CN106019538B - It is a kind of number two-shipper to projection hemisphere curtain projection lens structure - Google Patents
It is a kind of number two-shipper to projection hemisphere curtain projection lens structure Download PDFInfo
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- CN106019538B CN106019538B CN201610623955.1A CN201610623955A CN106019538B CN 106019538 B CN106019538 B CN 106019538B CN 201610623955 A CN201610623955 A CN 201610623955A CN 106019538 B CN106019538 B CN 106019538B
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Abstract
The invention discloses a kind of digital two-shippers to projection hemisphere curtain projection lens structure, including projection lens ontology, projection lens ontology is disposed with the first lens group, the second lens group, diaphragm and the third lens group from ball curtain side, and the first lens group includes the first lens set gradually from ball curtain side, the second lens, the third lens；Second lens group includes the 4th lens；The third lens group includes the 5th lens, the 6th lens and the 7th lens set gradually from ball curtain side.The present invention can improve the deficiencies in the prior art, have high transmittance, fine definition, high contrast, the optical characteristics of low astigmatism, small color difference.
Description
Technical field
The present invention relates to a kind of reflective hemisphere curtain projection lens structure, especially a kind of digital two-shipper is to projection half
Ball-screen projection lens construction.
Background technique
Ball-screen projection is a kind of emerging display technique, and it can only be plane regular figure that it, which has broken previous projected image,
Limitation.Ball-screen projection is divided into two kinds according to the difference of digital projector present position: one is outer pitching, the number used is thrown
Shadow machine is located at outside sphere, projects image onto outer surface of spheroid, due at least needing 4 digital projectors, and site requirements
Greatly and the factors such as viewing is ineffective, it is seldom used；Another kind is interior pitching, and the digital projector used is located at ball
Internal portion, projects image onto ball interior, currently, this interior delivery system is broadly divided into two classes: one kind is transmission-type, ball curtain
Form is mostly hemispherical, and ball curtain diameter range is about 0.5 meter -1.8 meters, and spectators watch projected picture outside sphere；It is another kind of
Be it is reflective, for ball curtain form based on hemisphere, the direct range of ball curtain is about 2 meters -12 meters, spectators ball interior watch project
Picture.Reflective half ball curtain projection system is widely used observatory, earthquake because it has the image effect more shaken
Office, the places such as Space Agency, school, museum, exhibition center, science and technology center, space theatre.Reflective half ball curtain projection system mainly has two
Kind implementation: one is digital projector is placed in hemisphere curtain center, the fish eye lens of 180 ° of field angle of arranging in pairs or groups will be believed
Number project spherical screen imaging, the advantages of this mode be it is at low cost, picture uniformity is preferable, easily realizes, later maintenance is few,
The disadvantage is that picture brightness and resolution ratio are relatively low, the utilization rate of chip is too low, and energy loss is big, and digital projector occupies viewing
The optimum position of ball curtain picture；Another kind is by more digital projectors (not less than four) as hemisphere curtain edge, collocation
Standard lens shows sherical seamless picture true to nature by edge fusion technology, and advantage is that picture brightness and clarity are high, is possessed
More viewing spaces, the disadvantage is that cost is excessively high, integration technology requires height, and later maintenance complexity is cumbersome.
For large-scale ball screen cinema projection system, similar technical problem is equally existed, in order to change this technology
Status gives a kind of Two bors d's oeuveres in patent of invention CN104020547A to throwing digital ball-screen cinema camera lens, but this camera lens knot
Structure contents just to the use of the d-cinema projectors for the three target surface DLP that chip size is 0.95 inch~1.38 inches, should
Lens construction in patent of invention is cooperating chip size to be 0.55 inch~1.2 inches of single target surface DLP's or three target surface LCD
When digital projector is used for two-shipper to half ball-screen projection of projection, projected picture effect is poor, such as poor definition, astigmatism
Greatly, color difference is serious, poor contrast, and brightness is low etc., has seriously affected viewing effect, in addition, the lens construction is complex, manufacture
It is at high cost, and whole transmitance is low.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of digital two-shippers to projection hemisphere curtain projection lens structure,
The deficiencies in the prior art are able to solve, the optics with high transmittance, fine definition, high contrast, low astigmatism, small color difference is special
Property.
In order to solve the above technical problems, the technical solution used in the present invention is as follows.
It is a kind of number two-shipper to projection hemisphere curtain projection lens structure, including projection lens ontology, projection lens sheet
Body is disposed with the first lens group, the second lens group, diaphragm and the third lens group from ball curtain side, the first lens group include from
Act the first lens, the second lens, the third lens set gradually in ball curtain side；Second lens group includes the 4th lens；The third lens
Group includes the 5th lens, the 6th lens and the 7th lens set gradually from ball curtain side.
