CN204389720U - A kind of lens and comprise the camera lens of these lens - Google Patents

Abstract

The utility model discloses a kind of lens and comprise the camera lens of these lens.Described lens are applicable to the camera lens of head mounted display, and two minute surfaces of described lens are respectively the aspherical mirror of evagination; Wherein, the radius-of-curvature absolute value of a described aspherical mirror, is less than the radius-of-curvature absolute value of aspherical mirror described in another; Described camera lens is made up of single element lens.By using the utility model, reducing camera lens price, compression camera lens volume, improving camera lens portability; Further, on the basis of Functional Requirement meeting head mounted display, provide large exit pupil diameter, when uncomfortable interpupillary distance, meet human eye viewing demand, user more easily uses head-mounted display, and viewing effect is better.

Description

A kind of lens and comprise the camera lens of these lens

Technical field

The utility model relates to optical lens field, particularly relates to a kind ofly have the lens of two aspherical mirrors and comprise camera lens and the head mounted display of these lens.

Background technology

The one of wear-type visual device (Head Mount Display) head virtual display, also known as glasses type displayer, with oneself movie theatre.A kind of popular call because the outer image glasses of glasses type displayer, again can for the video image of large screen display audio/video player, thus the address of image its be video eyeglasses (video glasses).Video eyeglasses is military upper demand at first and is applied to military.Current video eyeglasses is just as the stage originally residing for mobile telephone mobile phone and status, and following when 3C merges great development, it will obtain very swift and violent development.

At present, the type of head-mounted display is more, but be mostly made up of camera lens and display, the image of display emits beam, light comes together in the eye of wearer via camera lens, wearer receives imaging after light, become image by the point of intersection of the reverse extending line of image light, be namely positioned at the rear position of display.For realizing said process, described camera lens at least needs to have the function controlling main optical angle and control field angle, and mostly current lens are spherical lens, single spherical lens cannot realize above-mentioned functions simultaneously, for this reason, the camera lens that existing at least two panels lens are formed, makes the on the high side of lens and head mounted display, result also in its volume cannot compress further, portability is poor.

Meanwhile, wearing three-dimensional viewing equipment with regard to what existing market occurred, is also exactly mobile phone and the equipment worn optical devices and combine substantially; Because display screen is carrier with mobile phone, not only the pixel of mobile phone display screen own has limitation, and when 3D split screen shows, the technical display effect maximal value that can reach be also only the half of mobile phone resolution, such as mobile phone screen is 1080P, the split screen 3D display effect maximal value reached is also only 540P, and namely the 3D HD video experience effect of user will be had a greatly reduced quality.Simultaneously, due to the limitation of mobile phone screen size itself, mobile phone is when the two picture of 3D split screen display 16:9, the utilization factor of inevitable mobile phone screen is lower, the tv screen of the shuangping san in mobile phone is also smaller, it also will directly cause virtual screen in 3D viewing process relatively little, the weak points such as feeling of immersion is low.

Utility model content

The utility model provides a kind of lens and comprises camera lens and the head mounted display of these lens, is designed by single element lens, not enough for solving field of view angle, the problems such as portability difference; Meanwhile, by independent shuangping san, allow Consumer's Experience high definition 3D visual effect.

In order to realize above-mentioned utility model object, the utility model provides a kind of lens, and described lens are applicable to the camera lens of head mounted display, and two minute surfaces of described lens are respectively the aspherical mirror of evagination;

Wherein, the radius-of-curvature absolute value of a described aspherical mirror, is less than the radius-of-curvature absolute value of aspherical mirror described in another;

The shape of described two aspherical mirrors meets following formula respectively,

$z=r^2/R(1+\sqrt{1-(K+1)r^2/R^2})+{\mathrm{Ar}}^4+{\mathrm{Br}}^6+{\mathrm{Cr}}^8+{\mathrm{Dr}}^{10}+{\mathrm{Er}}^{12}+{\mathrm{Fr}}^{14}+{\mathrm{Gr}}^{16}+{\mathrm{Hr}}^{18}+{\mathrm{Jr}}^{20}$ Wherein:

Z, for for referencial use apart from optical axis with surface fixed point in r position along optical axis direction;

R is radius-of-curvature;

R is described lens height;

K is circular cone coefficient;

A, B, C, D, E, F, G, H, J, be respectively the asphericity coefficient of every time.

The utility model provides a kind of camera lens simultaneously, and described camera lens is applicable to head mounted display, and described camera lens is made up of single element lens, and two minute surfaces of described lens are respectively the aspherical mirror of evagination;

Wherein, the radius-of-curvature absolute value of a described aspherical mirror, is less than the radius-of-curvature absolute value of aspherical mirror described in another;

The shape of described two aspherical mirrors meets following formula respectively,

$z=r^2/R(1+\sqrt{1-(K+1)r^2/R^2})+{\mathrm{Ar}}^4+{\mathrm{Br}}^6+{\mathrm{Cr}}^8+{\mathrm{Dr}}^{10}+{\mathrm{Er}}^{12}+{\mathrm{Fr}}^{14}+{\mathrm{Gr}}^{16}+{\mathrm{Hr}}^{18}+{\mathrm{Jr}}^{20}$ Wherein:

Z, for for referencial use apart from optical axis with surface fixed point in r position along optical axis direction;

R is radius-of-curvature;

R is described lens height;

K is circular cone coefficient;

A, B, C, D, E, F, G, H, J, be respectively the asphericity coefficient of every time.

The utility model further provides a kind of head mounted display, and this head mounted display comprises camera lens and display device, and described camera lens and described display device are positioned at same optical axis,

Described display device, comprises two independent display modules further;

Described camera lens is made up of single element lens, and two minute surfaces of described lens are respectively the aspherical mirror of evagination.

Preferably, in above-mentioned head mounted display,

Described two independent display modules are left-right situs, wherein,

Left display module, for showing left-eye image;

Right display module, for showing eye image.

Preferably, in above-mentioned head mounted display,

The size of described display module, for presetting;

The display screen of described display module, including but not limited to, LCDs LCD, light-emitting diode tube display screen LED and organic light emitting diode display screen OLED.

Preferably, in above-mentioned head mounted display,

Described display module, comprises further, indicative control unit;

Described indicative control unit, for controlling the screen display of display module.

Preferably, in above-mentioned head mounted display,

In two aspherical mirrors of described lens, the radius-of-curvature absolute value of a described aspherical mirror, is less than the radius-of-curvature absolute value of aspherical mirror described in another;

The shape of described two aspherical mirrors meets following formula respectively,

$z=r^2/R(1+\sqrt{1-(K+1)r^2/R^2})+{\mathrm{Ar}}^4+{\mathrm{Br}}^6+{\mathrm{Cr}}^8+{\mathrm{Dr}}^{10}+{\mathrm{Er}}^{12}+{\mathrm{Fr}}^{14}+{\mathrm{Gr}}^{16}+{\mathrm{Hr}}^{18}+{\mathrm{Jr}}^{20}$

Wherein,

Z, for for referencial use apart from optical axis with surface fixed point in r position along optical axis direction;

R is radius-of-curvature;

R is described lens height;

K is circular cone coefficient;

A, B, C, D, E, F, G, H, J, be respectively the asphericity coefficient of every time.

Preferably, in above-mentioned head mounted display,

Human eye is relative to the light shaft offset amount of described camera lens, and its effective range is 0mm to 4mm.

Preferably, in above-mentioned head mounted display,

The left eye optical system be made up of camera lens and left display module, has the visual angle from 40 to 110 degree, and forms the virtual image of left-eye image;

The right eye optical system be made up of camera lens and right display module, has the visual angle from 40 to 110 degree, and forms the virtual image of eye image;

Preferably, in above-mentioned head mounted display,

Left eye optical system forms the amplification virtual image of 1124 inches of the left-eye image of distance left eye 10 meters or more; And,

Right eye optical system forms the amplification virtual image of 1124 inches of the eye image of distance right eye 10 meters or more.

Compared with prior art, the utility model beneficial effect is as follows:

By using lens provided by the utility model and comprising camera lens and the head-mounted display of these lens, can realize, be met the Functional Requirement of Large visual angle head mounted display camera lens by single element lens; Can realize, on the basis meeting lens function requirement, reduce camera lens price, compression camera lens volume, improve camera lens portability; Can realize further, on the basis of Functional Requirement meeting head mounted display, provide large exit pupil diameter, when uncomfortable interpupillary distance, meet human eye viewing demand, user more easily uses head-mounted display, and viewing effect is better.

Accompanying drawing explanation

Fig. 1 is the structural principle composition of a kind of lens of the utility model embodiment;

Fig. 2 is the optical schematic diagram of a kind of head mounted display of the utility model embodiment;

Fig. 3 is the structural representation of a kind of head mounted display of the utility model embodiment;

Fig. 4 is Fig. 3 explosive view;

Fig. 5 is the curvature of field figure of human eye alignment optical center lens described in the utility model embodiment;

Fig. 6 is the distortion figure of human eye alignment optical center lens described in the utility model embodiment;

Fig. 7 departs from the point range figure of optical centre 4mm lens for human eye described in the utility model embodiment;

Fig. 8 departs from the optical structure chart of optical centre 4mm lens for human eye described in the utility model embodiment;

Fig. 9 is the optical structure chart at human eye alignment optical center described in the utility model embodiment;

Figure 10 is the point range figure of human eye alignment optical center lens described in the utility model embodiment;

Figure 11 is virtual image schematic diagram described in the utility model embodiment.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on embodiment of the present utility model, those of ordinary skill in the art, in the every other embodiment not having to obtain under creative work, belong to the scope of the utility model protection.

Lens embodiment

The utility model embodiment discloses a kind of lens, described lens are applicable to the camera lens of head mounted display, two minute surfaces of described lens are respectively the aspherical mirror of evagination, for ease of describing, as shown in fig. 1, two aspherical mirrors are respectively the first aspherical mirror 11 and the second aspherical mirror 12.

When described lens 11 are for forming the camera lens of head mounted display: described first aspherical mirror 11, towards human eye, for adjusting field angle, is namely substituted in existing camera lens by described first aspherical mirror 11, be mainly used in the independent lens controlling field angle; Described second aspherical mirror 12, towards display, is namely substituted in existing camera lens by described second aspherical mirror 12, is mainly used in the independent lens controlling main optical angle.Namely based on this, described lens of the present utility model, it uses as camera lens separately, and also camera lens is made up of lens described in monolithic, can complete the demand for control of camera lens for field angle and main optical angle.

In the utility model embodiment, for realizing camera lens that lens described in monolithic the meet head mounted display Functional Requirement for field angle and main optical Angle ambiguity, the radius-of-curvature absolute value of described lens aspherical mirror described in one of them, is less than the radius-of-curvature absolute value of aspherical mirror described in another.See Fig. 1, the radius-of-curvature of described first aspherical mirror is R1, R1>0, and unit is mm; The radius-of-curvature of described second aspherical mirror is R2, R2<0, then :-R2<R1, R2<0 represents that the direction that second face type is bending is contrary with radiation direction, the span-25<R2<-20 of R2; R2 is-21.296 in the present embodiment.

Described in the utility model embodiment, the shape of two aspherical mirrors meets following formula respectively,

$z=r^2/R(1+\sqrt{1-(K+1)r^2/R^2})+{\mathrm{Ar}}^4+{\mathrm{Br}}^6+{\mathrm{Cr}}^8+{\mathrm{Dr}}^{10}+{\mathrm{Er}}^{12}+{\mathrm{Fr}}^{14}+{\mathrm{Gr}}^{16}+{\mathrm{Hr}}^{18}+{\mathrm{Jr}}^{20}$ Wherein:

Z, for for referencial use apart from optical axis with surface fixed point in r position along optical axis direction;

R is radius-of-curvature;

R is described lens height;

K is circular cone coefficient;

A, B, C, D, E, F, G, H, J, be respectively the asphericity coefficient of every time.

Different head mounted displays has different requirements for the functional parameter of camera lens, man-hour is added in design, according to the asphericity coefficient that deviser provides, and wherein thick, the parameter such as limit is thick, external diameter, the shape of two described aspherical mirrors of these lens can be determined accurately.

Camera lens embodiment

The utility model example provides a kind of camera lens, and described camera lens is applicable to head mounted display, and the camera lens of the present embodiment is made up of single element lens.

Specifically, in this embodiment, described camera lens is made up of single element lens, and described lens are identical with the described lens in aforesaid lens embodiment, no longer repeated description.

See Fig. 1, described first aspherical mirror 11 towards human eye, for controlling field angle; Described second aspherical mirror 12 towards display, for controlling main optical angle.Based on this, this camera lens adopts lens described in monolithic to form, and can realize the Functional Requirement controlling field angle and main optical angle etc., and than the existing camera lens be made up of at least two panels lens, the cost of camera lens of the present utility model is lower, volume is less.

Head mounted display embodiment

See Fig. 3-Fig. 4, present embodiment discloses a kind of head mounted display.

Fig. 2 is the optical schematic diagram of this head mounted display, and Fig. 4 is the principle assumption diagram of this head mounted display, and specifically, this display comprises camera lens 2 and display device 4, and described camera lens and described display device are positioned at same optical axis; Described display device, comprises two independent display modules further; Described camera lens is made up of single element lens, and two minute surfaces of described lens are respectively the aspherical mirror of evagination.

