CN208297808U - projection lens - Google Patents
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- CN208297808U CN208297808U CN201820660376.9U CN201820660376U CN208297808U CN 208297808 U CN208297808 U CN 208297808U CN 201820660376 U CN201820660376 U CN 201820660376U CN 208297808 U CN208297808 U CN 208297808U
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Abstract
This application discloses a kind of projection lens, the projection lens is along optical axis by sequentially including: the first lens, the second lens and the third lens at image side to image source side.First lens have positive light coke；Second lens have negative power, are closely concave surface at image side surface, nearly image source side is convex surface；The third lens have positive light coke, are closely convex surface at image side surface.The total effective focal length f and the second lens of projection lens meet 3.0≤f/CT2 < 5.5 in the center thickness CT2 on optical axis.
Description
Technical field
This application involves a kind of projection lens, more specifically, this application involves a kind of projection lens including three pieces lens.
Background technique
In recent years, being constantly progressive with image science and technology, projection lens will be used wider and wider, and interactive projection is set
It is standby gradually to rise.In order to meet miniaturized electronic devices and interactive requirement, projection lens needs guaranteeing the same of miniaturization
When, there is biggish field angle and good image quality, to guarantee the acquisition of image information.
However, traditional projection lens usually eliminates various aberrations by increasing lens number, resolution ratio is improved, so
The overall length that will lead to projection lens increases, and is unfavorable for the miniaturization of camera lens.On the other hand, biggish field angle will lead to projection lens
The distortion of head is more difficult to control, and image quality is poor, is unfavorable for camera lens and projects accurate image information.
Utility model content
This application provides be applicable to miniaturized electronic devices, at least solve or part solve in the prior art
State the projection lens of at least one disadvantage.
On the one hand, this application provides such a projection lens, the camera lens along optical axis by image side to image source side according to
Sequence includes: the first lens, the second lens and the third lens.Wherein, the first lens can have positive light coke；Second lens can have
Negative power can be closely concave surface at image side surface, and nearly image source side can be convex surface；The third lens can have a positive light coke, closely at
Image side surface can be convex surface.Wherein, total effective focal length f of projection lens can expire with the second lens in the center thickness CT2 on optical axis
3.0≤f/CT2 of foot < 5.5.
In one embodiment, the second lens on optical axis center thickness CT2 and the second lens maximum effectively half
Edge thickness ET2 at diameter can meet 0.5 CT2/ET2≤1.6 <.
In one embodiment, the second lens exist in the center thickness CT2 on optical axis with the first lens and the second lens
Spacing distance T12 on optical axis can meet 0.3 < CT2/T12 < 1.0.
In one embodiment, total effective focal length f of the effective focal length f1 of first lens and projection lens can expire
1.0 < f1/f < 1.3 of foot.
In one embodiment, total effective focal length f of the projection lens and effective focal length f2 of the second lens can meet-
3.0 < f/f2 < 0.
In one embodiment, the effective focal length f2 of the second lens and the effective focal length f3 of the third lens can meet -2.5
< f2/f3 < -0.5.
In one embodiment, the radius of curvature R 4 of the nearly image source side of the second lens and the second lens is close at image side
The radius of curvature R 3 in face can meet 1.5 < R4/R3 < 5.0.
In one embodiment, the curvature of the nearly image source side of total effective focal length f and the first lens of projection lens half
Diameter R2 can meet -1.9 < f/R2 < -1.3.
In one embodiment, the intersection point of the nearly image source side of the second lens and optical axis is to the nearly image source side of the second lens
Distance SAG22 and second lens of the effective radius vertex on optical axis it is close at the intersection point of image side surface and optical axis to the second lens
Closely it can meet 0.8 < SAG22/SAG21 < 1.3 at distance SAG21 of the effective radius vertex of image side surface on optical axis.
In one embodiment, the refractive index N1 of the first lens and refractive index N2 of the second lens can meet (N1+N2)/
2≤1.63。
In one embodiment, the image source region diagonal line length of the Entry pupil diameters EPD of projection lens and projection lens
Half IH can meet 0.2 < EPD/IH < 0.7.
In one embodiment, the image source region diagonal line length of total effective focal length f and projection lens of projection lens
Half IH can meet 0.8 f/IH≤1.3 <.
In one embodiment, the nearly maximum effective radius DT11's and the third lens at image side surface of the first lens is close
0.2 < DT11/DT31 < 0.5 can be met at the maximum effective radius DT31 of image side surface.
In one embodiment, the nearly image source side of the third lens can be convex surface；Total effective focal length f of projection lens and
The radius of curvature R 6 of the nearly image source side of three lens can meet -1.0 < f/R6 < 0.
In one embodiment, the nearly image source side of the third lens can be concave surface；The effective focal length f2 of second lens and
The effective focal length f3 of three lens can meet -2.5 < f2/f3≤- 1.1；The radius of curvature R 4 of the nearly image source side of second lens with
The nearly radius of curvature R 3 at image side surface of second lens can meet 1.6 < R4/R3 < 2.5；And second lens on optical axis
The spacing distance T12 of center thickness CT2 and the first lens and the second lens on optical axis can meet 0.3 CT2/T12≤0.6 <.
On the other hand, this application provides such a projection lens, and the camera lens is along optical axis by image side to image source side
It sequentially include: the first lens, the second lens and the third lens.Wherein, the first lens can have positive light coke；Second lens can have
There is negative power, can be closely concave surface at image side surface, nearly image source side can be convex surface；The third lens can have positive light coke, close
It can be convex surface at image side surface.Wherein, the effective focal length f2 of the second lens and the effective focal length f3 of the third lens can meet -2.5 <
F2/f3 < -0.5.
Another aspect, present invention also provides such a projection lens, and the camera lens is along optical axis by image side to image source
Side sequentially includes: the first lens, the second lens and the third lens.Wherein, the first lens can have positive light coke；Second lens can
It can be closely concave surface at image side surface, nearly image source side can be convex surface with negative power；The third lens can have positive light coke,
It can be closely convex surface at image side surface.Wherein, the one of the image source region diagonal line length of total effective focal length f and projection lens of projection lens
Half IH can meet 0.8 f/IH≤1.3 <.
Another aspect, present invention also provides such a projection lens, and the camera lens is along optical axis by image side to image source
Side sequentially includes: the first lens, the second lens and the third lens.Wherein, the first lens can have positive light coke；Second lens can
It can be closely concave surface at image side surface, nearly image source side can be convex surface with negative power；The third lens can have positive light coke,
It can be closely convex surface at image side surface.Wherein, the intersection point of the nearly image source side of the second lens and optical axis is to the nearly image source side of the second lens
Distance SAG22 and second lens of the effective radius vertex on optical axis it is close at the intersection point of image side surface and optical axis to the second lens
Closely it can meet 0.8 < SAG22/SAG21 < 1.3 at distance SAG21 of the effective radius vertex of image side surface on optical axis.
Another aspect, present invention also provides such a projection lens, and the camera lens is along optical axis by image side to image source
Side sequentially includes: the first lens, the second lens and the third lens.Wherein, the first lens can have positive light coke；Second lens can
It can be closely concave surface at image side surface, nearly image source side can be convex surface with negative power；The third lens can have positive light coke,
It can be closely convex surface at image side surface.Wherein, the one of the image source region diagonal line length of the Entry pupil diameters EPD of projection lens and projection lens
Half IH can meet 0.2 < EPD/IH < 0.7.
Another aspect, present invention also provides such a projection lens, and the camera lens is along optical axis by image side to image source
Side sequentially includes: the first lens, the second lens and the third lens.Wherein, the first lens can have positive light coke；Second lens can
It can be closely concave surface at image side surface, nearly image source side can be convex surface with negative power；The third lens can have positive light coke,
It can be closely convex surface at image side surface.Wherein, the second lens on optical axis center thickness CT2 and the second lens in maximum effective radius
The edge thickness ET2 at place can meet 0.5 CT2/ET2≤1.6 <.
Another aspect, present invention also provides such a projection lens, and the camera lens is along optical axis by image side to image source
Side sequentially includes: the first lens, the second lens and the third lens.Wherein, the first lens can have positive light coke；Second lens can
It can be closely concave surface at image side surface, nearly image source side can be convex surface with negative power；The third lens can have positive light coke,
It can be closely convex surface at image side surface.Wherein, the nearly maximum effective radius DT11's and the third lens at image side surface of the first lens is close
0.2 < DT11/DT31 < 0.5 can be met at the maximum effective radius DT31 of image side surface.
The application uses three pieces lens, by reasonable selection lens material and each power of lens of reasonable distribution,
Face type, each lens center thickness and each lens between axis on spacing etc. so that above-mentioned projection lens have big field angle,
At least one beneficial effect such as minimize, can be applied to infrared band.
