CN106646838A - Reflection type ultra-short-focus projection system - Google Patents
Reflection type ultra-short-focus projection system Download PDFInfo
- Publication number
- CN106646838A CN106646838A CN201610990725.9A CN201610990725A CN106646838A CN 106646838 A CN106646838 A CN 106646838A CN 201610990725 A CN201610990725 A CN 201610990725A CN 106646838 A CN106646838 A CN 106646838A
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- Prior art keywords
- lens group
- projection
- projection imaging
- camera lens
- group
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- 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.)
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/24—Optical objectives specially designed for the purposes specified below for reproducing or copying at short object distances
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/02—Catoptric systems, e.g. image erecting and reversing system
- G02B17/04—Catoptric systems, e.g. image erecting and reversing system using prisms only
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/005—Projectors using an electronic spatial light modulator but not peculiar thereto
- G03B21/008—Projectors using an electronic spatial light modulator but not peculiar thereto using micromirror devices
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention discloses a reflection type ultra-short-focus projection system, and belongs to the field of ultra-short-focus technology. The system comprises a front lens group and a rear lens group, the rear lens group comprises a DMD chip and a projection imaging lens group, a rectangular prism is arranged under the DMD chip, light reflected by the rectangular prism enters the projection imaging lens group, multiple lenses in the projection imaging lens group are coaxial, the front lens group includes a sculptured-surface reflector, and the horizontal distance between the rear end of the projection imaging lens group and the front end of the sculptured-surface reflector is 180mm. The sculptured-surface reflector is combined with the projection imaging lens group composed of spherical and aspheric lenses, and the system is a reciprocal optical system. The sculptured surface is expanded to correct trapezoidal deformation an image plane, aberration is corrected by aspheric surfaces, the problem that a short-focus projector tends to cause image distortion, aberration, fuzzy edges and the like is solved, and a better image quality experience is provided. The rectangular prism can reflect light to the maximal limit, and the brightness of a projection frame is ensured.
Description
Technical field
The invention belongs to ultrashort burnt technical field, more particularly to a kind of reflective ultrashort out-of-focus projection's system.
Background technology
Since short focus technology is applied to after projector, just paid close attention to by many people.Short focus technology can be greatly shortened
Projector distance, allows little space to project big picture, has broken away from restriction of the projector distance to projector.At present, China
Develop into the whole world maximum manufacture base and consumption market of video industry Related product and system.Short focus projector not only overcomes
The high light energy direct projection of projector enters speaker's eyes, brings directly stimulation, and the problem of the health that affects one's power of vision has been reached in minimum
Most preferably sharing for clear big picture, and easy for installation, save space are realized in space, good Consumer's Experience can be brought.
In existing technology, realizing the projection of ultrashort Jiao mainly has two kinds of technologies：One kind adopts fish-eye type projection lens
Short focus technology, it is another kind of then be the ultrashort burnt technology using mirror type projection lens.Using the short focus skill of fish-eye type camera lens
Art, due to technical reason, often causes trapezoidal flexural distortion amount very big, so as to cause the curve of projected picture periphery
Often it is bent.Using the ultrashort burnt technology of free form surface lenses/mirrors, not only amount of distortion is little, projected picture deflection
It is little, and projector distance also shortens much compared with the camera lens of fish-eye type.But existed using free-form surface mirror technology and set
Meter method is complicated with computing formula, and the manufacture craft required by it is difficult the problems such as grasping.And commonly use in conventional projection system
Speculum carrys out reflection light, but speculum is not easy to install in projection systems, and can not completely reflection light, cause light
The loss of brightness, affects the brightness of projected picture.
It is 201310604016.9 that State Patent Office discloses a number of patent application on November 25th, 2013, entitled
A kind of patent of invention of the ultrashort out-of-focus projection's camera lens of curved face reflecting type.This patent disclose following technical scheme：Including group after camera lens
With group before camera lens, wherein, before the camera lens group include a camber reflection unit.According to the curved surface that aforesaid way, the present invention are provided
Reflective ultrashort out-of-focus projection's camera lens, is arranged on the forward direction light propagation path organized before camera lens by using group after curved surface camera lens,
Organize after the curved surface camera lens for the light that outgoing is organized after camera lens to be reflected away, so as to realize the purpose of ultrashort out-of-focus projection, and
Increased the angle of visual field.But this patent adopts the off-axis formula eyeglass of multi-disc, matching requirements are high.
It is 201420149792.4 that State Patent Office discloses a number of patent application on March 28th, 2014, entitled
A kind of patent of invention of reflective ultrashort out-of-focus projection's system.This patent disclose following technical scheme：Including reflective ultrashort Jiao
Projecting apparatus, computer and infrared exoelectron pen, the Single port on the computer passes through or video line and reflective ultrashort burnt throwing
Single port on shadow instrument is connected, and the Two-port netwerk on the computer is by two ends on connecting line and reflective ultrashort out-of-focus projection's instrument
Mouth is connected, and in reflective ultrashort out-of-focus projection's instrument infrared image sensor is provided with.The present invention can be projected with very-short-reach, section
Space is about used, high definition, use cost is projected.But this patent size is larger, it has not been convenient to carry.
The content of the invention
The problem to be solved in the present invention be to provide it is a kind of it is easy to carry, be easily installed and bring the anti-of more preferable image quality experience
Penetrate the lens group of the ultrashort out-of-focus projection's instrument of formula.For this purpose, now proposing following technical scheme.
A kind of reflective ultrashort out-of-focus projection's system, including reflective ultrashort out-of-focus projection's camera lens, the reflective ultrashort burnt throwing
Shadow camera lens include camera lens before group and with the camera lens before group with identical primary optical axis camera lens after group, group includes after the camera lens
Dmd chip and projection imaging lens group, the dmd chip lower section is provided with a right-angle prism, and the light that light source sends passes through DMD cores
Piece reflects into right-angle prism, the light after reflection enter projection imaging lens group, the projection imaging lens group with it is described
The center of right-angle prism is on a horizontal line and the projection imaging lens group is with this horizontal line as axle, is placed with from back to front
Multi-disc spheric glass and aspherical lens；It is free-form surface mirror to organize before the camera lens, the free-form surface mirror center
The horizontal line 25mm is upwardly deviated from, is tilted to the right 8 °；The rear end of the projection imaging lens group and free-form surface mirror
Horizontal range between front end is 180mm.
Further improvement of these options, the projection imaging lens group is aspherical including 12 spheric glasses and 2
Eyeglass, wherein first 2 is aspherical lens, afterwards 12 is spheric glass.
Further improvement of these options, the free-form surface mirror is concave mirror or convex mirror.
Compared to existing technology, the beneficial effects of the present invention is：
（1）The present invention combines the projection imaging lens group that free-form surface mirror and sphere, aspheric lens are combined into, structure
Into a kind of refractive and reflective optical system.One aspect of the present invention have modified traditional fisheye projection system using free-form surface mirror extension
In image planes the ill-defined problem of projected picture is caused because of trapezoidal distortion, on the other hand using in projection imaging lens group
Aspherical lens aberration correction, solves the problems, such as that distortion easily occurs in short focus projecting apparatus, and to spectators preferably picture is brought
Plastid is tested.
（2）The present invention adopts right-angle prism as the speculum in optical projection system, because comparing with common speculum, directly
Angle prism is more easily installed, and has more preferable stability and intensity to mechanical stress, beneficial to the assembling in production.Because having always
Angle, light can all be reflected into projection imaging lens group, not result in the loss of light luminance, it is ensured that projected picture
Brightness.
（3）The center deviation horizontal line 25mm of the free-form surface mirror, is deviated to the right 8 °, is changed by such design
Light path, increases light path, reaches the drop shadow effect of ultrashort Jiao, also add the angle of visual field.And the rear end of projection imaging lens group and from
It is 180mm by the horizontal range between the front end of curved reflector, reduces the size of whole optical projection system, fully meets mini
Portable projection requirements.
（4）Projection imaging group is designed to the assembling of multi-disc eyeglass coaxial-type by the present invention, the assembling being easy in producing.
Description of the drawings
Fig. 1 is a kind of structural representation of reflective ultrashort out-of-focus projection's system of the present invention.
Reference：Dmd chip -1；Right-angle prism -2；Projection imaging lens group -3；Free-form surface mirror -4；Level
Line -5.
Specific embodiment
Technological means, creation characteristic, reached purpose and effect to make present invention realization is easy to understand, with reference to
Specific embodiment, is expanded on further the present invention.
A kind of reflective ultrashort out-of-focus projection's system as shown in Figure 1, including reflective ultrashort out-of-focus projection's camera lens, it is described anti-
Penetrate the ultrashort out-of-focus projection's camera lens of formula including group before camera lens and with the camera lens before group after camera lens of the group with identical primary optical axis, it is described
Group includes dmd chip 1 and projection imaging lens group 3 after camera lens, and the lower section of the dmd chip 1 is provided with a right-angle prism 2, and light source is sent out
The light for going out is reflected by dmd chip 1 into right-angle prism 2, and the light after reflection enters projection imaging lens group 3, described
Projection imaging lens group 3 is with the center of the right-angle prism 2 is on a horizontal line 5 and the projection imaging lens group 3 is with this
Horizontal line 5 is axle, and multi-disc spheric glass and aspherical lens are placed with from back to front；Organize before the camera lens as free form surface reflection
Mirror 4, the center of the free-form surface mirror 4 is upwardly deviated from the horizontal line 25mm, is deviated to the right 8 °；It is such to be designed to
Allow free-form surface mirror to change light path, increase light path, reach the drop shadow effect of ultrashort Jiao；The projection imaging lens group 3
Horizontal range between the front end of rear end and free form surface transmitting mirror 4 is 180mm, and the size of reduced projection system can be abundant
Meet mini portable moral and project demand.
The projection imaging lens group 3 that the present invention is combined into free-form surface mirror 4 with sphere, aspheric lens is mutually tied
Close, constitute a kind of refractive and reflective optical system.One aspect of the present invention have modified traditional flake and throws using the extension of free-form surface mirror 4
Image planes in shadow system because causing the ill-defined problem of projected picture because of trapezoidal distortion, on the other hand using projection imaging mirror
Aspherical lens aberration correction in head group 3, solves the problems, such as that distortion easily occurs in short focus projecting apparatus, brings to spectators
Preferably image quality experience.And the present invention adopts right-angle prism 2 as the speculum in optical projection system, compared with normal mirror,
Right-angle prism 2 is more easily installed, and has more preferable stability and intensity to mechanical stress, beneficial to the assembling in production.Because having
One right angle, light can all be reflected into projection imaging lens group 3, not result in the loss of light luminance, it is ensured that projection
The brightness of picture.
In the present embodiment, the projection imaging lens group 3 includes 12 spheric glasses and 2 aspherical lens, wherein
First 2 is aspherical lens, and afterwards 12 is spheric glass.Projection imaging group 3 is designed to multi-disc eyeglass coaxial-type group by the present invention
Dress, the assembling being easy in producing.
In the present embodiment, the free-form surface mirror 4 is concave mirror or convex mirror.
Those of ordinary skill in the art it should be appreciated that the embodiment of the above be intended merely to explanation the present invention,
And be not used as limitation of the invention, as long as in the spirit of the present invention, the change to embodiment described above
Change, modification all will fall in scope of the presently claimed invention.
Claims (3)
1. a kind of reflective ultrashort out-of-focus projection's system, including reflective ultrashort out-of-focus projection's camera lens, the reflective ultrashort burnt throwing
Shadow camera lens include camera lens before group and with the camera lens before group with identical primary optical axis camera lens after group, it is characterised in that：It is described
Group includes dmd chip and projection imaging lens group after camera lens, and the dmd chip lower section is provided with a right-angle prism, what light source sent
Light is reflected by dmd chip into right-angle prism, and the light after reflection enters projection imaging lens group, the projection imaging
On a horizontal line, the projection imaging lens group is axle from rear with this horizontal line at the center of lens group and the right-angle prism
To being front placed with multi-disc spheric glass and aspherical lens；It is free-form surface mirror to organize before the camera lens, the free form surface
The center of speculum is upwardly deviated from the horizontal line 25mm, is tilted to the right 8 °；The rear end of the projection imaging lens group and freedom
Horizontal range between the front end of curved reflector is 180mm.
