CN108398846A - A kind of super large projection scope projection optical system - Google Patents
A kind of super large projection scope projection optical system Download PDFInfo
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- CN108398846A CN108398846A CN201810467887.3A CN201810467887A CN108398846A CN 108398846 A CN108398846 A CN 108398846A CN 201810467887 A CN201810467887 A CN 201810467887A CN 108398846 A CN108398846 A CN 108398846A
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- lens
- focal power
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- dmd chip
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- 230000003287 optical effect Effects 0.000 title claims abstract description 33
- 230000003068 static effect Effects 0.000 claims abstract description 8
- 239000011521 glass Substances 0.000 claims description 10
- 239000004568 cement Substances 0.000 claims description 7
- 239000003292 glue Substances 0.000 claims description 3
- 230000004075 alteration Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000000571 coke Substances 0.000 description 4
- 238000009826 distribution Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 206010073261 Ovarian theca cell tumour Diseases 0.000 description 1
- 201000009310 astigmatism Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004579 marble Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 208000001644 thecoma Diseases 0.000 description 1
Classifications
-
- 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
- G03B21/142—Adjusting of projection optics
-
- 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
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
Abstract
The invention discloses a kind of super large projection scope projection optical systems, including dmd chip and speculum, the first static lens group of opposite dmd chip is provided between the dmd chip and speculum, the focal power of first lens group is negative, the second lens group that can be moved between the first lens group of dmd chip is provided between the dmd chip and the first lens group, the focal power of second lens group is just, the third lens group that can be moved between dmd chip and the second lens group is provided between the dmd chip and the second lens group, the focal power of the third lens group is negative, the 4th static lens group of opposite dmd chip is provided between the dmd chip and the third lens group, the focal power of 4th lens group is just.The present invention has many advantages, such as that high-resolution, fine definition, projection scope are big, project than being less than 0.2, can be mass.
Description
Technical field
The present invention relates to a kind of optical system, especially a kind of super large projection scope projection optical system.
Background technology
Recently as the development of shadow casting technique, projector has been widely used in the fields such as household, education, office.
Compared to expensive LCD TV, the projecting apparatus with super large screen effect and close price is more and more popular with consumers.Its
Direction of the middle high definition as the unremitting advance of projector, ultrashort coke are the inexorable trends of projector's future development.Ultrashort coke technology
Using making projector under shorter projection distance, obtain the projection image of same even bigger, can preferably utilize
Under the space environment of compact.Existing market mainstream technology be use reflection type projection, make the projection of projecting apparatus compare 0.4 with
Under, to realize the drop shadow effect of ultrashort coke.
The such disadvantage of ultra short focal projector generally existing currently on the market：1, supported projection image is mostly 80-
120 inches, only for only a few up to 150 inches, projection scope is smaller, can not support projection image more significantly；Although 2, can support
80-150 inches of projection scope, but be only can focusing range, can not actually ensure 80-150 inches of global performance；3, big
Most projecting apparatus use plastic cement aspherical to reduce cost, due to the high temperature exothermic that projector uses for a long time, lead to height
It is warm empty burnt；There is not while solving the projector of class defect also currently on the market.
Invention content
In view of this, the purpose of the present invention is to provide a kind of super large projection scope projection optical system,
The present invention be solve its technical problem and the technical solution adopted is that：
A kind of super large projection scope projection optical system, including dmd chip and speculum, the dmd chip and speculum
Between be provided with opposite the first static lens group of dmd chip, the focal power of the first lens group is negative, the dmd chip and the
The second lens group that can be moved between the first lens group of dmd chip, the light of the second lens group are provided between one lens group
Focal power is that just, being provided between the dmd chip and the second lens group can move between dmd chip and the second lens group
The focal power of the third lens group, the third lens group is negative, and opposite DMD cores are provided between the dmd chip and the third lens group
The focal power of the 4th static lens group of piece, the 4th lens group is just.
Preferably, the focal power of first lens group is -0.01~0.00；The light of second lens group
Focal power is 0.01~0.02；The focal power of the third lens group is -0.02~-0.01；The light of 4th lens group
Focal power is 0.05~0.06.
