CN106773010A

CN106773010A - A kind of 2P structures camera lens, wear display optical system and helmet

Info

Publication number: CN106773010A
Application number: CN201611064600.XA
Authority: CN
Inventors: 杨春
Original assignee: Goertek Techology Co Ltd
Current assignee: Goertek Optical Technology Co Ltd
Priority date: 2016-11-28
Filing date: 2016-11-28
Publication date: 2017-05-31
Anticipated expiration: 2036-11-28
Also published as: CN106773010B; WO2018094851A1

Abstract

The present invention discloses a kind of 2P structures camera lens, wears display optical system and helmet, the 2P structures camera lens includes first convex lens and the second convex lens of biconvex of the plano-convex set gradually against light incident direction, first convex lens include first surface and second surface, first surface is the plane for being close to diaphragm, and diaphragm is located at human eye pupil；Second surface is be convex to object space aspherical；The radius of curvature R 1=0 of first surface, the radius of curvature R 2 of second surface<0；Second convex lens include the 3rd surface and the 4th surface, and the 3rd surface and the 4th surface are aspherical, and the 3rd surface is simultaneously convex to diaphragm near the second surface of the first convex lens, and the 4th surface is convex to object space；The radius of curvature R 4 on the surface of radius of curvature R 3 and the 4th on the 3rd surface：R3<‑R4.Technical scheme causes that the face type of camera lens module monolithic eyeglass is more easily controlled shaping, and the correction for MTF, SPOT aberration is more preferable, while obtaining the big angle of visual field.

Description

A kind of 2P structures camera lens, wear display optical system and helmet

Technical field

The present invention relates to eyepiece lens technology field, and in particular to a kind of 2P structures camera lens, wear display optical system and Helmet.

Background technology

In recent years, with the progress of scientific and technological industry, 3D technology is able to development rapidly and extensively, increasing video display and Game is all based on the simulation of real scenes of VR (Vatual Reality, virtual reality) technology, and requires effect shake true to nature Shake；So that head-mounted display has good development prospect in entertainment field first as a kind of emerging technology, its two dimension The picture of plane is presented to user with more three-dimensional image so that user produces sense of reality on the spot in person.

The eyepiece camera lens of existing VR equipment, is confined to the imaging system of small field of view more, its camera lens FOV (Field of View, visual field) 100 ° are less than, when user observes scene using equipment, may feel that there is obvious border, it is impossible to meet game Some high-end users of field pursue the requirement of the feeling of immersion of VR, and Consumer's Experience then depends primarily on the angle of visual field of eyepiece, therefore, The eyepiece camera lens of existing VR equipment has that the angle of visual field is small, Consumer's Experience is not good.

The content of the invention

The invention provides a kind of 2P (2pieces, two panels) structure camera lens, display optical system and helmet are worn, To solve the problems, such as that the angle of visual field using imaging system its camera lens of small field of view is small, Consumer's Experience is not good.

According to an aspect of the invention, there is provided a kind of 2P structures camera lens, including set successively against light incident direction The first convex lens and the second convex lens put, the first convex lens are planoconvex spotlight, and the second convex lens are biconvex lens；

First convex lens include first surface and second surface, and first surface is the plane for being close to diaphragm, and diaphragm is located at people At eye pupil hole；Second surface is be convex to object space aspherical；The radius of curvature R 1 of first surface and the radius of curvature of second surface R2 meets relationship below respectively：R1=0, R2<0；

Second convex lens include the 3rd surface and the 4th surface, and the 3rd surface and the 4th surface are aspherical, the 3rd table Face is close to the second surface of the first convex lens and is convex to diaphragm, and the 4th surface is convex to object space；The radius of curvature R 3 on the 3rd surface with The radius of curvature R 4 on the 4th surface meets relationship below：R3<-R4.

According to another aspect of the present invention, there is provided one kind wears display optical system, this wears display optical system Include successively against light incident direction：The 2P structure camera lenses of diaphragm, such as one aspect of the present invention, and display, diaphragm At human eye pupil, display is located at object space.

According to a further aspect of the invention, there is provided a kind of helmet, the head of bag such as another aspect of the present invention Wear display optical system.

The beneficial effects of the invention are as follows：This 2P structures camera lens of the invention, first, whole group camera lens includes two panels lens, Wherein a piece of is aspherical planoconvex spotlight, and another is aspherical biconvex lens, and on planoconvex spotlight first surface song Rate radius R1 meets relationship below respectively with the radius of curvature R 2 of second surface：R1=0, R2<0, the 3rd table on biconvex lens The radius of curvature R 4 on the surface of radius of curvature R 3 and the 4th in face meets relationship below：R3<- R4, the 2P structures cause camera lens mould The face type of group monolithic eyeglass is more easily controlled shaping, for MTF (Modulation Transfer Function, modulation transmission Function), the correction of the aberration such as SPOT (hot spot) more preferably, while be obtained in that 120 ° of the big angle of visual field, can be used as high-performance version This head-mounted display eyepiece；Secondly, its manufacturing cost and weight are all substantially reduced.

In addition, wear display optical system and helmet present invention also offers one kind, it can not only meet and regards greatly The need for the VR of rink corner, more enable to user to obtain more preferable feeling of immersion, so as to provide preferably Consumer's Experience, improve product Competitiveness.

Brief description of the drawings

Fig. 1 is a kind of structural representation of 2P structures camera lens of one embodiment of the invention；

Fig. 2 is a kind of working condition optical schematic diagram of 2P structures camera lens of one embodiment of the invention；

Fig. 3 is a kind of initial configuration schematic diagram of 2P structures camera lens of one embodiment of the invention；

Optical texture when Fig. 4 is a kind of recipient deviation optical axis 0mm of 2P structures camera lens of one embodiment of the invention Figure；

Fig. 5 is a kind of curvature of field figure of 2P structures camera lens of one embodiment of the invention；

Fig. 6 is a kind of distortion figure of 2P structures camera lens of one embodiment of the invention；

Fig. 7 is a kind of point range figure of 2P structures camera lens of one embodiment of the invention；

Fig. 8 is a kind of chromaticity difference diagram of 2P structures camera lens of one embodiment of the invention；

Schematic diagram when Fig. 9 is a kind of recipient deviation optical axis -2mm of 2P structures camera lens of one embodiment of the invention；

Schematic diagram when Figure 10 is a kind of recipient deviation optical axis 2mm of 2P structures camera lens of one embodiment of the invention.

Specific embodiment

A kind of prior art of the eyepiece camera lens of VR equipment is：Include successively along light incident direction：Preceding group with after Group, preceding group includes the first negative lens and the second positive lens, and group includes a similar balsaming lens group afterwards：3rd positive lens and the 4th Negative lens, the first negative lens has and is convex to the first surface of object space and concave towards the second surface of image space, positioned at the top of camera lens, the Two positive lens have and concave towards the 3rd surface of object space and be convex to the 4th surface of image space, and the 3rd positive lens has and is convex to the of object space Five surfaces and the 6th surface of image space is convex to, the 4th negative lens has and concaves towards the 7th surface of object space and concave towards the 8th table of image space Face.But, the imaging system of small field of view is confined to this technology more, FOV is smaller for its camera lens, and user observes scene using equipment When, may feel that there is obvious border, it is impossible to meet the requirement of the feeling of immersion of field of play some high-end users pursuit VR, and Consumer's Experience then depends primarily on the angle of visual field of eyepiece, therefore, the eyepiece camera lens of existing VR equipment has that the angle of visual field is small, uses Not good problem is experienced at family, meanwhile, also there is complex structure, the face type of camera lens module monolithic eyeglass is not easy to control shaping, nothing Method realizes the correction to aberrations such as MTF, SPOT, is more expensive to manufacture, and the larger problem of weight.

Design concept of the invention is：Have that the angle of visual field is small, Consumer's Experience for the eyepiece camera lens of existing VR equipment Not good problem, meanwhile, also there is complex structure, the face type of camera lens module monolithic eyeglass is not easy to control shaping, it is impossible to realize Correction to aberrations such as MTF, SPOT, is more expensive to manufacture, and the larger problem of weight, and camera lens of the invention uses two panels convex lens Mirror, wherein a piece of convex lens are proximate to the planoconvex spotlight of diaphragm, a piece of convex lens are proximate to the biconvex lens of object space in addition；Plano-convex Lens are planes near the surface of diaphragm, its radius of curvature R 1=0, planoconvex spotlight be by sublenticular surface it is aspherical, Its radius of curvature R 2<0；Two surfaces of biconvex lens are aspherical, and the radius of curvature on two surface meets following respectively Relational expression：R3<-R4.So, the need for technical scheme can not only meet big angle of visual field VR, 120 ° big can be obtained The angle of visual field so that user is obtained in that more preferable feeling of immersion, while so that the face type of camera lens module monolithic eyeglass it is easily controllable into Type, the correction to aberrations such as MTF, SPOT is more preferable, and manufacturing cost is lower, and weight is greatly reduced, and can improve Consumer's Experience, improves The competitiveness of product.

Embodiment one

Fig. 1 is a kind of working condition optical schematic diagram of 2P structures camera lens of one embodiment of the invention, referring to Fig. 1, should 2P structures camera lens includes the first convex lens L1 and the second convex lens L2 that are set gradually against light incident direction, the first convex lens L1 is planoconvex spotlight, and the second convex lens L2 is biconvex lens；

First convex lens L1 includes first surface S1 and second surface S2, and first surface S1 is the plane for being close to diaphragm, light Door screen is at the pupil of human eye 11；Second surface S2 is be convex to object space 12 aspherical；The radius of curvature R 1 of first surface S1 with The radius of curvature R 2 of second surface S2 meets relationship below respectively：R1=0, R2<0；

Second convex lens L1 includes the 3rd surface S3 and the 4th surface S4, and the 3rd surface S3 and the 4th surface S4 are aspheric Face, the 3rd surface S3 is close to the second surface S2 of the first convex lens L1 and is convex to diaphragm, and the 4th surface S4 is convex to object space 12；3rd The radius of curvature R 4 of the surface S4 of radius of curvature R 3 and the 4th of surface S3 meets relationship below：R3<-R4.

The structural representation of 2P structure camera lenses as shown in Figure 1, and the 2P structure camera lenses shown in Fig. 2 working condition optics Schematic diagram understands that the 2P structure camera lenses in the present embodiment, object space 12 is set to display, and the image on display emits beam, Camera lens is injected via the 4th surface S4 of the second convex lens L2, camera lens is then projected by the first surface S1 of the first convex lens L1, Be imaged into human eye 11, but the image seen in human eye 11 position not at location of displays, but from the first table Face S1 enters the point of intersection of the reverse extending line of the light of human eye, i.e., at the position of imaging surface 13.So, the technical side of the present embodiment The need for case can not only meet big angle of visual field VR so that user is obtained in that more preferable feeling of immersion, while to MTF, SPOT etc. The correction of aberration more preferably, can improve Consumer's Experience, improve the competitiveness of product.

Embodiment two

Explanation that emphasis is carried out to the focal length of the two panels convex lens of 2P structure camera lenses in the present embodiment, other guide referring to Other embodiment of the invention.A kind of specific implementation of the 2P structure camera lenses is as follows：

The focal length f2 of the focal length f1 of the first convex lens L1 and the second convex lens L2 meets relationship below：

f2>10×f1。

It should be noted that in the present embodiment, the second convex lens L2 assume responsibility for most focal power.So, this implementation The technical scheme of example enables to the structure of camera lens compacter, reduces the overall volume of camera lens, is conducive to 2P of the invention to tie The real popularization and application of structure camera lens and lifting Consumer's Experience.

Embodiment three

Be emphasis in the present embodiment further illustrating to the focal length of the second convex lens L2 of 2P structure camera lenses, other guide Referring to other embodiment of the invention.A kind of specific implementation of the 2P structure camera lenses is as follows：

The focal length f2 of the focal length f1 of the first convex lens L1 and the second convex lens L2 also further meets relationship below：

100mm<f2<150mm, 12mm<f1<14mm.

It should be noted that in the present embodiment, the second convex lens L2 assume responsibility for most focal power, so, this implementation The technical scheme of example on the basis of the overall volume of camera lens as far as possible further such that the structure of camera lens is compacter, is reduced, and The difficulty of processing of eyeglass is reduced as far as possible, so as to be more beneficial for real popularization and application and the lifting user of 2P structures camera lens of the invention Experience, advantageously reduces cost, and improve yield rate again.

Example IV

It is two radius of curvature of non-spherical surface of the emphasis to the second convex lens L2 of 2P structure camera lenses in the present embodiment Further illustrate, other guide is referring to other embodiment of the invention.A kind of specific implementation of the 2P structure camera lenses is such as Under：

The radius of curvature R 4 on the surface of radius of curvature R 3 and the 4th on the 3rd surface of the second convex lens L2 further meet with Lower relational expression：

R3>0, R4<0, -200mm<R3<-R4<200mm.

It should be noted that in the present embodiment, the second convex lens L2 further undertakes more focal powers, while so that The 3rd surface S3 and the 4th surface S4 of two convex lens L2 are more easily processed and maked corrections, so, the technical scheme of the present embodiment Further such that the structure of camera lens is compacter, reduce the overall volume of camera lens, while reducing the difficulty of processing of eyeglass, improve The crudy and yield rate of eyeglass, so that advantageously in the market competitiveness for improving 2P structures camera lens of the invention.

Embodiment five

It is the material of two panels convex lens and the further illustrating of technique of the emphasis to 2P structure camera lenses in the present embodiment, other Content is referring to other embodiment of the invention.A kind of specific implementation of the 2P structure camera lenses is as follows：

First convex lens L1 and the second convex lens L2 uses COP (Cyclo-olefin polymer) optical plastic material It is made with Shooting Technique production.

It should be noted that in the present embodiment, being compared using COP optical plastics material and using glass material and other low sides The materials such as PMMA (polymethyl methacrylate), PC (resin) so that the camera lens weight of the present embodiment declines to a great extent, and this reality The glass lens for applying example are produced by using Shooting Technique, can be produced in enormous quantities, and stable performance, and cost is relatively low.This Sample, can further reduce the cost of 2P structures camera lens of the invention, improve competitiveness.

Embodiment six

The further illustrating to each surface of the two panels convex lens of 2P structure camera lenses that be emphasis in the present embodiment, in other Hold referring to other embodiment of the invention.A kind of specific implementation of the 2P structure camera lenses is as follows：

The second surface S2 of the first convex lens L1, the 3rd surface S3 of the second convex lens L2 and the 4th surface S4 be satisfied by with Lower even aspheric surface equation formulations:

Wherein, z is that, along the coordinate of optical axis direction, Y is the radial coordinate in units of length of lens unit, and c=1/R, c are Curvature, R is radius of curvature, and k is circular cone coefficient (Coin Constant), α_iIt is the coefficient of each high-order term, 2i is aspherical height Power (the order of Aspherical Coefficient), i=4.

It should be noted that in the present embodiment, the second surface S2 of the first convex lens L1, the 3rd table of the second convex lens L2 Face S3 and the 4th surface S4 are satisfied by above-mentioned even aspheric surface equation formulations, and quadratic term up to 8 powers.

The design of the present embodiment is completed by ZEMAX optical design softwares, and same mentality of designing can also make Completed with CODEV optical design softwares.First, first initial configuration is set up as shown in figure 3, then being built on the basis of initial configuration Vertical evaluation function, purpose of design is reached by adding various operands constraints, and the result of final optimization pass is as shown in Figure 1.

The design result of the present embodiment as shown in Table 1, being shown respectively by object space 12 in table one, the light sequentially numbered Learn surface sequence number (Surface), the radius of curvature (R) of each optical surface on optical axis, imaging surface 13 from object space 12 to image space The distance (T) of each face and latter optical surface on optical axis, as shown in Figure 4, T is the 4th surface S4 for representing the second convex lens L2 To the distance of rear one side (object space 12), circular cone coefficient (Coin Constant) k, and asphericity coefficient α₁、α₂、α₃、α₄。

Table one

surface

R

T

k

α₁

α₂

α₃

α₄

L1-S1

Infinity

12.6762

0.00

L1-S2

-30.3098

1.9943

-6.88E-01

0.00

2.12E-06

-3.41E-09

-1.15E-12

L2-S1

111.2277

12.2932

3.33E+00

0.00

9.34E-07

-5.11E-10

-1.90E-13

L2-S2

-199.2492

31.3000

2.33E+01

0.00

0.00E+00

Visible above, the 2P structures camera lens of the present embodiment can preferably control the item aberration such as MTF, distortion, SPOT, improve Image quality, lifts Consumer's Experience.

Embodiment seven

It is that emphasis is further illustrated to the another kind on each surface of the two panels convex lens of 2P structure camera lenses in the present embodiment, Other guide is referring to other embodiment of the invention.A kind of specific implementation of the 2P structure camera lenses is as follows：

It is aspherical that the second surface of the first convex lens, the 3rd surface of the second convex lens and the 4th surface meet following odd Equation formulations：

Wherein, z is that, along the coordinate of optical axis direction, Y is the radial coordinate in units of length of lens unit, and c=1/R, c are Curvature, R is radius of curvature, and k is circular cone coefficient, β_iIt is the coefficient of each high-order term, i is aspherical power high；I=2N+1, N are Natural number, 1≤N≤8.

It should be noted that equally can also reach purpose of design using above-mentioned odd aspherical equation formula.This implementation The 2P structure camera lenses of example, its curvature of field, distortion, point range figure, MTF can successively referring to shown in Fig. 5, Fig. 6, Fig. 7 and Fig. 8, above-mentioned each figure In be analyzed mainly for reference wavelength green glow (540nm).

Visible above, the 2P structure camera lenses of the present embodiment, its curvature of field distorts within 50% within 10mm, and RMS is ( Root) put less than 0.3mm.Be respectively shown in such as Fig. 9 and Figure 10, the human eye 11 at diaphragm as recipient, be respectively offset from optical axis- During 2mm and 2mm, RMS points are less than 0.45mm.The 2P structure camera lenses, the need for disclosure satisfy that big angle of visual field VR, can obtain 120 ° big The angle of visual field, and with good optical parametric performance.

Embodiment eight

Referring to Fig. 2, this wears display optical system, includes successively against light incident direction：Diaphragm, such as embodiment one to 2P structure camera lenses any one of embodiment seven, and display, diaphragm are located at the pupil of human eye 11, and display is located at Object space 12.

It should be noted that the embodiment wears display optical system and can also wear fixed component and formed by setting Helmet, wearing fixed component can be preferably fixing band or fixed helmet etc., so that the operation of convenient use person and use, Lifting user experience is felt.

Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the scope of the present invention.It is all Any modification, equivalent substitution and improvements made within the spirit and principles in the present invention etc., are all contained in protection scope of the present invention It is interior.

Claims

1. a kind of 2P structures camera lens, including against the first convex lens and the second convex lens that light incident direction sets gradually, its It is characterised by, first convex lens are planoconvex spotlight, second convex lens are biconvex lens；

First convex lens include first surface and second surface, and the first surface is the plane for being close to diaphragm, the light Door screen is located at human eye pupil；The second surface is be convex to object space aspherical；The radius of curvature R 1 of the first surface and institute The radius of curvature R 2 for stating second surface meets relationship below respectively：R1=0, R2<0；

Second convex lens include the 3rd surface and the 4th surface, and the 3rd surface and the 4th surface are aspheric Face, the 3rd surface is close to the second surface of first convex lens and is convex to diaphragm, and the 4th surface is convex to thing Side；The radius of curvature R 3 on the 3rd surface meets relationship below with the radius of curvature R 4 on the 4th surface：R3<-R4.

2. 2P structures camera lens as claimed in claim 1, it is characterised in that the focal length f1 of first convex lens and described second The focal length f2 of convex lens meets relationship below：f2>10×f1.

3. 2P structures camera lens as claimed in claim 2, it is characterised in that the focal length f1 of first convex lens and described second The focal length f2 of convex lens also further meets relationship below：

100mm<f2<150mm, 12mm<f1<14mm.

4. 2P structures camera lens as claimed in claim 1, it is characterised in that the radius of curvature R 3 on the 3rd surface and described The radius of curvature R 4 on four surfaces further meets relationship below：

R3>0, R4<0, -200mm<R3<-R4<200mm.

5. 2P structures camera lens as claimed in claim 1, it is characterised in that first convex lens and second convex lens are adopted Produced with COP optical plastics material and Shooting Technique and be made.

6. 2P structure camera lenses as any one of claim 1-5, it is characterised in that described the of first convex lens It is public that two surfaces, the 3rd surface of second convex lens and the 4th surface are satisfied by following even aspheric surface equation Formula:

z = \frac{{cY}^{2}}{1 + \sqrt{1 - (1 + k) c^{2} Y^{2}}} + Σ_{i = 2}^{N} α_{i} Y^{2 i}

Wherein, z is that, along the coordinate of optical axis direction, Y is the radial coordinate in units of length of lens unit, and c=1/R, c are song Rate, R is radius of curvature, and k is circular cone coefficient, α_iIt is the coefficient of each high-order term, 2i is aspherical power high, i=4.

7. 2P structure camera lenses as any one of claim 1-5, it is characterised in that described the of first convex lens Two surfaces, the 3rd surface of second convex lens and the 4th surface meet following odd aspherical equation formula：

z = \frac{{cY}^{2}}{1 + \sqrt{1 - (1 + k) c^{2} Y^{2}}} + Σ_{i = 1}^{N} β_{i} Y^{i}

Wherein, z is that, along the coordinate of optical axis direction, Y is the radial coordinate in units of length of lens unit, and c=1/R, c are song Rate, R is radius of curvature, and k is circular cone coefficient, β_iIt is the coefficient of each high-order term, i is aspherical power high；I=2N+1, N are certainly So count, 1≤N≤8.

8. one kind wears display optical system, it is characterised in that this wears display optical system against light incident direction successively Including：Diaphragm, the 2P structure camera lenses as any one of claim 1 to 7, and display, the diaphragm are located at human eye At pupil, the display is located at object space.

9. a kind of helmet, it is characterised in that including wearing display optical system described in claim 8.