CN207764539U - Projection lens - Google Patents
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- CN207764539U CN207764539U CN201820213319.6U CN201820213319U CN207764539U CN 207764539 U CN207764539 U CN 207764539U CN 201820213319 U CN201820213319 U CN 201820213319U CN 207764539 U CN207764539 U CN 207764539U
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Abstract
This application discloses a kind of projection lens, which extremely includes sequentially at image side by image source side along optical axis：The first lens with focal power and the second lens.First lens include the first flat glass being arranged between the image source side surface and the image side surfaces of the first lens of the first lens；Second lens include the second flat glass being arranged between the image source side surface and the image side surfaces of the second lens of the second lens.
Description
Technical field
This application involves a kind of projection lens, more specifically, this application involves it is a kind of include two lens projection lens.
Background technology
In recent years, being constantly progressive with science and technology, interactive device gradually rises, and the application range of projection lens is also increasingly
Extensively.Nowadays, chip technology is quickly grown with intelligent algorithm, is projected image to space object using optical projection lens and is received and is somebody's turn to do
Picture signal, you can calculate the 3-D view with object space depth information.The specific method is as follows：Utilize optical projection mirror
The light that head sends out infra-red laser diode (LD) or vertical cavity surface emitting laser (VCSEL) is projected to target object direction；
Projected light beam is realizing redistribution of the projected image on target object after diffractive-optical element (DOE)；Utilize camera shooting
Camera lens is projected onto the reception of the image on object, you can calculates comprising the 3-D view for being projected object space depth information.
3-D view with depth information can be further used for a variety of good application exploitations such as bio-identification.
In general, the projection lens for being conventionally used to imaging eliminates various aberrations simultaneously by using the mode for increasing lens numbers
Improve resolution ratio.But the optics total length (TTL) of projection lens can be caused to increase in this way, and lens assembling needs lens barrel etc.
Supports so that the overall volume of camera lens is larger, is unfavorable for the miniaturization of camera lens.In addition, traditional lens construction can not
Realize the non-boundary arrangement between each camera lens in array lens.
Utility model content
This application provides be applicable to portable electronic product, can at least solve or part solve it is in the prior art
The projection lens of above-mentioned at least one disadvantage.
On the one hand, this application provides such a projection lens, and the projection lens is along optical axis by image source side to imaging
Side sequentially may include：The first lens with focal power and the second lens.First lens may include that the picture in the first lens is arranged
The first flat glass between source surface and the image side surfaces of the first lens；Second lens may include being arranged in the second lens
Image source side surface and the image side surfaces of the second lens between the second flat glass.
In one embodiment, the thickness CT1p of the first flat glass and the first lens are in the center thickness on optical axis
CT1 can meet 0.1 ＜ CT1p/CT1 ＜ 0.5.
In one embodiment, the thickness CT2p of the second flat glass and the second lens are in the center thickness on optical axis
CT2 can meet 0.1 ＜ CT2p/CT2 ＜ 0.5.
In one embodiment, the first lens on optical axis center thickness CT1 and the second lens on optical axis
Heart thickness CT2 can meet 0.6 ＜ CT1/CT2 ＜ 1.4.
In one embodiment, the first lens and the second lens can have positive light coke.
In one embodiment, total effective focal length f of the effective focal length f2 of the second lens and projection lens can meet 0.6
＜ f2/f ＜ 1.6.
In one embodiment, the image source side surface of the second lens can be concave surface, and image side surfaces can be convex surface；Second
The radius of curvature R 4 of the image side surfaces of lens can meet -0.5 ＜ R4/f ＜ -0.1 with total effective focal length f of projection lens.
In one embodiment, the imaging of maximum half bore DT1f and the second lens of the image source side surface of the first lens
Maximum half bore DT2r of side surface can meet 0.8 ＜ DT1f/DT2r ＜ 1.2.
In one embodiment, the maximum angle of half field-of view HFOV of projection lens can meet tan (HFOV) ＜ 0.26.
In one embodiment, the object-side numerical aperture NA of projection lens can meet NA ＞ 0.18.
In one embodiment, most shortwave of the minimal wave length of the practical application wavelength X of projection lens than using light source
Length 0nm-100nm, the longest wavelength of the practical application wavelength X of projection lens is than using the longest wavelength of light source long 0nm-
100nm。
In one embodiment, the maximum incident angle degree CRAmax of the chief ray of projection lens can meet CRAmax ＜
10°。
On the other hand, this application provides a kind of projection lens, by the optic alignment heap poststack of multiple arrangements, cutting
At containing there are one the lens array of camera lens or a plurality of lenses, and the edge shape of the lens array can be round, rectangle or more
Side shape.
Another aspect, present invention also provides a kind of method of manufacture projecting lens, this method includes：In the opposite of base material
One or both sides in both sides, by curing a certain number of plastic bodies or by suppressing the base material so that in the base material
Opposite sides outer surface on form multiple parts with curvature, to form lens array；And the cutting lens
Array, it includes at least one part with curvature each of to make to be cut into part, and each portion being cut into
Divide with round, rectangle or polygon edge shape.
In one embodiment, the base material is flat glass.
The application uses multiple (for example, two) lens, by the way that flat glass is arranged in each lens and rationally divides
With each power of lens, face type, each lens center thickness and each lens between axis on spacing etc. so that above-mentioned projection
Camera lens has the advantageous effects such as miniaturization, high image quality.Meanwhile the camera lens of above-mentioned configuration constitutes few boundary even null boundary
Array lens.
