CN206725845U - A kind of eyepiece - Google Patents
A kind of eyepiece Download PDFInfo
- Publication number
- CN206725845U CN206725845U CN201720560612.5U CN201720560612U CN206725845U CN 206725845 U CN206725845 U CN 206725845U CN 201720560612 U CN201720560612 U CN 201720560612U CN 206725845 U CN206725845 U CN 206725845U
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- spherical lens
- eyepiece
- thing side
- light
- image side
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Abstract
This application discloses a kind of eyepiece, an embodiment of the eyepiece includes what is be arranged in order by thing side to image side：Aperture member；The first non-spherical lens with positive light coke；The second non-spherical lens with negative power, the thing side of the second non-spherical lens and image side surface are convex surface；The 3rd non-spherical lens with negative power, the thing side of the 3rd non-spherical lens and image side surface are concave surface；The 4th non-spherical lens with positive light coke, the thing side of the 4th non-spherical lens is convex surface, and the image side surface of the 4th non-spherical lens is concave surface.Lens numbers are few in the eyepiece, can reduce the volume and weight of eyepiece, and being capable of effective aberration correction.
Description
Technical field
The application is related to optical field, and in particular to optical imaging system technical field, more particularly to a kind of eyepiece.
Background technology
With the continuous development of optical design techniques, the continuous expansion of the application field of optical imaging system, optical imagery
Equipment is applied in virtual reality and the scene of augmented reality more and more widely, such as is applied in helmet-mounted display and eye
In mirror type display.
In the optical imaging system design of existing some helmet-mounted displays and glasses type displayer, in order to ensure to wear
User there is strong feeling of immersion, higher requirement is proposed to the imaging definition of optical imaging system.In order to meet into
Requirement in terms of image sharpness, the knot of the eyepiece in the optical imaging system of existing helmet-mounted display and glasses type displayer
Structure is complex, is made up of substantial amounts of lens element, and its quality is generally larger, and wear comfort has to be hoisted.
Utility model content
In order to solve one or more technical problems that above-mentioned background section is mentioned, the embodiment of the present application provides one
Kind eyepiece.
The eyepiece that the embodiment of the present application provides, including be arranged in order by thing side to image side：Aperture member；With positive light focus
First non-spherical lens of degree；The second non-spherical lens with negative power, the thing side of the second non-spherical lens and image side
Face is convex surface；The 3rd non-spherical lens with negative power, the thing side of the 3rd non-spherical lens and image side surface are recessed
Face；The 4th non-spherical lens with positive light coke, the thing side of the 4th non-spherical lens is convex surface, the 4th non-spherical lens
Image side surface is concave surface.
In certain embodiments, above-mentioned eyepiece meets：1.2<f/f1<1.3；0.9<D/f<1.1；Wherein, D be eyepiece into
Maximum imaging circular diameter in image planes, f are the effective focal length of eyepiece, and f1 is the effective focal length of the first non-spherical lens.
In certain embodiments, above-mentioned eyepiece meets：D/THL ＞ 0.6；D/L ＞ 0.9；Wherein, L is the 4th aspherical
The optics effective diameter of the image side surface of mirror, THL are the thing side of the first non-spherical lens to light of the imaging surface along eyepiece of eyepiece
The distance of direction of principal axis.
In certain embodiments, above-mentioned eyepiece meets：0.8<ΣCT/THL<0.9；Wherein, Σ CT are first aspherical
Mirror, the second non-spherical lens, the 3rd non-spherical lens and the 4th non-spherical lens are in the thickness summation on the optical axis of eyepiece.
In certain embodiments, the non-spherical lens of radius of curvature R 1 and the 3rd of the thing side of above-mentioned first non-spherical lens
The radius of curvature R 3 of thing side meet：- 0.8 ＜ R1/R3 ＜ -0.7.
In certain embodiments, the first non-spherical lens, the second non-spherical lens, the 4th non-spherical lens are to wavelength
The abbe number of 587.56nm light is identical；First non-spherical lens, the second non-spherical lens, the 4th non-spherical lens are to ripple
The refractive index of a length of 587.56nm light is identical.
