CN206638898U - A kind of ultrashort out-of-focus projection's Optical devices - Google Patents
A kind of ultrashort out-of-focus projection's Optical devices Download PDFInfo
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- CN206638898U CN206638898U CN201720319814.0U CN201720319814U CN206638898U CN 206638898 U CN206638898 U CN 206638898U CN 201720319814 U CN201720319814 U CN 201720319814U CN 206638898 U CN206638898 U CN 206638898U
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Abstract
The utility model discloses a kind of ultrashort out-of-focus projection's Optical devices, it is disposed with projecting direction：Illuminator, refractor component, non-spherical reflector；The illuminator includes dmd chip, equivalent prism；The refractor component includes：The first lens group that the relative dmd chip of energy moves forward and backward, the focal power of first lens group is just；The second lens group that the relative dmd chip of energy moves forward and backward, the focal power of second lens group is just；The 3rd lens group that the relative dmd chip of energy moves forward and backward, the focal power of the 3rd lens group is negative；Fourth lens group static with respect to dmd chip, the focal power of the 4th lens group is just.The utility model high resolution, realize less than 0.18 and project ratio, and not empty Jiao at high operating temperatures；Realize the resolution ratio under different projection distances do not reduce it is big with distortion invariation.
Description
【Technical field】
The shadow casting technique of photoelectric display industry is the utility model is related to, especially a kind of ultrashort out-of-focus projection's Optical devices.
【Background technology】
Recently as the development of shadow casting technique, projecting apparatus has been widely used for the fields such as family expenses, education, office, its
In, ultrashort out-of-focus projection can project large-sized picture in the case where short distance projects, and enjoy liking for users.
Ultrashort out-of-focus projection's camera lens in the market has two kinds of design methods：1st, using the reversed telephoto lens knot of refraction type
Structure, camera lens volume is big, more using number of lenses, for the correcting distorted and curvature of field, it has to sacrifices resolution ratio, causes resolution ratio
Relatively low, manufacturing tolerance is sensitive, can not produce in batches；2nd, hybrid-type structure is that refractor component adds mirror lens group, at present
Using the universal resolution ratio of ultrashort zoom lens of this structure is relatively low, projection than small, brightness is low, projection distance change when the curvature of field and abnormal
Become apparent big, cause resolving power to be deteriorated, and the scope of projection distance is smaller, although the resolution ratio of a small number of camera lenses reaches
1080P, but in order to improve resolution ratio, but sacrifice projection ratio, and increase more aspherical, cause fine ratio of product low, can not
Batch production；Also there is small part camera lens to reduce cost, it is aspherical using plastic cement, cause camera lens to be used for a long time in projector
When empty burnt phenomenon is produced because of high temperature exothermic, can also overcome disadvantages mentioned above simultaneously without ultrashort zoom lens in the market.
Therefore, the utility model is based on the insufficient and caused of the above.
【Utility model content】
The technical problems to be solved in the utility model is to provide a kind of ultrashort out-of-focus projection's Optical devices, the device resolution ratio
Height, brightness are high, not empty Jiao of high temperature, and projection distance scope is big, resolving power does not reduce, distortion invariation is big, can under different projection distances
Batch production.
In order to solve the above technical problems, the utility model employs following technical proposals：A kind of ultrashort out-of-focus projection's optics dress
Put, it is characterised in that be disposed with projecting direction：Illuminator, refractor component, non-spherical reflector；It is described
Illuminator includes dmd chip, equivalent prism；
The refractor component includes：
The first lens group that the relative dmd chip of energy moves forward and backward, the focal power of first lens group is just；
The second lens group that the relative dmd chip of energy moves forward and backward, the focal power of second lens group is just；
The 3rd lens group that the relative dmd chip of energy moves forward and backward, the focal power of the 3rd lens group is negative；
Fourth lens group static with respect to dmd chip, the focal power of the 4th lens group is just.
A kind of ultrashort out-of-focus projection's Optical devices as described above, it is characterised in that：The first described lens group is included along throwing
Penetrate the first lens, the second lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens, diaphragm that direction sets gradually and
7th lens；Second lens group includes the 8th lens；3rd lens group includes the 9th lens；4th lens group
Including the tenth lens, the 11st lens, the 12nd lens and the 13rd lens set gradually along projecting direction.
A kind of ultrashort out-of-focus projection's Optical devices as described above, it is characterised in that：Described dmd chip is inclined relative to optical axis
From placement so that the center of dmd chip is 0.8mm-1mm with optical axis deviation distance.
