CN1847923A - Projection optical system and its imaging module and imaging method - Google Patents
Projection optical system and its imaging module and imaging method Download PDFInfo
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- CN1847923A CN1847923A CN 200510065701 CN200510065701A CN1847923A CN 1847923 A CN1847923 A CN 1847923A CN 200510065701 CN200510065701 CN 200510065701 CN 200510065701 A CN200510065701 A CN 200510065701A CN 1847923 A CN1847923 A CN 1847923A
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Abstract
The present invention is projection optical system and its imaging module and imaging method. The projection optical system has one imaging module comprising a imaging error trimming prism, a isosceles triangle prism and a digital micro lens unit and one lens module comprising two lens combinations in optimal arrangement, so that it has 50 % reduced size compared with common projection optical system. The reduced projection optical system is easy to carry and has short optical path and optimal projection effect.
Description
Technical field
The present invention relates to a kind of projection optical system and image-forming module thereof and formation method, especially refer to a kind of optimization permutation and combination that cooperates, reaches two set of shots groups of utilizing image error fine setting prism, isosceles triangle prism and digital micro-mirror device, the shortest to reach the light path path, and projection optical system of drop shadow effect's the best and image-forming module thereof and formation method.
Background technology
See also shown in Figure 1ly, it is the synoptic diagram that the image-forming module of known projection optical system and camera lens module cooperate.As shown in Figure 1, known projection optical system includes: an image-forming module 1a and a camera lens module 2a.Wherein, this image-forming module 1a include a digital micro-mirror device 11a (DigitalMicromirror Device, DMD) and a prism group 12a.This camera lens module 2a includes the first lens group 21a, the second lens group 22a, three-lens group 23a and four-barrel group 24a at least, by moving mutually of this four set of shots group, focus the effect of (adjustment focal length) and zoom (adjusting the window size of projection imaging) to reach.
See also shown in Figure 2ly, it is the process flow diagram of the formation method of known projection optical system.Process flow diagram by Fig. 2 cooperates Fig. 1 as can be known, and the step of the formation method of known projection optical system includes: at first, 12a receives a light beam (step S100) by this prism group; Then, 12a reflects this light beam by this prism group, and this beam reflected is projeced into this digital micro-mirror device 11a (step S102); Then, reflect this light beam (step S104) again by this digital micro-mirror device 11a; Then, receive beam reflected again by this prism group 12a, and make this light beam penetrate this prism group 12a (step S106) from this digital micro-mirror device 11a institute; At last, receive the light beam (step S108) that penetrates this prism group 12a by the first lens group 21a of this camera lens module 2a, the second lens group 22a, three-lens group 23a and four-barrel group 24a, to reach the purpose of projection imaging to screen 3a.
In order to reach above-mentioned effect, the overall volume of known projection optical system be subject to optical path length, and this image-forming module 1a be difficult for the respective outer side edges of this camera lens module 2a changing.That is optical path length is subject to the simple combination (triangular prisms of a plurality of different angles) of conventional prism group 12 and the labyrinth (cooperations of a plurality of lens group) of conventional lenses module 2a, and can't shorten.
In other words, in order to reach good drop shadow effect, known projection optical system is subject to the textural association of this image-forming module 1a and this camera lens module 2a, and the influence of the optical path length that is produced under the textural association, and can't dwindle its original volume, and, expose dwindling of other projection optics assembly though have because of the present volume of existing projection optical system on the market, but volume is still too huge, and causes the user to portably use easily.
As from the foregoing, above-mentioned known projection optical system on reality is used, obviously has inconvenience and shortcoming, need be improved.
Summary of the invention
Fundamental purpose of the present invention provides a kind of projection optical system and image-forming module and formation method, its image error fine setting prism, isosceles triangle prism that utilizes image-forming module and digital micro-mirror device cooperate and by the optimization permutation and combination of camera lens module with two set of shots groups, volume-diminished being become half size of known projection optical system, and the projection optical system of being dwindled can produce the shortest and effect of drop shadow effect's the best in light path path.
In order to reach above-mentioned purpose, the invention provides a kind of projection optical system, include: have the image-forming module of digital micro-mirror device and prism group and have first lens group and the camera lens module of second lens group.Wherein, this prism group has image error fine setting prism and the isosceles triangle prism that cooperatively interacts with this digital micro-mirror device.This camera lens module is arranged at a side of this image-forming module, and this second lens group is arranged at a side of this first lens group, is used for producing with this first lens group relatively moving to adjust focal length.