In certain embodiments, abbe number v1 ＞ 55 of first non-spherical lens to wavelength for 587.56nm light,
Refractive index n1 ＜ 1.6 of first non-spherical lens to wavelength for 587.56nm light.
In certain embodiments, the 3rd non-spherical lens meets to the abbe number v3 for the light that wavelength is 587.56nm：
19 ＜ v3 ＜ 21；3rd non-spherical lens meets to the refractive index n3 for the light that wavelength is 587.56nm：1.6 ＜ n3 ＜ 1.7.
In certain embodiments, the image side surface of the 4th non-spherical lens and the imaging surface of eyepiece are along the optical axis direction of eyepiece
Distance is not less than 3.8mm.
In certain embodiments, distance of the aperture member to the thing side of the first non-spherical lens along optical axis is 13mm.
The eyepiece that the embodiment of the present application provides, number of lenses is few, can reduce the weight and volume of eyepiece, and utilize non-
Spherical lens can effectively correct all kinds of aberrations, can obtain good imaging effect.
Brief description of the drawings
Non-limiting example is described in detail with reference to what the following drawings was made by reading, other features,
Objects and advantages will become more apparent upon：
Fig. 1 is a structural representation according to the eyepiece of the embodiment of the present application；
Fig. 2 is the axial chromatic aberration curve synoptic diagram of the eyepiece to different-waveband light of the application one embodiment；
Fig. 3 is the chromatic longitudiinal aberration curve synoptic diagram of the eyepiece to different-waveband light of the application one embodiment；
Fig. 4 is the transfer curve schematic diagram of the eyepiece of the application one embodiment.
Embodiment
The application is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining relevant utility model, rather than the restriction to the utility model.Further need exist for illustrating
, for the ease of description, illustrate only in accompanying drawing to about the related part of utility model.
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the application in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Fig. 1 is refer to, it illustrates a kind of schematic construction of the eyepiece according to the embodiment of the present application.
As shown in figure 1, eyepiece 100 includes the aperture member being arranged in order as thing side to image side (direction of arrow shown in Fig. 1)
10th, the first non-spherical lens 1, the second non-spherical lens 2, the 3rd non-spherical lens 3 and the 4th non-spherical lens 4.Wherein
One non-spherical lens 1 has positive light coke；Second non-spherical lens 2 has negative power, and the thing side of the second non-spherical lens 2
Face and image side surface are convex surface；3rd non-spherical lens 3 has negative power, and the thing side of the 3rd non-spherical lens 3 and picture
Side is concave surface；4th non-spherical lens 4 has positive light coke, and the thing side of the 4th non-spherical lens 4 is convex surface, the
The image side surface of four non-spherical lenses 4 is concave surface.Above-mentioned first non-spherical lens 1, the second non-spherical lens the 2, the 3rd are aspherical
Mirror 3, the coaxial design of the 4th non-spherical lens 4.In Fig. 1, IMA is imaging surface, positioned at the image side of the 4th non-spherical lens 4.
Eyepiece maximum field of view angle can reach 51 ° in the present embodiment, wherein the lens numbers included are less, be advantageous to reduce
The weight of eyepiece simultaneously reduces cost, and wear comfort can be lifted when in applied to virtual reality device, strengthens feeling of immersion.And
And each lens use aspheric design in eyepiece, all kinds of aberrations can be effectively corrected.
In certain embodiments, the effective focal length f1 of the first non-spherical lens 1, the effective focal length f of eyepiece 100 and imaging
Maximum imaging diameter of a circle D meets on face：1.2<f/f1<1.3；0.9<D/f<1.1.In this manner it is ensured that eyepiece has enough
Big imaging surface, and light effectively can be focused on imaging surface by the first non-spherical lens and whole eyepiece system, and it is raw
Into the image of suitable size.It is alternatively possible to the above-mentioned parameter of eyepiece is designed as follows：D=18mm, f=18.5mm, f1=
14.28mm。
In certain embodiments, above-mentioned eyepiece 100 can meet：D/THL ＞ 0.6；D/L ＞ 0.9；Wherein, THL first
The thing side of non-spherical lens 1 to eyepiece distances of the imaging surface IMA along the optical axis direction of eyepiece；L is the 4th non-spherical lens 4
Image side surface optics effective diameter, i.e., the image side surface of the 4th non-spherical lens 4 be used for transmission ray part diameter.In reality
In the design of border, THL can be, for example, 42.23mm, and L can be, for example, 19mm.Eyepiece can be ensured by meeting the eyepiece of above-mentioned condition
Overall dimension will not be excessive, can coordinate small size shell application in an imaging device.
