CN107728295A - Projection lens - Google Patents
Projection lens Download PDFInfo
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- CN107728295A CN107728295A CN201711166983.6A CN201711166983A CN107728295A CN 107728295 A CN107728295 A CN 107728295A CN 201711166983 A CN201711166983 A CN 201711166983A CN 107728295 A CN107728295 A CN 107728295A
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- 230000003287 optical effect Effects 0.000 claims abstract description 20
- 239000000571 coke Substances 0.000 claims abstract description 15
- 230000035515 penetration Effects 0.000 claims description 8
- 238000003384 imaging method Methods 0.000 description 20
- 230000004075 alteration Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000009738 saturating Methods 0.000 description 5
- 230000000007 visual effect Effects 0.000 description 5
- 240000001439 Opuntia Species 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 201000009310 astigmatism Diseases 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- G02B13/003—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 two lenses
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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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
This application discloses a kind of projection lens, the camera lens is extremely sequentially included along optical axis by image source side into image side：First lens and the second lens.Wherein, the first lens have negative power, and its image source side surface is concave surface, and image side surfaces are convex surface；Second lens have positive light coke, and its image side surfaces is convex surface.
Description
Technical field
The application is related to a kind of projection lens, more specifically, the application is related to a kind of projection lens for including two panels lens.
Background technology
With the fast development of science and technology, interactive device progressively rises, and the application of projection lens is also more and more wider.Such as
The present, chip technology are quickly grown with intelligent algorithm, and to space object projects images and the image is received using optical projection lenses
Signal, you can calculate the 3-D view with depth information.3-D view with depth information can be further used for
In a variety of good application exploitations such as bio-identification.
For the conventional projection camera lens of imaging, generally various aberrations are eliminated simultaneously by using the mode of increase lens numbers
Improve resolution ratio.But increase lens numbers can cause the optics total length of projection lens to increase, so as to be unfavorable for realizing camera lens
Miniaturization.In addition, in general projection lens can also have the problems such as amount of distortion is big, image quality is poor.
The content of the invention
This application provides be applicable to portable type electronic product, can at least solve or part solve it is of the prior art
The projection lens of above-mentioned at least one shortcoming.
On the one hand, this application provides such a projection lens, the camera lens along optical axis by image source side into image side sequentially
Including：First lens and the second lens.Wherein, the first lens can have negative power, and its image source side surface can be concave surface, imaging
Side surface can be convex surface；Second lens can have positive light coke, and its image side surfaces can be convex surface.
In one embodiment, the object-side numerical aperture NA of projection lens can meet NA >=0.18.
In one embodiment, the maximum angle of half field-of view HFOV of projection lens can meet 15 ° of HFOV ＜.
In one embodiment, the optics total length TTL of projection lens can meet 3mm ＜ TTL ＜ 3.7mm.
In one embodiment, in 800nm to 1000nm light-wave band, the light penetration of projection lens can be big
In 85%.
In one embodiment, total effective focal length f of the effective focal length f2 of the second lens and projection lens can meet 0.7
＜ f2/f ＜ 1.2.
In one embodiment, the radius of curvature R 4 of the image side surfaces of the second lens and total effectively Jiao of projection lens
It can meet -0.6 ＜ R4/f ＜ -0.2 away from f.
In one embodiment, the image source side table of the lens of radius of curvature R 2 and first of the image side surfaces of the first lens
The radius of curvature R 1 in face can meet (R2-R1)/(R2+R1) ＜ 0.5.
In one embodiment, the effective half bore DT22 and the second lens of the image side surfaces of the second lens image source
Effective half bore DT21 of side surface can meet 1.0 ＜ DT22/DT21 ＜ 1.3.
On the other hand, present invention also provides such a projection lens, the camera lens is along optical axis by image source side extremely into image side
Sequentially include：First lens and the second lens.Wherein, the first lens can have negative power, and its image source side surface can be concave surface,
Image side surfaces can be convex surface；Second lens can have positive light coke, and its image side surfaces can be convex surface；And wherein, projection
The optics total length TTL of camera lens can meet 3mm ＜ TTL ＜ 3.7mm.
Another aspect, present invention also provides such a projection lens, and the camera lens is along optical axis by image source side extremely into image side
Sequentially include：First lens and the second lens.Wherein, the first lens can have negative power, and its image source side surface can be concave surface,
Image side surfaces can be convex surface；Second lens can have positive light coke, and its image side surfaces can be convex surface；And wherein, projection
The maximum angle of half field-of view HFOV of camera lens can meet 15 ° of HFOV ＜.