Detailed description of the invention
In conjunction with attached 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 schematic diagram 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 relative illumination curve of the projection lens of embodiment 1；
Fig. 3 shows the structural schematic diagram of the projection lens according to the embodiment of the present application 2；
Fig. 4 A to Fig. 4 B respectively illustrates the distortion curve and relative illumination curve of the projection lens of embodiment 2；
Fig. 5 shows the structural schematic diagram of the projection lens according to the embodiment of the present application 3；
Fig. 6 A to Fig. 6 B respectively illustrates the distortion curve and relative illumination curve of the projection lens of embodiment 3；
Fig. 7 shows the structural schematic diagram of the projection lens according to the embodiment of the present application 4；
Fig. 8 A to Fig. 8 B respectively illustrates the distortion curve and relative illumination curve of the projection lens of embodiment 4；
Fig. 9 shows the structural schematic diagram of the projection lens according to the embodiment of the present application 5；
Figure 10 A to Figure 10 B respectively illustrates the distortion curve and relative illumination curve of the projection lens of embodiment 5；
Figure 11 shows the structural schematic diagram of the projection lens according to the embodiment of the present application 6；
Figure 12 A to Figure 12 B respectively illustrates the distortion curve and relative illumination curve of the projection lens of embodiment 6；
Figure 13 shows the structural schematic diagram of the projection lens according to the embodiment of the present application 7；
Figure 14 A to Figure 14 B respectively illustrates the distortion curve and relative illumination curve of the projection lens of embodiment 7；
Figure 15 shows the structural schematic diagram of the projection lens according to the embodiment of the present application 8；
Figure 16 A to Figure 16 B respectively illustrates the distortion curve and relative illumination curve of the projection lens of embodiment 8；
Figure 17 shows the structural schematic diagrams according to the projection lens of the embodiment of the present application 9；
Figure 18 A to Figure 18 B respectively illustrates the distortion curve and relative illumination curve of the projection lens of embodiment 9；
Figure 19 shows the structural schematic diagram of the projection lens according to the embodiment of the present application 10；
Figure 20 A to Figure 20 B respectively illustrates the distortion curve and relative illumination curve of the projection lens of embodiment 10；
Figure 21 shows the structural schematic diagram of the projection lens according to the embodiment of the present application 11；
Figure 22 A to Figure 22 B respectively illustrates the distortion curve and relative illumination curve of the projection lens of embodiment 11；
Figure 23 shows the structural schematic diagram of the projection lens according to the embodiment of the present application 12；
Figure 24 A to Figure 24 B respectively illustrates the distortion curve and relative illumination curve of the projection lens of embodiment 12；
Figure 25 shows the structural schematic diagram of the projection lens according to the embodiment of the present application 13；
Figure 26 A to Figure 26 B respectively illustrates the distortion curve and relative illumination curve of the projection lens of embodiment 13.
Specific embodiment
Various aspects of the reference attached drawing to the application are made more detailed description by the application in order to better understand.It answers
Understand, the only description to the illustrative embodiments of the application is described in detail in these, rather than limits the application in any way
Range.In the specification, the identical element of identical reference numbers.Stating "and/or" includes associated institute
Any and all combinations of one or more of list of items.
It should be noted that in the present specification, the first, second equal statement is only used for a feature and another feature differentiation
It comes, without indicating any restrictions to feature.Therefore, discussed below 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 ease of description, thickness, the size and shape of lens are slightly exaggerated.Specifically, attached drawing
Shown in spherical surface or aspherical shape be illustrated by way of example.That is, spherical surface or aspherical shape are not limited to attached drawing
Shown in spherical surface or aspherical shape.Attached 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 convex surface position
When setting, then it represents that the lens surface is convex surface near axis area is less than；If lens surface is concave surface and does not define the concave surface position
When, then it represents that the lens surface is concave surface near axis area is less than.Surface in each lens close to image source side is known as nearly image source
Side is known as closely at image side surface in each lens close at the surface of image side.
It will also be appreciated that term " comprising ", " including ", " having ", "comprising" and/or " including ", when in this theory
It indicates there is stated feature, element and/or component when using in bright book, but does not preclude the presence or addition of one or more
Other feature, component, assembly unit and/or their combination.In addition, ought the statement of such as at least one of " ... " appear in institute
When after the list of column feature, entire listed feature is modified, rather than modifies the individual component in list.In addition, when describing this
When the embodiment of application, " one or more embodiments of the application " are indicated using "available".Also, term " illustrative "
It is intended to refer to example or illustration.
Unless otherwise defined, otherwise all terms (including technical terms and scientific words) used herein all have with
The application one skilled in the art's is generally understood identical meaning.It will also be appreciated that term (such as in everyday words
Term defined in allusion quotation) it should be interpreted as having and their consistent meanings of meaning in the context of the relevant technologies, and
It will not be explained with idealization or excessively formal sense, unless clear herein so limit.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described 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.
Projection lens according to the application illustrative embodiments may include the lens that such as three pieces have focal power, that is,
First lens, the second lens and the third lens.This three pieces lens is along optical axis by image side to image source side sequential.
In the exemplary embodiment, the first lens can have positive light coke；Second lens can have negative power, close
It can be concave surface at image side surface, nearly image source side can be convex surface；The third lens can have positive light coke, can be closely convex at image side surface
Face.
In the exemplary embodiment, the nearly image source side of the first lens can be convex surface.
The each power of lens of reasonable disposition and face type, can effectively shorten camera lens overall length, meet the needs of miniaturization.
In the exemplary embodiment, the projection lens of the application can meet 3.0≤f/CT2 of conditional < 5.5, wherein f
For total effective focal length of projection lens, CT2 is the second lens in the center thickness on optical axis.More specifically, f and CT2 are further
3.08≤f/CT2≤5.33 can be met.Meet 3.0≤f/CT2 of conditional < 5.5, is conducive to shorten camera lens overall length.
In the exemplary embodiment, the projection lens of the application can meet conditional (N1+N2)/2≤1.63, wherein
N1 is the refractive index of the first lens, and N2 is the refractive index of the second lens.More specifically, N1 and N2 can further meet 1.53≤
(N1+N2)/2≤1.63.It using the lower material of refractive index, can make system that there are preferable chromatic dispersion effects, and can have
Cost is saved on effect ground.
In the exemplary embodiment, the projection lens of the application can meet -3.0 < f/f2 < 0 of conditional, wherein f is
Total effective focal length of projection lens, f2 are the effective focal length of the second lens.More specifically, f and f2 can further meet -2.64≤
f/f2≤-0.30.Total effective focal length of reasonable distribution projection lens and the effective focal length of the second lens, can efficiently control light
Deviation, reduces the sensibility of camera lens, while being conducive to reduce spherical aberration, the astigmatism etc. of optical system, is conducive to improve projection lens
Image quality.
In the exemplary embodiment, the projection lens of the application can meet 0.8 < SAG22/SAG21 < 1.3 of conditional,
Wherein, SAG22 be the second lens nearly image source side and optical axis intersection point to the nearly image source side of the second lens effective radius top
Distance on the axis of point, SAG21 are the close at the intersection point of image side surface and optical axis to the second lens closely having at image side surface of the second lens
Imitate distance on the axis on radius vertex.More specifically, SAG22 and SAG21 can further meet 0.87≤SAG22/SAG21≤
1.24.The thickness of the second lens of reasonable disposition, so that the brightness uniformity at edge to center, so that relative illumination is effectively promoted,
And then improve the image quality of projection lens.
In the exemplary embodiment, the projection lens of the application can meet 1.0 < f1/f < 1.3 of conditional, wherein f1
For the effective focal length of the first lens, f is total effective focal length of projection lens.More specifically, f1 and f can further meet 1.07≤
f1/f≤1.18.Meet 1.0 < f1/f < 1.3 of conditional, so that total effective focal length of projection lens and the first lens is effective
The distribution of focal length is more reasonable, to be conducive to correct the spherical aberration of projection lens, improves the image quality of projection lens.
In the exemplary embodiment, the projection lens of the application can meet -2.5 < -0.5 < f2/f3 of conditional,
In, f2 is the effective focal length of the second lens, and f3 is the effective focal length of the third lens.More specifically, f2 and f3 can further meet-
2.14≤f2/f3≤-0.73.Meet -2.5 < -0.5 < f2/f3 of conditional, so that the focal power of the second lens and the third lens
Distribution it is more reasonable, thus be conducive to correct projection lens the curvature of field, improve the image quality of projection lens.
In the exemplary embodiment, the projection lens of the application can meet 1.5 < R4/R3 < 5.0 of conditional, wherein
R4 is the radius of curvature of the nearly image source side of the second lens, and R3 is the nearly radius of curvature at image side surface of the second lens.More specifically
Ground, R4 and R3 can further meet 1.67≤R4/R3≤4.86.Meet 1.5 < R4/R3 < 5.0 of conditional, so that the second lens
Curve it is more smooth, shape is more well-balanced, so as to effectively reduce the overall length of projection lens, increases the view of projection lens
Rink corner.
In the exemplary embodiment, the projection lens of the application can meet 0.8 f/IH≤1.3 < of conditional, wherein f
For total effective focal length of projection lens, IH is the half of image source region diagonal line length.More specifically, f and IH can further meet
0.87≤f/IH≤1.29.The total effective focal length and image height of reasonable disposition projection lens can effectively reduce distortion and promote mirror
The processing technology of head, while being conducive to be promoted the edge brightness of each lens, improve the image quality of projection lens.
In the exemplary embodiment, the projection lens of the application can meet 0.2 < EPD/IH < 0.7 of conditional, wherein
EPD is the Entry pupil diameters of projection lens, and IH is the half of image source region diagonal line length.More specifically, EPD and IH can further expire
Foot 0.35≤EPD/IH≤0.64.The Entry pupil diameters and image height of reasonable disposition projection lens, can efficiently control projection lens
Size, reduce the volume of projection lens, realize the miniaturization of projection lens.
In the exemplary embodiment, the projection lens of the application can meet 0.5 CT2/ET2≤1.6 < of conditional,
In, CT2 is the second lens in the center thickness on optical axis, and ET2 is edge thickness of second lens at maximum effective radius.More
Specifically, CT2 and ET2 can further meet 0.73≤CT2/ET2≤1.51.By the center and edge that control the second lens
Thickness can efficiently control light in the incident angle of the nearly image source side of the second lens, improve projection lens at image quality
Amount.