In certain embodiments, above-mentioned eyepiece can meet：0.8<ΣCT/THL<0.9；Wherein, THL is first aspherical
To distances of the imaging surface IMA along the optical axis direction of eyepiece of eyepiece, Σ CT are the first non-spherical lens 1, for the thing side of lens 1
Two non-spherical lenses 2, the 3rd non-spherical lens 3 and the 4th non-spherical lens 4 are in the thickness summation on the optical axis of eyepiece.Can be with
Find out, meet the bigger of the total length of the gross thickness of each lens and eyepiece in the eyepiece of the condition, it is ensured that the length of eyepiece
Degree is in the range of design requirement.
In certain embodiments, the non-spherical lens 3 of radius of curvature R 1 and the 3rd of the thing side of the first non-spherical lens 1
Thing flank radius R3 meets：- 0.8 ＜ R1/R3 ＜ -0.7.Meet that the eyepiece of the condition can effective program for correcting phase difference.
In certain embodiments, the first non-spherical lens 1, the second non-spherical lens 2, the 4th non-spherical lens 4 are to wavelength
Abbe number for 587.56nm light is identical；It is first non-spherical lens 1, the second non-spherical lens 2, the described 4th aspherical
Lens 4 are identical to the refractive index for the light that wavelength is 587.56nm.Further, the first non-spherical lens 1, second is aspherical
Mirror 2, the 4th non-spherical lens 4 can use identical material, it is alternatively possible to using plastic material, so as to further reduce
The weight of eyepiece.Alternatively, abbe number v1 ＞ 55 of above-mentioned first non-spherical lens to wavelength for 587.56nm light, example
As v1 can be 56.1483, above-mentioned first non-spherical lens to wavelength be 587.56nm light refractive index n1 ＜ 1.6, example
If n1 can be 1.5439.Above-mentioned first aspherical mirror 1, the second aspherical mirror 2, the abbe number of the 4th aspherical mirror 4 are larger,
Aberration can be reduced.And same material can be used to make, make eyepiece compared with easy processing.
In certain embodiments, the 3rd non-spherical lens 3 meets to the abbe number v3 for the light that wavelength is 587.56nm：
19 ＜ v3 ＜ 21；3rd non-spherical lens 3 meets to the refractive index n3 for the light that wavelength is 587.56nm：1.6 ＜ n3 ＜ 1.7.
Such as v3 is 20.40, n3 1.66.In this manner it is ensured that ocular focusing line has good convergence ability, and picture can be corrected
Difference.
In certain embodiments, the light of the image side surface of above-mentioned 4th non-spherical lens 4 and the imaging surface IMA of eyepiece along eyepiece
The distance of direction of principal axis is not less than 3.8mm, in this manner it is ensured that size burnt after eyepiece, is advantageous to eyepiece and imaging device its
Assembling between his element and imaging device and display screen.
In certain embodiments, the thing side of the above-mentioned non-spherical lens of aperture member 10 to the first 1 is along the distance of optical axis
13mm, the distance can lift wear comfort.
Refer to Fig. 2, Fig. 3 and Fig. 4, which respectively show the axial chromatic aberration curve of the eyepiece of the application one embodiment,
Chromatic longitudiinal aberration curve and transfer curve schematic diagram.
