CN101556424A - Projecting apparatus - Google Patents
Projecting apparatus Download PDFInfo
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- CN101556424A CN101556424A CNA2009100074818A CN200910007481A CN101556424A CN 101556424 A CN101556424 A CN 101556424A CN A2009100074818 A CNA2009100074818 A CN A2009100074818A CN 200910007481 A CN200910007481 A CN 200910007481A CN 101556424 A CN101556424 A CN 101556424A
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- 238000003384 imaging method Methods 0.000 claims abstract description 17
- 230000003287 optical effect Effects 0.000 claims abstract description 16
- 230000000007 visual effect Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000005499 meniscus Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
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Abstract
A projecting apparatus comprises: a projecting lens, wherein the projecting lens comprises a first lens group with an imaging optical axis and a first effective refractive index and a second lens group with a second effective refractive index; and an image generating device with a light valve, wherein the second lens group is installed between the first lens group and light valve, the light valve transmits a projection light generated by the image generating device to the projecting lens, the projecting light generates an intermediate image through the second lens group, the intermediate image is focused on a projecting screen to generate an image through the first lens group, the centers of the image and the light valve are positioned at the same side of the imaging optical axis, and the center of the intermediate image is positioned at the other side of the imaging optical axis. The invention has the characteristic of ultra wide angle and the advantages of simple assembly, low manufacturing cost, etc.
Description
Technical field
The invention relates to a kind of projection arrangement, and particularly relevant for a kind of projection arrangement of tool wide-angle characteristic.
Background technology
For bigger projecting space such as large conference room or speech meeting-place, usually must the bigger projected picture of collocation.Yet the projected picture limited size of projection arrangement is in the structural design of projection lens.Also therefore, wide angle projection lens is applied in the projection arrangement.Yet; mostly wide angle projection lens is to adopt Polaroid principle to make traditionally; this technology can cause too big or the needs collocation of pre-group eyeglass usually, and other for example is reflecting surface mirror or the lens with special minute surface, makes cost of manufacture higher, and is difficultly accepted by market.
Summary of the invention
The invention relates to a kind of throwing projection arrangement, it possesses the characteristic of super wide-angle, and has the advantage easily assembled, that manufacturing cost is lower etc.
According to the present invention, a kind of projection arrangement is proposed, in order to an image is projected on the projection screen, this projection arrangement comprises projection lens and image generation device.Image generation device has light valve.Projection lens comprises first group of lens and second group of lens.First group of lens has the imaging optical axis and first effective refractive index.Second group of lens has second effective refractive index, and second group of lens is arranged between first group of lens and the light valve.Light valve transmits a projection light of image generation device generation to projection lens, and projection light produces an intermediate imagery through second group of lens.Intermediate imagery sees through first group of lens focus again and produce an image on projection screen.The center of image and the centre bit of light valve are in the same side of imaging optical axis, and the center of intermediate imagery is an opposite side at the imaging optical axis then.
For foregoing of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below:
Description of drawings
Fig. 1 is the synoptic diagram according to a kind of projection arrangement of preferred embodiment of the present invention.
Fig. 2 is the synoptic diagram that the present embodiment projection arrangement is used the secondary imaging notion.
Fig. 3 is the light path simulation drawing of wide-angle lens group under different focal.
Fig. 4 is the simulation drawing of projection arrangement projection under the parameter condition of table 1 of Fig. 1.
Embodiment
Please refer to Fig. 1, it is not according to the synoptic diagram of a kind of projection arrangement of preferred embodiment of the present invention.Projection arrangement 10 comprises a projection lens 100 and an image generation device 200.Image generation device 200 has a light valve 210 in order to provide an image projection light to projection lens 100, it for example is a digital micro-mirror assembly (digitalmicro-mirror device, but not as limit, any device that reaches this function all can adopt DMD).Projection lens 100 comprises first group of lens 110 and second group of lens 120, and wherein, second group of lens 120 is arranged between first group of lens 110 and the light valve 210.First group of lens 110 has an imaging optical axis Ix and one first effective refractive index (effective refractive power).Second group of lens 120 has one second effective refractive index.As shown in Figure 1, projection lens 100 more comprises one the 3rd group of lens 130, and it is arranged between the first group of lens 110 and the second group of lens 120, and has one the 3rd effective refractive index.First effective refractive index, second effective refractive index and the 3rd effective refractive index that first group of lens 110 of present embodiment, the second group of lens 120 and the 3rd group of lens 130 have respectively are all a positive effective refractive index.
And please refer to Fig. 2, it uses the synoptic diagram of secondary imaging notion for the present embodiment projection arrangement.Light valve 210 is arranged on position P1, after its projection light is incident to projection lens 100, an intermediate imagery of standing upside down can be produced at position P2 earlier, then, this intermediate imagery can see through projection lens 100 once more, to form a upright image that amplifies on the projection screen of position P3.
In Fig. 1, light valve 210 transmits a projection light of image generation device 200 generations to projection lens 100, and projection light sees through second group of lens, 120 meeting generation intermediate imagery.The 3rd group of lens 130 can transmit this intermediate imagery to the first group lens 110, and its purpose departs from imaging optical axis Ix distance and dwindles when making projection light to the first group lens 110.Intermediate imagery sees through first group of lens 110 again and focuses on projection screen 300 (see figure 2)s to produce an image.The projection lens 100 of present embodiment makes the centre bit of the center of image and light valve 210 in the same side of imaging optical axis Ix, the center of intermediate imagery then the position at the opposite side of imaging optical axis Ix.The formation of each group lens below is described one by one.
First group of lens 110 is a wide-angle lens group (wide angle lenses), and the scope of its effective focal length Fw is preferably 4mm≤Fw≤7mm.And please refer to Fig. 3, it is the light path simulation drawing of wide-angle lens group under different focal.Because when effective focal length Fw during less than lower limit 4mm (with reference to the legend of below), the total length of projection lens 100 will increase fast, causes cost to increase, and the design of wide-angle lens group is comparatively difficult.And, can cause the lens of wide-angle lens group excessive as effective focal length Fw during greater than upper limit 7mm (with reference to the legend of the top), and also can cause the difficulty in the manufacturing and the increase of cost, in addition, also can cause the interference problem of other two groups of lens 130,120.Therefore, preferably limit effective focal length Fw position in the scope of 4mm to 7mm, can avoid the problems referred to above.As shown in Figure 1, first group of lens 110 is made up of several lens, as lens L1 to L6.With preferred implementation, lens L1 is a meniscus, and lens L2 is a biconcave lens, and lens L3 is a meniscus, and lens L4 is a biconvex lens, and lens L5 is a concave-convex lens, and lens L6 also is a meniscus.
The 3rd group of lens 130 for example are a field lens group (field lenses), and the scope of its effective focal length Ff is preferably 75mm≤Ff≤95mm.The 3rd group of lens 130 can be made of lens L7 and L8.With preferred implementation, lens L7 is a concave-convex lens, and L8 is a biconvex lens.
Second group of lens 120 for example is an extension mirror group (relay lenses), and the scope of its effective focal length Fr is preferably 35mm≤Fr≤55mm.Second group of lens 120 comprises a smooth hurdle 122, and light hurdle 122 is in order to the throughput of control projection light.Second group of lens 120 can be made up of several lens, as lens L9 to L18.With preferred implementation, lens L9 is a meniscus, lens L10 is a meniscus, and lens L11 also is a concave-convex lens, and lens L12 is a meniscus, lens L13 is a biconcave lens, lens L14 is a biconvex lens, and lens L15 is a meniscus, and lens L16 also is a biconvex lens, and lens L17 is a biconvex lens, and lens L18 is a concave-convex lens.
The projection visual angle of projection lens 100 is at least 120 degree angles, and 300 the pass apart from d and projection screen 300 its width W is d/W≤1 from projection lens 100 to projection screen.For instance, when projection lens 100 and projection screen 300 be 1m apart from d the time, can project the wide screen size of 100cm.
The optical data and the configuration of above-mentioned first group of lens of present embodiment 110, second group of lens 120 and the 3rd group of lens 130 each lens are recited in the table 1, and right technology of the present invention is not limited thereto.Lens data in the table 1 is to arrange according to projection screen 300 to the lens configuration sequencing of 210 of light valves.And please refer to Fig. 4, it is the simulation drawing of projection arrangement projection under the parameter condition of table 1 of Fig. 1.
Table 1
| Lens | * minute surface | Radius-of-curvature (m) | Thickness/distance (mm) | Refractive index Nd, Abbe number Vd |
| L1 | 1 | 0.0277 | 3.3959 | 1.806，40.9 |
| 2 | 0.0556 | 13.0121 | ||
| L2 | 3 | -0.0113 | 2.5144 | 1.531，56.0 |
| 4 | 0.0358 | 1.3170 | ||
| 5 | 0.0000 | 11.9037 | ||
| |
6 | 0.0091 | 8.0000 | 1.805，25.4 |
| |
7 | 0.0455 | 6.9664 | 1.697，48.5 |
| 8 | -0.0660 | 1.7531 | ||
| L5 | 9 | -0.1886 | 5.4878 | 1.625，35.7 |
| 10 | -0.1770 | 0.7390 | ||
| L6 | 11 | 0.0642 | 7.7419 | 1.805，25.4 |
| 12 | 0.0535 | 46.0616 | ||
| L7 | 13 | -0.0301 | 8.0000 | 1.531，56.0 |
| 14 | -0.0354 | 48.5608 | ||
| L8 | 15 | 0.0025 | 6.5885 | 1.755，52.3 |
| 16 | -0.0088 | 32.4716 | ||
| L9 | 17 | 0.0334 | 7.7425 | 1.743，49.3 |
| 18 | 0.0163 | 9.5336 | ||
| L10 | 19 | 0.0234 | 4.4020 | 1.784，26.3 |
| 20 | 0.0681 | 9.4430 | ||
| L11 | 21 | -0.0461 | 6.1312 | 1.805，25.4 |
| 22 | -0.0386 | 10.5004 | ||
| L12 | 23 | 0.0406 | 5.4904 | 1.805，25.4 |
| 24 | 0.0026 | 10.0033 | ||
| L13 | 25 | -0.0393 | 2.6426 | 1.806，40.9 |
| L14 | 26 | 0.0356 | 5.1009 | 1.620，60.2 |
| 27 | -0.0451 | 4.3934 | ||
| L15 | 28 | -0.0027 | 1.2645 | 1.755，27.5 |
| L16 | 29 | 0.0586 | 4.4606 | 1.497，81.5 |
| 30 | -0.0425 | 0.1000 | ||
| L17 | 31 | 0.0384 | 3.9240 | 1.516，64.1 |
| L18 | 32 | -0.0563 | 4.0471 | 1.805，25.4 |
| 33 | -0.0030 | 24.0000 | ||
| 34 | 0.0000 | 1.0500 | 1.487，70.2 | |
| 35 | 0.0000 | 0.55 |
* minute surface is to be numbered in regular turn to the direction of light valve 210 by the minute surface of these projection screen 300 sides.
The lens L1 of first group of lens 110 and projection screen 300 apart from the about 270mm of d (see figure 4), the lens L17 of second group of lens 120 and light valve 210 the distance about 4.5656mm.The effective focal length Fw of first group of lens 110 is 5.14mm, and the effective focal length Ff of the 3rd group of lens 130 is 85.6mm, and the effective focal length Fr of second group of lens 120 is 46.47mm.The effective focal length that these three groups of lens constitute is about 2.8mm.As shown in Figure 4, the projection visual angle of projection lens 100 is about 152 degree, and it meets generally the requirement for wide-angle (visual angle is at least 100 degree) or super wide-angle (greater than 120 degree) projection lens.
General projection lens is with Polaroid principle design, so can produce inverted real image, its light valve and imaging are the not homonymy of position at optical axis, therefore can cause the pre-group eyeglass too big, cause the difficulty of manufacturing technology and the increase of cost, more can't satisfy demand for super wide angle projection lens.In order to reach shorter projection distance, the reflecting surface mirror technology on the non-axle is used widely, yet this technology causes the difficulty in assembling, the manufacturing because of the size that adds the reflecting surface mirror from axle is too big.And the projection arrangement of present embodiment is the conceptual design with secondary imaging, and each group lens are arranged on the same axle, and it is more or less freely to make assembling go up.In addition, its each group lens of the projection lens of present embodiment can have been avoided direct manufacturing optical module by existing combination of lenses, and the difficulty as the lens or the reflecting surface mirror of the specific minute surface of tool need not spend higher manufacturing cost.
Claims (10)
1. projection arrangement, in order to an image is projected on the projection screen, this projection arrangement comprises:
Projection lens comprises:
First group of lens has the imaging optical axis and first effective refractive index; And
Second group of lens has second effective refractive index; And
Image generation device has light valve, and wherein, these second group of lens is arranged between these first group of lens and this light valve, and this light valve transmits a projection light of this image generation device generation to this projection lens;
Wherein, this projection light sees through these second group of lens and produces an intermediate imagery, and this intermediate imagery sees through these first group of lens focus and produce an image on this projection screen;
Wherein, the center of this image and the centre bit of this light valve are in the same side of this imaging optical axis, and the centre bit of this intermediate imagery is at the opposite side of this imaging optical axis.
2. projection arrangement as claimed in claim 1 is characterized in that this first effective refractive index is the first positive effective refractive index, and this second effective refractive index is the second positive effective refractive index.