Wherein, this prism group is used to receive a light beam and allows this light beam to penetrate, and the light beam that this penetrates is projeced into this digital micro-mirror device to produce reflection.This isoceles triangle shape prism is used for receiving from this digital micro-mirror device institute beam reflected, and reflects this light beam again.This first lens group is used for receiving from this isoceles triangle shape prism institute's beam reflected and allows this light beam to penetrate.This second lens group is used to receive the light beam that penetrated from this first lens group with projection imaging.
In order to reach above-mentioned purpose, the invention provides a kind of formation method of projection optical system, its step includes: at first, one image-forming module with a digital micro-mirror device and a prism group, an and camera lens module with one first lens group and one second lens group are provided, and wherein this prism group has an isoceles triangle shape prism; Then, receive a light beam, and this light beam penetrates this image-forming module by this image-forming module; Then, make the light beam that penetrates this image-forming module be projeced into this digital micro-mirror device; Next, make be projeced into this digital micro-mirror device beam reflection in this isoceles triangle shape prism; By this isoceles triangle shape prism, reflection is from this digital micro-mirror device institute beam reflected; Then, receive from this isoceles triangle shape prism institute beam reflected, and this light beam penetrates this first lens group; Then, by this second lens group, receive and penetrate the light beam of this first lens group with projection imaging; At last, move the spacing of this first lens group and this second lens group, to be adjusted to the focal length of picture.
Reach technology, means and the effect that predetermined purpose is taked in order further to understand the present invention, see also following about detailed description of the present invention and accompanying drawing, believe purpose of the present invention, feature and characteristics, go deep into and concrete understanding when getting one thus, yet accompanying drawing only provides reference and explanation usefulness, is not to be used for the present invention is limited.
Description of drawings
Fig. 1 is the image-forming module of known projection optical system and the synoptic diagram of camera lens module;
Fig. 2 is the process flow diagram of the formation method of known projection optical system;
Fig. 3 is the image-forming module of projection optical system of the present invention and the synoptic diagram of camera lens module; And
Fig. 4 is the process flow diagram of the formation method of projection optical system of the present invention.
Embodiment
See also shown in Figure 3ly, it is for the synoptic diagram of the image-forming module of projection optical system of the present invention and camera lens module.As shown in Figure 3, the invention provides a kind of projection optical system, it includes: an image-forming module 1 and a camera lens module 2.
Wherein, this image-forming module 1 has a digital micro-mirror device 11 and a prism group 12.This prism group 12 has an image error fine setting prism 121 and an isoceles triangle shape prism 122 that cooperatively interacts with this digital micro-mirror device 11.Three interior angles of this isoceles triangle shape prism 122 are 45 degree, 45 degree and 90 degree, can reach the shortest optical path length when it is used to make beam reflection.In addition, this prism group 12 is used to receive a light beam and allows this light beam to penetrate, and make the big radian of this light beam ground yawing moment, and the light beam that this prism group 12 can penetrate this is projeced into this digital micro-mirror device 11 to produce reflection, and this image error fine setting prism 121 is used to finely tune the light path path of the light beam that is projeced into this digital micro-mirror device 11, and this isoceles triangle shape prism 122 is used for receiving from 11 beam reflected of this digital micro-mirror device, and reflects this light beam again.
Wherein, this camera lens module 2 is arranged at a side of this image-forming module 1, and this camera lens module 2 includes: first lens group 21 and second lens group 22.This second lens group 22 is arranged at a side of this first lens group 21, is used for relatively moving to adjust focal length with 21 generations of this first lens group.In addition, this first lens group 21 is used for receiving from 122 beam reflected of this isoceles triangle shape prism and allows this light beam to penetrate, and this second lens group 22 be used to receive the light beam that penetrated from this first lens group 21 with projection imaging in a screen 3.Length between this first lens group and this second lens group adjusts between 42.73 to 43.07 millimeters.Yet this length is one of them embodiment of the present invention, and is not used in qualification the present invention.
In addition, this first lens group 21 also has first eyeglass 211, second eyeglass 212, prismatic glasses 213, the 4th eyeglass 214, the 5th eyeglass 215 and the 6th eyeglass 216,0.2 millimeter at interval of the center of this first eyeglass 211 and this second eyeglass 212,0.23 millimeter at interval of the center of this second eyeglass 212 and this prismatic glasses 213, this prismatic glasses 213 is connected together with the 4th eyeglass 214, the center of the 4th eyeglass 214 and the 5th eyeglass 215 is separated by 3.26 millimeters, and the center of the 5th eyeglass 215 and the 6th eyeglass 216 is separated by 3.88 millimeters.Yet the center distance of these eyeglasses of this first lens group 21 is one of them embodiment of the present invention, and is not used in qualification the present invention.