In the exemplary embodiment, the projection lens of the application can meet -1.9 < f/R2 < -1.3 of conditional, wherein
F is total effective focal length of projection lens, and R2 is the radius of curvature of the nearly image source side of the first lens.More specifically, f and R2 is into one
Step can meet -1.75≤f/R2≤- 1.36.By controlling total effective focal length of projection lens and the nearly image source side of the first lens
Radius of curvature, the off-axis aberration of rectifiable optical system, to effectively improve the image quality of projection lens.
In the exemplary embodiment, the projection lens of the application can meet 0.2 < DT11/DT31 < 0.5 of conditional,
In, DT11 is the nearly maximum effective radius at image side surface of the first lens, and DT31 is the nearly maximum at image side surface of the third lens
Effective radius.More specifically, DT11 and DT31 can further meet 0.26≤DT11/DT31≤0.39.By to the first lens
Configuration closely closely is optimized at the maximum effective radius of image side surface at image side surface and the third lens, projection lens can be efficiently controlled
Structure size, be conducive to camera lens group stand technique；Meanwhile the image quality of projection lens can be effectively improved.
In the exemplary embodiment, the projection lens of the application can meet 0.3 < CT2/T12 < 1.0 of conditional,
In, CT2 is the second lens in the center thickness on optical axis, and T12 is the spacing distance of the first lens and the second lens on optical axis.
More specifically, CT2 and T12 can further meet 0.36≤CT2/T12≤0.96.Meet 0.3 < CT2/T12 < 1.0 of conditional,
The overall length that lens system can effectively be shortened reduces the volume of camera lens, realizes camera lens miniaturization.
In the exemplary embodiment, the nearly image source side of the third lens can be convex surface.Further, the third lens is close
The radius of curvature R 6 of image source side and total effective focal length f of projection lens can meet -1.0 < f/R6 < 0.More specifically, f and R6
- 0.75≤f/R6 < 0 can further be met.The nearly image source side of the third lens is convex surface, is conducive to that light is allowed to keep uniform, nothing
Dark angle, and can preferably correct distortion.
In the exemplary embodiment, the nearly image source side of the third lens can be concave surface.By the nearly image source of the third lens
In the case of side arrangement is at concave surface, each parameter of camera lens is further adjusted, so that camera lens meets: -2.5 < f2/f3≤- 1.1,
In, f2 is the effective focal length of the second lens, and f3 is the effective focal length of the third lens；1.6 < R4/R3 < 2.5, wherein R4
The radius of curvature of the nearly image source side of two lens, R3 are the nearly radius of curvature at image side surface of the second lens；And 0.3 < CT2/
T12≤0.6, wherein CT2 is the second lens in the center thickness on optical axis, and T12 is the first lens and the second lens on optical axis
Spacing distance.More specifically, f2 and f3 can further meet -2.14≤f2/f3≤- 1.14；R4 and R3 can further meet
1.67≤R4/R3≤2.31；And CT2 and T12 can further meet 0.37≤CT2/T12≤0.59.Such configuration is advantageous
In the curvature of field of amendment projection lens, the image quality of projection lens is improved, and can effectively shorten the overall length of projection lens, increased
The field angle of big projection lens.
In the exemplary embodiment, above-mentioned projection lens may also include at least one diaphragm, to promote the imaging of camera lens
Quality.Optionally, diaphragm may be provided at between image side and the first lens.
Such as three pieces lens can be used according to the projection lens of the above embodiment of the application, pass through Rational choice lens
Material and each power of lens of reasonable distribution, face type, each lens center thickness and each lens between axis on spacing
Deng so that projection lens has the beneficial effects such as enough field angles, miniaturization.Projection lens through the above configuration can be used as
Interactive projection camera lens applied to infrared band uses.
In presently filed embodiment, each lens mostly use aspherical mirror.The characteristics of non-spherical lens, is: from lens
To lens perimeter, curvature is consecutive variations at center.With the spherical lens from lens centre to lens perimeter with constant curvature
Difference, non-spherical lens have more preferably radius of curvature characteristic, have the advantages that improve and distort aberration and improvement astigmatic image error.It adopts
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 solution the case where
Under, the lens numbers for constituting projection lens can be changed, to obtain each result and advantage described in this specification.Though for example,
It is so described by taking three lens as an example in embodiments, but the projection lens is not limited to include three lens.If
It needs, which may also include the lens of other quantity.
The specific embodiment for being applicable to the projection lens of above embodiment is further described with reference to the accompanying drawings.
Embodiment 1
Referring to Fig. 1 to Fig. 2 B description according to the projection lens of the embodiment of the present application 1.Fig. 1 is shown according to the application
The structural schematic diagram 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 side to image source side according to
Sequence includes: diaphragm STO, the first lens E1, the second lens E2 and the third lens E3.
First lens E1 has positive light coke, is closely concave surface at image side surface S1, nearly image source side S2 is convex surface；Second thoroughly
Mirror E2 has negative power, is closely concave surface at image side surface S3, nearly image source side S4 is convex surface；The third lens E3 has positive light focus
Degree is closely convex surface at image side surface S5, and nearly image source side S6 is convex surface.Light from image source S7 sequentially passes through each surface S6 to S1
And it is finally projected on the target object (not shown) in space.
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 radius of curvature and the unit of thickness are millimeter (mm).
Table 1
As shown in Table 1, the first lens E1 into the third lens E3 any one lens it is close at image side surface and nearly image source side
Face is aspherical.In the present embodiment, the face type x of each non-spherical lens is available but is not limited to following aspherical formula progress
It limits:
Wherein, x be it is aspherical along optical axis direction when being highly the position of h, away from aspheric vertex of surface apart from rise；C is
Aspherical paraxial curvature, c=1/R (that is, inverse that paraxial curvature c is upper 1 mean curvature radius R of table)；K be circular cone coefficient (
It has been provided in table 1)；Ai is the correction factor of aspherical i-th-th rank.The following table 2 give can be used for it is each aspherical in embodiment 1
The high-order coefficient A of mirror surface S1-S64、A6、A8、A10、A12、A14、A16And A18。
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 |
| S1 | -1.0029E+00 | 7.5884E+00 | -5.1243E+02 | 1.6780E+04 | -3.2312E+05 | 3.5420E+06 | -2.0327E+07 | 4.7272E+07 |
| S2 | -4.5135E-02 | 4.1888E-01 | -6.1162E+00 | 2.9685E+01 | -4.5099E+01 | 1.3997E+01 | 7.1587E+01 | |
| S3 | -6.6035E-01 | 4.3582E-01 | -1.5408E-01 | 2.1912E+01 | -2.4886E+01 | -7.0720E+01 | 1.0768E+02 | |
| S4 | -1.8261E-01 | -1.4631E-01 | 1.1810E+01 | -6.4205E+01 | 1.5793E+02 | -1.8472E+02 | 8.3896E+01 | |
| S5 | -4.9582E-02 | 3.5081E-01 | -5.0811E-01 | 8.4710E-01 | -1.5566E+00 | 1.4201E+00 | -4.9113E-01 | |
| S6 | 1.2371E-01 | -1.1124E+00 | 5.5058E+00 | -1.1090E+01 | 1.0953E+01 | -5.4017E+00 | 1.0649E+00 |
Table 2
Table 3 provides the effective focal length f1 to f3 of each lens in embodiment 1, total effective focal length f of projection lens and projection
The maximum angle of half field-of view HFOV of camera lens.
| f1(mm) | 1.26 | f(mm) | 1.11 |
| f2(mm) | -1.31 | HFOV(°) | 44.3 |
| f3(mm) | 1.01 |
Table 3
Projection lens in embodiment 1 meets:
F/f2=-0.85, wherein f is total effective focal length of projection lens, and f2 is the effective focal length of the second lens E2；
SAG22/SAG21=1.09, wherein the intersection point of nearly image source side S4 and optical axis that SAG22 is the second lens E2 are extremely
Distance on the axis on the effective radius vertex of the nearly image source side S4 of the second lens E2, SAG21 are the close at image side surface of the second lens E2
The intersection point of S3 and optical axis is to the second lens E2 closely at distance on the axis on the effective radius vertex of image side surface S3；
F1/f=1.14, wherein f1 is the effective focal length of the first lens E1, and f is total effective focal length of projection lens；
F2/f3=-1.30, wherein f2 is the effective focal length of the second lens E2, and f3 is the effective focal length of the third lens E3；
R4/R3=2.06, wherein R4 is the radius of curvature of the nearly image source side S4 of the second lens E2, and R3 is the second lens
The nearly radius of curvature at image side surface S3 of E2；
F/IH=1.08, wherein f is total effective focal length of projection lens, and IH is the half of image source region diagonal line length；
EPD/IH=0.51, wherein EPD is the Entry pupil diameters of projection lens, and IH is the half of image source region diagonal line length；
CT2/ET2=1.20, wherein CT2 is the second lens E2 in the center thickness on optical axis, and ET2 is the second lens E2
Edge thickness at maximum effective radius；
F/R2=-1.70, wherein f is total effective focal length of projection lens, and R2 is the nearly image source side S2 of the first lens E1
Radius of curvature；
DT11/DT31=0.31, wherein DT11 is the nearly maximum effective radius at image side surface S1 of the first lens E1,
DT31 is the nearly maximum effective radius at image side surface S5 of the third lens E3；
F/CT2=3.98, wherein f is total effective focal length of projection lens, and CT2 is the second lens E2 on optical axis
Heart thickness；
(N1+N2)/2=1.62, wherein N1 is the refractive index of the first lens E1, and N2 is the refractive index of the second lens E2；
CT2/T12=0.50, wherein CT2 is the second lens E2 in the center thickness on optical axis, and T12 is the first lens E1
With spacing distance of the second lens E2 on optical axis；
F/R6=-0.10, wherein f is total effective focal length of projection lens, and R6 is the nearly image source side S6 of the third lens E3
Radius of curvature.