Preferably, the focal power of second lens group is denoted asThe focal power of the third lens group
It is denoted asWithMathematical relationship be：
Preferably, first lens group include along the first lens set gradually towards the direction of dmd chip,
Second lens and the third lens, the first power of lens are just that the second power of lens is negative, the focal power of the third lens
For just；Second lens group includes that focal power is the 4th positive lens；It is negative that the third lens group, which includes focal power,
The 5th lens；4th lens group include along the 6th lens set gradually towards the direction of dmd chip, the 7th thoroughly
Mirror, diaphragm, the 8th lens, the 9th lens, the tenth lens, the 11st lens, the 12nd lens and the 13rd lens, the 6th lens
Focal power be it is negative, the 7th power of lens be just, the 8th power of lens be it is negative, the 9th power of lens for just,
Tenth power of lens is negative, and the 11st power of lens is that just, the 12nd power of lens is just the 13rd lens
Focal power be just.
Preferably, first lens are plastic cement aspherical lens；Second lens, the third lens,
Four lens, the 5th lens, the 7th lens, the 9th lens, the tenth lens, the 11st lens and the 12nd lens are glass spherical mirror
Piece, the 11st lens and the 12nd lens are bonded by optical glue；6th lens, the 8th lens and the tenth
Three lens are Glass aspheric eyeglass.
Preferably, first lens, the 6th lens, the 8th lens and the 13rd lens are aspherical lens,
First lens, the 6th lens, the 8th lens and the 13rd lens aspherical surface shape meet following equation：
In above-mentioned formula, parameter c is the curvature corresponding to radius, and y is its unit of radial coordinate and length of lens unit phase
Together, k is circular cone whose conic coefficient；When k-factor is less than -1, the face shape curve of lens is hyperbola, when k-factor is equal to -1
When, the face shape curve of lens is parabola；When k-factor is between -1 to 0, the face shape curve of lens is ellipse, works as k-factor
When equal to 0, the face shape curve of lens is circle, and when k-factor is more than 0, the face shape curve of lens is oblateness；a1To a8Respectively
Indicate the coefficient corresponding to each radial coordinate.
Preferably, the dmd chip is placed relative to optical axis bias, the center line of dmd chip and optical axis it is inclined
Separation is from for 5.65mm.
Preferably, the speculum is non-spherical reflector, and focal power is negative.
The beneficial effects of the invention are as follows：
1, than being less than 0.2,0.38-1.5 meters of effective projection distance range supports that 80-300 inches are effectively thrown for present invention projection
Picture is penetrated, has the characteristics that super large projection scope.
2, the present invention makes two linkage groups, i.e. the second lens group focal power by each lens powers of reasonable distribution
With the third lens group focal powerRatio meet following relationship：It is reasonably combined non-simultaneously
The use of spherical surface makes distortion and aberration that can be corrected well；Ensure that optical projection system in different object distances, projects different size
In the case of picture, aberration variation is balanced.Make optical projection system that can effectively support 80-300 inches of projection scope, reaches super large throwing
The effect of range is penetrated, while ensureing high-resolution within the scope of universe, high-definition effect.
3, the present invention is by rationally using plastic cement aspherical, while being used in mixed way glass lens and plastic lens, makes projection
Under high temperature environment, type swell increment aberration with caused by eyeglass face changes system, cancels out each other.While cost is reduced, real
Not empty coke under the condition of high temperature is showed.
Description of the drawings
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is present system optical picture；
Fig. 2 is the optical picture of the second lens group；
Fig. 3 is present system index path；
Fig. 4 is the close-up schematic view of part A in Fig. 3.
Specific implementation mode
The invention will be further described below in conjunction with the accompanying drawings：
Referring to figs. 1 to Fig. 3, the embodiment of the present invention proposes a kind of super large projection scope projection optical system, including DMD
Chip 100 and speculum 300, be provided between the dmd chip 100 and speculum 300 opposite dmd chip 100 it is static the
The focal power of one lens group 210, the first lens group 210 is negative, is provided between the dmd chip 100 and the first lens group 210
The second lens group 220 that can be moved along the center line of dmd chip between 100 first lens group 210 of dmd chip, second
The focal power of lens group 220 is just that being provided between the dmd chip 100 and the second lens group 220 can be in dmd chip 100
And the second the third lens group 230 that is moved along the center line of dmd chip between lens group 220, the light focus of the third lens group 230
Degree is negative, and the 4th static lens group of opposite dmd chip 100 is provided between the dmd chip 100 and the third lens group 230
240, the focal power of the 4th lens group 240 is just.