The curved month type preferably, first lens, the second lens, the third lens are negative, and the equal court in convex surface of camera lens
To ball curtain side.
Preferably, the 4th lens are biconvex, the biggish side of curvature absolute value is towards ball curtain side.
Preferably, the 5th lens and the 6th lens are double glued microscope groups, the 5th lens are negative curved month type, mirror
Towards ball curtain side, the 6th lens are biconvex on the convex surface of head, and the biggish side of curvature absolute value is towards ball curtain side, the 7th
Lens are biconvex, and the biggish side of curvature absolute value is towards ball curtain side.
Preferably, the distance of the diaphragm and the second lens group is greater than the distance of diaphragm and the third lens group.
Preferably, first lens group, the second lens group and the focal power of the third lens group absolute value ratio by it is preceding extremely
After be followed successively by 1: 0.193: 0.493, wherein the focal power of the first lens group is negative value, the focal power of the second lens group is positive value,
The focal power of the third lens group is positive value, and the sum of focal power of the first lens group and the second lens group is negative value, and the first lens
The ratio between absolute value and the absolute value of focal power of the third lens group of the sum of the focal power of group and the second lens group are 1:0.61.
Preferably, the optical performance parameter range of the camera lens is: focal length f '=5.94mm~15.75mm；Relative aperture
'=1/1.8~1/2.0 D/f；2 ω=90 °~110 ° of field angle；Instead more than being 3.5~6.1；Wherein D is Entry pupil diameters.
Preferably, the coloured light wave-length coverage that the camera lens is applicable in is 430nm~660nm.
Preferably, first lens, the second lens, the third lens are all made of weight crown system colouless optical glass material；
4th lens use dense flint system colouless optical glass material；5th lens, the 6th lens, the 7th lens successively use dense flint
System, weight crown system, weight crown system colouless optical glass material.
Brought beneficial effect is by adopting the above technical scheme: the present invention utilizes " non-according to reversibility of optical path principle
It is similar " image-forming principle and Modern Geometry optical aberration theoretical basis, suitable initial optical structure is established, in initial optical structure
Certain thickness equivalent parallel plate optical glass is added later, is used for simulation numeral projector inner part color-combination prism, participates in
The aberration of optical texture matches and balance, then it is reasonable calculate projection distortion numerical value, by the Computer Aided Design of optical design software,
And artificial mathematical interpolation analysis method is combined, reasonable distribution system focal power is used for by constructing preceding group of negative power
Increase field angle and produce reasonable distortion curve, middle group of positive light coke, for reduce the coma of preceding group of generation, spherical aberration,
Astigmatism and reduction senior aberration amount, rear group of positive light coke, for compensating the residual aberration of preceding group and middle group, finally, by not
Disconnected modification parameter objectives value and various aberration target control values, then transformation constantly is modified to structure each group, then pass through
It crosses and optimizes re-optimization repeatedly, solve existing Two bors d's oeuveres camera lens projected picture poor definition, astigmatism is big, and color difference is serious, poor contrast,
The problems such as brightness is low, and structure is complicated, and manufacturing cost is high, and transmitance is low.The lens construction is made of 6 groups of 7 optical glass lens,
Possess maximum 110 ° of field angle, relative aperture is up to 1/1.8, it is biggish instead more than, it is 6.1 times maximum, core can be satisfied with
The use of the various digital projectors of single target surface DLP or three target surface LCD that chip size is 0.55 inch~1.2 inches.With height
The optical properties advantages such as brightness, fine definition, high contrast, low astigmatism, small color difference, the ball curtain projection system of composition is at low cost,
Later maintenance is simple, and possesses more viewing spaces.
Detailed description of the invention
Fig. 1 is the structure chart of a specific embodiment of the invention.
Fig. 2 is ray tracing schematic diagram of the invention.
Fig. 3 is number two-shipper applied by the present invention to half ball curtain projection system structural schematic diagram of projection.
Fig. 4 is the transfer curve figure of optical texture of the present invention.
Fig. 5 is the spherical aberration curve graph of optical texture of the present invention.
Fig. 6 is the chromatic longitudiinal aberration curve graph of optical texture of the present invention.
In figure: 11, the first lens group；12, the second lens group；13, diaphragm；14, the third lens group；1101, the first lens；
1102, the second lens；1103, the third lens；1201, the 4th lens；1401-1, the 5th lens；1401-2, the 6th lens；
1402, the 7th lens；M, ball curtain；A, feature light.
Specific embodiment
The standardized element used in the present invention can commercially, and shaped piece is according to specification and attached drawing
Record can carry out customized, and the specific connection type of each part is all made of in the prior art mature bolt, rivet, weldering
The conventional means such as connect, paste, this will not be detailed here.
Referring to Fig.1, a specific embodiment of the invention includes projection lens ontology, and projection lens ontology is from ball curtain side
It is disposed with the first lens group 11, the second lens group 12, diaphragm 13 and the third lens group 14, the first lens group 11 includes from ball
Act the first lens 1101, the second lens 1102, the third lens 1103 set gradually in curtain side；Second lens group 12 includes the 4th saturating
Mirror 1201；The third lens group 14 includes the 5th lens 1401-1 set gradually from ball curtain side, the 6th lens 1401-2 and
Seven lens 1402.First lens 1101, the second lens 1102, the third lens 1103 are negative curved month type, and the convex surface of camera lens is equal
Towards ball curtain side.4th lens 1201 are biconvex, and the biggish side of curvature absolute value is towards ball curtain side.5th lens
1401-1 and the 6th lens 1401-2 is double glued microscope groups, and the 5th lens 1401-1 is negative curved month type, the convex surface court of camera lens
To ball curtain side, the 6th lens 1401-2 is biconvex, and the biggish side of curvature absolute value is towards ball curtain side, the 7th lens
1402 be biconvex, and the biggish side of curvature absolute value is towards ball curtain side.The distance of diaphragm 13 and the second lens group 12 is greater than
The distance of diaphragm 13 and the third lens group 14.The focal power of first lens group 11, the second lens group 12 and the third lens group 14 is exhausted
Than is from front to back followed successively by 1: 0.193: 0.493 to value, wherein the focal power of the first lens group 11 is negative value, the second lens group 12
Focal power be positive value, the focal power of the third lens group 14 is positive value, the focal power of the first lens group 11 and the second lens group 12
The sum of be negative value, and the light of the absolute value of the sum of focal power of the first lens group 11 and the second lens group 12 and the third lens group 14
The ratio between absolute value of focal power is 1:0.61.The optical performance parameter range of camera lens is: focal length f '=5.94mm~15.75mm；Relatively
Aperture '=1/1.8~1/2.0 D/f；2 ω=90 °~110 ° of field angle；Instead more than being 3.5~6.1；Wherein D is Entry pupil diameters.Mirror
The applicable coloured light wave-length coverage of head is 430nm~660nm.First lens 1101, the second lens 1102, the third lens 1103 are adopted
With weight crown system colouless optical glass material；4th lens 1201 use dense flint system colouless optical glass material；5th lens
1401-1, the 6th lens 1401-2, the 7th lens 1402 are successively using dense flint system, weight crown system, weight crown system colouless optical glass
Material.
As shown in Fig. 2, giving digital two-shipper to the feature of each specific visual field of projection hemisphere curtain projection lens structure
Light a trend and feature light a each lens surface incoming position.
As shown in figure 3, when carrying out digital two-shipper to half ball-screen projection of projection using camera lens of the present invention, equipped with the present invention
The Liang Tai digital engineering projector of camera lens is separately mounted to the left and right symmetrical two sides of reflective hemisphere curtain M lower edge.First number
With certain elevation angle, projected picture is projected the most portions in the right side of reflective hemisphere curtain M by camera lens through the invention for engineering projector,
With certain elevation angle, projected picture is projected reflective hemisphere curtain M's by camera lens through the invention for another digital engineering projector
Left most portions, two projected pictures being projected out have certain overlapping region in the Chi Daochu of reflective hemisphere curtain M, are used for picture
Face fusion.When Liang Tai digital engineering projector's synchronized projection, spectators can enjoy high brightness, high-resolution in the ball curtain Room
The projected picture of degree, high contrast.
In order to illustrate the embodiment of the present invention, when camera lens equivalent focal length is 1, Optic structure parameter is as follows:
Fig. 4 is the transfer curve figure of lens optical structure of the present invention, and abscissa is the spatial frequency of image planes, ordinate
For the optical transfer function value of system.
Fig. 5 is the spherical aberration curve graph of lens optical structure of the present invention, and abscissa is the numerical value of spherical aberration, and ordinate is normalization
Aperture.
Fig. 6 is the chromatic longitudiinal aberration curve graph of lens optical structure of the present invention, and abscissa is the numerical value of chromatic longitudiinal aberration, ordinate
To normalize visual field.
In the description of the present invention, it is to be understood that, term " longitudinal direction ", " transverse direction ", "upper", "lower", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown is merely for convenience of the description present invention, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (7)
1. a kind of number two-shipper is to projection hemisphere curtain projection lens structure, including projection lens ontology, projection lens ontology
The first lens group (11), the second lens group (12), diaphragm (13) and the third lens group (14) are disposed with from ball curtain side,
Be characterized in that: the projection lens is set as two, is separately positioned on hemisphere curtain two sides, and two projection lens are in one
Clamp angle is projected to hemisphere curtain, and the first lens group (11) includes the first lens (1101) set gradually from ball curtain side, second
Lens (1102), the third lens (1103)；Second lens group (12) includes the 4th lens (1201)；The third lens group (14) includes
The 5th lens (1401-1), the 6th lens (1401-2) and the 7th lens (1402) set gradually from ball curtain side；
First lens (1101), the second lens (1102), the third lens (1103) are negative curved month type, and the convex surface of camera lens
Towards ball curtain side；
The focal power absolute value ratio of first lens group (11), the second lens group (12) and the third lens group (14) is from front to back
It is followed successively by 1: 0.193: 0.493, wherein the focal power of the first lens group (11) is negative value, the focal power of the second lens group (12) is
Positive value, the focal power of the third lens group (14) are positive value, the sum of the focal power of the first lens group (11) and the second lens group (12)
For negative value, and the absolute value of the sum of focal power of the first lens group (11) and the second lens group (12) and the third lens group (14)
The ratio between absolute value of focal power is 1:0.61.
2. number two-shipper according to claim 1 is to projection hemisphere curtain projection lens structure, it is characterised in that: described
4th lens (1201) are biconvex, and the biggish side of curvature absolute value is towards ball curtain side.
3. number two-shipper according to claim 1 is to projection hemisphere curtain projection lens structure, it is characterised in that: described
5th lens (1401-1) and the 6th lens (1401-2) are double glued microscope groups, and the 5th lens (1401-1) are negative bent moon
Type, towards ball curtain side, the 6th lens (1401-2) are biconvex, the biggish side court of curvature absolute value on the convex surface of camera lens
To ball curtain side, the 7th lens (1402) are biconvex, and the biggish side of curvature absolute value is towards ball curtain side.
4. number two-shipper according to claim 1 is to projection hemisphere curtain projection lens structure, it is characterised in that: described
The distance of diaphragm (13) and the second lens group (12) is greater than the distance of diaphragm (13) and the third lens group (14).
5. number two-shipper according to claim 1 is to projection hemisphere curtain projection lens structure, it is characterised in that: described
The optical performance parameter range of camera lens is: focal length f '=5.94mm~15.75mm；'=1/1.8~1/2.0 relative aperture D/f；
2 ω=90 °~110 ° of field angle；Instead more than being 3.5~6.1；Wherein D is Entry pupil diameters.
6. number two-shipper according to claim 1 is to projection hemisphere curtain projection lens structure, it is characterised in that: described
The applicable coloured light wave-length coverage of camera lens is 430nm~660nm.
7. number two-shipper according to claim 1 is to projection hemisphere curtain projection lens structure, it is characterised in that: described
First lens (1101), the second lens (1102), the third lens (1103) are all made of weight crown system colouless optical glass material；4th
Lens (1201) use dense flint system colouless optical glass material；5th lens (1401-1), the 6th lens (1401-2), the 7th
Lens (1402) are successively using dense flint system, weight crown system, weight crown system colouless optical glass material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610623955.1A CN106019538B (en) | 2016-08-03 | 2016-08-03 | It is a kind of number two-shipper to projection hemisphere curtain projection lens structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610623955.1A CN106019538B (en) | 2016-08-03 | 2016-08-03 | It is a kind of number two-shipper to projection hemisphere curtain projection lens structure |
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| CN106019538A CN106019538A (en) | 2016-10-12 |
| CN106019538B true CN106019538B (en) | 2019-02-15 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1161461A (en) * | 1995-06-02 | 1997-10-08 | 德克萨斯仪器股份有限公司 | Offset zoom lens for reflective light modulators |
| CN103676118A (en) * | 2012-09-03 | 2014-03-26 | 株式会社理光 | Projector zoom lens and projector |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6545819B1 (en) * | 1999-08-31 | 2003-04-08 | Canon Kabushiki Kaisha | Zoom lens and optical apparatus having the same |
| US7009765B2 (en) * | 2002-08-16 | 2006-03-07 | Infocus Corporation | Wide angle lens system having a distorted intermediate image |
| JP5369867B2 (en) * | 2009-04-24 | 2013-12-18 | 株式会社リコー | Wide angle lens and imaging device |
| JP2013160984A (en) * | 2012-02-07 | 2013-08-19 | Ricoh Co Ltd | Imaging optical system and imaging apparatus |
| JP2016126254A (en) * | 2015-01-07 | 2016-07-11 | コニカミノルタ株式会社 | Imaging lens, imaging apparatus, and projection device |
-
2016
- 2016-08-03 CN CN201610623955.1A patent/CN106019538B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1161461A (en) * | 1995-06-02 | 1997-10-08 | 德克萨斯仪器股份有限公司 | Offset zoom lens for reflective light modulators |
| CN103676118A (en) * | 2012-09-03 | 2014-03-26 | 株式会社理光 | Projector zoom lens and projector |
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| CN106019538A (en) | 2016-10-12 |
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