Fig. 2A shows the distortion curve of the projection lens of embodiment 1, indicates distortion corresponding to different image source height
It is big a small amount of.Fig. 2 B shows the relative illumination curve of the projection lens of embodiment 1, indicates phase corresponding to different image source height
To illumination.A and Fig. 2 B is it is found that projection lens given by embodiment 1 can be realized good image quality according to fig. 2.
Embodiment 2
Referring to Fig. 3 to Fig. 4 B description according to the projection lens of 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 schematic diagram of shadow camera lens.
As shown in figure 3, according to the projection lens of the application illustrative embodiments along optical axis by image side to image source side according to
Sequence includes: diaphragm STO, the first lens E1, the second lens E2 and the third lens E3.
First lens E1 has positive light coke, is closely concave surface at image side surface S1, nearly image source side S2 is convex surface；Second thoroughly
Mirror E2 has negative power, is closely concave surface at image side surface S3, nearly image source side S4 is convex surface；The third lens E3 has positive light focus
Degree is closely convex surface at image side surface S5, and nearly image source side S6 is convex surface.Light from image source S7 sequentially passes through each surface S6 to S1
And it is finally projected on the target object (not shown) in space.
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 radius of curvature and the unit of thickness are millimeter (mm).
Table 4
As shown in Table 4, the first lens E1 into the third lens E3 any one lens it is close at image side surface and nearly image source side
Face is aspherical.Table 5 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 2, 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 | A18 |
| S1 | -6.1892E-01 | 1.2773E-01 | -1.2896E+02 | 5.1658E+03 | -1.0686E+05 | 1.1933E+06 | -6.8366E+06 | 1.5768E+07 |
| S2 | -8.3465E-02 | -2.2393E-01 | -4.2878E-01 | 1.8694E+01 | -1.3104E+02 | 4.1846E+02 | -4.9627E+02 | |
| S3 | 7.5799E-01 | -2.4309E+01 | 1.7488E+02 | -6.1961E+02 | 1.2502E+03 | -1.3664E+03 | 6.2507E+02 | |
| S4 | 5.2612E-01 | -6.1181E+00 | 2.2852E+01 | -3.1708E+01 | 5.2909E+00 | 2.8883E+01 | -2.1059E+01 | |
| S5 | 1.2037E-01 | -5.5864E-01 | 1.3404E+00 | -1.5354E+00 | 6.0539E-01 | 1.8385E-01 | -1.9403E-01 | |
| S6 | 7.4721E-01 | -3.1305E+00 | 6.8474E+00 | -8.4486E+00 | 5.7363E+00 | -2.0313E+00 | 2.9412E-01 |
Table 5
Table 6 provides the effective focal length f1 to f3 of each lens in embodiment 2, total effective focal length f of projection lens and projection
The maximum angle of half field-of view HFOV of camera lens.
| f1(mm) | 1.46 | f(mm) | 1.25 |
| f2(mm) | -1.17 | HFOV(°) | 39.0 |
| f3(mm) | 0.96 |
Table 6
Fig. 4 A shows the distortion curve of the projection lens of embodiment 2, indicates distortion corresponding to different image source height
It is big a small amount of.Fig. 4 B shows the relative illumination curve of the projection lens of embodiment 2, indicates phase corresponding to different image source height
To illumination.According to Fig. 4 A and Fig. 4 B it is found that projection lens given by embodiment 2 can be realized good image 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 schematic diagram.
As shown in figure 5, according to the projection lens of the application illustrative embodiments along optical axis by image side to image source side according to
Sequence includes: diaphragm STO, the first lens E1, the second lens E2 and the third lens E3.
First lens E1 has positive light coke, is closely concave surface at image side surface S1, nearly image source side S2 is convex surface；Second thoroughly
Mirror E2 has negative power, is closely concave surface at image side surface S3, nearly image source side S4 is convex surface；The third lens E3 has positive light focus
Degree is closely convex surface at image side surface S5, and nearly image source side S6 is convex surface.Light from image source S7 sequentially passes through each surface S6 to S1
And it is finally projected on the target object (not shown) in space.
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 radius of curvature and the unit of thickness are millimeter (mm).
Table 7
As shown in Table 7, the first lens E1 into the third lens E3 any one lens it is close at image side surface and nearly image source side
Face is aspherical.Table 8 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 3, 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 | A18 |
| S1 | -6.1980E-01 | 1.4829E+00 | -1.0886E+02 | 2.6894E+03 | -3.8088E+04 | 3.0423E+05 | -1.2765E+06 | 2.1924E+06 |
| S2 | -2.3028E-02 | -5.6488E-01 | 3.8560E+00 | -1.4708E+01 | 3.7359E+01 | -5.9567E+01 | 5.3357E+01 | |
| S3 | 2.8415E-01 | -1.5547E+01 | 1.0535E+02 | -3.1863E+02 | 5.2285E+02 | -4.5355E+02 | 1.6362E+02 | |
| S4 | 2.6411E-01 | -2.9520E+00 | 6.9629E+00 | 8.5614E+00 | -4.4627E+01 | 5.2762E+01 | -2.0821E+01 | |
| S5 | 1.2815E-01 | 5.5936E-02 | -1.7485E+00 | 5.7071E+00 | -8.7590E+00 | 6.6571E+00 | -2.0541E+00 | |
| S6 | 1.1895E+00 | -4.2513E+00 | 8.5299E+00 | -1.1025E+01 | 9.1752E+00 | -4.5261E+00 | 9.8100E-01 |
Table 8
Table 9 provides the effective focal length f1 to f3 of each lens in embodiment 3, total effective focal length f of projection lens and projection
The maximum angle of half field-of view HFOV of camera lens.
| f1(mm) | 1.38 | f(mm) | 1.18 |
| f2(mm) | -1.18 | HFOV(°) | 40.4 |
| f3(mm) | 0.92 |
Table 9
Fig. 6 A shows the distortion curve of the projection lens of embodiment 3, indicates distortion corresponding to different image source height
It is big a small amount of.Fig. 6 B shows the relative illumination curve of the projection lens of embodiment 3, indicates phase corresponding to different image source height
To illumination.According to Fig. 6 A and Fig. 6 B it is found that projection lens given by embodiment 3 can be realized good image 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 schematic diagram.
As shown in fig. 7, according to the projection lens of the application illustrative embodiments along optical axis by image side to image source side according to
Sequence includes: diaphragm STO, the first lens E1, the second lens E2 and the third lens E3.
First lens E1 has positive light coke, is closely convex surface at image side surface S1, nearly image source side S2 is convex surface；Second thoroughly
Mirror E2 has negative power, is closely concave surface at image side surface S3, nearly image source side S4 is convex surface；The third lens E3 has positive light focus
Degree is closely convex surface at image side surface S5, and nearly image source side S6 is concave surface.Light from image source S7 sequentially passes through each surface S6 to S1
And it is finally projected on the target object (not shown) in space.
Table 10 shows surface type, radius of curvature, thickness, material and the circle of each lens of the projection lens of embodiment 4
Bore coefficient, wherein radius of curvature and the unit of thickness are millimeter (mm).
Table 10
As shown in Table 10, the first lens E1 into the third lens E3 any one lens it is close at image side surface and nearly image source side
Face is aspherical.Table 11 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 4, wherein each aspherical
Face type can be limited by the formula (1) provided in above-described embodiment 1.
Table 11
Table 12 provides the effective focal length f1 to f3 of each lens in embodiment 4, total effective focal length f of projection lens and throwing
The maximum angle of half field-of view HFOV of shadow camera lens.
| f1(mm) | 1.50 | f(mm) | 1.33 |
| f2(mm) | -1.25 | HFOV(°) | 37.9 |
| f3(mm) | 1.05 |
Table 12
Fig. 8 A shows the distortion curve of the projection lens of embodiment 4, indicates distortion corresponding to different image source height
It is big a small amount of.Fig. 8 B shows the relative illumination curve of the projection lens of embodiment 4, indicates phase corresponding to different image source height
To illumination.According to Fig. 8 A and Fig. 8 B it is found that projection lens given by embodiment 4 can be realized good image 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 schematic diagram.
As shown in figure 9, according to the projection lens of the application illustrative embodiments along optical axis by image side to image source side according to
Sequence includes: diaphragm STO, the first lens E1, the second lens E2 and the third lens E3.
First lens E1 has positive light coke, is closely convex surface at image side surface S1, nearly image source side S2 is convex surface；Second thoroughly
Mirror E2 has negative power, is closely concave surface at image side surface S3, nearly image source side S4 is convex surface；The third lens E3 has positive light focus
Degree is closely convex surface at image side surface S5, and nearly image source side S6 is convex surface.Light from image source S7 sequentially passes through each surface S6 to S1
And it is finally projected on the target object (not shown) in space.
Table 13 shows surface type, radius of curvature, thickness, material and the circle of each lens of the projection lens of embodiment 5
Bore coefficient, wherein radius of curvature and the unit of thickness are millimeter (mm).