Herein, the parameter of each lens in above-mentioned eyepiece is as shown in table one and table two.Wherein, STO represents aperture member
10, the thing side of the first non-spherical lens and the sequence number of image side surface are respectively 2 and 3, the thing side of the second non-spherical lens and picture
The sequence number of side is respectively 4 and 5, and the thing side of the 3rd non-spherical lens and the sequence number of image side surface are respectively 6 and 7, the 4th aspheric
The thing side of face lens and the sequence number of image side surface are respectively 8 and 9, imaging surface IMA serial number 10.K is circular cone coefficient；R is song
Rate radius；A2 (not shown in table two), A4, A6, A8, A10, A12 are the asphericity coefficient in following aspherical equation (1)：
Each component parameters in the eyepiece of table one
| Face sequence number | Surface type | Radius of curvature (R)/mm | Center thickness/mm | Refractive index Nd | Abbe constant Vd |
| STO | Sphere | INF | 13 | ||
| 2 | It is aspherical | 17.381 | 5.922 | 1.543902 | 56.1483 |
| 3 | It is aspherical | -12.360 | 0.0999 | ||
| 4 | It is aspherical | -23.57 | 6.0 | 1.543902 | 56.1483 |
| 5 | It is aspherical | -39.09 | 0.385 | ||
| 6 | It is aspherical | -41.61 | 4.697 | 1.66059 | 20.4012 |
| 7 | It is aspherical | 17.19 | 2.228 | ||
| 8 | It is aspherical | 7.395 | 5.999 | 1.543902 | 56.1483 |
| 9 | It is aspherical | 13.837 | 3.899 | ||
| 10 | Sphere | INF |
The aspherical parameter of each element in the eyepiece of table two
Figure it is seen that the axial chromatic aberration of above-mentioned eyepiece changes with the size variation of pupil.Above-mentioned eyepiece is to wavelength
It is no more than 0.015mm for 0.486 μm, 0.587 μm, the axial chromatic aberration of 0.656 μm of light.From figure 3, it can be seen that above-mentioned eyepiece
Chromatic longitudiinal aberration change (maximum field of view angle here be 51 °) with the change of the angle of visual field, to the vertical axle color of each wave band light
Difference is no more than 6 μm, and is 0 for the chromatic longitudiinal aberration for the light that wavelength is 0.587 μm.Understand that the aberration of above-mentioned eyepiece is smaller,
Imaging effect is preferable.
Fig. 4 is refer to, it illustrates maximum angle of half field-of view (25.5 °), 21 ° of angles of visual field, 15.5 ° of angles of visual field and 0 ° of visual field
Modulation transfer function (Modulation Transfer Function, MTF) curve under angle, the longitudinal axis represent mtf value, and value exists
Between 0-1；Transverse axis is resolution ratio, and unit is lp/mm (line right/millimeter).Wherein, 25.5 ° of T and 25.5 ° of S represent incident light respectively
Meridian direction and the MTF curve in sagitta of arc direction, 21 ° of T and 21 ° of S represent that angle of incident light is respectively when line angle degree is 25.5 °
Meridian direction and the MTF curve in the sagitta of arc direction at 21 °, 15.5 ° of T and 15.5 ° of S represent respectively angle of incident light be 15.5 ° when
Meridian direction and the MTF curve in sagitta of arc direction, 0 ° of curve table show meridian direction and the sagitta of arc direction when angle of incident light is 0 °
MTF curve.
From fig. 4, it can be seen that the rate of decay that mtf value rises with resolution ratio is smaller, ultimate resolution can reach 70lp/
mm.When resolution ratio reaches 70lp/mm, the mtf value of each visual field is all higher than 0.3, it was demonstrated that the eyepiece tool that the embodiment of the present application provides
There is good imaging performance.
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 utility model scope involved in the application, however it is not limited to what the particular combination of above-mentioned technical characteristic formed
Technical scheme, while should also cover in the case where not departing from the design of above-mentioned utility model, by above-mentioned technical characteristic or its be equal
Other technical schemes that feature is combined and formed.Such as features described above has with (but not limited to) disclosed herein
The technical scheme that the technical characteristic for having similar functions is replaced mutually and formed.