3. projection arrangement as claimed in claim 2 is characterized in that this projection lens comprises first watch:
The 3rd group of lens, the position and has the 3rd positive effective refractive index between these first group of lens and this second group of lens, and the 3rd group of lens are in order to transmit this intermediate imagery to these first group of lens.
4. projection arrangement as claimed in claim 3 it is characterized in that the 3rd group of lens are a field lens group, and the scope of the effective focal length Ff of this field lens group is: 75mm≤Ff≤95mm.
5. projection arrangement as claimed in claim 2 is characterized in that these first group of lens is a wide-angle lens group, and the projection visual angle of this wide-angle lens group is at least 120 degree angles.
6. projection arrangement as claimed in claim 5 is characterized in that the scope of the effective focal length Fw of this wide-angle lens group is: 4mm≤Fw≤7mm.
7. projection arrangement as claimed in claim 2 is characterized in that these second group of lens is an extension mirror group.
8. projection arrangement as claimed in claim 7 is characterized in that the scope of the effective focal length Fr of this extension mirror group is: 35mm≤Fr≤55mm.
9. projection arrangement as claimed in claim 8 is characterized in that these second group of lens comprises Yi Guanglan, and this light hurdle is in order to control the throughput of this projection light.
10. projection arrangement as claimed in claim 1 is characterized in that the pass apart between the width W of d and this projection screen from this projection lens to this projection screen is: d/W≤1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100074818A CN101556424B (en) | 2009-02-11 | 2009-02-11 | Projecting apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100074818A CN101556424B (en) | 2009-02-11 | 2009-02-11 | Projecting apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN101556424A true CN101556424A (en) | 2009-10-14 |
| CN101556424B CN101556424B (en) | 2011-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100074818A Active CN101556424B (en) | 2009-02-11 | 2009-02-11 | Projecting apparatus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221767A (en) * | 2011-06-29 | 2011-10-19 | 苏州佳世达光电有限公司 | Projector |
| CN103293642A (en) * | 2012-03-02 | 2013-09-11 | 扬明光学股份有限公司 | Projection lens and projection device |
| US8786960B2 (en) | 2011-05-23 | 2014-07-22 | Qisda Corporation | Projection apparatus |
| CN106921855A (en) * | 2017-04-20 | 2017-07-04 | 苏州佳世达光电有限公司 | Projector without prism module, non-telecentricity framework |
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| JP2005509178A (en) * | 2001-03-29 | 2005-04-07 | エリュメンス・コーポレイション | Optical projection system and method |
| JP4418650B2 (en) * | 2003-08-11 | 2010-02-17 | キヤノン株式会社 | Zoom lens and image projection apparatus having the same |
| CN1890593B (en) * | 2003-12-05 | 2010-05-12 | 3M创新有限公司 | Wide-angle projection lens for projection display systems and optical engine |
| JP2007271697A (en) * | 2006-03-30 | 2007-10-18 | Fujinon Corp | Zoom lens for projection and projection type display device |
| JP4864600B2 (en) * | 2006-08-11 | 2012-02-01 | 富士フイルム株式会社 | Projection type zoom lens and projection type display device |
| JP2008304765A (en) * | 2007-06-08 | 2008-12-18 | Canon Inc | Zoom lens and image projection device using the same |
| JP5006113B2 (en) * | 2007-06-12 | 2012-08-22 | 富士フイルム株式会社 | Wide angle zoom lens for projection and projection display device |
| CN101414049B (en) * | 2007-10-18 | 2011-07-20 | 佳世达科技股份有限公司 | Wide-angle projection lens and projection device using same |
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2009
- 2009-02-11 CN CN2009100074818A patent/CN101556424B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8786960B2 (en) | 2011-05-23 | 2014-07-22 | Qisda Corporation | Projection apparatus |
| CN102221767A (en) * | 2011-06-29 | 2011-10-19 | 苏州佳世达光电有限公司 | Projector |
| CN103293642A (en) * | 2012-03-02 | 2013-09-11 | 扬明光学股份有限公司 | Projection lens and projection device |
| CN103293642B (en) * | 2012-03-02 | 2015-08-26 | 扬明光学股份有限公司 | Projection lens and projection device |
| US9348122B2 (en) | 2012-03-02 | 2016-05-24 | Young Optics Inc. | Projection lens including first lens group and second lens group and projection device including planar reflector |
| CN106921855A (en) * | 2017-04-20 | 2017-07-04 | 苏州佳世达光电有限公司 | Projector without prism module, non-telecentricity framework |
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| Publication number | Publication date |
|---|---|
| CN101556424B (en) | 2011-02-16 |
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