Table 13
As shown in Table 13, the first lens E1 into the third lens E3 any one lens it is close at image side surface and nearly image source side
Face is aspherical.Table 14 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 5, 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 | A18 |
| S1 | -5.5208E-01 | 1.0127E+01 | -4.5308E+02 | 1.1436E+04 | -1.7137E+05 | 1.5033E+06 | -7.1228E+06 | 1.3959E+07 |
| S2 | 1.3662E-02 | -5.7846E-02 | -2.8482E+00 | 4.4723E+01 | -2.1171E+02 | 4.8533E+02 | -4.5509E+02 | |
| S3 | 1.3256E+00 | -2.8217E+01 | 1.6643E+02 | -4.6981E+02 | 7.2979E+02 | -6.2046E+02 | 2.3818E+02 | |
| S4 | 7.7932E-01 | -8.6775E+00 | 3.2783E+01 | -6.7347E+01 | 9.9683E+01 | -1.0211E+02 | 4.8428E+01 | |
| S5 | 3.5960E-02 | 2.0474E-01 | -2.6623E+00 | 8.8113E+00 | -1.3954E+01 | 1.0923E+01 | -3.4544E+00 | |
| S6 | 2.0064E+00 | -8.5164E+00 | 1.9452E+01 | -2.7264E+01 | 2.3205E+01 | -1.1037E+01 | 2.2359E+00 |
Table 14
Table 15 provides the effective focal length f1 to f3 of each lens in embodiment 5, total effective focal length f of projection lens and throwing
The maximum angle of half field-of view HFOV of shadow camera lens.
| f1(mm) | 1.28 | f(mm) | 1.13 |
| f2(mm) | -1.01 | HFOV(°) | 41.8 |
| f3(mm) | 0.86 |
Table 15
Figure 10 A shows the distortion curve of the projection lens of embodiment 5, indicates distortion corresponding to different image source height
It is big a small amount of.Figure 10 B shows the relative illumination curve of the projection lens of embodiment 5, indicates corresponding to different image source height
Relative illumination.According to Figure 10 A and Figure 10 B it is found that projection lens given by embodiment 5 can be realized good image quality.
Embodiment 6
The projection lens according to the embodiment of the present application 6 is described referring to Figure 11 to Figure 12 B.Figure 11 is shown according to this
Apply for the structural schematic diagram of the projection lens of embodiment 6.
As shown in figure 11, according to the projection lens of the application illustrative embodiments along optical axis by image side to image source side according to
Sequence includes: diaphragm STO, the first lens E1, the second lens E2 and the third lens E3.
First lens E1 has positive light coke, is closely convex surface at image side surface S1, nearly image source side S2 is convex surface；Second thoroughly
Mirror E2 has negative power, is closely concave surface at image side surface S3, nearly image source side S4 is convex surface；The third lens E3 has positive light focus
Degree is closely convex surface at image side surface S5, and nearly image source side S6 is convex surface.Light from image source S7 sequentially passes through each surface S6 to S1
And it is finally projected on the target object (not shown) in space.
Table 16 shows surface type, radius of curvature, thickness, material and the circle of each lens of the projection lens of embodiment 6
Bore coefficient, wherein radius of curvature and the unit of thickness are millimeter (mm).
Table 16
As shown in Table 16, the first lens E1 into the third lens E3 any one lens it is close at image side surface and nearly image source side
Face is aspherical.Table 17 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 6, wherein each aspherical
Face type can be limited by the formula (1) provided in above-described embodiment 1.
Table 17
Table 18 provides the effective focal length f1 to f3 of each lens in embodiment 6, total effective focal length f of projection lens and throwing
The maximum angle of half field-of view HFOV of shadow camera lens.
| f1(mm) | 0.96 | f(mm) | 0.90 |
| f2(mm) | -0.54 | HFOV(°) | 48.6 |
| f3(mm) | 0.64 |
Table 18
Figure 12 A shows the distortion curve of the projection lens of embodiment 6, indicates distortion corresponding to different image source height
It is big a small amount of.Figure 12 B shows the relative illumination curve of the projection lens of embodiment 6, indicates corresponding to different image source height
Relative illumination.According to Figure 12 A and Figure 12 B it is found that projection lens given by embodiment 6 can be realized good image quality.
Embodiment 7
The projection lens according to the embodiment of the present application 7 is described referring to Figure 13 to Figure 14 B.Figure 13 is shown according to this
Apply for the structural schematic diagram of the projection lens of embodiment 7.
As shown in figure 13, according to the projection lens of the application illustrative embodiments along optical axis by image side to image source side according to
Sequence includes: diaphragm STO, the first lens E1, the second lens E2 and the third lens E3.
First lens E1 has positive light coke, is closely convex surface at image side surface S1, nearly image source side S2 is convex surface；Second thoroughly
Mirror E2 has negative power, is closely concave surface at image side surface S3, nearly image source side S4 is convex surface；The third lens E3 has positive light focus
Degree is closely convex surface at image side surface S5, and nearly image source side S6 is concave surface.Light from image source S7 sequentially passes through each surface S6 to S1
And it is finally projected on the target object (not shown) in space.
Table 19 shows surface type, radius of curvature, thickness, material and the circle of each lens of the projection lens of embodiment 7
Bore coefficient, wherein radius of curvature and the unit of thickness are millimeter (mm).
Table 19
As shown in Table 19, the first lens E1 into the third lens E3 any one lens it is close at image side surface and nearly image source side
Face is aspherical.Table 20 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 7, 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 | A18 |
| S1 | -5.2266E-01 | 7.4342E+00 | -3.7164E+02 | 1.0270E+04 | -1.6614E+05 | 1.5473E+06 | -7.6633E+06 | 1.5505E+07 |
| S2 | 1.0749E-02 | -1.3238E-01 | -3.9429E+00 | 6.3191E+01 | -3.1657E+02 | 7.7479E+02 | -7.8292E+02 | |
| S3 | 1.2437E+00 | -2.7953E+01 | 1.6585E+02 | -4.5832E+02 | 6.7705E+02 | -5.3369E+02 | 1.8986E+02 | |
| S4 | 7.6509E-01 | -8.7864E+00 | 3.4412E+01 | -7.5415E+01 | 1.2083E+02 | -1.3024E+02 | 6.3040E+01 | |
| S5 | -5.7171E-02 | 5.4036E-01 | -3.6128E+00 | 1.0641E+01 | -1.6327E+01 | 1.2736E+01 | -4.0621E+00 | |
| S6 | 1.8695E+00 | -8.0855E+00 | 1.8799E+01 | -2.6944E+01 | 2.3410E+01 | -1.1307E+01 | 2.3135E+00 |
Table 20
Table 21 provides the effective focal length f1 to f3 of each lens in embodiment 7, total effective focal length f of projection lens and throwing
The maximum angle of half field-of view HFOV of shadow camera lens.
| f1(mm) | 1.27 | f(mm) | 1.14 |
| f2(mm) | -1.00 | HFOV(°) | 41.2 |
| f3(mm) | 0.88 |
Table 21
Figure 14 A shows the distortion curve of the projection lens of embodiment 7, indicates distortion corresponding to different image source height
It is big a small amount of.Figure 14 B shows the relative illumination curve of the projection lens of embodiment 7, indicates corresponding to different image source height
Relative illumination.According to Figure 14 A and Figure 14 B it is found that projection lens given by embodiment 7 can be realized good image quality.
Embodiment 8
The projection lens according to the embodiment of the present application 8 is described referring to Figure 15 to Figure 16 B.Figure 15 is shown according to this
Apply for the structural schematic diagram of the projection lens of embodiment 8.
As shown in figure 15, according to the projection lens of the application illustrative embodiments along optical axis by image side to image source side according to
Sequence includes: diaphragm STO, the first lens E1, the second lens E2 and the third lens E3.
First lens E1 has positive light coke, is closely concave surface at image side surface S1, nearly image source side S2 is convex surface；Second thoroughly
Mirror E2 has negative power, is closely concave surface at image side surface S3, nearly image source side S4 is convex surface；The third lens E3 has positive light focus
Degree is closely convex surface at image side surface S5, and nearly image source side S6 is concave surface.Light from image source S7 sequentially passes through each surface S6 to S1
And it is finally projected on the target object (not shown) in space.
Table 22 shows surface type, radius of curvature, thickness, material and the circle of each lens of the projection lens of embodiment 8
Bore coefficient, wherein radius of curvature and the unit of thickness are millimeter (mm).
Table 22
As shown in Table 22, the first lens E1 into the third lens E3 any one lens it is close at image side surface and nearly image source side
Face is aspherical.Table 23 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 8, 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 | A18 |
| S1 | -6.0747E-01 | -5.0043E-01 | -4.8371E+01 | 1.4939E+03 | -2.3032E+04 | 1.8792E+05 | -7.8154E+05 | 1.3107E+06 |
| S2 | -3.9087E-02 | -6.9063E-01 | 4.9317E+00 | -2.1518E+01 | 6.3213E+01 | -1.1430E+02 | 1.0148E+02 | |
| S3 | 2.9803E-01 | -1.5924E+01 | 1.0714E+02 | -3.2092E+02 | 5.2005E+02 | -4.4487E+02 | 1.5828E+02 | |
| S4 | 2.8620E-01 | -3.4641E+00 | 9.5407E+00 | 1.9768E+00 | -3.4461E+01 | 4.3674E+01 | -1.7273E+01 | |
| S5 | 1.6749E-01 | -2.9402E-01 | -6.2753E-01 | 3.6972E+00 | -6.7088E+00 | 5.5537E+00 | -1.8178E+00 | |
| S6 | 1.2331E+00 | -4.7630E+00 | 9.8880E+00 | -1.2914E+01 | 1.0621E+01 | -5.0844E+00 | 1.0639E+00 |
Table 23
Table 24 provides the effective focal length f1 to f3 of each lens in embodiment 8, total effective focal length f of projection lens and throwing
The maximum angle of half field-of view HFOV of shadow camera lens.
| f1(mm) | 1.41 | f(mm) | 1.19 |
| f2(mm) | -1.20 | HFOV(°) | 40.0 |
| f3(mm) | 0.93 |
Table 24
Figure 16 A shows the distortion curve of the projection lens of embodiment 8, indicates distortion corresponding to different image source height
It is big a small amount of.Figure 16 B shows the relative illumination curve of the projection lens of embodiment 8, indicates corresponding to different image source height
Relative illumination.According to Figure 16 A and Figure 16 B it is found that projection lens given by embodiment 8 can be realized good image quality.