Another aspect, present invention also provides such a projection lens, and the camera lens is along optical axis by image source side extremely into image side
Sequentially include：First lens and the second lens.Wherein, the first lens can have negative power, and its image source side surface can be concave surface,
Image side surfaces can be convex surface；Second lens can have positive light coke, and its image side surfaces can be convex surface；And wherein,
In 800nm to 1000nm light-wave band, the light penetration of projection lens can be more than 85%.
Another aspect, present invention also provides such a projection lens, and the camera lens is along optical axis by image source side extremely into image side
Sequentially include：First lens and the second lens.Wherein, the first lens can have negative power, and its image source side surface can be concave surface,
Image side surfaces can be convex surface；Second lens can have positive light coke, and its image side surfaces can be convex surface；And wherein, second
The radius of curvature R 4 of the image side surfaces of lens can meet -0.6 ＜ R4/f ＜ -0.2 with total effective focal length f of projection lens.
Another aspect, present invention also provides such a projection lens, and the camera lens is along optical axis by image source side extremely into image side
Sequentially include：First lens and the second lens.Wherein, the first lens can have negative power, and its image source side surface can be concave surface,
Image side surfaces can be convex surface；Second lens can have positive light coke, and its image side surfaces can be convex surface；And wherein, second
Effective half bore DT22 of the image side surfaces of lens and effective half bore DT21 of the image source side surface of the second lens can meet
1.0 ＜ DT22/DT21 ＜ 1.3.
The application employs multi-disc (for example, two panels) lens, by each power of lens of reasonable distribution, face type, each
Spacing etc. on axle between the center thickness of mirror and each lens so that above-mentioned projection lens have miniaturization, large-numerical aperture,
At least one beneficial effect such as high image quality.
Brief description of the drawings
With reference to accompanying drawing, by the detailed description of following non-limiting embodiment, other features of the application, purpose and excellent
Point will be apparent.In the accompanying drawings：
Fig. 1 shows the structural representation of the projection lens according to the embodiment of the present application 1；
Fig. 2A to Fig. 2 B respectively illustrates the distortion curve and ratio chromatism, curve of the projection lens of embodiment 1；
Fig. 3 shows the structural representation of the projection lens according to the embodiment of the present application 2；
Fig. 4 A to Fig. 4 B respectively illustrate the distortion curve and ratio chromatism, curve of the projection lens of embodiment 2；
Fig. 5 shows the structural representation of the projection lens according to the embodiment of the present application 3；
Fig. 6 A to Fig. 6 B respectively illustrate the distortion curve and ratio chromatism, curve of the projection lens of embodiment 3；
Fig. 7 shows the structural representation of the projection lens according to the embodiment of the present application 4；
Fig. 8 A to Fig. 8 B respectively illustrate the distortion curve and ratio chromatism, curve of the projection lens of embodiment 4；
Fig. 9 shows the structural representation of the projection lens according to the embodiment of the present application 5；
Figure 10 A to Figure 10 B show the distortion curve and ratio chromatism, curve of the projection lens of embodiment 5.
Embodiment
In order to more fully understand the application, refer to the attached drawing is made into more detailed description to the various aspects of the application.Should
Understand, these describe the description of the simply illustrative embodiments to the application in detail, rather than limit the application in any way
Scope.In the specification, identical reference numbers identical element.Stating "and/or" includes associated institute
Any and all combinations of one or more of list of items.
It should be noted that in this manual, the statement of first, second grade is only used for a feature and another feature differentiation
Come, and do not indicate that any restrictions to feature.Therefore, it is discussed below in the case of without departing substantially from teachings of the present application
First lens are also known as the second lens, and the second lens are also known as the first lens.
In the accompanying drawings, for convenience of description, thickness, the size and dimension of lens are somewhat exaggerated.Specifically, accompanying drawing
Shown in sphere or aspherical shape be illustrated by way of example.That is, sphere or aspherical shape is not limited to accompanying drawing
In the sphere that shows or aspherical shape.Accompanying drawing is merely illustrative and and non-critical drawn to scale.
Herein, near axis area refers to the region near optical axis.If lens surface is convex surface and does not define the convex surface position
When putting, then it represents that the lens surface is extremely convex surface less than near axis area；If lens surface is concave surface and does not define the concave surface position
When, then it represents that the lens surface is extremely concave surface less than near axis area.It is referred to as image source near the surface of image source side in each lens
Side surface, it is referred to as image side surfaces near the surface into image side in each lens.