In the present embodiment, the dmd chip (100) is placed relative to optical axis bias so that the center of dmd chip 100
The deviation distance of line and optical axis is 5.65mm.The focal power of first lens group 210 is -0.01~0.00；Described
The focal power of two lens groups 220 is 0.01~0.02；The focal power of the third lens group 230 is -0.02~-0.01；Institute
The focal power for the 4th lens group 240 stated is 0.05~0.06.Second lens group 220 and the third lens group 230 are linkage groups, institute
The focal power for the second lens group 220 stated is denoted asThe focal power of the third lens group 230 is denoted asPass through
Optical design software optimizes the every design parameter of combination to optical projection system, and each power of lens of reasonable distribution makes two
Linkage groups, the i.e. ratio of the second lens group focal power and the third lens group focal power meet following relationship：Make optical projection system in the characteristic with super large projection scope, can effectively support 80-300 inches
Projection scope, while deflection angle of the light on each lens being made to be reasonably distributed, using less aspherical, have
Under optimal imaging effect, guarantee possesses good craftsmanship, meets the requirement of product mass production.
Referring to Fig.1, first lens group 210 includes saturating along first set gradually towards the direction of dmd chip 100
The focal power of mirror 1, the second lens 2 and the third lens 3, the first lens 1 is just that the focal power of the second lens 2 is negative, the third lens
3 focal power is just；Second lens group 220 includes that focal power is the 4th positive lens 4；The third lens group
230 include focal power be bear the 5th lens 5；4th lens group 240 include along towards the direction of dmd chip 100 according to
The 6th lens 6, the 7th lens 7, diaphragm 14, the 8th lens 8, the 9th lens 9, the tenth lens 10, the 11st lens of secondary setting
11, the 12nd lens 12 and the 13rd lens 13, the focal powers of the 6th lens 6 are negative, and the focal powers of the 7th lens 7 is just the
The focal power of eight lens 8 is negative, and the focal power of the 9th lens 9 is just that the focal power of the tenth lens 10 is negative, the 11st lens 11
Focal power be that just, the focal powers of the 12nd lens 12 is that just, the focal power of the 13rd lens 13 is just.
In the present embodiment, speculum 300 is the aspherical plastic lens of crescent, and focal power is negative, is realizing light
When wide-angle deflection, distortion and the astigmatism of high angle scattered light can be corrected simultaneously, make the light organized after entering that there is smaller angle
And residual aberration, meanwhile, aspherical plastic lens are more at low cost than other non-spherical lenses, and such design can significantly decrease
The cost of system.First lens 1 are plastic cement aspherical lens；Second lens 2, the third lens 3, the 4th lens
4, the 5th lens 5, the 7th lens 7, the 9th lens 9, the tenth lens 10, the 11st lens 11 and the 12nd lens 12 are glass marble
Face eyeglass, the 11st lens 11 and the 12nd lens 12 are bonded by optical glue；6th lens the 6, the 8th
Lens 8 and the 13rd lens 13 are Glass aspheric eyeglass.
By the 11st lens 11 be designed as glass aspheric lenses, can to the aberrations such as spherical aberration, the coma of high light line into
Row correction, coordinates the use of the first lens 1, to realize imaging effect under large aperture and more excellent.11st lens 11 it is curved
Qu Fangxiang deviates from chip, with the first lens 1 on the contrary, ensureing, because projector uses for a long time, camera lens internal temperature to be caused to increase
In the case of, the first lens 1 plastic cement aspheric superficial expansivity P1, eyeglass temperature T1, the 11st lens glass aspheric surface expansion system
Number P11, eyeglass temperature T11 meet the relational expression of P1*T1+P11*T11 ≈ 0.Pass through the aspherical knot with Glass aspheric of plastic cement
It closes and uses, solve the empty burnt phenomenon of system, it is ensured that under the condition of high temperature, optical system not defocus.
Referring to Fig.1, first lens 1, the 6th lens 6, the 8th lens 8 and the 13rd lens 13 are aspherical mirror
Piece, first lens 1, the 6th lens 6, the 8th lens 8 and the 13rd lens 13 aspherical surface shape meet with lower section
Journey：
In above-mentioned formula, parameter c is the curvature corresponding to radius, and y is its unit of radial coordinate and length of lens unit phase
Together, k is circular cone whose conic coefficient；When k-factor is less than -1, the face shape curve of lens is hyperbola, when k-factor is equal to -1
When, the face shape curve of lens is parabola；When k-factor is between -1 to 0, the face shape curve of lens is ellipse, works as k-factor
When equal to 0, the face shape curve of lens is circle, and when k-factor is more than 0, the face shape curve of lens is oblateness；a1To a8Respectively
Indicate the coefficient corresponding to each radial coordinate.
Following embodiment is：Using distance 0.3m~1.5m, ratio 0.2 is projected, can support 80 inches~300 English of projection image
The actual design parameter of very little projection lens：
The asphericity coefficient in each aspherical face：
300 first face S1 coefficients of speculum are：
K=-768
a1=0
a2=0.00011485935
a3=-5.3053334e-007
a4=2.126744e-009
a5=-5.4787393e-012
a6=8.0470803e-015
a7=-4.9662071e-018
a8=0；
First lens, 1 first face S2 coefficients are：
K=22.275
a1=0
a2=0.00014239041
a3=-4.6197932e-007
a4=5.2022001e-010
a5=1.2998783e-011
a6=-7.5810064e-014
a7=1.4883303e-016
a8=0；
First lens, 1 second face S3 coefficients are：
K=-565.9319
a1=0
a2=-4.6842153e-006
a3=1.3583932e-008
a4=2.96366079486753e-012
a5=2.35668648024052e-015
a6=-1.7709563837241e-019
a7=-6.05918030192083e-022
a8=0；
6th lens, 6 first face S12 coefficients are：
K=-0.4040741
a1=0
a2=4.90490480030574e-007
a3=-2.05760498407608e-010
a4=2.99679825125034e-014
a5=5.55711304020551e-018
a6=-2.86845642405709e-021
a7=2.91053534222281e-025
a8=0；
6th lens, 6 second face S13 coefficients are：
K=90.3686
a1=0
a2=3.37355419190151e-008
a3=-1.68426620586378e-010
a4=-1.77578855135222e-011
a5=1.31858269908392e-013
a6=1.61679421023673e-016
a7=-3.13849187032395e-018
a8=0；
8th lens, 8 first face S17 coefficients are：
K=-1.3840751
a1=0
a2=-2.79361010729748e-008
a3=-6.6497057344366e-010
a4=-2.54430577284334e-013
a5=-1.84664483140541e-015
a6=6.46082131490784e-017
a7=-1.54392143969012e-019
a8=0；
8th lens, 8 second face S18 coefficients are：
K=-25.2567
a1=0
a2=4.90490480030574e-007
a3=-3.94843412007971e-010
a4=3.02112629843759e-013
a5=1.40840432176276e-015
a6=6.90569325719901e-019
a7=-6.52550386131808e-021
a8=0；
13rd lens, 13 first face S26 coefficients are：
K=-12.457
a1=0
a2=4.904900574e-007
a3=-2.05760908e-010
a4=2.99679824e-014
a5=-7.4255518e-16
a6=1.3859057e-18
a7=1.8118184e-23
a8=0；
13rd lens, 13 second face S27 coefficients are：
K=-1.4040741
a1=0
a2=-5.2362612e-06
a3=-2.057608e-010
a4=2.9244063e-09
a5=5.5046807e-16
a6=5.5046807e-16
a7=4.8296771e-18
a8=0.
Claims (8)
1. a kind of super large projection scope projection optical system, it is characterised in that it includes dmd chip (100) and speculum (300),
Static the first lens group (210) of opposite dmd chip (100) is provided between the dmd chip (100) and speculum (300),
The focal power of first lens group (210) is negative, and being provided between the dmd chip (100) and the first lens group (210) can be
The second lens group (220) moved between (100) first lens group (210) of dmd chip, the focal power of the second lens group (220)
It can be in dmd chip (100) and the second lens just, to be provided between the dmd chip (100) and the second lens group (220)
The focal power of the third lens group (230) moved between group (220), the third lens group (230) is negative, the dmd chip (100)
The 4th static lens group (240) of opposite dmd chip (100), the 4th lens group are provided between the third lens group (230)
(240) focal power is just.
2. a kind of super large projection scope projection optical system according to claim 1, which is characterized in that described first is thoroughly
The focal power of microscope group (210) is -0.01~0.00；The focal power of second lens group (220) is 0.01~0.02；It is described
The third lens group (230) focal power be -0.02~-0.01；The focal power of 4th lens group (240) be 0.05~
0.06。
3. a kind of super large projection scope projection optical system according to claim 1, which is characterized in that described second is thoroughly
The focal power of microscope group (220) is denoted asThe focal power of the third lens group (230) is denoted asWithMathematical relationship be：
4. a kind of super large projection scope projection optical system according to claim 1, which is characterized in that described first is thoroughly
Microscope group (210) includes along the first lens (1), the second lens (2) and the third set gradually towards the direction of dmd chip (100)
The focal power of lens (3), the first lens (1) is just that the focal power of the second lens (2) is negative, and the focal power of the third lens (3) is
Just；Second lens group (220) includes that focal power is the 4th positive lens (4)；The third lens group (230) includes
Focal power is the 5th lens (5) born；4th lens group (240) include along towards the direction of dmd chip (100) successively
The 6th lens (6) that are arranged, the 7th lens (7), diaphragm (14), the 8th lens (8), the 9th lens (9), the tenth lens (10),
The focal power of 11st lens (11), the 12nd lens (12) and the 13rd lens (13), the 6th lens (6) is negative, and the 7th thoroughly
The focal power of mirror (7) is that just, the focal power of the 8th lens (8) is negative, and the focal power of the 9th lens (9) is just the tenth lens
(10) focal power is negative, and the focal power of the 11st lens (11) is that just, the focal power of the 12nd lens (12) is the just the 13rd
The focal power of lens (13) is just.
5. a kind of super large projection scope projection optical system according to claim 4, which is characterized in that described first is thoroughly
Mirror (1) is plastic cement aspherical lens；Second lens (2), the third lens (3), the 4th lens (4), the 5th lens (5),
7th lens (7), the 9th lens (9), the tenth lens (10), the 11st lens (11) and the 12nd lens (12) are glass spherical surface
Eyeglass, the 11st lens (11) and the 12nd lens (12) are bonded by optical glue；6th lens (6),
8th lens (8) and the 13rd lens (13) are Glass aspheric eyeglass.
6. a kind of super large projection scope projection optical system according to claim 4, which is characterized in that first lens
(1), the 6th lens (6), the 8th lens (8) and the 13rd lens (13) are aspherical lens, first lens (1),
The aspherical surface shape of six lens (6), the 8th lens (8) and the 13rd lens (13) meets following equation：
In above-mentioned formula, parameter c is the curvature corresponding to radius, its unit is identical with length of lens unit for radial coordinate by y, k
For circular cone whose conic coefficient；When k-factor is less than -1, the face shape curve of lens is hyperbola, when k-factor is equal to -1, thoroughly
The face shape curve of mirror is parabola；When k-factor is between -1 to 0, the face shape curve of lens is ellipse, when k-factor is equal to 0
When, the face shape curve of lens is circle, and when k-factor is more than 0, the face shape curve of lens is oblateness；a1To a8It indicates respectively each
Coefficient corresponding to radial coordinate.
7. a kind of super large projection scope projection optical system according to claim 1, which is characterized in that the DMD cores
Piece (100) is placed relative to optical axis bias, and the center line of dmd chip (100) and the deviation distance of optical axis are 5.65mm.
8. a kind of super large projection scope projection optical system according to claim 1, which is characterized in that the speculum
(300) it is non-spherical reflector, focal power is negative.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810467887.3A CN108398846B (en) | 2018-05-16 | 2018-05-16 | Ultra-large projection range projection optical system |
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| CN201810467887.3A CN108398846B (en) | 2018-05-16 | 2018-05-16 | Ultra-large projection range projection optical system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113534418A (en) * | 2021-09-07 | 2021-10-22 | 沂普光电(天津)有限公司 | Ultrashort burnt camera lens subassembly |
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| CN208110242U (en) * | 2018-05-16 | 2018-11-16 | 中山联合光电科技股份有限公司 | A kind of super large projection scope projection optical system |
Cited By (2)
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| CN113534418A (en) * | 2021-09-07 | 2021-10-22 | 沂普光电(天津)有限公司 | Ultrashort burnt camera lens subassembly |
| CN113534418B (en) * | 2021-09-07 | 2021-12-07 | 沂普光电(天津)有限公司 | Ultrashort burnt camera lens subassembly |
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