Embodiment 9
The projection lens according to the embodiment of the present application 9 is described referring to Figure 17 to Figure 18 B.Figure 17 shows according to this
Apply for the structural schematic diagram of the projection lens of embodiment 9.
As shown in figure 17, according to the projection lens of the application illustrative embodiments along optical axis by image side to image source side according to
Sequence includes: diaphragm STO, the first lens E1, the second lens E2 and the third lens E3.
First lens E1 has positive light coke, is closely concave surface at image side surface S1, nearly image source side S2 is convex surface；Second thoroughly
Mirror E2 has negative power, is closely concave surface at image side surface S3, nearly image source side S4 is convex surface；The third lens E3 has positive light focus
Degree is closely convex surface at image side surface S5, and nearly image source side S6 is convex surface.Light from image source S7 sequentially passes through each surface S6 to S1
And it is finally projected on the target object (not shown) in space.
Table 25 shows surface type, radius of curvature, thickness, material and the circle of each lens of the projection lens of embodiment 9
Bore coefficient, wherein radius of curvature and the unit of thickness are millimeter (mm).
Table 25
As shown in Table 25, the first lens E1 into the third lens E3 any one lens it is close at image side surface and nearly image source side
Face is aspherical.Table 26 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 9, 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 | A18 | A20 |
| S1 | -1.0755E+00 | 2.6961E+01 | -1.1840E+03 | 2.9490E+04 | -4.4202E+05 | 3.8523E+06 | -1.7093E+07 | 2.1367E+07 | 5.3098E+07 |
| S2 | 3.6296E-01 | -8.4545E+00 | 7.2369E+01 | -3.0870E+02 | 6.1282E+02 | -5.5383E+01 | -8.0025E+02 | ||
| S3 | 2.7379E+00 | -8.8848E+01 | 7.8062E+02 | -3.4706E+03 | 8.6617E+03 | -1.1428E+04 | 6.1686E+03 | ||
| S4 | -9.6767E-01 | 6.1297E+00 | -4.9050E+01 | 2.3495E+02 | -5.6186E+02 | 6.5619E+02 | -3.0070E+02 | ||
| S5 | -2.5717E-01 | 1.4933E+00 | -4.4257E+00 | 7.8461E+00 | -8.1728E+00 | 4.6833E+00 | -1.1668E+00 | ||
| S6 | -9.0794E-01 | 4.6693E+00 | -1.4584E+01 | 3.0858E+01 | -4.5254E+01 | 4.5812E+01 | -3.0320E+01 | 1.1597E+01 | -1.9194E+00 |
Table 26
Table 27 provides the effective focal length f1 to f3 of each lens in embodiment 9, total effective focal length f of projection lens and throwing
The maximum angle of half field-of view HFOV of shadow camera lens.
| f1(mm) | 1.17 | f(mm) | 1.03 |
| f2(mm) | -0.45 | HFOV(°) | 44.4 |
| f3(mm) | 0.56 |
Table 27
Figure 18 A shows the distortion curve of the projection lens of embodiment 9, indicates distortion corresponding to different image source height
It is big a small amount of.Figure 18 B shows the relative illumination curve of the projection lens of embodiment 9, indicates corresponding to different image source height
Relative illumination.According to Figure 18 A and Figure 18 B it is found that projection lens given by embodiment 9 can be realized good image quality.
Embodiment 10
The projection lens according to the embodiment of the present application 10 is described referring to Figure 19 to Figure 20 B.Figure 19 shows basis
The structural schematic diagram of the projection lens of the embodiment of the present application 10.
As shown in figure 19, according to the projection lens of the application illustrative embodiments along optical axis by image side to image source side according to
Sequence includes: diaphragm STO, the first lens E1, the second lens E2 and the third lens E3.
First lens E1 has positive light coke, is closely convex surface at image side surface S1, nearly image source side S2 is convex surface；Second thoroughly
Mirror E2 has negative power, is closely concave surface at image side surface S3, nearly image source side S4 is convex surface；The third lens E3 has positive light focus
Degree is closely convex surface at image side surface S5, and nearly image source side S6 is convex surface.Light from image source S7 sequentially passes through each surface S6 to S1
And it is finally projected on the target object (not shown) in space.
Table 28 shows surface type, radius of curvature, thickness, material and the circle of each lens of the projection lens of embodiment 10
Bore coefficient, wherein radius of curvature and the unit of thickness are millimeter (mm).
Table 28
As shown in Table 28, the first lens E1 into the third lens E3 any one lens it is close at image side surface and nearly image source side
Face is aspherical.Table 29 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 10, 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 | A18 |
| S1 | -5.4344E-01 | 7.5742E+00 | -2.9889E+02 | 6.4500E+03 | -8.3777E+04 | 6.4301E+05 | -2.6673E+06 | 4.5653E+06 |
| S2 | 4.6526E-02 | -1.0958E+00 | 8.4839E+00 | -3.0999E+01 | 6.6721E+01 | -6.9153E+01 | 2.5180E+01 | |
| S3 | 1.5132E+00 | -3.1597E+01 | 1.9594E+02 | -6.0648E+02 | 1.0601E+03 | -1.0123E+03 | 4.1764E+02 | |
| S4 | 6.9970E-01 | -7.8749E+00 | 2.7604E+01 | -4.3336E+01 | 3.8201E+01 | -2.4671E+01 | 1.0822E+01 | |
| S5 | 6.2514E-02 | 2.1155E-01 | -2.5123E+00 | 8.0403E+00 | -1.2398E+01 | 9.4769E+00 | -2.9318E+00 | |
| S6 | 1.8060E+00 | -7.1875E+00 | 1.5496E+01 | -2.0618E+01 | 1.6900E+01 | -7.9127E+00 | 1.6085E+00 |
Table 29
Table 30 provides the effective focal length f1 to f3 of each lens in embodiment 10, total effective focal length f of projection lens and throwing
The maximum angle of half field-of view HFOV of shadow camera lens.
| f1(mm) | 1.30 | f(mm) | 1.14 |
| f2(mm) | -1.02 | HFOV(°) | 41.4 |
| f3(mm) | 0.86 |
Table 30
Figure 20 A shows the distortion curve of the projection lens of embodiment 10, indicates abnormal corresponding to different image source height
Become larger a small amount of.Figure 20 B shows the relative illumination curve of the projection lens of embodiment 10, indicates corresponding to different image source height
Relative illumination.0A and Figure 20 B is it is found that projection lens given by embodiment 10 can be realized good imaging product according to fig. 2
Matter.
Embodiment 11
The projection lens according to the embodiment of the present application 11 is described referring to Figure 21 to Figure 22 B.Figure 21 shows basis
The structural schematic diagram of the projection lens of the embodiment of the present application 11.
As shown in figure 21, according to the projection lens of the application illustrative embodiments along optical axis by image side to image source side according to
Sequence includes: diaphragm STO, the first lens E1, the second lens E2 and the third lens E3.
First lens E1 has positive light coke, is closely convex surface at image side surface S1, nearly image source side S2 is convex surface；Second thoroughly
Mirror E2 has negative power, is closely concave surface at image side surface S3, nearly image source side S4 is convex surface；The third lens E3 has positive light focus
Degree is closely convex surface at image side surface S5, and nearly image source side S6 is convex surface.Light from image source S7 sequentially passes through each surface S6 to S1
And it is finally projected on the target object (not shown) in space.
Table 31 shows surface type, radius of curvature, thickness, material and the circle of each lens of the projection lens of embodiment 11
Bore coefficient, wherein radius of curvature and the unit of thickness are millimeter (mm).
Table 31
As shown in Table 31, the first lens E1 into the third lens E3 any one lens it is close at image side surface and nearly image source side
Face is aspherical.Table 32 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 11, 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 | A18 | A20 |
| S1 | -8.8314E-01 | 1.8219E+01 | -7.4187E+02 | 1.7436E+04 | -2.4724E+05 | 2.0042E+06 | -7.2245E+06 | -5.5607E+06 | 8.1994E+07 |
| S2 | 7.1464E-01 | -1.4348E+01 | 1.2796E+02 | -6.2258E+02 | 1.6805E+03 | -1.7857E+03 | 1.5959E+01 | ||
| S3 | 9.5571E-01 | -8.2607E+01 | 7.8834E+02 | -3.6311E+03 | 9.4202E+03 | -1.3034E+04 | 7.4211E+03 | ||
| S4 | -6.8603E-01 | 1.3984E+00 | -2.1628E+01 | 1.4623E+02 | -3.8954E+02 | 4.7110E+02 | -2.1718E+02 | ||
| S5 | -2.3562E-01 | 1.1386E+00 | -3.2020E+00 | 5.5612E+00 | -5.6798E+00 | 3.1762E+00 | -7.6310E-01 | ||
| S6 | -1.3424E+00 | 6.7464E+00 | -2.1432E+01 | 4.5723E+01 | -6.5670E+01 | 6.2628E+01 | -3.7783E+01 | 1.2940E+01 | -1.9056E+00 |
Table 32
Table 33 provides the effective focal length f1 to f3 of each lens in embodiment 11, total effective focal length f of projection lens and throwing
The maximum angle of half field-of view HFOV of shadow camera lens.
| f1(mm) | 1.12 | f(mm) | 0.99 |
| f2(mm) | -0.38 | HFOV(°) | 45.5 |
| f3(mm) | 0.51 |
Table 33
Figure 22 A shows the distortion curve of the projection lens of embodiment 11, indicates abnormal corresponding to different image source height
Become larger a small amount of.Figure 22 B shows the relative illumination curve of the projection lens of embodiment 11, indicates corresponding to different image source height
Relative illumination.2A and Figure 22 B is it is found that projection lens given by embodiment 11 can be realized good imaging product according to fig. 2
Matter.