Claims (10)
1. a kind of eyepiece, it is characterised in that including what is be arranged in order by thing side to image side：
Aperture member；
The first non-spherical lens with positive light coke；
The second non-spherical lens with negative power, the thing side of second non-spherical lens and image side surface are convex surface；
The 3rd non-spherical lens with negative power, the thing side of the 3rd non-spherical lens and image side surface are concave surface；
The 4th non-spherical lens with positive light coke, the thing side of the 4th non-spherical lens is convex surface, and the described 4th is non-
The image side surface of spherical lens is concave surface.
2. eyepiece according to claim 1, it is characterised in that the eyepiece meets：
1.2<f/f1<1.3；0.9<D/f<1.1；
Wherein, D is maximum imaging circular diameter on the imaging surface of the eyepiece, and f is the effective focal length of the eyepiece, and f1 is described the
The effective focal length of one non-spherical lens.
3. eyepiece according to claim 1, it is characterised in that the eyepiece meets：
D/THL ＞ 0.6；D/L ＞ 0.9；
Wherein, THL is the thing side of first non-spherical lens to optical axis side of the imaging surface along the eyepiece of the eyepiece
To distance, L be the 4th non-spherical lens image side surface optics effective diameter.
4. eyepiece according to claim 3, it is characterised in that the eyepiece meets：
0.8<ΣCT/THL<0.9；
Wherein, Σ CT be first non-spherical lens, second non-spherical lens, the 3rd non-spherical lens and institute
The 4th non-spherical lens is stated in the thickness summation on the optical axis of the eyepiece.
5. eyepiece according to claim 1, it is characterised in that the radius of curvature of the thing side of first non-spherical lens
The radius of curvature R 3 of the thing side of R1 and the 3rd non-spherical lens meets：- 0.8 ＜ R1/R3 ＜ -0.7.
6. eyepiece according to claim 1, it is characterised in that first non-spherical lens, described second aspherical
Mirror, the 4th non-spherical lens are identical to the abbe number for the light that wavelength is 587.56nm；First non-spherical lens,
Second non-spherical lens, the 4th non-spherical lens are identical to the refractive index for the light that wavelength is 587.56nm.
7. eyepiece according to claim 6, it is characterised in that first non-spherical lens is 587.56nm's to wavelength
The abbe number v1 ＞ 55 of light, refractive index n1 ＜ 1.6 of first non-spherical lens to wavelength for 587.56nm light.
8. eyepiece according to claim 1, it is characterised in that the 3rd non-spherical lens is 587.56nm's to wavelength
The abbe number v3 of light meets：19 ＜ v3 ＜ 21；Folding of 3rd non-spherical lens to wavelength for 587.56nm light
Penetrate rate n3 satisfactions：1.6 ＜ n3 ＜ 1.7.
9. eyepiece according to claim 1, it is characterised in that the image side surface of the 4th non-spherical lens and the eyepiece
The distance of optical axis direction of the imaging surface along the eyepiece be not less than 3.8mm.
10. eyepiece according to claim 1, it is characterised in that the aperture member to first non-spherical lens
Distance of the thing side along optical axis is 13mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720560612.5U CN206725845U (en) | 2017-05-19 | 2017-05-19 | A kind of eyepiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720560612.5U CN206725845U (en) | 2017-05-19 | 2017-05-19 | A kind of eyepiece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206725845U true CN206725845U (en) | 2017-12-08 |
Family
ID=60512417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720560612.5U Expired - Fee Related CN206725845U (en) | 2017-05-19 | 2017-05-19 | A kind of eyepiece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206725845U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111694147A (en) * | 2020-06-24 | 2020-09-22 | 深圳珑璟光电技术有限公司 | Eyepiece lens and eyepiece optical system |
-
2017
- 2017-05-19 CN CN201720560612.5U patent/CN206725845U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111694147A (en) * | 2020-06-24 | 2020-09-22 | 深圳珑璟光电技术有限公司 | Eyepiece lens and eyepiece optical system |
| CN111694147B (en) * | 2020-06-24 | 2023-12-08 | 深圳珑璟光电科技有限公司 | Eyepiece lens and eyepiece optical system |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |