusion direction second non-spherical lens, biconcave lens and the protrusion direction identical with the image projection direction second convex lens opposite with the image projection direction.
This second lens group comprises the 3rd convex lens that at least one protrusion direction is opposite with the image projection direction.
This second lens group comprises at least one first biconvex lens and one second biconvex lens, and wherein this first biconvex lens and this second biconvex lens be at a distance of a second distance, and by changing this second distance, to adjust the equivalent focal length of this optical lens.
The external diameter of this first lens group is less than the external diameter of this second lens group.
This first shell has slide block, and this second shell has guidance axis, and this guidance axis passes this slide block, and this slide block is moved along this guidance axis.
The present invention is applied to the optical lens of small-sized projector, the aberration that can this first and second lens group be produced levels off to zero, make aperture mirror light hurdle can be arranged on the place ahead of the first lens group and not influence the projection performance, therefore shortened the distance between first and second lens group, therefore reduce the volume of this optical lens, can reduce to use the volume of the small-sized projector of this optical lens; Simultaneously, because the external diameter of the first lens group is less than the external diameter of the second lens group, first shell that makes ladle cover the first lens group can be recessed in ladle cover and in second shell of the second lens group under non-working condition, can further reduce to use the small-sized projector of this optical lens; In addition, the present invention can also adjust the equivalent focal length of this optical lens by changing first and second lens group distance apart.
Description of drawings
Fig. 1 is the structural representation of existing penetration projection arrangement.
Fig. 2 is the optical texture synoptic diagram of existing optical lens.
Fig. 3 is the optical texture synoptic diagram of the present invention's first preferred embodiment.
Fig. 4 is the optical texture synoptic diagram of the present invention's second preferred embodiment.
Fig. 5 is the optical texture synoptic diagram of the present invention's the 3rd preferred embodiment.
Fig. 6 is the Fresnel Lenses synoptic diagram of preferred embodiment of the present invention.
Fig. 7 is the surface structure synoptic diagram of the present invention's first preferred embodiment.
Fig. 8 is the part-structure synoptic diagram of the present invention's first preferred embodiment.
Fig. 9 is the surface structure synoptic diagram of the present invention's second preferred embodiment.
Figure 10 is the surface structure diagrammatic cross-section of the present invention's second preferred embodiment.
Figure 11 is the surface structure synoptic diagram of preferred embodiment of the present invention under non-working condition.
Figure 12 is the surface structure diagrammatic cross-section of preferred embodiment of the present invention under non-working condition.
Embodiment
See also Fig. 3, it is for the optical texture synoptic diagram of the present invention's first preferred embodiment.Optical lens 3 is in order to the image of projection and enlarged image display device 4, and it comprises the first lens group 31, the second lens group 32 and aperture mirror light hurdle 33; Wherein, the first lens group 31 is arranged between the second lens group 32 and the aperture mirror light hurdle 33, and aperture mirror light hurdle 33 is in order to regulate the light transmission capacity of this optical lens 3.
The first lens group 31 comprises first convex lens 310 that protrusion direction is identical with the image projection direction along optical axis 5 in regular turn by the place ahead to rear, the crescent lens 311 that protrusion direction is identical with the image projection direction, first biconcave lens 312, first non-spherical lens 314 that second convex lens 313 that protrusion direction is opposite with the image projection direction and protrusion direction are opposite with the image projection direction, and the second lens group 32 be arranged at the first lens group 31 the rear and with its at a distance of one first distance, first distance is D1 in the present embodiment, and is made of protrusion direction the 3rd convex lens 321 opposite with the image projection direction; Wherein, the external diameter R1 of the first lens group 31 is less than the external diameter R2 of the second lens group 32.
See also Fig. 4, it is for the optical texture synoptic diagram of the present invention's second preferred embodiment.Second preferred embodiment and the difference of first preferred embodiment are different on optical texture of the first lens group 31 and the second lens group 32.Wherein, the first lens group 31 of second preferred embodiment comprises the 4th convex lens 315 that protrusion direction is identical with the image projection direction along optical axis 5 in regular turn by the place ahead to rear, second non-spherical lens 316, second biconcave lens 317, another non-spherical lens 319 that the 5th convex lens 318 that protrusion direction is opposite with the image projection direction and protrusion direction are opposite with the image projection direction, and the second lens group 32 be arranged at the first lens group 31 the rear and with its at a distance of one first distance, first distance is D2 in the present embodiment, and it is made of protrusion direction the 6th convex lens 322 opposite with the image projection direction.In addition, the external diameter R3 of the first lens group 31 is less than the external diameter R4 of the second lens group 32.
See also Fig. 5, it is for the optical texture synoptic diagram of the present invention's the 3rd preferred embodiment.The 3rd preferred embodiment and the difference of second preferred embodiment are the second lens group 32 different on optical texture.Wherein, the second lens group 32 of the 3rd preferred embodiment is made up of first biconvex lens 323 and second biconvex lens 324, and first biconvex lens 323 and second biconvex lens 324 are at a distance of a second distance D3, learn the equivalent focal length of camera lens 3 by changing the adjustable lay the grain of this second distance D3, that is the length of increase second distance D3 can increase the equivalent focal length of optical lens 3.
Wherein, combination by the optical texture described in the above preferred embodiment, make the first lens group 31 have positive diopter, and first non-spherical lens 314 and another non-spherical lens 319 are all in order to reduce aberration, moreover, the crescent lens 311 that more replace in first preferred embodiment with second non-spherical lens 316 in the second and the 3rd preferred embodiment make the aberration of the lens group group 31 of winning more level off to zero.And the formation of the second lens group 32 also makes the second lens group 32 have positive diopter, and in order to will from and refract to the first lens group 31 perpendicular to the light source 6 of image display device 4.In addition, the 3rd convex lens 321 or the 6th convex lens 322 also can be a Fresnel (Fresnel) lens 325, see also Fig. 6, it is the Fresnel Lenses synoptic diagram of preferred embodiment of the present invention, because Fresnel Lenses 325 is thinner than general convex lens, but has identical optical performance with general convex lens, can make light source 6 refractions and focus to a place, therefore the present invention utilizes Fresnel Lenses 325 to replace general convex lens, can reduce the volume of the second lens group 32, and optical lens 3 is more dwindled.Moreover the length that changes first distance D 1 or D2 can also be used for adjusting the equivalent focal length of optical lens 3.
Because the combination of the optical texture of first and second lens group 31,32 of the present invention and design all make those lens groups 31,32 produce levels off to zero aberration, aperture mirror light hurdle (seeing also Fig. 2) in the alternative prior art between between those lens groups is in order to the effect of aberration correction, so the present invention does not influence its original projection performance with the place ahead that aperture mirror light hurdle 33 is arranged at the first lens group 31.
What specify is, because aperture mirror light hurdle 33 is arranged at the place ahead of the first lens group 31, makes that first distance D 1 or the D2 of 31,32 of first and second lens groups are shortened, and has reduced the volume of optical lens 3.Moreover, since the external diameter R1 of the first lens group 31 or R3 respectively less than the external diameter R2 of the second lens group 32 or and R4, make that the volume on the aperture mirror light hurdle 33 that is arranged in the first lens group, 31 the place aheads is little many compared to the volume on the aperture mirror light hurdle (see also Fig. 2) of prior art between between those lens groups.
See also Fig. 7 and Fig. 8, Fig. 7 is the surface structure synoptic diagram of the present invention's first preferred embodiment, and Fig. 8 is the part-structure synoptic diagram of the present invention's first preferred embodiment.First shell 34 is in order to ladle cover first lens group 31 and aperture mirror light hurdle 33, and second shell 35 is in order to the ladle cover second lens group 32, and first shell 34 is linked to second shell 35.Please consult Fig. 3 synchronously, because the external diameter of the 3rd convex lens 321 is greater than the length of image display device 4 and wide, make the 3rd convex lens 321 around partly do not receive from and perpendicular to the light source of image display device 4, therefore will partly remove (as shown in Figure 8) around the second lens group 32, help further to reduce the volume of optical lens 3.
See also Fig. 9 and Figure 10, Fig. 9 is the surface structure synoptic diagram of the present invention's second preferred embodiment, and Figure 10 is the surface structure diagrammatic cross-section of the present invention's second preferred embodiment, and please cooperate synchronously consult shown in Figure 4.Furthermore, the 3rd shell 36 is in order to ladle cover first lens group 31 and aperture mirror light hurdle 33, and the shell 37 is in order to the ladle cover second lens group 32 all round, and the 3rd shell 36 is linked to the shell 37 all round; Wherein,, therefore (as shown in figure 10) removed in the non-use zone of the 6th convex lens 322, also help to reduce the volume of optical lens 3 because light source 6 is refracted to the subregion that the first lens group 31 only need use the 6th convex lens 322.In addition, the 3rd shell 36 and shell 37 all round links in scalable mode, wherein, the 3rd shell 36 outsides have slide block 361, and all round shell 37 outsides have guidance axis 371, and guidance axis 371 passes slide block 361, make slide block 361 can be along guidance axis 371 toward the F1 directions or the F2 direction move.
Please continue to consult Figure 11 and Figure 12, Figure 11 is the surface structure synoptic diagram of preferred embodiment of the present invention under non-working condition, and Figure 12 is the surface structure diagrammatic cross-section of preferred embodiment of the present invention under non-working condition.Under the non-working condition of projector, slide block 361 can be moved to the B place by the A place toward the F1 direction, make the 3rd shell 36 can be recessed in all round in the shell 37, in order to shorten first distance of 32 of the first lens group 31 and the second lens groups, and then make optical lens 3 shorter and smaller, make that projector is more convenient carries.
Though the present invention discloses as above by previous embodiment, yet these embodiment are not in order to limiting the present invention, and therefore all other changes or modify not breaking away from the equivalence of being finished under the disclosed spirit, all should be included in protection scope of the present invention.
Claims (18)
1. optical lens that is applied to small-sized projector in order to image projection to a projection surface with image display device, is exaggerated the image of this image display device and is shown on this projection surface, and it is characterized in that: this optical lens comprises:
The first lens group comprises at least one non-spherical lens, in order to revise aberration;
The second lens group, its be arranged at the first lens group the rear and with this first lens group at a distance of first distance, and in order to will from and refract to this first lens group perpendicular to the light source of this image display device; Wherein, by changing this first distance between this first lens group and this second lens group, to adjust the equivalent focal length of this optical lens; And
Aperture mirror light hurdle is arranged at the place ahead of this first lens group, in order to regulate the light transmission capacity of this optical lens.
2. optical lens as claimed in claim 1, it is characterized in that: this first lens group has positive diopter, and it comprises first non-spherical lens that at least one protrusion direction first convex lens identical with the image projection direction are opposite with the image projection direction with a protrusion direction.
3. optical lens as claimed in claim 2 is characterized in that: this first lens group also comprises protrusion direction crescent lens, biconcave lens and the protrusion direction identical with the image projection direction second convex lens opposite with the image projection direction.
4. optical lens as claimed in claim 2 is characterized in that: this first lens group also comprises protrusion direction second non-spherical lens, biconcave lens and the protrusion direction identical with the image projection direction second convex lens opposite with the image projection direction.
5. optical lens as claimed in claim 1 is characterized in that: this second lens group has positive diopter, comprises the 3rd convex lens that at least one protrusion direction is opposite with the image projection direction.
6. optical lens as claimed in claim 1, it is characterized in that: this second lens group has positive diopter, comprise at least one first biconvex lens and one second biconvex lens, wherein this first biconvex lens and this second biconvex lens are at a distance of a second distance, and by changing this second distance, to adjust the equivalent focal length of this optical lens.
7. optical lens as claimed in claim 5 is characterized in that: the 3rd convex lens are Fresnel Lenses.
8. optical lens as claimed in claim 1 is characterized in that: the external diameter of this first lens group is less than the external diameter of this second lens group.
9. optical lens as claimed in claim 1 is characterized in that: this optical lens can shorten this first distance between this first lens group and this second lens group when non-working condition.
10. small-sized projector with camera lens Telescopic is characterized in that: comprising:
Image display device is in order to display image;
Optical lens in order to this image projection to one projection surface, is exaggerated this image and is shown on this projection surface; This optical lens comprises the first lens group, the second lens group and aperture mirror light hurdle, and this aperture mirror light hurdle is arranged at the place ahead of this first lens group, and this second lens group is arranged at the rear of this first lens group;
First shell is in order to this first lens group of ladle cover and this aperture mirror light hurdle; And
Second shell is in order to this second lens group of ladle cover;
Wherein, this first shell and this second shell link in scalable mode, and when this small-sized projector during at non-working condition, this first shell can be recessed in this second shell.
11. small-sized projector as claimed in claim 10, it is characterized in that: this first lens group and this second lens group all have positive diopter, and this first lens group comprises at least one non-spherical lens, and this second lens group be arranged at this first lens group rear and with this first lens group at a distance of one first distance, and in order to will from and refract to this first lens group perpendicular to the light source of this image display device; Wherein, by changing this first distance between this first lens group and this second lens group, to adjust the equivalent focal length of this optical lens.
12. small-sized projector as claimed in claim 11 is characterized in that: this first lens group comprises first non-spherical lens that at least one protrusion direction first convex lens identical with the image projection direction are opposite with the image projection direction with a protrusion direction.
13. small-sized projector as claimed in claim 12 is characterized in that: this first lens group also comprises protrusion direction crescent lens, biconcave lens and the protrusion direction identical with the image projection direction second convex lens opposite with the image projection direction.
14. small-sized projector as claimed in claim 12 is characterized in that: this first lens group also comprises protrusion direction second non-spherical lens, biconcave lens and the protrusion direction identical with the image projection direction second convex lens opposite with the image projection direction.
15. small-sized projector as claimed in claim 11 is characterized in that: this second lens group comprises the 3rd convex lens that at least one protrusion direction is opposite with the image projection direction.
16. small-sized projector as claimed in claim 11, it is characterized in that: this second lens group comprises at least one first biconvex lens and one second biconvex lens, wherein this first biconvex lens and this second biconvex lens are at a distance of a second distance, and by changing this second distance, to adjust the equivalent focal length of this optical lens.
17. small-sized projector as claimed in claim 10 is characterized in that: the external diameter of this first lens group is less than the external diameter of this second lens group.
18. small-sized projector as claimed in claim 10 is characterized in that: this first shell has slide block, and this second shell has guidance axis, and this guidance axis passes this slide block, and this slide block is moved along this guidance axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101615515A CN101988983A (en) | 2009-07-31 | 2009-07-31 | Optical lens applied to small projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101615515A CN101988983A (en) | 2009-07-31 | 2009-07-31 | Optical lens applied to small projector |
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| Publication Number | Publication Date |
|---|---|
| CN101988983A true CN101988983A (en) | 2011-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101615515A Pending CN101988983A (en) | 2009-07-31 | 2009-07-31 | Optical lens applied to small projector |
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| CN (1) | CN101988983A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540647A (en) * | 2012-01-13 | 2012-07-04 | 深圳市保千里电子有限公司 | Optical lens device with adjustable illumination scope and realizing method thereof |
| WO2017092665A1 (en) * | 2015-11-30 | 2017-06-08 | 深圳市光峰光电技术有限公司 | Lighting device |
| CN113933971A (en) * | 2021-10-29 | 2022-01-14 | 歌尔光学科技有限公司 | Projection lens and projection device |
-
2009
- 2009-07-31 CN CN2009101615515A patent/CN101988983A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540647A (en) * | 2012-01-13 | 2012-07-04 | 深圳市保千里电子有限公司 | Optical lens device with adjustable illumination scope and realizing method thereof |
| CN102540647B (en) * | 2012-01-13 | 2013-09-25 | 深圳市保千里电子有限公司 | Optical lens device with adjustable illumination scope and realizing method thereof |
| WO2017092665A1 (en) * | 2015-11-30 | 2017-06-08 | 深圳市光峰光电技术有限公司 | Lighting device |
| US10746357B2 (en) | 2015-11-30 | 2020-08-18 | Ylx Incorporated | Lighting device having polychromatic light source and optical element with light filter having through hole |
| CN113933971A (en) * | 2021-10-29 | 2022-01-14 | 歌尔光学科技有限公司 | Projection lens and projection device |
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Open date: 20110323 |