It will also be appreciated that term " comprising ", " including ", " having ", "comprising" and/or " including ", when in this theory
Represent stated feature, element and/or part be present when being used in bright book, but do not preclude the presence or addition of one or more
Further feature, element, part and/or combinations thereof.In addition, ought the statement of such as " ... at least one " appear in institute
When after the list of row feature, whole listed feature, rather than the individual component in modification list are modified.In addition, work as description originally
During the embodiment of application, represented " one or more embodiments of the application " using "available".Also, term " exemplary "
It is intended to refer to example or illustration.
Unless otherwise defined, otherwise all terms (including technical terms and scientific words) used herein be respectively provided with
The application one skilled in the art's is generally understood that identical implication.It will also be appreciated that term (such as in everyday words
Term defined in allusion quotation) implication consistent with their implications in the context of correlation technique should be interpreted as having, and
It will not explained with idealization or excessively formal sense, unless clearly so limiting herein.
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the application in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
The feature of the application, principle and other aspects are described in detail below.
It may include that such as two panels has the lens of focal power according to the projection lens of the application illustrative embodiments, i.e.
First lens and the second lens.This two panels lens is along optical axis by image source side extremely into image side sequential.
In the exemplary embodiment, the first lens can have negative power, and its image source side surface is concave surface, into image side table
Face is convex surface；Second lens have positive light coke, and its image side surfaces is convex surface.
In the exemplary embodiment, the projection lens of the application can meet 15 ° of conditional HFOV ＜, wherein, HFOV is
The maximum angle of half field-of view of projection lens.More specifically, HFOV can further meet 8 ° of 12 ° of ＜ HFOV ＜, for example, 8.5 °≤HFOV
≤11.3°.Meet that 15 ° of conditional HFOV ＜ are advantageous to control and reduce the aberration of the outer field of view of axle and lift projection quality；Together
When, also help field of view and the uniformity of field of view image quality outside axle and projection depth of focus in lift shaft.
In the exemplary embodiment, the projection lens of the application can meet conditional 3mm ＜ TTL ＜ 3.7mm, wherein,
TTL is the optics total length of projection lens.The optics total length of projection lens refers to from the image side surfaces of the second lens
Distance of the heart to image source (for example, surface of the spatial light modulator for modulating projection signal) on optical axis.More specifically,
TTL can further meet 3.25mm≤TTL≤3.51mm.Meet conditional 3mm ＜ TTL ＜ 3.7mm, be advantageously implemented projection lens
The miniaturization of head, all kinds of portable type electronic products are broadly equipped on so as to be advantageous to the projection lens.
In the exemplary embodiment, the projection lens of the application can meet the ＜ f2/f ＜ 1.2 of conditional 0.7, wherein, f2
For the effective focal length of the second lens, f is total effective focal length of projection lens.More specifically, f2 and f can further meet 0.80≤
f2/f≤1.16.Rationally the second power of lens of control, be advantageous to balance miniaturization and the projection imaging quality of camera lens.
In the exemplary embodiment, the projection lens of the application can meet conditional NA >=0.18, wherein, NA is projection
The object-side numerical aperture of camera lens.More specifically, NA can further meet NA=0.20.Projection lens has larger numerical aperture
Footpath, projection energy efficiency can be improved, so as to obtain the projected image of more high brightness.
In the exemplary embodiment, the projection lens of the application in about 800nm into about 1000nm light-wave band, light
Line transmitance is more than 85%.It is such to be provided with beneficial to transmitance of the near infrared light through projection lens is improved, so as to obtain
The near-infrared projected image of more high brightness.
In the exemplary embodiment, the projection lens of the application can meet the ＜ R4/f of conditional -0.6 ＜ -0.2, wherein,
R4 is the radius of curvature of the image side surfaces of the second lens, and f is total effective focal length of projection lens.More specifically, R4 and f enter one
Step can meet -0.54≤R4/f≤- 0.40.Rationally control R4 and f ratio, be advantageous to reduce the astigmatism of projection lens, lifting
Projection imaging quality.
In the exemplary embodiment, the projection lens of the application can meet conditional (R2-R1)/(R2+R1) ＜ 0.5,
Wherein, R2 is the radius of curvature of the image side surfaces of the first lens, and R1 is the radius of curvature of the image source side surface of the first lens.More
Specifically, R2 and R1 can further meet 0 ＜ (R2-R1)/(R2+R1) ＜ 0.5, for example, 0.13≤(R2-R1)/(R2+R1)≤
0.47.Meet conditional (R2-R1)/(R2+R1) ＜ 0.5, be advantageous to the processing and manufacturing of the first lens；At the same time it can also avoid
The tolerance sensitivities increase being led to because radius of curvature is too small.