When two independent display modules of a kind of head mounted display of the present embodiment embodiment are left-right situs, as shown in Figure 4, left display module 4L and right display module 4R; Described left display module 4L, for showing left-eye image; Described right display module 4R, for showing eye image.The size of described display module, for presetting, its range of size is preferred, can be 0.4 inch to 7 inches.The display screen of described display module, including but not limited to, LCDs LCD, light-emitting diode tube display screen LED and organic light emitting diode display screen OLED.Independently display module, according to actual product and the display demand such as video display broadcasting or game, can be set to the different proportion sizes such as 16:9,4:3, improve the utilization factor of screen during screen-Customize; Double screen independently shows simultaneously, and 3D dual image of having agreed with that can be fabulous shows requirement, improves 3D display resolution, can let user experiencing high definition 3D visual effect; Effectively prevent the display of single-screen dual image and reduce the display pixel of video display or game, the virtual screen display effect causing human eye to experience owes clear, experiences poor consequence.Described display module, comprises further, indicative control unit; Described indicative control unit, for controlling the screen display of display module.

The optical schematic diagram of a kind of head mounted display of Fig. 2 the utility model embodiment.In order to better understand the utility model embodiment, first, be described down for three-dimensional imaging principle:

Why the vision of people can differentiate distance, is the gap by two eyes.Two of people separately about 5 centimeters, two eyes are except aiming at dead ahead, and see any the same thing, the angle of two all can not be identical.Although gap is very little, pass in brain through retina, brain, just by this small gap, produces the far and near degree of depth, thus produces stereoscopic sensation.Although eyes can see object, the distance of object distance is not easily differentiated.According to this principle, if same image, produce two images by the gap at two eyes visual angles, then allow two eyes one, respective eyeball see the image on oneself one side, brain just can be made to produce the stereoscopic sensation of the depth of field through retina.

In Fig. 4, the image of independent display module 4L and 4R enters left eye and the right eye of people by camera lens; Namely human eye is it is seen that be imaged on the amplification virtual image of a distance, human eye front after camera lens, can enjoy the effect of the large-size screen monitors high definition 3D at movie theatre viewing film.

Namely head mounted display shows left-eye image and eye image on separate screens, can watch stereo-picture to make the eyes of user by synthesizing two screens.On left eye and right eye display module 4L and 4R, the image of display becomes the virtual image of amplification via camera lens.When virtual image focuses on the retina of right and left eyes, they enter brain as independent item of information, and in brain, be combined as a stereo-picture.

Concrete, described camera lens is made up of single element lens, and described first aspherical mirror 11 is towards human eye, and described second aspherical mirror 12 is towards display device.The light of described display device is first through described second aspherical mirror 12, the adjustment of main optical angle is carried out through described second aspherical mirror 12, then inject described lens penetrated by described first aspherical mirror 11 and entered human eye again, human eye sight is first through described first aspherical mirror 11, described first aspherical mirror 11 pairs of field angle adjust, then through the imaging after described lens, the rear of described display device is positioned at.

Described lens are identical with the described lens in aforesaid lens embodiment, that is, described lens meet:

1, two minute surfaces of described lens are respectively the aspherical mirror of evagination, i.e. the first aspherical mirror 11 and the second aspherical mirror 12;

2, the absolute value of the radius of curvature R 1 of described first spherical mirror surface 11, is greater than the absolute value of the radius of curvature R 2 of described second aspherical mirror 12;

3, two described aspherical mirrors meet following formula respectively,

$z=r^2/R(1+\sqrt{1-(K+1)r^2/R^2})+{\mathrm{Ar}}^4+{\mathrm{Br}}^6+{\mathrm{Cr}}^8+{\mathrm{Dr}}^{10}+{\mathrm{Er}}^{12}+{\mathrm{Fr}}^{14}+{\mathrm{Gr}}^{16}+{\mathrm{Hr}}^{18}+{\mathrm{Jr}}^{20}$

Wherein:

Z, for for referencial use apart from optical axis with surface fixed point in r position along optical axis direction;

R is radius-of-curvature;

R is described lens height;

K is circular cone coefficient;

A, B, C, D, E, F, G, H, J, be respectively the asphericity coefficient of every time.

Following table one, for a certain model head mounted display is for the special parameter requirement of camera lens, also be, the lens of this camera lens, following data are adopted respectively for radius-of-curvature (R), height square value (r), circular cone coefficient (K) and every secondary asphericity coefficient (A, B, C, D, E, F, G, H, J) parameter value, and on this basis, in conjunction with the shape need of two reverse evaginations of described aspherical mirror with-R2<R1, the shape of two described aspherical mirrors of these lens can be determined accurately;

Table one

In an embodiment, two asphericity coefficients are in Table 1:r=0-19.7mm

	S1	S2
			R	85.258	-21.296
K	3.36493	-1.03252
			A	-4.469e-6	5.266e-6
B	7.7577e-9	-4.107e-8
			C	-7.137e-12	9.094e-11
D	1.706e-15	-6.242e-14
			E	0	0
F	0	0