Description of the drawings
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. 2 shows the distortion curves 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 shows the distortion 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 shows the distortion 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 shows the distortion 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 shows the distortion 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 shows the distortion 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 shows the distortion 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 shows the distortion curve of the projection lens of embodiment 8；
Figure 17 shows the sectional views according to the projection lens of the application embodiment；
Figure 18 shows the stereogram of lens arrays according to the application embodiment, containing multiple lens units；
Figure 19 shows the front view of Figure 18；
Figure 20 shows the main view of lens arrays according to the application another embodiment, containing multiple lens units
Figure；
Figure 21 shows the main view of lens arrays according to the application another embodiment, containing multiple lens units
Figure；
Figure 22 shows the lens array for including a camera lens, and the edge shape of the lens array is pentagon；
Figure 23 shows the lens array for including a camera lens, and the edge shape of the lens array is hexagon；
Figure 24 shows the lens array for including a camera lens, and the edge shape of the lens array is circle；
Figure 25 shows the lens array including a plurality of lenses, and the edge shape of the lens array is circle；
Figure 26 shows the lens array for including a camera lens, and the edge shape of the lens array is rectangle；
Figure 27 shows the lens array including a plurality of lenses, and the edge shape of the lens array is rectangle.
Specific implementation mode
Refer to the attached drawing is made more detailed description by the application in order to better understand to the various aspects of the application.It answers
Understand, the description of the only illustrative embodiments to 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.It includes associated institute to state "and/or"
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, and does not indicate that 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 convenience 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.It is known as image source near the surface of image source side in each lens
Side surface is known as image side surfaces in each lens near 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 being used in bright book, but does not preclude the presence or addition of one or more
Other feature, component, assembly unit and/or combination thereof.In addition, ought the statement of such as at least one of " ... " appear in institute
When after the list of row 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 the meaning consistent with their meanings 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.
It may include that such as two (group) has the lens of focal power according to the projection lens of the application illustrative embodiments,
That is, the first lens and the second lens.The two lens are along optical axis by image source side at image side sequential.
In the exemplary embodiment, the first lens may include being arranged between its image source side surface and image side surfaces
First lens are divided into close to the first image source side section of image source side and close at image side by the first flat glass, the first flat glass
First imaging side section.Second lens may include the second plane glass being arranged between its image source side surface and image side surfaces
Second lens are divided into close to the second image source side section of image source side and close to the second imaging at image side by glass, the second flat glass
Side section.Flat glass is both provided between the image source side surface of each lens and image side surfaces, such arrangement is advantageous
Different number and array of different shapes are realized in support lens, are conducive to that lens is avoided to cause because of radius of curvature the reason of
Flexural deformation or contraction distortion；Meanwhile flat glass is advantageously implemented stacking and optical alignment, and heap poststack does not need mirror
The conventional junctions components such as cylinder, are advantageously implemented the miniaturization of camera lens module.
In the exemplary embodiment, the first lens and the second lens can have positive light coke.Such arrangement is advantageous
In the chief ray angle for reducing image source side, the matching of camera lens and light emitting source cone angle is improved, the brightness uniformity of projected image is improved
Property.
In the exemplary embodiment, the projection lens of the application can meet conditional tan (HFOV) ＜ 0.26, wherein
HFOV is the maximum angle of half field-of view of projection lens.More specifically, HFOV can further meet tan (HFOV) ＜ 0.20, for example,
0.14≤tan(HFOV)≤0.18.Meet conditional tan (HFOV) ＜ 0.26, be conducive to reduce the projected light beam angle of divergence and increase
Add the projection depth of field；Be conducive to projection lens and tend to be flat at depth of field face before and after image side；Algorithm process is also helped, to obtain more
Accurate depth information.
In the exemplary embodiment, the projection lens of the application can meet 0.6 ＜ CT1/CT2 ＜ 1.4 of conditional,
In, CT1 be the first lens in the center thickness on optical axis (that is, the center of the first lens image source side surface is to the first lens imaging
Spacing distance of the center of side surface on optical axis), CT2 is for the second lens in the center thickness on optical axis (that is, the second lens picture
Spacing distance of the center of the center on source surface to the second lens imaging side surface on optical axis).More specifically, CT1 and CT2
0.69≤CT1/CT2≤1.33 can further be met.Meet 0.6 ＜ CT1/CT2 ＜ 1.4 of conditional, is conducive to reasonable distribution axis
The miniaturization of camera lens is realized in upper space；Meanwhile being conducive to lens and realizing stacking and optical alignment.
In the exemplary embodiment, the projection lens of the application can meet 0.6 ＜ f2/f ＜ 1.6 of conditional, 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 0.69≤
f2/f≤1.50.Meet 0.6 ＜ f2/f ＜ 1.6 of conditional, is conducive to optics total length (TTL) and the projection of reduced projection camera lens
The ratio of total effective focal length f of camera lens realizes the miniaturization of camera lens module；Meanwhile being conducive to reduce the projected light beam angle of divergence simultaneously
Increase the projection depth of field, there is preferable projection imaging quality.
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 0.20≤NA≤0.21.Meet conditional NA ＞ 0.18,
Projection lens has larger numerical aperture, and the light source for being conducive to increase camera lens receives ability, improves projection energy efficiency, to
Obtain the projected image of more high brightness.
In the exemplary embodiment, the projection lens of the application can meet 0.1 ＜ CT1p/CT1 ＜ 0.5 of conditional,
In, CT1p be the first flat glass thickness (that is, the image source side surface of the first flat glass to the first flat glass at image side
Spacing distance of the surface on optical axis), CT1 is the first lens in the center thickness on optical axis.More specifically, CT1p and CT1 into
One step can meet 0.15 ＜ CT1p/CT1 ＜ 0.35, for example, 0.17≤CT1p/CT1≤0.31.Meet 0.1 ＜ CT1p/ of conditional
CT1 ＜ 0.5 are conducive to the radius of curvature of reasonable layout the first lens image source side surface and image side surfaces, to control edge-light
The distribution of line；Meanwhile being conducive to preferably balance the anufacturability of the radius of curvature and the first lens on each surface of the first lens.
In the exemplary embodiment, the projection lens of the application can meet 0.1 ＜ CT2p/CT2 ＜ 0.5 of conditional,
In, CT2p be the second flat glass thickness (that is, the image source side surface of the second flat glass to the second flat glass at image side
Spacing distance of the surface on optical axis), CT2 is the second lens in the center thickness on optical axis.More specifically, CT2p and CT2 into
One step can meet 0.15 ＜ CT2p/CT2 ＜ 0.30, for example, 0.17≤CT2p/CT2≤0.24.Meet 0.1 ＜ CT2p/ of conditional
CT2 ＜ 0.5 are conducive to the radius of curvature of reasonable layout the second lens image source side surface and image side surfaces, to control edge-light
The distribution of line；Meanwhile being conducive to preferably balance the anufacturability of the radius of curvature and the second lens on each surface of the second lens.
Second lens can be convex surface facing the meniscus shaped lens at image side, and image source side surface is concave surface, image side surfaces
For convex surface.In the exemplary embodiment, the projection lens of the application can meet -0.5 ＜ R4/f ＜ -0.1 of conditional, 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 is into one
Step can meet -0.4 ＜ -0.2 ＜ R4/f, for example, -0.31≤R4/f≤- 0.23.Meet -0.5 ＜ -0.1 ＜ R4/f of conditional,
Be conducive to reduce spherical aberration and astigmatism, improve the image quality of projection lens；Meanwhile being conducive to correct introduced by the first lens
Distortion.
In the exemplary embodiment, the projection lens of the application can meet 0.8 ＜ DT1f/DT2r ＜ 1.2 of conditional,
In, DT1f is maximum half bore of the image source side surface of the first lens, and DT2r is maximum half of the image side surfaces of the second lens
Bore.More specifically, DT1f and DT2r can further meet 0.82≤DT1f/DT2r≤1.09.Meet 0.8 ＜ of conditional
DT1f/DT2r ＜ 1.2 are conducive to the reasonable distribution of focal power；Be conducive to improve lens can processing technology；Be conducive to balance
The tolerance sensitivity of optical system.
In the exemplary embodiment, the projection lens of the application can meet 10 ° of conditional CRAmax ＜, wherein
CRAmax is the maximum incident angle degree of the chief ray of projection lens.Meet 10 ° of conditional CRAmax ＜, is conducive to preferably match
The outer radiant light cone angle of axis increases the outer light-inletting quantity of axis of optical system, improves the brightness of projected image.
The wave band of above-mentioned projection lens application can be monochromatic source, and the practical application wavelength X of projection lens is most short
Wavelength is shorter 0nm-100nm than the minimal wave length of used monochromatic source, the longest wavelength of the practical application wavelength X of projection lens
It is longer 0nm-100nm than the longest wavelength of used monochromatic source.It is advantageously reduced due to wide wavelength and is drawn using monochromatic source
Aberration, stray light for entering etc. are conducive to the image quality for improving projection lens；Meanwhile projection lens may make to meet optics and spread out
Penetrate the matched demand of fiber interface of element DOE.Optionally, above-mentioned projection lens can be applied to infrared unicast long-wave band.
Figure 17 shows the sectional views according to the projection lens of the application embodiment.As shown in figure 17, according to the application
Projection lens can by certain amount arrange optic alignment stack.Projection lens may include the first lens E1 and
Two lens E2.It is first that first lens E1, which can have the first flat glass E1p, the first flat glass E1p to divide the first lens E1,
The imaging side sections of image source side section E1f and first E1r.Second lens E2 can have the second flat glass E2p, the second flat glass
E2 points by the second lens of E2p is the imaging side sections of the second image source side section E2f and second E2r.
As shown in figure 17, the first lens E1 and the second lens E2 can be using flat glass as base material respectively, and both sides are uniform
The both sides adhered to a certain number of hardened plastic materials and formed carry spherical surface or aspherical overall lens.Optionally, first
Lens E1 and the second lens E2 can also be that the both sides formed by suppressing flat glass carry spherical surface or aspherical respectively
Overall lens.Optionally, the first lens E1 or the second lens E2 can also be side by adhering to a certain number of hardened plastics
Material, the both sides that the other side is formed by suppressing flat glass carry spherical surface or aspherical overall lens.
Figure 18 shows the vertical of lens arrays 100 according to one embodiment of the application, containing multiple lens units
Body figure.Figure 19 shows the front view of Figure 18.Referring to Figure 18 and Figure 19, lens array 100 can be with flat glass 10 for base
Material, both sides uniformly adhere to a certain number of hardened plastic materials 20 and to carry one or more spherical surfaces (or non-the both sides that are formed
Spherical surface) entirety.The manufacturing process of lens array 100 may comprise steps of：
Step 1：Take such as flat glass as base material；
Step 2：In the opposite both sides hardened plastic body of base material, plastic body is with multiple parts with curvature, to make
Must cure has the base material of plastic body to form lens array；
Step 3：Lens array is cut, makes to be cut into each part and includes at least one part with curvature, and
Each of being cut into part has round, rectangle or polygon edge shape.
Figure 20 shows according to the application another embodiment, containing multiple lens units lens array 200
Front view.Referring to Figure 20, lens array 200 can be there are one the both sides bands of formation by suppressing such as flat glass 10
Or the entirety of multiple spherical surfaces (or aspherical).The manufacturing process of lens array 200 may comprise steps of：
Step 1：Surface glass make even as base material；
Step 2：Base material is suppressed to form multiple parts with curvature in its opposite both sides to form lens array；
Step 3：Lens array is cut, makes to be cut into each part and includes at least one part with curvature, and
Each of being cut into part has round, rectangle or polygon edge shape.
Figure 21 shows according to the application another embodiment, containing multiple lens units lens array 300
Front view.Referring to Figure 21, lens array 300 can be that side is led to by adhering to a certain number of hardened plastic materials 20, side
Cross compacting such as flat glass 10 and entirety of the both sides of formation with one or more spherical surfaces (or aspherical).Lens array
300 manufacturing process may comprise steps of：
Step 1：Surface glass make even as base material；
Step 2：Hardened plastic body on arbitrary side in the opposite sides of base material, and it is another in base material opposite sides
Base material is suppressed on side, it is saturating to be formed to form multiple parts with curvature on the outer surface of the opposite sides of base material
Lens array；
Step 3：Lens array is cut, makes to be cut into each part and includes at least one part with curvature, and
Each of being cut into part has round, rectangle or polygon edge shape.
In the above-described embodiment, the part with curvature can be concave part, or male member.
Figure 22 to Figure 27 shows the lens array for including one or more camera lenses.According to the application another embodiment
Projection lens can be the optical element by multiple arrangements (for example, multiple lens arrays 100, multiple lens arrays 200 or more
A lens array 300) after aligned stack, the lens array including a camera lens or a plurality of lenses is cut into, which can
With for example round, rectangle or polygon edge shape.
Lens array can be advantageously implemented miniaturization, achieve the effect that few boundary even null boundary between array lens.
And set the edge shape of array lens to the shape such as round, rectangle or polygon, be conducive to meet various installations skies
Between requirement to lens shape.
Such as two lens can be used according to the projection lens of the above embodiment of the application, by each lens
Flat glass, and the axis between the center thickness and each lens of each power of lens of reasonable distribution, face type, each lens are set
Upper spacing etc. so that projection lens has the advantageous effects such as miniaturization, high image quality.Meanwhile passing through the projection of above-mentioned configuration
Camera lens can be jointly used cooperatively with diffraction element (DOE).
In presently filed embodiment, at least one of 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 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 two lens as an example in embodiments, but the projection lens is not limited to include two lens.If
It needs, which may also include the lens of other quantity.
The specific embodiment for the projection lens for being applicable to the above embodiment is further described with reference to the accompanying drawings.
Embodiment 1
Referring to Fig. 1 to Fig. 2 descriptions according to the projection lens of the embodiment of the present application 1.Fig. 1 is shown according to the application reality
Apply the structural schematic diagram of the projection lens of example 1.
As shown in Figure 1, according to the projection lens of the application illustrative embodiments along optical axis by image source side at image side according to
Sequence includes：First lens E1, the second lens E2 and diaphragm STO.
It is convex surface that first lens E1, which has positive light coke, image source side surface S1, and image side surfaces S2 is concave surface.First thoroughly
Mirror E1 includes the first flat glass E1p, the first flat glass E1p being arranged between image source side surface S1 and image side surfaces S2
With image source side surface S1p1 and image side surfaces S1p2.E1 points by the first lens of first flat glass E1p is image source side section
E1f and imaging side section E1r.
It is concave surface that second lens E2, which has positive light coke, image source side surface S3, and image side surfaces S4 is convex surface.Second thoroughly
Mirror E2 includes the second flat glass E2p, the second flat glass E2p being arranged between image source side surface S3 and image side surfaces S4
With image source side surface S2p1 and image side surfaces S2p2.E2 points by the second lens of second flat glass E2p is image source side section
E2f and imaging side section E2r.
Light from image source OBJ sequentially passes through each surface S1 to S4, using such as diffractive-optical element DOE (not shown)
Afterwards, it is projected on the target object in space.
The projection lens of the present embodiment is applied to monochromatic source, and the practical application wavelength X of the projection lens is most short
Wavelength is shorter about 0nm-100nm than using the minimal wave length of light source, and the longest wavelength ratio of the practical application wavelength X of projection lens uses
The longest wavelength of light source is about 0nm-100nm.
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 image source of the image source side surface S1 and image side surfaces S2 of the first lens E1 and the second lens E2
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 the position of h, away from aspheric vertex of surface apart from rise；C is
Aspherical paraxial curvature, c=1/R (that is, paraxial curvature c is the inverse of 1 mean curvature radius R of upper table)；K be circular cone coefficient (
It has been provided in table 1)；Ai is the correction factor of aspherical i-th-th ranks.The following table 2 give can be used for it is each aspherical in embodiment 1
The high-order coefficient A of minute surface S1-S44、A6、A8、A10、A12、A14And A16。
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -5.6225E-02 | 6.6074E-01 | -7.1800E+00 | 3.6145E+01 | -1.0523E+02 | 1.6236E+02 | -1.0463E+02 |
| S2 | 6.9649E-01 | 4.8315E+00 | -1.0297E+02 | 1.6917E+03 | -1.3985E+04 | 5.9127E+04 | -9.8341E+04 |
| S3 | -1.6779E-02 | 2.8309E-01 | -1.8121E+00 | 1.0387E+01 | -2.8610E+01 | 6.7556E+01 | -7.9641E+01 |
| S4 | 2.6800E-02 | -1.7740E-02 | 3.4832E-01 | -1.3207E+00 | 2.8532E+00 | -2.9942E+00 | 1.2754E+00 |
Table 2
Table 3 provides total effective focal length f of projection lens in embodiment 1, the effective focal length f1 of the first lens E1, the second lens
The object-side numerical aperture NA and chief ray of the effective focal length f2 of E2, the maximum angle of half field-of view HFOV of projection lens, projection lens
Maximum incident angle degree CRAmax.
Table 3
Projection lens in embodiment 1 meets：
Tan (HFOV)=0.15, wherein HFOV is the maximum angle of half field-of view of projection lens；
CT1/CT2=0.76, wherein CT1 is the first lens E1 in the center thickness on optical axis, and CT2 is the second lens E2
In the center thickness on optical axis；
F2/f=0.80, wherein f2 is the effective focal length of the second lens E2, and f is total effective focal length of projection lens；
CT1p/CT1=0.23, wherein CT1p is the thickness of the flat glass E1p of the first lens E1, and CT1 is the first lens
E1 is in the center thickness on optical axis；
CT2p/CT2=0.18, wherein CT2p is the thickness of the flat glass E2p of the second lens E2, and CT2 is the second lens
E2 is in the center thickness on optical axis；
R4/f=-0.29, wherein R4 is the radius of curvature of the image side surfaces S4 of the second lens E2, and f is projection lens
Total effective focal length；
DT1f/DT2r=0.86, wherein DT1f is maximum half bore of the image source side surface S1 of the first lens E1, DT2r
For maximum half bore of the image side surfaces S4 of the second lens E2.
Fig. 2 shows the distortion curves of the projection lens of embodiment 1, indicate the distortion size in the case of different visual angles
Value.As can be seen from FIG. 2, the projection lens given by embodiment 1 can realize good image quality.
Embodiment 2
Referring to Fig. 3 to Fig. 4 descriptions 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 source side at image side according to
Sequence includes：First lens E1, the second lens E2 and diaphragm STO.
It is convex surface that first lens E1, which has positive light coke, image source side surface S1, and image side surfaces S2 is concave surface.First thoroughly
Mirror E1 includes the first flat glass E1p, the first flat glass E1p being arranged between image source side surface S1 and image side surfaces S2
With image source side surface S1p1 and image side surfaces S1p2.E1 points by the first lens of first flat glass E1p is image source side section
E1f and imaging side section E1r.
It is concave surface that second lens E2, which has positive light coke, image source side surface S3, and image side surfaces S4 is convex surface.Second thoroughly
Mirror E2 includes the second flat glass E2p, the second flat glass E2p being arranged between image source side surface S3 and image side surfaces S4
With image source side surface S2p1 and image side surfaces S2p2.E2 points by the second lens of second flat glass E2p is image source side section
E2f and imaging side section E2r.
Light from image source OBJ sequentially passes through each surface S1 to S4, using such as diffractive-optical element DOE (not shown)
Afterwards, it is projected on the target object in space.
The projection lens of the present embodiment is applied to monochromatic source, and the practical application wavelength X of the projection lens is most short
Wavelength is shorter about 0nm-100nm than using the minimal wave length of light source, and the longest wavelength ratio of the practical application wavelength X of projection lens uses
The longest wavelength of light source is about 0nm-100nm.
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, in example 2, the image source side surface S1 and image side surfaces S2 and second of the first lens E1
The image source side surface S3 and image side surfaces S4 of lens E2 is aspherical.Table 5 show can be used for it is each aspherical in embodiment 2
The high-order 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 | A6 | A8 | A10 | A12 |
| S1 | 3.2948E-01 | -4.2145E-01 | 6.5823E-01 | -9.1905E-01 | 9.3286E-01 |
| S2 | 5.0173E-01 | -1.8383E-01 | 7.4761E+00 | -2.8217E+01 | 0.0000E+00 |
| S3 | -6.8509E-02 | -2.3467E-01 | 6.4607E-01 | -2.0416E+00 | 0.0000E+00 |
| S4 | 5.2046E-03 | -1.6001E-02 | 4.8882E-02 | -5.6673E-02 | 0.0000E+00 |
Table 5
Table 6 provides total effective focal length f of projection lens in embodiment 2, the effective focal length f1 of the first lens E1, the second lens
The object-side numerical aperture NA and chief ray of the effective focal length f2 of E2, the maximum angle of half field-of view HFOV of projection lens, projection lens
Maximum incident angle degree CRAmax.
Table 6
Fig. 4 shows the distortion curve of the projection lens of embodiment 2, indicates the distortion size in the case of different visual angles
Value.As can be seen from FIG. 4, the projection lens given by embodiment 2 can realize 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.Fig. 5 is shown according to the application
The structural schematic diagram of the projection lens of embodiment 3.
As shown in figure 5, according to the projection lens of the application illustrative embodiments along optical axis by image source side at image side according to
Sequence includes：First lens E1, the second lens E2 and diaphragm STO.
It is convex surface that first lens E1, which has positive light coke, image source side surface S1, and image side surfaces S2 is concave surface.First thoroughly
Mirror E1 includes the first flat glass E1p, the first flat glass E1p being arranged between image source side surface S1 and image side surfaces S2
With image source side surface S1p1 and image side surfaces S1p2.E1 points by the first lens of first flat glass E1p is image source side section
E1f and imaging side section E1r.
It is concave surface that second lens E2, which has positive light coke, image source side surface S3, and image side surfaces S4 is convex surface.Second thoroughly
Mirror E2 includes the second flat glass E2p, the second flat glass E2p being arranged between image source side surface S3 and image side surfaces S4
With image source side surface S2p1 and image side surfaces S2p2.E2 points by the second lens of second flat glass E2p is image source side section
E2f and imaging side section E2r.
Light from image source OBJ sequentially passes through each surface S1 to S4, using such as diffractive-optical element DOE (not shown)
Afterwards, it is projected on the target object in space.
The projection lens of the present embodiment is applied to monochromatic source, and the practical application wavelength X of the projection lens is most short
Wavelength is shorter about 0nm-100nm than using the minimal wave length of light source, and the longest wavelength ratio of the practical application wavelength X of projection lens uses
The longest wavelength of light source is about 0nm-100nm.
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, in embodiment 3, the image source side surface S1 and image side surfaces S2 and second of the first lens E1
The image source side surface S3 and image side surfaces S4 of lens E2 is aspherical.Table 8 show can be used for it is each aspherical in embodiment 3
The high-order 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 | A6 | A8 | A10 | A12 |
| S1 | 3.8840E-01 | -8.7365E-01 | 9.0127E-01 | -1.9441E+00 | 3.6165E-01 |
| S2 | 1.9446E+00 | 1.2424E+00 | 3.9599E+01 | -1.7426E+02 | 0.0000E+00 |
| S3 | -2.6976E-01 | 2.3003E+00 | -3.0011E+00 | -4.2538E-01 | 0.0000E+00 |
| S4 | -2.8499E-02 | -7.5251E-02 | 2.2820E-01 | -2.3970E-01 | 0.0000E+00 |
Table 8
Table 9 provides total effective focal length f of projection lens in embodiment 3, the effective focal length f1 of the first lens E1, the second lens
The object-side numerical aperture NA and chief ray of the effective focal length f2 of E2, the maximum angle of half field-of view HFOV of projection lens, projection lens
Maximum incident angle degree CRAmax.
Table 9
Fig. 6 shows the distortion curve of the projection lens of embodiment 3, indicates the distortion size in the case of different visual angles
Value.As can be seen from FIG. 6, the projection lens given by embodiment 3 can realize 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.Fig. 7 is shown according to the application
The structural schematic diagram of the projection lens of embodiment 4.
As shown in fig. 7, according to the projection lens of the application illustrative embodiments along optical axis by image source side at image side according to
Sequence includes：First lens E1, the second lens E2 and diaphragm STO.
It is convex surface that first lens E1, which has positive light coke, image source side surface S1, and image side surfaces S2 is concave surface.First thoroughly
Mirror E1 includes the first flat glass E1p, the first flat glass E1p being arranged between image source side surface S1 and image side surfaces S2
With image source side surface S1p1 and image side surfaces S1p2.E1 points by the first lens of first flat glass E1p is image source side section
E1f and imaging side section E1r.
It is concave surface that second lens E2, which has positive light coke, image source side surface S3, and image side surfaces S4 is convex surface.Second thoroughly
Mirror E2 includes the second flat glass E2p, the second flat glass E2p being arranged between image source side surface S3 and image side surfaces S4
With image source side surface S2p1 and image side surfaces S2p2.E2 points by the second lens of second flat glass E2p is image source side section
E2f and imaging side section E2r.
Light from image source OBJ sequentially passes through each surface S1 to S4, using such as diffractive-optical element DOE (not shown)
Afterwards, it is projected on the target object in space.
The projection lens of the present embodiment is applied to monochromatic source, and the practical application wavelength X of the projection lens is most short
Wavelength is shorter about 0nm-100nm than using the minimal wave length of light source, and the longest wavelength ratio of the practical application wavelength X of projection lens uses
The longest wavelength of light source is about 0nm-100nm.
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, in example 4, the image source side surface S1 and image side surfaces S2 and second of the first lens E1
The image source side surface S3 and image side surfaces S4 of lens E2 is aspherical.Table 11, which is shown, can be used for each aspheric in embodiment 4
The high-order 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 |
| S1 | 1.8690E+00 | -4.4898E+00 | 7.9989E+00 | -5.3227E+00 | -1.1876E+00 |
| S2 | 6.8133E+00 | -4.5339E+01 | 2.8660E+02 | -6.4854E+02 | 0.0000E+00 |
| S3 | -4.6988E-01 | 8.6103E-01 | -5.0179E-01 | -1.0011E+00 | 0.0000E+00 |
| S4 | 5.8622E-03 | -3.4423E-02 | 1.0137E-01 | -7.8834E-02 | 0.0000E+00 |
Table 11
Table 12 provides total effective focal length f of projection lens in embodiment 4, the effective focal length f1 of the first lens E1, second thoroughly
The object-side numerical aperture NA and key light of the effective focal length f2 of mirror E2, the maximum angle of half field-of view HFOV of projection lens, projection lens
The maximum incident angle degree CRAmax of line.
Table 12
Fig. 8 shows the distortion curve of the projection lens of embodiment 4, indicates the distortion size in the case of different visual angles
Value.As can be seen from FIG. 8, the projection lens given by embodiment 4 can realize 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.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 source side at image side according to
Sequence includes：First lens E1, the second lens E2 and diaphragm STO.
It is concave surface that first lens E1, which has positive light coke, image source side surface S1, and image side surfaces S2 is convex surface.First thoroughly
Mirror E1 includes the first flat glass E1p, the first flat glass E1p being arranged between image source side surface S1 and image side surfaces S2
With image source side surface S1p1 and image side surfaces S1p2.E1 points by the first lens of first flat glass E1p is image source side section
E1f and imaging side section E1r.
It is concave surface that second lens E2, which has positive light coke, image source side surface S3, and image side surfaces S4 is convex surface.Second thoroughly
Mirror E2 includes the second flat glass E2p, the second flat glass E2p being arranged between image source side surface S3 and image side surfaces S4
With image source side surface S2p1 and image side surfaces S2p2.E2 points by the second lens of second flat glass E2p is image source side section
E2f and imaging side section E2r.
Light from image source OBJ sequentially passes through each surface S1 to S4, using such as diffractive-optical element DOE (not shown)
Afterwards, it is projected on the target object in space.
The projection lens of the present embodiment is applied to monochromatic source, and the practical application wavelength X of the projection lens is most short
Wavelength is shorter about 0nm-100nm than using the minimal wave length of light source, and the longest wavelength ratio of the practical application wavelength X of projection lens uses
The longest wavelength of light source is about 0nm-100nm.
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, in embodiment 5, the image source side surface S1 and image side surfaces S2 and second of the first lens E1
The image source side surface S3 and image side surfaces S4 of lens E2 is aspherical.Table 14, which is shown, can be used for each aspheric in embodiment 5
The high-order 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 |
| S1 | 8.5009E-01 | 1.3345E-01 | -1.2386E+00 | 1.5786E+00 | -6.4733E-01 |
| S2 | 3.9011E-01 | 3.7352E-01 | -5.2303E-01 | 3.3092E+00 | 0.0000E+00 |
| S3 | 9.4435E-02 | -2.5150E-01 | 9.5807E-01 | -7.6838E-01 | 0.0000E+00 |
| S4 | 9.4040E-03 | -1.2408E-02 | 1.9358E-02 | -1.1645E-02 | 0.0000E+00 |
Table 14
Table 15 provides total effective focal length f of projection lens in embodiment 5, the effective focal length f1 of the first lens E1, second thoroughly
The object-side numerical aperture NA and key light of the effective focal length f2 of mirror E2, the maximum angle of half field-of view HFOV of projection lens, projection lens
The maximum incident angle degree CRAmax of line.
Table 15
Figure 10 shows the distortion curve of the projection lens of embodiment 5, indicates the distortion size in the case of different visual angles
Value.As can be seen from FIG. 10, the projection lens given by embodiment 5 can realize 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.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 source side at image side according to
Sequence includes：First lens E1, the second lens E2 and diaphragm STO.
It is convex surface that first lens E1, which has positive light coke, image source side surface S1, and image side surfaces S2 is concave surface.First thoroughly
Mirror E1 includes the first flat glass E1p, the first flat glass E1p being arranged between image source side surface S1 and image side surfaces S2
With image source side surface S1p1 and image side surfaces S1p2.E1 points by the first lens of first flat glass E1p is image source side section
E1f and imaging side section E1r.
It is concave surface that second lens E2, which has positive light coke, image source side surface S3, and image side surfaces S4 is convex surface.Second thoroughly
Mirror E2 includes the second flat glass E2p, the second flat glass E2p being arranged between image source side surface S3 and image side surfaces S4
With image source side surface S2p1 and image side surfaces S2p2.E2 points by the second lens of second flat glass E2p is image source side section
E2f and imaging side section E2r.
Light from image source OBJ sequentially passes through each surface S1 to S4, using such as diffractive-optical element DOE (not shown)
Afterwards, it is projected on the target object in space.
The projection lens of the present embodiment is applied to monochromatic source, and the practical application wavelength X of the projection lens is most short
Wavelength is shorter about 0nm-100nm than using the minimal wave length of light source, and the longest wavelength ratio of the practical application wavelength X of projection lens uses
The longest wavelength of light source is about 0nm-100nm.
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, in embodiment 6, the image source side surface S1 and image side surfaces S2 and second of the first lens E1
The image source side surface S3 and image side surfaces S4 of lens E2 is aspherical.Table 17, which is shown, can be used for each aspheric in embodiment 6
The high-order 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 |
| S1 | 1.2327E+00 | -6.9878E-01 | -9.2988E-01 | 3.2051E+00 | -2.3427E+00 |
| S2 | 5.8428E-01 | 2.7787E+00 | -1.4997E+01 | 8.2352E+01 | 0.0000E+00 |
| S3 | -4.2555E-01 | -1.7296E+00 | 5.9905E+00 | -4.3330E+01 | 0.0000E+00 |
| S4 | -2.1384E-01 | -1.0789E-01 | 6.8234E-02 | -2.1560E-01 | 0.0000E+00 |
Table 17
Table 18 provides total effective focal length f of projection lens in embodiment 6, the effective focal length f1 of the first lens E1, second thoroughly
The object-side numerical aperture NA and key light of the effective focal length f2 of mirror E2, the maximum angle of half field-of view HFOV of projection lens, projection lens
The maximum incident angle degree CRAmax of line.
Table 18
Figure 12 shows the distortion curve of the projection lens of embodiment 6, indicates the distortion size in the case of different visual angles
Value.As can be seen from FIG. 12, the projection lens given by embodiment 6 can realize 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.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 source side at image side according to
Sequence includes：First lens E1, the second lens E2 and diaphragm STO.
It is convex surface that first lens E1, which has positive light coke, image source side surface S1, and image side surfaces S2 is concave surface.First thoroughly
Mirror E1 includes the first flat glass E1p, the first flat glass E1p being arranged between image source side surface S1 and image side surfaces S2
With image source side surface S1p1 and image side surfaces S1p2.E1 points by the first lens of first flat glass E1p is image source side section
E1f and imaging side section E1r.
It is concave surface that second lens E2, which has positive light coke, image source side surface S3, and image side surfaces S4 is convex surface.Second thoroughly
Mirror E2 includes the second flat glass E2p, the second flat glass E2p being arranged between image source side surface S3 and image side surfaces S4
With image source side surface S2p1 and image side surfaces S2p2.E2 points by the second lens of second flat glass E2p is image source side section
E2f and imaging side section E2r.
Light from image source OBJ sequentially passes through each surface S1 to S4, using such as diffractive-optical element DOE (not shown)
Afterwards, it is projected on the target object in space.
The projection lens of the present embodiment is applied to monochromatic source, and the practical application wavelength X of the projection lens is most short
Wavelength is shorter about 0nm-100nm than using the minimal wave length of light source, and the longest wavelength ratio of the practical application wavelength X of projection lens uses
The longest wavelength of light source is about 0nm-100nm.
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, in embodiment 7, the image source side surface S1 and image side surfaces S2 and second of the first lens E1
The image source side surface S3 and image side surfaces S4 of lens E2 is aspherical.Table 20, which is shown, can be used for each aspheric in embodiment 7
The high-order 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 | -4.4844E-02 | 6.1360E-01 | -7.5291E+00 | 3.6384E+01 | -1.0445E+02 | 1.6047E+02 | -1.0495E+02 |
| S2 | 7.0215E-01 | 5.1920E+00 | -9.2208E+01 | 1.5786E+03 | -1.3874E+04 | 6.4157E+04 | -1.1585E+05 |
| S3 | 5.4149E-03 | 2.4368E-01 | -1.4111E+00 | 1.1014E+01 | -3.2786E+01 | 5.1390E+01 | -9.2683E+00 |
| S4 | 2.9852E-02 | -1.7764E-02 | 3.6515E-01 | -1.3303E+00 | 2.8304E+00 | -2.9762E+00 | 1.3198E+00 |
Table 20
Table 21 provides total effective focal length f of projection lens in embodiment 7, the effective focal length f1 of the first lens E1, second thoroughly
The object-side numerical aperture NA and key light of the effective focal length f2 of mirror E2, the maximum angle of half field-of view HFOV of projection lens, projection lens
The maximum incident angle degree CRAmax of line.
Table 21
Figure 14 shows the distortion curve of the projection lens of embodiment 7, indicates the distortion size in the case of different visual angles
Value.As can be seen from FIG. 14, the projection lens given by embodiment 7 can realize 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.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 source side at image side according to
Sequence includes：First lens E1, the second lens E2 and diaphragm STO.
It is convex surface that first lens E1, which has positive light coke, image source side surface S1, and image side surfaces S2 is concave surface.First thoroughly
Mirror E1 includes the first flat glass E1p, the first flat glass E1p being arranged between image source side surface S1 and image side surfaces S2
With image source side surface S1p1 and image side surfaces S1p2.E1 points by the first lens of first flat glass E1p is image source side section
E1f and imaging side section E1r.
It is concave surface that second lens E2, which has positive light coke, image source side surface S3, and image side surfaces S4 is convex surface.Second thoroughly
Mirror E2 includes the second flat glass E2p, the second flat glass E2p being arranged between image source side surface S3 and image side surfaces S4
With image source side surface S2p1 and image side surfaces S2p2.E2 points by the second lens of second flat glass E2p is image source side section
E2f and imaging side section E2r.
Light from image source OBJ sequentially passes through each surface S1 to S4, using such as diffractive-optical element DOE (not shown)
Afterwards, it is projected on the target object in space.
The projection lens of the present embodiment is applied to monochromatic source, and the practical application wavelength X of the projection lens is most short
Wavelength is shorter about 0nm-100nm than using the minimal wave length of light source, and the longest wavelength ratio of the practical application wavelength X of projection lens uses
The longest wavelength of light source is about 0nm-100nm.
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, in embodiment 8, the image source side surface S1 and image side surfaces S2 and second of the first lens E1
The image source side surface S3 and image side surfaces S4 of lens E2 is aspherical.Table 23, which is shown, can be used for each aspheric in embodiment 8
The high-order 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 | -1.1131E-01 | 5.1307E-01 | -6.5118E+00 | 3.3377E+01 | -1.0043E+02 | 1.5899E+02 | -1.0601E+02 |
| S2 | 7.0141E-01 | 5.1257E+00 | -1.0198E+02 | 1.6717E+03 | -1.4281E+04 | 6.3900E+04 | -1.1423E+05 |
| S3 | -1.4708E-02 | 2.0285E-01 | -8.1941E-01 | 8.5566E+00 | -3.1612E+01 | 1.0526E+02 | -9.1125E+01 |
| S4 | 3.5034E-02 | -2.0306E-02 | 3.8093E-01 | -1.3274E+00 | 2.7894E+00 | -2.9170E+00 | 1.2954E+00 |
Table 23
Table 24 provides total effective focal length f of projection lens in embodiment 8, the effective focal length f1 of the first lens E1, second thoroughly
The object-side numerical aperture NA and key light of the effective focal length f2 of mirror E2, the maximum angle of half field-of view HFOV of projection lens, projection lens
The maximum incident angle degree CRAmax of line.
Table 24
Figure 16 shows the distortion curve of the projection lens of embodiment 8, indicates the distortion size in the case of different visual angles
Value.As can be seen from FIG. 16, the projection lens given by embodiment 8 can realize good image quality.
To sum up, embodiment 1 to embodiment 8 meets relationship shown in table 25 respectively.
Table 25
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 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
Other technical solutions of arbitrary combination and formation.Such as features described above has similar work(with (but not limited to) disclosed herein
Can technical characteristic replaced mutually and the technical solution that is formed.
Claims (13)
1. projection lens, which is characterized in that the projection lens is along optical axis by image source side at image side including sequentially：With light
The first lens and the second lens of focal power,
First lens include the image side surfaces being arranged in the image source side surface of first lens and first lens
Between the first flat glass；
Second lens include the image side surfaces being arranged in the image source side surface of second lens and second lens
Between the second flat glass.
2. projection lens according to claim 1, which is characterized in that the thickness CT1p of first flat glass with it is described
First lens meet 0.1 ＜ CT1p/CT1 ＜ 0.5 in the center thickness CT1 on the optical axis.
3. projection lens according to claim 1, which is characterized in that the thickness CT2p of second flat glass with it is described
Second lens meet 0.1 ＜ CT2p/CT2 ＜ 0.5 in the center thickness CT2 on the optical axis.
4. projection lens according to claim 2, which is characterized in that first lens are thick in the center on the optical axis
It spends CT1 and meets 0.6 ＜ CT1/CT2 ＜ 1.4 in the center thickness CT2 on the optical axis with second lens.
5. projection lens according to claim 1, which is characterized in that first lens and second lens all have
Positive light coke.
6. projection lens according to claim 5, which is characterized in that the effective focal length f2 of second lens and the throwing
Total effective focal length f of shadow camera lens meets 0.6 ＜ f2/f ＜ 1.6.
7. projection lens according to claim 6, which is characterized in that the image source side surface of second lens is concave surface,
Image side surfaces are convex surface；
The radius of curvature R 4 of the image side surfaces of second lens meets -0.5 ＜ with total effective focal length f of the projection lens
R4/f ＜ -0.1.
8. projection lens according to claim 1, which is characterized in that the image source side surface of first lens maximum half
Bore DT1f and maximum half bore DT2r of the image side surfaces of second lens meet 0.8 ＜ DT1f/DT2r ＜ 1.2.
9. projection lens according to any one of claim 1 to 8, which is characterized in that the projection lens maximum half
Field angle HFOV meets tan (HFOV) ＜ 0.26.
10. projection lens according to any one of claim 1 to 8, which is characterized in that the object space number of the projection lens
Value aperture NA meets NA ＞ 0.18.
11. projection lens according to any one of claim 1 to 8, which is characterized in that the reality of the projection lens is answered
With the minimal wave length of wavelength X than using the minimal wave length of light source short 0nm-100nm, the practical application wavelength X of the projection lens
Longest wavelength than using the longest wavelength of light source long 0nm-100nm.
12. projection lens according to any one of claim 1 to 8, which is characterized in that the chief ray of the projection lens
Maximum incident angle degree CRAmax meet 10 ° of CRAmax ＜.
13. a kind of projection lens is cut by the optic alignment heap poststack of multiple arrangements containing there are one camera lens or multiple mirrors
The lens array of head, which is characterized in that the edge shape of the lens array is round, rectangle or polygon.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820213319.6U CN207764539U (en) | 2018-02-07 | 2018-02-07 | Projection lens |
| PCT/CN2018/100481 WO2019153695A1 (en) | 2018-02-07 | 2018-08-14 | Projection lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820213319.6U CN207764539U (en) | 2018-02-07 | 2018-02-07 | Projection lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207764539U true CN207764539U (en) | 2018-08-24 |
Family
ID=63180100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820213319.6U Active CN207764539U (en) | 2018-02-07 | 2018-02-07 | Projection lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207764539U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108132575A (en) * | 2018-02-07 | 2018-06-08 | 浙江舜宇光学有限公司 | Projection lens |
-
2018
- 2018-02-07 CN CN201820213319.6U patent/CN207764539U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108132575A (en) * | 2018-02-07 | 2018-06-08 | 浙江舜宇光学有限公司 | Projection lens |
| CN108132575B (en) * | 2018-02-07 | 2020-05-08 | 浙江舜宇光学有限公司 | Projection lens |
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