In the exemplary embodiment, the projection lens of the application can meet the ＜ DT22/DT21 ＜ 1.3 of conditional 1.0, its
In, DT22 is effective half bore of the image side surfaces of the second lens, and DT21 is effectively the half of the image source side surface of the second lens
Bore.More specifically, DT22 and DT21 can further meet 1.05≤DT22/DT21≤1.19.Meet the ＜ of conditional 1.0
DT22/DT21 ＜ 1.3, be advantageous to avoid due to light overflexing and caused by image quality decline；Meanwhile also help
Avoid tolerance sensitivity higher and be led to the problems such as being not easy to fabricate.
In the exemplary embodiment, above-mentioned projection lens may also include at least one diaphragm, to lift the imaging of camera lens
Quality.Diaphragm can be arranged as required to locate at an arbitrary position, for example, diaphragm may be provided at the second lens and between image side.
Alternatively, above-mentioned projection lens may also include other known optical projection elements, for example, prism, field lens etc..
Such as two panels lens can be used according to the projection lens of the above-mentioned embodiment of the application, it is each by reasonable distribution
Spacing etc. on axle between the focal power of mirror, face type, the center thickness of each lens and each lens so that projection lens has small
At least one beneficial effects such as type, large-numerical aperture, hyposensitivity, high image quality.
In presently filed embodiment, at least one in the minute surface of each lens is aspherical mirror.Non-spherical lens
The characteristics of be：From lens centre to lens perimeter, curvature is consecutive variations.It is constant with having from lens centre to lens perimeter
The spherical lens of curvature is different, and non-spherical lens has more preferably radius of curvature characteristic, and there is improvement to distort aberration and improve picture
The advantages of dissipating aberration.After non-spherical lens, the aberration occurred when imaging can be eliminated as much as possible, so as to improve
Image quality.
However, it will be understood by those of skill in the art that without departing from this application claims technical scheme situation
Under, the lens numbers for forming projection lens can be changed, to obtain each result and advantage described in this specification.Though for example,
So it is described in embodiments by taking two panels lens as an example, but the projection lens is not limited to include two panels lens.If
Need, the projection lens may also include the lens of other quantity.
The specific embodiment for the projection lens for being applicable to above-mentioned embodiment is further described with reference to the accompanying drawings.
Embodiment 1
Projection lens referring to Fig. 1 to Fig. 2 B descriptions according to the embodiment of the present application 1.Fig. 1 is shown according to the application
The structural representation of the projection lens of embodiment 1.
As shown in figure 1, according to the projection lens of the application illustrative embodiments along optical axis by image source side into image side according to
Sequence includes：First lens E1, the second lens E2 and diaphragm STO.
First lens E1 has negative power, and its image source side surface S1 is concave surface, and image side surfaces S2 is convex surface.Second is saturating
Mirror E2 has positive light coke, and its image source side surface S3 is concave surface, and image side surfaces S4 is convex surface.In about 800nm to about 1000nm
In light-wave band, the light penetration of the projection lens is more than 85%.Light from image source sequentially passes through each surface S1 to S4 simultaneously
It is ultimately imaged the (not shown) on the imaging surface of such as projection screen.
Table 1 shows surface type, radius of curvature, thickness, material and the circular cone of each lens of the projection lens of embodiment 1
Coefficient, wherein, the unit of radius of curvature and thickness is millimeter (mm).
Table 1
As shown in Table 1, the first lens E1 image source side surface S1 and image side surfaces S2 and the second lens E2 image source
Side surface S3 and image side surfaces S4 is aspherical.In the present embodiment, the face type x of each non-spherical lens is available but unlimited
It is defined in following aspherical formula：
Wherein, x be it is aspherical along optical axis direction when being highly h position, away from aspheric vertex of surface apart from rise；C is
Aspherical paraxial curvature, c=1/R (that is, paraxial curvature c is the mean curvature radius R of upper table 1 inverse)；K be circular cone coefficient (
Provided in table 1)；Ai is the correction factor of aspherical i-th-th ranks.Table 2 below is given available for each aspherical in embodiment 1
Minute surface S1-S4 high order term coefficient A4、A6、A8、A10And A12。
| Face number | A4 | A6 | A8 | A10 | A12 |
| S1 | -3.1511E-01 | -4.7845E-01 | 1.1704E+00 | -3.5529E+00 | 3.1022E+00 |
| S2 | -1.9839E-01 | 2.7878E-02 | -1.0343E-01 | 7.7254E-02 | -7.2984E-03 |
| S3 | -4.5669E-03 | 8.2476E-02 | -8.0116E-02 | 5.1704E-02 | -1.8540E-02 |
| S4 | 1.6442E-02 | 1.4075E-02 | 2.1974E-02 | -1.2275E-02 | -7.8684E-04 |
Table 2
Table 3 provides effective focal length f1 and f2, the projection lens of total effective focal length f of projection lens, each lens in embodiment 1
Optics total length TTL, projection lens maximum angle of half field-of view HFOV and projection lens object-side numerical aperture NA.