[0109]

H	0	0
			G	0	0

For the head mounted display of this model, through test, its curvature of field figure is see Fig. 5, and figure is see Fig. 6 in its distortion, its point range figure is see Fig. 7, respectively for wavelength 700nm in figure, 546.1nm, 435.8nm analyze, known by the analysis result shown in figure, the curvature of field of the head mounted display of this model, within 10mm, distorts within 40%, and spot radius RMS is less than 0.55mm.Therefore, the head mounted display of this model, the camera lens be made up of single element lens adopted, meets the parameters index of head mounted display completely.And on this basis, make the cost of described head mounted display lower, volume compresses further, has better portability.

See Fig. 8-Figure 11, head mounted display of the present utility model, adopts the camera lens be made up of single element lens to meet head mounted display completely for the requirement with certain light shaft offset amount.Wherein:

Fig. 8 shows optical schematic diagram during light shaft offset 4mm, corresponds, when Fig. 7 shows light shaft offset 4mm, and the point range figure that institute's test analysis goes out.

Fig. 9 shows optical schematic diagram during light shaft offset 0mm, when Figure 10 shows light shaft offset 0mm, and the point range figure that institute's test analysis goes out.

From the result analyzed shown in figure, when departing from optical axis 0mm and 4mm, the RMS radius point of this model head mounted display is less than 0.55mm, meets the quality requirements of head mounted display.Separately, human eye interpupillary distance is generally about 4mm, and therefore, the effective range value 0mm to 4mm of light shaft offset amount, enough tackles the use habit of user.

Simultaneously, in the utility model embodiment, viewing angle scope is that-55 degree are to 55 degree, corresponding viewing angle parameter is set particular by optical design software, then Optimum Design Results, the spot size of each viewing angle is shown in point range figure 7 and Figure 10, Fig. 5 and Fig. 6 is shown in the curvature of field and distortion, in an embodiment, eye-observation scope is the border circular areas of diameter 13mm.See Fig. 8, radius is 6.5mm; In this example, the eye pupil size of simulation people is diameter 5mm, see Fig. 9, when human eye aims at lens center, simulation human eye receives the optical texture schematic diagram of light as Fig. 9, when human eye departs from optical axis 4mm, it meets the designing requirement of 13mm range of observation, simulation human eye receives the optical texture schematic diagram of light as Fig. 8, and when human eye departs from optical axis 4mm, the point range figure of camera lens is shown in Fig. 7; Find out in 13mm viewing area from point range figure 7 and Figure 10, viewing angle scope for-55 degree to 55 degree time, the scenery seen will be very clear.

See in Figure 11 the utility model embodiment, when viewing angle α is 55 degree, can reaches and be equivalent to the screen that 10 meters are far seen 1124 inches; The computation process of specific implementation is:

Virtual image size=2x10x1000xtg α/25.4=2x10x1000xtg55 °/25.4=1124 inch

Obviously, those skilled in the art can carry out various change and modification to the utility model and not depart from spirit and scope of the present utility model.Like this, if these amendments of the present utility model and modification belong within the scope of the utility model claim and equivalent technologies thereof, then the utility model is also intended to comprise these change and modification.

Claims (2)

1. lens, described lens are applicable to the camera lens of head mounted display, it is characterized in that:

Two minute surfaces of described lens are respectively the aspherical mirror of evagination;

Wherein, the radius-of-curvature absolute value of a described aspherical mirror, is less than the radius-of-curvature absolute value of aspherical mirror described in another;

The shape of described two aspherical mirrors meets following formula respectively,

Wherein:

Z, for for referencial use apart from optical axis with surface fixed point in r position along optical axis direction;

R is radius-of-curvature;

R is described lens height;

K is circular cone coefficient;

A, B, C, D, E, F, G, H, J, be respectively the asphericity coefficient of every time.

2. a camera lens, described camera lens is applicable to head mounted display, it is characterized in that, described camera lens is made up of single element lens, and two minute surfaces of described lens are respectively the aspherical mirror of evagination;

Wherein, the radius-of-curvature absolute value of a described aspherical mirror, is less than the radius-of-curvature absolute value of aspherical mirror described in another;

The shape of described two aspherical mirrors meets following formula respectively,

Wherein:

Z, for for referencial use apart from optical axis with surface fixed point in r position along optical axis direction;

R is radius-of-curvature;

R is described lens height;

K is circular cone coefficient;

A, B, C, D, E, F, G, H, J, be respectively the asphericity coefficient of every time.