And, this second lens group 22 has first eyeglass 221, second eyeglass 222 and the prismatic glasses 223,2.72 millimeters at interval of the centers of this first eyeglass 221 and this second eyeglass 222, and 2.86 millimeters at interval of the centers of this second eyeglass 222 and this prismatic glasses 223.Yet the center distance of these eyeglasses of this second lens group 22 is one of them embodiment of the present invention, and is not used in qualification the present invention.
See also shown in Figure 4ly, it is the process flow diagram of the formation method of projection optical system of the present invention.Process flow diagram by Fig. 4 cooperates Fig. 3 as can be known, the invention provides a kind of formation method of projection optical system, its step includes: at first, one image-forming module 1 with a digital micro-mirror device 11 and a prism group 12, an and camera lens module 2 with one first lens group 21 and one second lens group 22 are provided, wherein this prism group 12 has an image error fine setting prism 121 and an isoceles triangle shape prism 122 (step S200), and wherein this image error fine setting prism 121 and this isoceles triangle shape prism 122 are bonded together; Then, receive a light beam by this image-forming module 1, and this light beam penetrates this image-forming module 1 (step S202).
Then, throw this light beam that penetrates image-forming module 1 in this digital micro-mirror device 11 (step S204); Then, reflect this light beam that is projeced into digital micro-mirror device 11 then, reflect from 11 beam reflected of this digital micro-mirror device (step S208) by this isoceles triangle shape prism 122 in this isoceles triangle shape prism 122 (step S206); Next, receive from 122 beam reflected of this isoceles triangle shape prism, and this light beam penetrates this first lens group 21 (step S210); Continue, by this second lens group, to receive this light beam that penetrates first lens group with projection imaging; At last, move the spacing of this first lens group and this second lens group, to be adjusted to the focal length of picture.
In sum, the present invention utilizes cooperating of this image error fine setting prism 121, this isoceles triangle shape prism 122 and this digital micro-mirror device 11 and by the optimization permutation and combination of the camera lens module 2 with two set of shots groups 21,22, volume-diminished being become half size of known projection optical system, and the projection optical system of being dwindled can produce the shortest and effect of drop shadow effect's the best in light path path.
The above only is the detailed description and the accompanying drawing of one the specific embodiment of the best of the present invention, but feature of the present invention is not limited thereto, be not in order to restriction the present invention, all scopes of the present invention should be as the criterion with following claims, all closing in the embodiment of the spirit variation similar of the present patent application claim with it, all should be contained in the category of the present invention, anyly be familiar with this operator in the field of the invention, can think easily and variation or modify and all can be encompassed in following claim of the present invention.
Claims (13)
1, a kind of projection optical system includes:
Image-forming module, it includes:
Digital micro-mirror device; And
The prism group, it has image error fine setting prism and the isosceles triangle prism that cooperatively interacts with this digital micro-mirror device; And
Camera lens module, it is arranged at a side of this image-forming module, and this camera lens module includes:
First lens group; And
Second lens group, the side that it is arranged at this first lens group is used for relatively moving to adjust focal length with this first lens group generation.
2, projection optical system as claimed in claim 1 is characterized in that, this prism group of received one light beam also allows this light beam to penetrate, and the light beam that this penetrates is projeced into this digital micro-mirror device to produce reflection.
3, projection optical system as claimed in claim 2 is characterized in that, this isoceles triangle shape prism receives from this digital micro-mirror device institute beam reflected, and reflects this light beam again.
4, projection optical system as claimed in claim 3 is characterized in that, this first lens group receives from this isoceles triangle shape prism institute's beam reflected and allows this light beam to penetrate.
5, projection optical system as claimed in claim 4 is characterized in that, this second lens group receives the light beam that penetrated from this first lens group with projection imaging.
6, projection optical system as claimed in claim 1 is characterized in that, the length between this first lens group and this second lens group adjusts between 42.73 to 43.07 millimeters.
7, projection optical system as claimed in claim 1, it is characterized in that, this first lens group has first eyeglass, second eyeglass, prismatic glasses, the 4th eyeglass, the 5th eyeglass and the 6th eyeglass, 0.2 millimeter at interval of the center of this first eyeglass and this second eyeglass, 0.23 millimeter at interval of the center of this second eyeglass and this prismatic glasses, this prismatic glasses and the 4th eyeglass are connected together, the center of the 4th eyeglass and the 5th eyeglass is separated by 3.26 millimeters, and the center of the 5th eyeglass and the 6th eyeglass is separated by 3.88 millimeters.
8, projection optical system as claimed in claim 1, it is characterized in that, this second lens group has first eyeglass, second eyeglass and prismatic glasses, 2.72 millimeters at interval of the centers of this first eyeglass and this second eyeglass, and 2.86 millimeters at the interval, center of this second eyeglass and this prismatic glasses.