A kind of ultrashort out-of-focus projection's Optical devices as described above, it is characterised in that：The focal power of first lens group expires
Foot 0.03≤| φ210|≤0.04；The focal power satisfaction 0.004 of second lens group≤| φ220|≤0.005；Described 3rd
The focal power satisfaction 0.03 of lens group≤| φ230|≤0.035；The focal power satisfaction 0.007 of 4th lens group≤| φ240|
≤ 0.008, the focal power of the non-spherical reflector meets 0.03≤| φ300|≤0.033。
A kind of ultrashort out-of-focus projection's Optical devices as described above, it is characterised in that：The 11st power of lens φ11
It is negative, the tenth power of lens φ10For just, focal power meets 0.8≤| φ11/φ10|≤0.9；Described 13rd is saturating
The focal power φ of mirror13It is negative, the 12nd power of lens φ12For just, focal power meets 0.2≤| φ13/φ12|≤
0.3。
A kind of ultrashort out-of-focus projection's Optical devices as described above, it is characterised in that：6th power of lens be it is negative,
Focal power φ6Meet：0.008≤|φ6|≤0.009；The two sides of 6th lens bends towards dmd chip；5th lens
Focal power for just, the 4th power of lens be negative, and the 4th lens two sides bends towards non-spherical reflector, focal power satisfaction
0.04≤|φ4/φ5|≤0.041, refractive index meets 0.3≤(ND4-ND5)≤0.4；3rd power of lens for just,
Second power of lens is negative, and the two sides of the second lens bends towards non-spherical reflector, focal power meets 0.014≤|
φ2/φ3|≤0.016, refractive index meets 0.4≤(ND2-ND3)≤0.43。
A kind of ultrashort out-of-focus projection's Optical devices as described above, it is characterised in that：Second lens and the described 3rd saturating
Mirror is bonded by optical glue, and the 4th lens are bonded with the 5th lens by optical glue.
A kind of ultrashort out-of-focus projection's Optical devices as described above, it is characterised in that：First lens, the 6th lens,
Eight lens, the 9th lens and non-spherical reflector are Glass aspheric eyeglass.
A kind of ultrashort out-of-focus projection's Optical devices as described above, it is characterised in that：First lens, the 6th lens,
The aspherical surface shape of eight lens, the 9th lens and non-spherical reflector meets equation：
Parameter c is the curvature corresponding to radius in aforesaid equation, 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
During 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；α1To α8Respectively
Represent the coefficient corresponding to each radial coordinate.
Compared with prior art, a kind of ultrashort out-of-focus projection's Optical devices of the present utility model, have reached following effect：
1st, the utility model high resolution, realize less than 0.18 and project ratio, and not empty Jiao at high operating temperatures.
2nd, the resolution ratio that the utility model is realized under different projection distances does not reduce and distortion invariation is big.
3rd, the utility model is greatly lowered assembling susceptibility, can carried out by the reasonable distribution to device focal power
Mass production.
【Brief description of the drawings】
Specific embodiment of the present utility model is described in further detail below in conjunction with the accompanying drawings, wherein：
Fig. 1 is the utility model schematic diagram；
Fig. 2 is the utility model light path schematic diagram；
Brief description of the drawings：100th, illuminator；110th, dmd chip；120th, equivalent prism；200th, refractor component；210、
First lens group；220th, the second lens group；230th, the 3rd lens group；240th, the 4th lens group；300th, non-spherical reflector；1st,
One lens；2nd, the second lens；3rd, the 3rd lens；4th, the 4th lens；5th, the 5th lens；6th, the 6th lens；7th, the 7th lens；8th,
Eight lens；9th, the 9th lens；10th, the tenth lens；11st, 11 lens；12nd, the 12nd lens；13rd, the 13rd lens；14th, light
Door screen.
【Embodiment】
Embodiment of the present utility model is elaborated below in conjunction with the accompanying drawings.
As depicted in figs. 1 and 2, a kind of ultrashort out-of-focus projection's Optical devices, are disposed with projecting direction：Illuminator
100th, refractor component 200, non-spherical reflector 300；The illuminator 100 includes dmd chip 110, equivalent prism
120；
The refractor component 200 includes：
The first lens group 210 moved forward and backward with respect to dmd chip 110, the focal power of first lens group 210 is just；
First lens group can move forward and backward with respect to dmd chip, burnt variable quantity after compensating when camera lens assembles.
Can the second movable lens group 220 of dmd chip 110, the focal power of second lens group 220 be relatively
Just.
Can the 3rd movable lens group 230 of dmd chip 110, the focal power of the 3rd lens group 230 be relatively
It is negative.3rd lens group and the second lens group are linkage groups, are moved together relative to dmd chip 110.
Fourth lens group 240 static with respect to dmd chip 110, the focal power of the 4th lens group 240 is just.
As depicted in figs. 1 and 2, in the present embodiment, the first described lens group 210 includes setting gradually along projecting direction
The first lens 1, the second lens 2, the 3rd lens 3, the 4th lens 4, the 5th lens 5, the 6th lens 6, diaphragm 14 and the 7th it is saturating
Mirror 7；Second lens group 220 includes the 8th lens 8；The two sides of 8th lens 8 bends towards non-spherical reflector 300；It is described
3rd lens group 230 includes the 9th lens 9；4th lens group 240 includes the tenth lens set gradually along projecting direction
10th, the 11st lens 11, the 12nd lens 12 and the 13rd lens 13.
As shown in figure 1, in the present embodiment, described dmd chip 110 is placed relative to optical axis deviation so that dmd chip
110 center is 0.8mm-1mm with optical axis deviation distance.For meeting that the emergent ray of refractor component 200 passes through aspheric
Light after face speculum 300 is not interfered with refractor component；Dmd chip is 0.65 inch, and its resolution ratio is 1920*
1080。
As depicted in figs. 1 and 2, in the present embodiment, first lens group 210 focal power meet 0.03≤| φ210|
≤0.04；The focal power satisfaction 0.004 of second lens group 220≤| φ220|≤0.005；3rd lens group 230
Focal power satisfaction 0.03≤| φ230|≤0.035；The focal power satisfaction 0.007 of 4th lens group 240≤| φ240|≤
0.008, the focal power of the non-spherical reflector 300 meets 0.03≤| φ300|≤0.033.When lens group is according to above-mentioned light focus
During degree distribution, it can be achieved less than 0.18 and project ratio, not empty Jiao of high temperature, and the susceptibility of device build-up tolerance can be greatly lowered,
Mass production can be carried out.
3rd lens group focal power is negative, and the second lens group focal power is just, the 3rd lens group and the second lens group uses
Synchronization-moving mode, the 3rd lens group and the second lens group focal power meet：6.5≤|φ230/φ220|≤6.8, the 3rd is saturating
Microscope group uses Glass aspheric, and two sides bends towards dmd chip, and the second lens group 220 is Glass aspheric, and two sides is backwards to DMD
Chip, conditions above meets simultaneously after, the conjugation under different projection distances is can compensate for apart from variable quantity, realizes large range of throwing
Distance, while the curvature of field under recoverable difference projection distance and distortion are penetrated, the resolution ratio under different projection distances is kept constant.
As depicted in figs. 1 and 2, in the present embodiment, the focal power φ of the 11st lens 1111Be it is negative, the described tenth
The focal power φ of lens 1010For just, focal power meets 0.8≤| φ11/φ10|≤0.9；The focal power of 13rd lens 13
φ13It is negative, the focal power φ of the 12nd lens 1212For just, focal power meets 0.2≤| φ13/φ12|≤0.3.It can subtract
The size of small non-spherical reflector, so that Optical devices small volume.
As depicted in figs. 1 and 2, in the present embodiment, the focal power of the 6th lens 6 is negative, focal power φ6Meet：
0.008≤|φ6|≤0.009；The two sides of 6th lens 6 bends towards dmd chip；Stop spherical aberration caused by recoverable diaphragm
And coma, and the height of light is organized after can increasing, realize compared with large aperture, lift projection image brightness；5th lens 5
Focal power for just, the focal powers of the 4th lens 4 be it is negative, satisfaction 0.04≤| φ4/φ5|≤0.041；Refractive index satisfaction 0.3≤
(ND4-ND5)≤0.4；The two sides of 4th lens 4 bends towards non-spherical reflector 300；The focal power of 3rd lens 3
For just, the focal power of second lens 2 is negative, meet 0.014≤| φ2/φ3|≤0.016；Refractive index satisfaction 0.4≤
(ND2-ND3)≤0.43.The senior aberration of device can be greatly lowered, lifting device resolution ratio, reduce sensitivity of the device to aberration
Degree, realizes mass production.First lens 1 use Glass aspheric, distortion and astigmatism caused by the other eyeglasses of means for correcting, make
Device finally gives the imaging of high quality.
As depicted in figs. 1 and 2, in the present embodiment, second lens 2 pass through optical glue with the 3rd lens 3
Bonding, the 4th lens 4 are bonded with the 5th lens 5 by optical glue.
As depicted in figs. 1 and 2, in the present embodiment, first lens 1, the 6th lens 6, the 8th lens the 9, the 9th are saturating
Mirror 10 and non-spherical reflector 300 are Glass aspheric eyeglass.
As depicted in figs. 1 and 2, in the present embodiment, first lens 1, the 6th lens 6, the 8th lens the 8, the 9th are saturating
The aspherical surface shape of mirror 9 and non-spherical reflector 300 meets equation：
Parameter c is the curvature corresponding to radius in aforesaid equation, 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, when k systems
When number is 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；α1To α8Point
The coefficient corresponding to each radial coordinate is not represented.
The actual design parameter for the ultrashort zoom lens that following case is 0.18 projection ratio, resolution ratio is 1080P：
Non-spherical reflector S1 coefficient is：
k：-1.484
a1：0
a2：-4.1775889e-008
a3：-1.7469322e-011
a4：1.7400545e-015
a5：-1.3744689e-019
a6：5.819994e-024
a7：-9.0128358e-029
First face S10 of the 9th lens 9 coefficient is：
k：-1.209079
a1：0
a2：1.4598802e-005
a3：7.3836402e-009
a4：-1.0722255e-010
a5：2.2856103e-013
a6：-2.2696405e-016
a7：5.7114412e-020
Second face S11 of the 9th lens 9 coefficient is：
k：-0.7290704
a1：0
a2：3.2176776e-005
a3：1.5832509e-007
a4：5.9875149e-011
a5：-8.0436318e-013
a6：2.8736159e-015
a7：4.7557297e-018
First face S12 of the 8th lens 8 coefficient is：
k：14.41962
a1：0
a2：7.714615e-007
a3：-4.3287749e-009
a4：-3.2946437e-011
a5：-9.887032e-014
a6：-1.4271619e-015
a7：-6.8875224e-018
a8：-1.7003567e-020
Second face S13 of the 8th lens 8 coefficient is：
k：-0.7130752
a1：0
a2：-1.4711743e-006
a3：4.3075608e-009
a4：-4.7317027e-011
a5：-2.0277632e-013
a6：-1.4895262e-016
a7：1.5629029e-018
a8：-7.1817264e-020
First face S17 of the 6th lens 6 coefficient is：
k：21.03896
a1：0
a2：-7.4996101e-005
a3：9.4385801e-007
a4：-2.6751325e-008
a5：-4.8054944e-010
a6：2.7932337e-011
a7：-3.046491e-013
Second face S18 of the 6th lens 6 coefficient is：
k：0.6876403
a1：0
a2：-4.9595905e-005
a3：2.787858e-007
a4：1.0856431e-008
a5：-1.5897707e-010
a6：-1.7977373e-011
a7：4.0060191e-013
First face S25 of the first lens 1 coefficient is：
k：-1.789004
a1：0
a2：8.263905e-006
a3：-1.7911823e-008
a4：3.7017951e-011
a5：4.6598193e-014
a6：7.4790277e-017
a7：6.4726266e-019
Second face S26 of the first lens 1 coefficient is：
k：-0.5580475
a1：0
a2：-2.9634338e-005
a3：2.3313592e-008
a4：-5.5797887e-011
a5：1.3393404e-013
a6：2.4826738e-016
a7：6.2566959e-019
The projection scope of ultrashort out-of-focus projection's camera lens is 0.35m to 0.6m, and during ultrashort out-of-focus projection's lens focusing, mobile first is saturating
Burnt after microscope group adjustment, adjusting range is ± 0.1mm, and after rear Jiao adjusts, the first lens group is fixed, the second lens group and the
The linkage of three lens groups is focused, and interval variation scope during focusing between each lens group is as follows：First lens group and second saturating
Between microscope group at intervals of 17.1mm~19.28mm, between the second lens group and the 3rd lens group at intervals of 14.6mm~
13.5mm, between the 3rd lens group and the 4th lens group at intervals of 2.0mm~1.0mm.
Claims (9)
1. a kind of ultrashort out-of-focus projection's Optical devices, it is characterised in that be disposed with projecting direction：Illuminator (100),
Refractor component (200), non-spherical reflector (300)；The illuminator (100) includes dmd chip (110), equivalent rib
Mirror (120)；
The refractor component (200) includes：
Can movable the first lens group (210) of dmd chip (110), the focal power of first lens group (210) be relatively
Just；
Can movable the second lens group (220) of dmd chip (110), the focal power of second lens group (220) be relatively
Just；
Can the 3rd movable lens group (230) of dmd chip (110), the focal power of the 3rd lens group (230) be relatively
It is negative；
Fourth lens group (240) static with respect to dmd chip (110), the focal power of the 4th lens group (240) is just.
A kind of 2. ultrashort out-of-focus projection's Optical devices according to claim 1, it is characterised in that：The first described lens group
(210) include set gradually along projecting direction the first lens (1), the second lens (2), the 3rd lens (3), the 4th lens (4),
5th lens (5), the 6th lens (6), diaphragm (14) and the 7th lens (7)；Second lens group (220) includes the 8th lens
(8)；3rd lens group (230) includes the 9th lens (9)；4th lens group (240) is included along projecting direction successively
The tenth lens (10), the 11st lens (11), the 12nd lens (12) and the 13rd lens (13) set.
A kind of 3. ultrashort out-of-focus projection's Optical devices according to claim 1, it is characterised in that：Described dmd chip (110)
Placed relative to optical axis deviation so that the center of dmd chip (110) is 0.8mm-1mm with optical axis deviation distance.
A kind of 4. ultrashort out-of-focus projection's Optical devices according to claim 1, it is characterised in that：First lens group
(210) focal power satisfaction 0.03≤| φ210|≤0.04；The focal power satisfaction 0.004 of second lens group (220)≤|
φ220|≤0.005；The focal power satisfaction 0.03 of 3rd lens group (230)≤| φ230|≤0.035；4th lens
The focal power satisfaction 0.007 of group (240)≤| φ240|≤0.008, the focal power of the non-spherical reflector (300) meets 0.03
≤|φ300|≤0.033。
A kind of 5. ultrashort out-of-focus projection's Optical devices according to claim 2, it is characterised in that：11st lens (11)
Focal power φ11It is negative, the focal power φ of the tenth lens (10)10For just, focal power meets 0.8≤| φ11/φ10|≤
0.9；The focal power φ of 13rd lens (13)13It is negative, the focal power φ of the 12nd lens (12)12For just, light focus
Degree satisfaction 0.2≤| φ13/φ12|≤0.3。
A kind of 6. ultrashort out-of-focus projection's Optical devices according to claim 2, it is characterised in that：6th lens (6)
Focal power is negative, focal power φ6Meet：0.008≤|φ6|≤0.009；The two sides of 6th lens (6) bends towards DMD cores
Piece (110)；The focal power of 5th lens (5) is just, the focal power of the 4th lens (4) is negative, and the 4th lens (4) two sides is equal
Bending towards non-spherical reflector (300), focal power meets 0.04≤| φ4/φ5|≤0.041, refractive index meets 0.3≤(ND4-
ND5)≤0.4；The focal power of 3rd lens (3) is just, the focal power of second lens (2) is negative, the second lens (2)
Two sides bend towards non-spherical reflector (300), focal power meets 0.014≤| φ2/φ3|≤0.016, refractive index meets 0.4
≤(ND2-ND3)≤0.43。
A kind of 7. ultrashort out-of-focus projection's Optical devices according to claim 6, it is characterised in that：Second lens (2) with
3rd lens (3) are bonded by optical glue, and the 4th lens (4) pass through optical glue with the 5th lens (5)
Bonding.
A kind of 8. ultrashort out-of-focus projection's Optical devices according to claim 2, it is characterised in that：First lens (1),
Six lens (6), the 8th lens (8), the 9th lens (9) and non-spherical reflector (300) are Glass aspheric eyeglass.
A kind of 9. ultrashort out-of-focus projection's Optical devices according to claim 8, it is characterised in that：First lens (1),
Six lens (6), the 8th lens (9), the aspherical surface shape of the 9th lens (10) and non-spherical reflector (300) meet equation
Formula：
Parameter c is the curvature corresponding to radius in aforesaid equation, and 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；α1To α8Represent respectively each
Coefficient corresponding to radial coordinate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720319814.0U CN206638898U (en) | 2017-03-28 | 2017-03-28 | A kind of ultrashort out-of-focus projection's Optical devices |
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|---|---|---|---|
| CN201720319814.0U CN206638898U (en) | 2017-03-28 | 2017-03-28 | A kind of ultrashort out-of-focus projection's Optical devices |
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ID=60262444
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113126253A (en) * | 2021-03-04 | 2021-07-16 | 重庆融豪太视科技有限公司 | High-resolution direct-injection type short-focus projection lens |
-
2017
- 2017-03-28 CN CN201720319814.0U patent/CN206638898U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113126253A (en) * | 2021-03-04 | 2021-07-16 | 重庆融豪太视科技有限公司 | High-resolution direct-injection type short-focus projection lens |
| CN113126253B (en) * | 2021-03-04 | 2022-06-21 | 重庆融豪太视科技有限公司 | High-resolution direct-injection type short-focus projection lens |
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