| Parameter | f(mm) | f1(mm) | f2(mm) | TTL(mm) | HFOV(°) | NA |
| Numerical value | 3.19 | -16.01 | 2.93 | 3.50 | 8.9 | 0.20 |
Table 3
Projection lens in embodiment 1 meets：
F2/f=0.92, wherein, f2 is the second lens E2 effective focal length, and f is total effective focal length of projection lens；
R4/f=-0.44, wherein, R4 is the second lens E2 image side surfaces S4 radius of curvature, and f is projection lens
Total effective focal length；
(R2-R1)/(R2+R1)=0.28, wherein, R2 be the first lens E1 image side surfaces S2 radius of curvature, R1
For the first lens E1 image source side surface S1 radius of curvature；
DT22/DT21=1.08, wherein, DT22 be the second lens E2 image side surfaces S4 effective half bore, DT21
For the second lens E2 image source side surface S3 effective half bore.
Fig. 2A shows the distortion curve of the projection lens of embodiment 1, and it represents the distortion size in the case of different visual angles
Value.Fig. 2 B show the ratio chromatism, curve of the projection lens of embodiment 1, its represent light via after camera lens on imaging surface
The deviation of different image heights.Understand that the projection lens given by embodiment 1 can realize good imaging according to Fig. 2A to Fig. 2 B
Quality.
Embodiment 2
Projection lens referring to Fig. 3 to Fig. 4 B descriptions according to the embodiment of the present application 2.In the present embodiment and following implementation
In example, for brevity, by clipped description similar to Example 1.Fig. 3 shows the throwing according to the embodiment of the present application 2
The structural representation of shadow camera lens.
As shown in figure 3, according to the projection lens of the application illustrative embodiments along optical axis by image source side into image side according to
Sequence includes：First lens E1, the second lens E2 and diaphragm STO.
First lens E1 has negative power, and its image source side surface S1 is concave surface, and image side surfaces S2 is convex surface.Second is saturating
Mirror E2 has positive light coke, and its image source side surface S3 is convex surface, and image side surfaces S4 is convex surface.In about 800nm to about 1000nm
In light-wave band, the light penetration of the projection lens is more than 85%.Light from image source sequentially passes through each surface S1 to S4 simultaneously
It is ultimately imaged the (not shown) on the imaging surface of such as projection screen.
Table 4 shows surface type, radius of curvature, thickness, material and the circular cone of each lens of the projection lens of embodiment 2
Coefficient, wherein, the unit of radius of curvature and thickness is millimeter (mm).
Table 4
As shown in Table 4, in example 2, the first lens E1 image source side surface S1 and image side surfaces S2 and second
Lens E2 image source side surface S3 and image side surfaces S4 is aspherical.Table 5 is shown available for each aspherical in embodiment 2
The high order term coefficient of minute surface, wherein, each aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.
| Face number | A4 |
| S1 | 0.0000E+00 |
| S2 | -2.6235E-03 |
| S3 | 0.0000E+00 |
| S4 | 0.0000E+00 |
Table 5
Table 6 provides total effective focal length f, the projection lens of the effective focal length f1 and f2 of each lens in embodiment 2, projection lens
Optics total length TTL, projection lens maximum angle of half field-of view HFOV and projection lens object-side numerical aperture NA.
| Parameter | f(mm) | f1(mm) | f2(mm) | TTL(mm) | HFOV(°) | NA |
| Numerical value | 2.99 | -4.23 | 2.40 | 3.50 | 11.3 | 0.20 |
Table 6
Fig. 4 A show the distortion curve of the projection lens of embodiment 2, and it represents the distortion size in the case of different visual angles
Value.Fig. 4 B show the ratio chromatism, curve of the projection lens of embodiment 2, its represent light via after camera lens on imaging surface
The deviation of different image heights.Understand that the projection lens given by embodiment 2 can realize good imaging according to Fig. 4 A to Fig. 4 B
Quality.