2. the reflective ultrashort out-of-focus projection's system of one kind according to claim 1, it is characterised in that：The projection imaging camera lens
Group includes 12 spheric glasses and 2 aspherical lens, wherein first 2 is aspherical lens, afterwards 12 is spheric glass.
3. the reflective ultrashort out-of-focus projection's system of one kind according to claim 1, it is characterised in that：The free form surface reflection
Mirror is concave mirror or convex mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610990725.9A CN106646838A (en) | 2016-11-10 | 2016-11-10 | Reflection type ultra-short-focus projection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610990725.9A CN106646838A (en) | 2016-11-10 | 2016-11-10 | Reflection type ultra-short-focus projection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106646838A true CN106646838A (en) | 2017-05-10 |
Family
ID=58806088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610990725.9A Pending CN106646838A (en) | 2016-11-10 | 2016-11-10 | Reflection type ultra-short-focus projection system |
Country Status (1)
| Country | Link |
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| CN (1) | CN106646838A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107015425A (en) * | 2017-03-26 | 2017-08-04 | 南京悦微米智能科技有限公司 | A kind of ultrashort out-of-focus projection's instrument lens systems of LED |
| CN110275382A (en) * | 2019-07-29 | 2019-09-24 | 张羽 | One kind being applied to ultrashort out-of-focus projection's equipment rear-projection reflex reflector lens |
| CN110360884A (en) * | 2019-08-23 | 2019-10-22 | 沂普光电(天津)有限公司 | A kind of reflective red dot rifle of free form surface is taken aim at |
Citations (5)
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| CN101546107A (en) * | 2008-03-28 | 2009-09-30 | 精工爱普生株式会社 | Projection apparatus and image display apparatus |
| CN104570296A (en) * | 2014-12-17 | 2015-04-29 | 深圳市亿思达科技集团有限公司 | Ultra-short focus projection lens |
| WO2016068269A1 (en) * | 2014-10-31 | 2016-05-06 | 日東光学株式会社 | Projection optical system and projector device |
| CN105974560A (en) * | 2015-03-13 | 2016-09-28 | 扬明光学股份有限公司 | Wide-angle projection system and lens |
| CN206270584U (en) * | 2016-11-10 | 2017-06-20 | 南京悦微米智能科技有限公司 | A kind of reflective ultrashort out-of-focus projection's system |
-
2016
- 2016-11-10 CN CN201610990725.9A patent/CN106646838A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101546107A (en) * | 2008-03-28 | 2009-09-30 | 精工爱普生株式会社 | Projection apparatus and image display apparatus |
| WO2016068269A1 (en) * | 2014-10-31 | 2016-05-06 | 日東光学株式会社 | Projection optical system and projector device |
| CN104570296A (en) * | 2014-12-17 | 2015-04-29 | 深圳市亿思达科技集团有限公司 | Ultra-short focus projection lens |
| CN105974560A (en) * | 2015-03-13 | 2016-09-28 | 扬明光学股份有限公司 | Wide-angle projection system and lens |
| CN206270584U (en) * | 2016-11-10 | 2017-06-20 | 南京悦微米智能科技有限公司 | A kind of reflective ultrashort out-of-focus projection's system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107015425A (en) * | 2017-03-26 | 2017-08-04 | 南京悦微米智能科技有限公司 | A kind of ultrashort out-of-focus projection's instrument lens systems of LED |
| CN110275382A (en) * | 2019-07-29 | 2019-09-24 | 张羽 | One kind being applied to ultrashort out-of-focus projection's equipment rear-projection reflex reflector lens |
| CN110360884A (en) * | 2019-08-23 | 2019-10-22 | 沂普光电(天津)有限公司 | A kind of reflective red dot rifle of free form surface is taken aim at |
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Application publication date: 20170510 |
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