Embodiment 12
The projection lens according to the embodiment of the present application 12 is described referring to Figure 23 to Figure 24 B.Figure 23 shows basis
The structural schematic diagram of the projection lens of the embodiment of the present application 12.
As shown in figure 23, according to the projection lens of the application illustrative embodiments along optical axis by image side to image source side according to
Sequence includes: diaphragm STO, the first lens E1, the second lens E2 and the third lens E3.
First lens E1 has positive light coke, is closely convex surface at image side surface S1, nearly image source side S2 is convex surface；Second thoroughly
Mirror E2 has negative power, is closely concave surface at image side surface S3, nearly image source side S4 is convex surface；The third lens E3 has positive light focus
Degree is closely convex surface at image side surface S5, and nearly image source side S6 is convex surface.Light from image source S7 sequentially passes through each surface S6 to S1
And it is finally projected on the target object (not shown) in space.
Table 34 shows surface type, radius of curvature, thickness, material and the circle of each lens of the projection lens of embodiment 12
Bore coefficient, wherein radius of curvature and the unit of thickness are millimeter (mm).
Table 34
As shown in Table 34, the first lens E1 into the third lens E3 any one lens it is close at image side surface and nearly image source side
Face is aspherical.Table 35 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 12, 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 | A18 |
| S1 | -5.2167E-01 | 5.0678E+00 | -2.8400E+02 | 8.5411E+03 | -1.5091E+05 | 1.5238E+06 | -8.0718E+06 | 1.7226E+07 |
| S2 | -8.8180E-03 | -2.4532E-01 | -4.3789E+00 | 7.6412E+01 | -4.0349E+02 | 1.0309E+03 | -1.1028E+03 | |
| S3 | 1.0661E+00 | -2.7126E+01 | 1.6279E+02 | -4.2768E+02 | 5.5568E+02 | -3.5831E+02 | 1.1639E+02 | |
| S4 | 6.9061E-01 | -9.0478E+00 | 3.8926E+01 | -9.5691E+01 | 1.7090E+02 | -1.9516E+02 | 9.6550E+01 | |
| S5 | -1.1867E-01 | 6.6280E-01 | -3.8916E+00 | 1.1429E+01 | -1.7810E+01 | 1.4136E+01 | -4.5763E+00 | |
| S6 | 1.8698E+00 | -8.5535E+00 | 2.0765E+01 | -3.0676E+01 | 2.7141E+01 | -1.3210E+01 | 2.7043E+00 |
Table 35
Table 36 provides the effective focal length f1 to f3 of each lens in embodiment 12, total effective focal length f of projection lens and throwing
The maximum angle of half field-of view HFOV of shadow camera lens.
| f1(mm) | 1.26 | f(mm) | 1.17 |
| f2(mm) | -0.98 | HFOV(°) | 40.7 |
| f3(mm) | 0.89 |
Table 36
Figure 24 A shows the distortion curve of the projection lens of embodiment 12, indicates abnormal corresponding to different image source height
Become larger a small amount of.Figure 24 B shows the relative illumination curve of the projection lens of embodiment 12, indicates corresponding to different image source height
Relative illumination.4A and Figure 24 B is it is found that projection lens given by embodiment 12 can be realized good imaging product according to fig. 2
Matter.
Embodiment 13
The projection lens according to the embodiment of the present application 13 is described referring to Figure 25 to Figure 26 B.Figure 25 shows basis
The structural schematic diagram of the projection lens of the embodiment of the present application 13.
As shown in figure 25, according to the projection lens of the application illustrative embodiments along optical axis by image side to image source side according to
Sequence includes: diaphragm STO, the first lens E1, the second lens E2 and the third lens E3.
First lens E1 has positive light coke, is closely concave surface at image side surface S1, nearly image source side S2 is convex surface；Second thoroughly
Mirror E2 has negative power, is closely concave surface at image side surface S3, nearly image source side S4 is convex surface；The third lens E3 has positive light focus
Degree is closely convex surface at image side surface S5, and nearly image source side S6 is concave surface.Light from image source S7 sequentially passes through each surface S6 to S1
And it is finally projected on the target object (not shown) in space.
Table 37 shows surface type, radius of curvature, thickness, material and the circle of each lens of the projection lens of embodiment 13
Bore coefficient, wherein radius of curvature and the unit of thickness are millimeter (mm).
Table 37
As shown in Table 37, the first lens E1 into the third lens E3 any one lens it is close at image side surface and nearly image source side
Face is aspherical.Table 38 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 13, 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 | A18 |
| S1 | -6.7529E-01 | -3.7121E+01 | 1.8238E+03 | -5.2071E+04 | 8.6224E+05 | -8.2354E+06 | 4.2107E+07 | -8.9066E+07 |
| S2 | -8.7509E-02 | 6.8589E-01 | -9.0612E+00 | 6.2604E+01 | -2.6460E+02 | 7.3642E+02 | -6.9510E+02 | |
| S3 | -1.0053E+00 | 4.0725E+00 | -1.5947E+01 | 6.9965E+01 | -1.4198E+02 | 1.2616E+02 | -3.9512E+01 | |
| S4 | -4.6059E-01 | 4.1497E+00 | -1.8898E+01 | 5.1774E+01 | -8.0318E+01 | 6.8366E+01 | -2.4489E+01 | |
| S5 | 6.6708E-01 | -2.2463E+00 | 4.6972E+00 | -5.9607E+00 | 4.2922E+00 | -1.4813E+00 | 1.2814E-01 | |
| S6 | 1.5560E-01 | -1.7301E+00 | 5.8220E+00 | -1.0342E+01 | 1.0507E+01 | -5.7168E+00 | 1.2689E+00 |
Table 38
Table 39 provides the effective focal length f1 to f3 of each lens in embodiment 13, total effective focal length f of projection lens and throwing
The maximum angle of half field-of view HFOV of shadow camera lens.
| f1(mm) | 1.34 | f(mm) | 1.15 |
| f2(mm) | -3.78 | HFOV(°) | 44.2 |
| f3(mm) | 1.77 |
Table 39
Figure 26 A shows the distortion curve of the projection lens of embodiment 13, indicates abnormal corresponding to different image source height
Become larger a small amount of.Figure 26 B shows the relative illumination curve of the projection lens of embodiment 13, indicates corresponding to different image source height
Relative illumination.6A and Figure 26 B is it is found that projection lens given by embodiment 13 can be realized good imaging product according to fig. 2
Matter.
To sum up, embodiment 1 to embodiment 13 meets relationship shown in table 40 respectively.
| Conditional embodiment | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| f/f2 | -0.85 | -1.07 | -0.99 | -1.06 | -1.11 | -1.67 | -1.14 |
| SAG22/SAG21 | 1.09 | 1.01 | 1.01 | 1.00 | 1.04 | 1.07 | 1.04 |
| f1/f | 1.14 | 1.17 | 1.17 | 1.13 | 1.13 | 1.07 | 1.11 |
| f2/f3 | -1.30 | -1.22 | -1.28 | -1.19 | -1.17 | -0.84 | -1.14 |
| R4/R3 | 2.06 | 2.07 | 2.08 | 2.04 | 2.28 | 3.75 | 2.31 |
| f/IH | 1.08 | 1.22 | 1.14 | 1.29 | 1.09 | 0.87 | 1.11 |
| EPD/IH | 0.51 | 0.54 | 0.62 | 0.61 | 0.43 | 0.46 | 0.39 |
| CT2/ET2 | 1.20 | 1.03 | 1.03 | 1.01 | 1.09 | 1.12 | 1.07 |
| f/R2 | -1.70 | -1.60 | -1.50 | -1.36 | -1.43 | -1.75 | -1.46 |
| DT11/DT31 | 0.31 | 0.33 | 0.38 | 0.37 | 0.29 | 0.30 | 0.27 |
| f/CT2 | 3.98 | 5.26 | 4.94 | 5.33 | 4.45 | 3.08 | 4.41 |
| (N1+N2)/2 | 1.62 | 1.62 | 1.63 | 1.62 | 1.62 | 1.53 | 1.62 |
| CT2/T12 | 0.50 | 0.36 | 0.37 | 0.43 | 0.51 | 0.96 | 0.53 |
| f/R6 | -0.10 | -0.002 | 0.00 | 0.57 | -0.06 | -0.54 | 0.01 |
| Conditional embodiment | 8 | 9 | 10 | 11 | 12 | 13 |
| f/f2 | -1.00 | -2.28 | -1.12 | -2.64 | -1.19 | -0.30 |
| SAG22/SAG21 | 1.01 | 0.89 | 1.02 | 0.87 | 1.02 | 1.24 |
| f1/f | 1.18 | 1.14 | 1.14 | 1.13 | 1.08 | 1.16 |
| f2/f3 | -1.28 | -0.80 | -1.18 | -0.73 | -1.11 | -2.14 |
| R4/R3 | 2.08 | 4.25 | 2.25 | 4.86 | 2.35 | 1.67 |
| f/IH | 1.16 | 1.00 | 1.11 | 0.96 | 1.13 | 1.12 |
| EPD/IH | 0.64 | 0.54 | 0.55 | 0.51 | 0.35 | 0.54 |
| CT2/ET2 | 1.03 | 0.76 | 1.05 | 0.73 | 1.03 | 1.51 |
| f/R2 | -1.51 | -1.68 | -1.42 | -1.66 | -1.49 | -1.75 |
| DT11/DT31 | 0.39 | 0.33 | 0.35 | 0.31 | 0.26 | 0.33 |
| f/CT2 | 5.00 | 5.21 | 4.68 | 5.27 | 4.42 | 3.29 |
| (N1+N2)/2 | 1.63 | 1.53 | 1.62 | 1.53 | 1.62 | 1.62 |
| CT2/T12 | 0.37 | 0.48 | 0.47 | 0.49 | 0.53 | 0.59 |
| f/R6 | 0.04 | -0.74 | -0.01 | -0.75 | -0.001 | 0.73 |
Table 40
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art
Member is it should be appreciated that invention scope involved in the application, however it is not limited to technology made of the specific combination of above-mentioned technical characteristic
Scheme, while should also cover in the case where not departing from the inventive concept, it is carried out by above-mentioned technical characteristic or its equivalent feature
Any combination and the other technical solutions formed.Such as features described above has similar function with (but being not limited to) disclosed herein
Can technical characteristic replaced mutually and the technical solution that is formed.