Embodiment 3
The projection lens according to the embodiment of the present application 3 is described referring to Fig. 5 to Fig. 6 B.Fig. 5 is shown according to this Shen
Please embodiment 3 projection lens structural representation.
As shown in figure 5, according to the projection lens of the application illustrative embodiments along optical axis by image source side into image side according to
Sequence includes：First lens E1, the second lens E2 and diaphragm STO.
First lens E1 has negative power, and its image source side surface S1 is concave surface, and image side surfaces S2 is convex surface.Second is saturating
Mirror E2 has positive light coke, and its image source side surface S3 is concave surface, and image side surfaces S4 is convex surface.In about 800nm to about 1000nm
In light-wave band, the light penetration of the projection lens is more than 85%.Light from image source sequentially passes through each surface S1 to S4 simultaneously
It is ultimately imaged the (not shown) on the imaging surface of such as projection screen.
Table 7 shows surface type, radius of curvature, thickness, material and the circular cone of each lens of the projection lens of embodiment 3
Coefficient, wherein, the unit of radius of curvature and thickness is millimeter (mm).
Table 7
As shown in Table 7, in embodiment 3, the first lens E1 image source side surface S1 and image side surfaces S2 and second
Lens E2 image source side surface S3 and image side surfaces S4 is aspherical.Table 8 is shown available for each aspherical in embodiment 3
The high order term coefficient of minute surface, wherein, each aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.
Table 8
Table 9 provides total effective focal length f, the projection lens of the effective focal length f1 and f2 of each lens in embodiment 3, projection lens
Optics total length TTL, projection lens maximum angle of half field-of view HFOV and projection lens object-side numerical aperture NA.
| Parameter | f(mm) | f1(mm) | f2(mm) | TTL(mm) | HFOV(°) | NA |
| Numerical value | 3.35 | -13.03 | 3.15 | 3.51 | 8.5 | 0.20 |
Table 9
Fig. 6 A show the distortion curve of the projection lens of embodiment 3, and it represents the distortion size in the case of different visual angles
Value.Fig. 6 B show the ratio chromatism, curve of the projection lens of embodiment 3, its represent light via after camera lens on imaging surface
The deviation of different image heights.Understand that the projection lens given by embodiment 3 can realize good imaging according to Fig. 6 A to Fig. 6 B
Quality.
Embodiment 4
The projection lens according to the embodiment of the present application 4 is described referring to Fig. 7 to Fig. 8 B.Fig. 7 is shown according to this Shen
Please embodiment 4 projection lens structural representation.
As shown in fig. 7, according to the projection lens of the application illustrative embodiments along optical axis by image source side into image side according to
Sequence includes：First lens E1, the second lens E2 and diaphragm STO.
First lens E1 has negative power, and its image source side surface S1 is concave surface, and image side surfaces S2 is convex surface.Second is saturating
Mirror E2 has positive light coke, and its image source side surface S3 is concave surface, and image side surfaces S4 is convex surface.In about 800nm to about 1000nm
In light-wave band, the light penetration of the projection lens is more than 85%.Light from image source sequentially passes through each surface S1 to S4 simultaneously
It is ultimately imaged the (not shown) on the imaging surface of such as projection screen.
Table 10 shows surface type, radius of curvature, thickness, material and the circle of each lens of the projection lens of embodiment 4
Coefficient is bored, wherein, the unit of radius of curvature and thickness is millimeter (mm).
Table 10
As shown in Table 10, in example 4, the first lens E1 image source side surface S1 and image side surfaces S2 and second
Lens E2 image source side surface S3 and image side surfaces S4 is aspherical.Table 11 is shown available for each aspheric in embodiment 4
The high order term coefficient of face minute surface, wherein, each aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.
| Face number | A4 | A6 | A8 | A10 |
| S1 | 7.4576E-01 | 8.2269E-01 | -5.6806E-01 | -1.4221E-01 |
| S2 | 3.4599E-01 | 8.2827E-01 | -3.3316E-01 | 1.1853E+00 |
| S3 | 9.0238E-02 | -1.1208E-01 | 8.6073E-02 | -2.3359E-02 |
| S4 | 1.0819E-02 | -5.1419E-03 | 3.8858E-04 | 9.7104E-04 |
Table 11
Table 12 provides the effective focal length f1 and f2, total effective focal length f of projection lens, projection lens of each lens in embodiment 4
The optics total length TTL of head, maximum the angle of half field-of view HFOV and projection lens of projection lens object-side numerical aperture NA.
| Parameter | f(mm) | f1(mm) | f2(mm) | TTL(mm) | HFOV(°) | NA |
| Numerical value | 2.65 | -22.18 | 3.08 | 3.25 | 10.8 | 0.20 |
Table 12
Fig. 8 A show the distortion curve of the projection lens of embodiment 4, and it represents the distortion size in the case of different visual angles
Value.Fig. 8 B show the ratio chromatism, curve of the projection lens of embodiment 4, its represent light via after camera lens on imaging surface
The deviation of different image heights.Understand that the projection lens given by embodiment 4 can realize good imaging according to Fig. 8 A to Fig. 8 B
Quality.
Embodiment 5
The projection lens according to the embodiment of the present application 5 is described referring to Fig. 9 to Figure 10 B.Fig. 9 is shown according to this Shen
Please embodiment 5 projection lens structural representation.
As shown in figure 9, according to the projection lens of the application illustrative embodiments along optical axis by image source side into image side according to
Sequence includes：First lens E1, the second lens E2 and diaphragm STO.
First lens E1 has negative power, and its image source side surface S1 is concave surface, and image side surfaces S2 is convex surface.Second is saturating
Mirror E2 has positive light coke, and its image source side surface S3 is concave surface, and image side surfaces S4 is convex surface.In about 800nm to about 1000nm
In light-wave band, the light penetration of the projection lens is more than 85%.Light from image source sequentially passes through each surface S1 to S4 simultaneously
It is ultimately imaged the (not shown) on the imaging surface of such as projection screen.
Table 13 shows surface type, radius of curvature, thickness, material and the circle of each lens of the projection lens of embodiment 5
Coefficient is bored, wherein, the unit of radius of curvature and thickness is millimeter (mm).
Table 13
As shown in Table 13, in embodiment 5, the first lens E1 image source side surface S1 and image side surfaces S2 and second
Lens E2 image source side surface S3 and image side surfaces S4 is aspherical.Table 14 is shown available for each aspheric in embodiment 5
The high order term coefficient of face minute surface, wherein, each aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 1.0312E+00 | -1.4399E+00 | 9.9617E+00 | -5.1343E+01 | 1.5539E+02 | -2.5274E+02 | 1.5977E+02 |
| S2 | 8.2510E-01 | -4.9940E-01 | 9.6016E+00 | -5.6121E+01 | 1.8908E+02 | -3.1914E+02 | 2.0013E+02 |
| S3 | 4.3806E-02 | -5.7311E-02 | 9.6542E-02 | -7.9879E-02 | 4.1774E-02 | -1.2636E-02 | 1.6612E-03 |
| S4 | -1.6735E-02 | -1.5435E-02 | 1.6578E-02 | -2.5667E-02 | 2.2051E-02 | -1.0380E-02 | 2.0921E-03 |
Table 14
Table 15 provides the effective focal length f1 and f2, total effective focal length f of projection lens, projection lens of each lens in embodiment 5
The optics total length TTL of head, maximum the angle of half field-of view HFOV and projection lens of projection lens object-side numerical aperture NA.
| Parameter | f(mm) | f1(mm) | f2(mm) | TTL(mm) | HFOV(°) | NA |
| Numerical value | 3.17 | -5.79 | 3.03 | 3.45 | 9.1 | 0.20 |
Table 15
Figure 10 A show the distortion curve of the projection lens of embodiment 5, and it represents the distortion size in the case of different visual angles
Value.Figure 10 B show the ratio chromatism, curve of the projection lens of embodiment 5, its represent light via after camera lens on imaging surface
Different image heights deviation.Understand that the projection lens given by embodiment 5 can be realized good according to Figure 10 A to Figure 10 B
Image quality.
To sum up, embodiment 1 to embodiment 5 meets the relation shown in table 16 respectively.
Table 16
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.People in the art
Member should be appreciated that invention scope involved in the application, however it is not limited to the technology that the particular combination of above-mentioned technical characteristic forms
Scheme, while should also cover in the case where not departing from the inventive concept, carried out by above-mentioned technical characteristic or its equivalent feature
The other technical schemes for being combined and being formed.Such as features described above has similar work(with (but not limited to) disclosed herein
The technical scheme that the technical characteristic of energy is replaced mutually and formed.
Claims (10)
1. projection lens, extremely sequentially included into image side by image source side along optical axis：First lens and the second lens, it is characterised in that
First lens have negative power, and its image source side surface is concave surface, and image side surfaces are convex surface；
Second lens have positive light coke, and its image side surfaces is convex surface.
2. projection lens according to claim 1, it is characterised in that the object-side numerical aperture NA of the projection lens meets
NA≥0.18。
3. projection lens according to claim 1, it is characterised in that the maximum angle of half field-of view HFOV of the projection lens expires
Sufficient 15 ° of HFOV ＜.
4. projection lens according to claim 2, it is characterised in that the optics total length TTL of the projection lens meets
3mm ＜ TTL ＜ 3.7mm.
5. projection lens according to claim 1, it is characterised in that described in 800nm to 1000nm light-wave band
The light penetration of projection lens is more than 85%.
6. projection lens according to any one of claim 1 to 5, it is characterised in that effective Jiao of second lens
Total effective focal length f away from f2 and the projection lens meets 0.7 ＜ f2/f ＜ 1.2.
7. projection lens according to any one of claim 1 to 5, it is characterised in that second lens into image side
The radius of curvature R 4 on surface meets -0.6 ＜ R4/f ＜ -0.2 with total effective focal length f of the projection lens.
8. projection lens according to any one of claim 1 to 5, it is characterised in that first lens into image side
The radius of curvature R 2 on surface and the radius of curvature R 1 of the image source side surface of first lens meet (R2-R1)/(R2+R1) ＜
0.5。
9. projection lens according to any one of claim 1 to 5, it is characterised in that second lens into image side
Effective half bore DT22 on surface and effective half bore DT21 of the image source side surface of second lens meet 1.0 ＜ DT22/
DT21 ＜ 1.3.
10. projection lens, extremely sequentially included into image side by image source side along optical axis：First lens and the second lens, it is characterised in that
First lens have negative power, and its image source side surface is concave surface, and image side surfaces are convex surface；
Second lens have positive light coke, and its image side surfaces is convex surface；
Wherein, the optics total length TTL of the projection lens meets 3mm ＜ TTL ＜ 3.7mm.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711166983.6A CN107728295B (en) | 2017-11-21 | 2017-11-21 | Projection lens |
| PCT/CN2018/087037 WO2019100671A1 (en) | 2017-11-21 | 2018-05-16 | Projection lens |
| US16/231,147 US10996433B2 (en) | 2017-11-21 | 2018-12-21 | Projection lens assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711166983.6A CN107728295B (en) | 2017-11-21 | 2017-11-21 | Projection lens |
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| CN107728295B CN107728295B (en) | 2023-12-08 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109564338A (en) * | 2018-11-08 | 2019-04-02 | 深圳市汇顶科技股份有限公司 | Lens group, fingerprint identification device and electronic equipment |
| WO2019100671A1 (en) * | 2017-11-21 | 2019-05-31 | 浙江舜宇光学有限公司 | Projection lens |
| US10996433B2 (en) | 2017-11-21 | 2021-05-04 | Zhejiang Sunny Optical Co., Ltd. | Projection lens assembly |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106461914A (en) * | 2014-04-22 | 2017-02-22 | 达美生物识别科技有限公司 | Lens assembly for optical imaging |
| CN106932886A (en) * | 2017-05-17 | 2017-07-07 | 浙江舜宇光学有限公司 | Iris lens |
| CN207780339U (en) * | 2017-11-21 | 2018-08-28 | 浙江舜宇光学有限公司 | Projection lens |
-
2017
- 2017-11-21 CN CN201711166983.6A patent/CN107728295B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106461914A (en) * | 2014-04-22 | 2017-02-22 | 达美生物识别科技有限公司 | Lens assembly for optical imaging |
| CN106932886A (en) * | 2017-05-17 | 2017-07-07 | 浙江舜宇光学有限公司 | Iris lens |
| CN207780339U (en) * | 2017-11-21 | 2018-08-28 | 浙江舜宇光学有限公司 | Projection lens |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019100671A1 (en) * | 2017-11-21 | 2019-05-31 | 浙江舜宇光学有限公司 | Projection lens |
| US10996433B2 (en) | 2017-11-21 | 2021-05-04 | Zhejiang Sunny Optical Co., Ltd. | Projection lens assembly |
| CN109564338A (en) * | 2018-11-08 | 2019-04-02 | 深圳市汇顶科技股份有限公司 | Lens group, fingerprint identification device and electronic equipment |
| CN109564338B (en) * | 2018-11-08 | 2020-12-11 | 深圳市汇顶科技股份有限公司 | Lens group, fingerprint identification device and electronic equipment |
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