9, a kind of image-forming module of projection optical system includes:
Digital micro-mirror device; And
The prism group, it has image error fine setting prism and the isosceles triangle prism that cooperatively interacts with this digital micro-mirror device.
10, image-forming module as claimed in claim 9 is characterized in that, this prism group of received one light beam also allows this light beam to penetrate, and this prism group is projeced into this digital micro-mirror device to produce reflection with this light beam that penetrates.
11, image-forming module as claimed in claim 9 is characterized in that, this isoceles triangle shape prism receives from this digital micro-mirror device institute beam reflected, and reflects this light beam again.
12, a kind of formation method of projection optical system, its step includes:
One image-forming module with a digital micro-mirror device and a prism group, an and camera lens module with one first lens group and one second lens group are provided, and wherein this prism group has an isoceles triangle shape prism;
Receive a light beam, by this image-forming module, this light beam penetrates this image-forming module;
Make the light beam that penetrates this image-forming module be projeced into this digital micro-mirror device;
Make the beam reflection that is projeced into this digital micro-mirror device in this isoceles triangle shape prism;
By this isoceles triangle shape prism, reflection is from this digital micro-mirror device institute beam reflected;
Reception is from this isoceles triangle shape prism institute beam reflected, and this light beam penetrates this first lens group;
By this second lens group, receive and penetrate the light beam of this first lens group with projection imaging; And
Move the spacing of this first lens group and this second lens group, to be adjusted to the focal length of picture.
13, the formation method of projection optical system as claimed in claim 12 is characterized in that, this prism group also includes an image error fine setting prism that is connected with this isoceles triangle shape prism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100657014A CN100429558C (en) | 2005-04-13 | 2005-04-13 | Projection optical system and its imaging module and imaging method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100657014A CN100429558C (en) | 2005-04-13 | 2005-04-13 | Projection optical system and its imaging module and imaging method |
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| CN1847923A true CN1847923A (en) | 2006-10-18 |
| CN100429558C CN100429558C (en) | 2008-10-29 |
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| CNB2005100657014A Expired - Fee Related CN100429558C (en) | 2005-04-13 | 2005-04-13 | Projection optical system and its imaging module and imaging method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108471494A (en) * | 2012-09-11 | 2018-08-31 | 株式会社理光 | Image capture system and imaging optical system |
| CN109557662A (en) * | 2018-12-12 | 2019-04-02 | 无锡和晶科技股份有限公司 | A kind of remote guide-lighting and hot spot direction and the controllable display methods of size |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5619381A (en) * | 1995-06-02 | 1997-04-08 | Texas Instruments Incorporated | Offset zoom lens for reflective light modulators |
| KR100381262B1 (en) * | 2000-08-10 | 2003-04-26 | 엘지전자 주식회사 | Total Internal Reflection Prism System using the Digital Micromirror Device |
| JP4298259B2 (en) * | 2001-11-05 | 2009-07-15 | キヤノン株式会社 | Projection optical system, projection-type image display device, and image projection system |
| JP4107109B2 (en) * | 2003-03-06 | 2008-06-25 | カシオ計算機株式会社 | Projection lens |
| CN2609005Y (en) * | 2003-04-10 | 2004-03-31 | 昂纳明达网络技术（深圳）有限公司 | Wide angle projection optical system possessing long back focal distance |
| JP3757221B2 (en) * | 2003-08-14 | 2006-03-22 | Ｎｅｃビューテクノロジー株式会社 | Projection display |
-
2005
- 2005-04-13 CN CNB2005100657014A patent/CN100429558C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108471494A (en) * | 2012-09-11 | 2018-08-31 | 株式会社理光 | Image capture system and imaging optical system |
| US10816778B2 (en) | 2012-09-11 | 2020-10-27 | Ricoh Company, Ltd. | Image capture system and imaging optical system |
| CN109557662A (en) * | 2018-12-12 | 2019-04-02 | 无锡和晶科技股份有限公司 | A kind of remote guide-lighting and hot spot direction and the controllable display methods of size |
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| Publication number | Publication date |
|---|---|
| CN100429558C (en) | 2008-10-29 |
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Effective date of registration: 20081205 Address after: No. two, 2 East Ring Road, tenth Pine Industrial Zone, Longhua Town, Guangdong City, Shenzhen Province, China: 518109 Co-patentee after: Hon Hai Precision Industry Co., Ltd. Patentee after: Fujin Precision Industry (Shenzhen) Co., Ltd. Address before: Taipei city of Taiwan Province Patentee before: Pulier Science and Technology Co., Ltd. |
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Owner name: HONGFUJIN PRECISION INDUSTRY (SHENZHEN) CO., LTD. Free format text: FORMER OWNER: PULIER SCI-TECH CO., LTD. Effective date: 20081205 |
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Granted publication date: 20081029 |