Claims (34)
1. projection lens, along optical axis by sequentially including: the first lens, the second lens and the third lens at image side to image source side,
It is characterized in that,
First lens have positive light coke；
Second lens have negative power, are closely concave surface at image side surface, nearly image source side is convex surface；
The third lens have positive light coke, are closely convex surface at image side surface；
Total effective focal length f of the projection lens and second lens meet 3.0 in the center thickness CT2 on the optical axis≤
F/CT2 < 5.5.
2. projection lens according to claim 1, which is characterized in that second lens are thick in the center on the optical axis
It spends the edge thickness ET2 of CT2 and second lens at maximum effective radius and meets 0.5 CT2/ET2≤1.6 <.
3. projection lens according to claim 1, which is characterized in that second lens are thick in the center on the optical axis
It spends the spacing distance T12 of CT2 and first lens and second lens on the optical axis and meets 0.3 < CT2/T12 <
1.0。
4. projection lens according to claim 1, which is characterized in that the effective focal length f1 of first lens and the throwing
Total effective focal length f of shadow camera lens meets 1.0 < f1/f < 1.3.
5. projection lens according to claim 1, which is characterized in that total effective focal length f of the projection lens with it is described
The effective focal length f2 of second lens meets -3.0 < f/f2 < 0.
6. projection lens according to claim 1, which is characterized in that the effective focal length f2 of second lens and described the
The effective focal length f3 of three lens meets -2.5 < f2/f3 < -0.5.
7. projection lens according to claim 5, which is characterized in that the curvature of the nearly image source side of second lens half
The nearly radius of curvature R 3 at image side surface of diameter R4 and second lens meets 1.5 < R4/R3 < 5.0.
8. projection lens according to claim 4, which is characterized in that total effective focal length f of the projection lens with it is described
The radius of curvature R 2 of the nearly image source side of first lens meets -1.9 < f/R2 < -1.3.
9. projection lens according to claim 1, which is characterized in that the nearly image source side of second lens and the light
The intersection point of axis is to distance SAG22 of the effective radius vertex on the optical axis of the nearly image source side of second lens and described the
Two lens it is close at the intersection point of image side surface and the optical axis to second lens closely at the effective radius vertex of image side surface in institute
The distance SAG21 stated on optical axis meets 0.8 < SAG22/SAG21 < 1.3.
10. projection lens according to claim 1, which is characterized in that the refractive index N1 of first lens and described the
The refractive index N2 of two lens meets (N1+N2)/2≤1.63.
11. projection lens according to claim 1, which is characterized in that the Entry pupil diameters EPD of the projection lens with it is described
The half IH of the image source region diagonal line length of projection lens meets 0.2 < EPD/IH < 0.7.
12. projection lens according to claim 11, which is characterized in that total effective focal length f of the projection lens and institute
The half IH for stating the image source region diagonal line length of projection lens meets 0.8 f/IH≤1.3 <.
13. projection lens according to claim 1, which is characterized in that the nearly maximum at image side surface of first lens
Effective radius DT11 and the nearly maximum effective radius DT31 at image side surface of the third lens meet 0.2 < DT11/DT31 <
0.5。
14. projection lens according to any one of claim 1 to 13, which is characterized in that the nearly picture of the third lens
Source is convex surface；
The radius of curvature R 6 of the nearly image source side of the total effective focal length f and the third lens of the projection lens meets -1.0 <
F/R6 < 0.
15. projection lens according to any one of claim 1 to 13, which is characterized in that the nearly picture of the third lens
Source is concave surface；
The effective focal length f2 of second lens and the effective focal length f3 of the third lens meet -2.5 < f2/f3≤- 1.1.
16. projection lens according to claim 15, which is characterized in that the curvature of the nearly image source side of second lens
The nearly radius of curvature R 3 at image side surface of radius R4 and second lens meets 1.6 < R4/R3 < 2.5.
17. projection lens according to claim 16, which is characterized in that second lens are in the center on the optical axis
The spacing distance T12 of thickness CT2 and first lens and second lens on the optical axis meets 0.3 < CT2/T12
≤0.6。
18. projection lens, along optical axis by sequentially including: the first lens, the second lens and the third lens at image side to image source side,
It is characterized in that,
First lens have positive light coke；
Second lens have negative power, are closely concave surface at image side surface, nearly image source side is convex surface；
The third lens have positive light coke, are closely convex surface at image side surface；
The effective focal length f2 of second lens and the effective focal length f3 of the third lens meet -2.5 < f2/f3 < -0.5.
19. projection lens according to claim 18, which is characterized in that total effective focal length f of the projection lens and institute
The effective focal length f2 for stating the second lens meets -3.0 < f/f2 < 0.
20. projection lens according to claim 18, which is characterized in that the nearly image source side of second lens and described
The intersection point of optical axis to the nearly image source side of second lens distance SAG22 of the effective radius vertex on the optical axis with it is described
The close of second lens closely exists at the effective radius vertex of image side surface at the intersection point of image side surface and the optical axis to second lens
Distance SAG21 on the optical axis meets 0.8 < SAG22/SAG21 < 1.3.
21. projection lens according to claim 18, which is characterized in that second lens are in the center on the optical axis
The edge thickness ET2 of thickness CT2 and second lens at maximum effective radius meets 0.5 CT2/ET2≤1.6 <.
22. projection lens according to claim 18, which is characterized in that the curvature of the nearly image source side of second lens
The nearly radius of curvature R 3 at image side surface of radius R4 and second lens meets 1.5 < R4/R3 < 5.0.
23. projection lens according to claim 18, which is characterized in that the effective focal length f1 of first lens with it is described
Total effective focal length f of projection lens meets 1.0 < f1/f < 1.3.
24. projection lens according to claim 18, which is characterized in that total effective focal length f of the projection lens and institute
The radius of curvature R 2 for stating the nearly image source side of the first lens meets -1.9 < f/R2 < -1.3.
25. projection lens according to claim 18, which is characterized in that the Entry pupil diameters EPD of the projection lens and institute
The half IH for stating the image source region diagonal line length of projection lens meets 0.2 < EPD/IH < 0.7.
26. projection lens according to claim 18, which is characterized in that total effective focal length f of the projection lens and institute
The half IH for stating the image source region diagonal line length of projection lens meets 0.8 f/IH≤1.3 <.
27. projection lens according to claim 18, which is characterized in that the nearly maximum at image side surface of first lens
Effective radius DT11 and the nearly maximum effective radius DT31 at image side surface of the third lens meet 0.2 < DT11/DT31 <
0.5。
28. projection lens according to claim 21, which is characterized in that total effective focal length f of the projection lens and institute
It states the second lens and meets 3.0≤f/CT2 < 5.5 in the center thickness CT2 on optical axis.
29. projection lens according to claim 21, which is characterized in that second lens are in the center on the optical axis
The spacing distance T12 of thickness CT2 and first lens and second lens on the optical axis meets 0.3 < CT2/T12
< 1.0.
30. projection lens according to claim 18, which is characterized in that the refractive index N1 of first lens and described the
The refractive index N2 of two lens meets (N1+N2)/2≤1.63.
31. projection lens described in any one of 8 to 30 according to claim 1, which is characterized in that the nearly picture of the third lens
Source is convex surface；
The radius of curvature R 6 of the nearly image source side of the total effective focal length f and the third lens of the projection lens meets -1.0 <
F/R6 < 0.
32. projection lens described in any one of 8 to 30 according to claim 1, which is characterized in that the nearly picture of the third lens
Source is concave surface；
The effective focal length f2 of second lens and the effective focal length f3 of the third lens meet -2.5 < f2/f3≤- 1.1.
33. projection lens according to claim 32, which is characterized in that the curvature of the nearly image source side of second lens
The nearly radius of curvature R 3 at image side surface of radius R4 and second lens meets 1.6 < R4/R3 < 2.5.
34. projection lens according to claim 33, which is characterized in that second lens are in the center on the optical axis
The spacing distance T12 of thickness CT2 and first lens and second lens on the optical axis meets 0.3 < CT2/T12
≤0.6。
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108427183A (en) * | 2018-05-04 | 2018-08-21 | 浙江舜宇光学有限公司 | Projection lens |
| CN114924393A (en) * | 2022-05-13 | 2022-08-19 | 深圳市汇顶科技股份有限公司 | Infrared projection lens |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108427183A (en) * | 2018-05-04 | 2018-08-21 | 浙江舜宇光学有限公司 | Projection lens |
| WO2019210736A1 (en) * | 2018-05-04 | 2019-11-07 | 浙江舜宇光学有限公司 | Projection lens |
| CN114924393A (en) * | 2022-05-13 | 2022-08-19 | 深圳市汇顶科技股份有限公司 | Infrared projection lens |
| CN114924393B (en) * | 2022-05-13 | 2024-01-26 | 深圳市汇顶科技股份有限公司 | Infrared projection lens |
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