CN204116715U - A kind of camera lens for wearing display device and helmet - Google Patents

Abstract

The utility model proposes a kind of camera lens for wearing display device, comprising the biconvex lens and plano-concave cylindrical mirror that are arranged side by side; Described biconvex lens is arranged at person of modern times's eye side, and plano-concave cylindrical mirror is arranged at people living in faraway places's eye side; Described biconvex lens comprises aspheric surface I and aspheric surface II, and plano-concave cylindrical mirror comprises aspheric surface III and aspheric surface IV; Described aspheric surface I near human eye, aspheric surface II and aspheric surface III opposed, aspheric surface IV is plane.What adopt the utility model design wears display device, and original displayed image it goes without doing any pre-service, carry out the compression of image Y-direction by optical lens, X-direction size remains unchanged.Thus make aspect ratio be compressed to the ratio of 4:3 by 8:9, be presented on the retina of people.And stationary lens is easy to shaping, MTF and SPOT and LCA aberration are corrected very well, and its manufacturing cost and weight reduce all greatly.

Description

A kind of camera lens for wearing display device and helmet

Technical field

The utility model relates to a kind of camera lens for wearing display device and helmet, is applied to consumer electronics field.

Background technology

Along with the progress of display element device manufacturing industries and the appearance of 3D technology, field of consumer electronics has risen Wearable upsurge, and wears display enters people again sight line as the technology had very early.As the technology being applied to civil area in recent years, head-mounted display towards miniaturization, high-performance, the future development of low cost.Image on micro-display can carry out amplifying and is finally presented on the retina of player by general head-mounted display, the picture of present two dimensional surface with more three-dimensional, more has and impacts sense and bring player, produce the sense of reality on the spot in person.

Some renowned companies have released the head-mounted display of oneself one after another at present, Market reaction is all well and good, especially the product at the Large visual angle angle in VR field is applied in, and in fact general we see these wear display system such as Oculus Rift and SONY Morpheus and need first to do pre-service to image, otherwise image has very serious distortion, picture quality has certain loss through process and needs the image-capable of system end very high like this, while work quantitative change is large, heating is inevitable, and cost is also higher.

Utility model content

In order to solve, the existing camera lens for wearing display device needs first to do pre-service to image, system thermal value is high, the problem that cost is high, the utility model proposes a kind of camera lens for wearing display device and helmet, and is achieved by the following technical solutions:

For wearing a camera lens for display device, comprise the biconvex lens and plano-concave cylindrical mirror that are arranged side by side; Described biconvex lens is arranged at person of modern times's eye side, and plano-concave cylindrical mirror is arranged at people living in faraway places's eye side; Described biconvex lens comprises aspheric surface I and aspheric surface II, and plano-concave cylindrical mirror comprises aspheric surface III and aspheric surface IV; Described aspheric surface I near human eye, aspheric surface II and aspheric surface III opposed, aspheric surface IV is plane.

Further, the radius-of-curvature of described aspheric surface I, aspheric surface II, aspheric surface III and aspheric surface IV is R1, R2, R3 and R4, wherein R1>0, R2<0, R1<-R2<100, R3<0, R4 are infinitely great.

First kind of way, described aspheric surface I, aspheric surface II and aspheric surface III is even aspheric surface.

Further, the surface configuration of described aspheric surface I, aspheric surface II and aspheric surface III meets formula:

$Z=\frac{c{Y}^2}{1+\sqrt{1-(1+k)c^2{Y}^2}}+\underset{i=1}{\overset{N}{\mathrm{\&Sigma;}}}{\mathrm{\&alpha;}}_i{Y}^{2i},$

Wherein z is the coordinate along optical axis direction, and Y is the radial coordinate in units of length of lens unit, and c is curvature, and k is circular cone coefficient, and α i is the coefficient of each high-order term, and 2i is aspheric high power, and N is natural number.

Further, the parameter of described aspheric surface I is that c equals 0.0293, k equals 3.7857, α ₄equal 8.26E-06, α ₆equal 3.64E-08, α ₈equal-5.06E-10; The parameter of described aspheric surface II is that c equals-0.0157, k equals-181.0201, α ₄equal-2.93E-05, α ₆equal 3.29E-07, α ₈equal-4.67E-10; The parameter of described aspheric surface III is that c equals-0.1118, k equals-0.9938, α ₄equal 2.60E-05, α ₆equal-1.59E-07, α ₈equal 4.31E-10; The parameter of described aspheric surface IV is that c equals 0, k equals 0, α ₄equal 0, α ₆equal 0, α ₈equal 0.

Another kind of mode, described aspheric surface I, aspheric surface II and aspheric surface III is odd aspheric surface, and its surface configuration meets formula:

$Z=\frac{c{Y}^2}{1+\sqrt{1-(1+k)c^2{Y}^2}}+\underset{i=1}{\overset{N}{\mathrm{\&Sigma;}}}{\mathrm{\&beta;}}_i{Y}^i,$

Wherein z is the coordinate along optical axis direction, and Y is the radial coordinate in units of length of lens unit, and c is curvature, and k is circular cone coefficient, β _ibe the coefficient of each high-order term, i is aspheric high power is natural number, and N is natural number.

The utility model also provides one to wear display device, comprises above-mentionedly wearing display device camera lens.

Design of the present utility model have employed cylindrical system and distortion correction system, have chosen the horizontal stereoscopic fields of view angular region 60 ° that human eye compares adaptation, reach best viewing effect, and use our modal PMMA as lens materials, weight and cost are obtained for good control, produce stable performance in enormous quantities.

In lens design, there is the emphasis that several are designed, as MTF (a kind of transport function, the curve of this function represents the quality of imaging), spot (disperse, exactly the point of an object space after optical system because the reason of aberration can become the spot of a diffusion), BF is (burnt afterwards, be exactly the distance of last face of system to imager chip), LCA (off-axis chromatic aberration, be off-axis ray RGB reach in image planes height difference cause).The design of the application is optimized above-mentioned parameter and function, makes visual angle broader, and image restoring is true, to the better viewing effect of user.

What adopt the utility model design wears display device, and original displayed image it goes without doing any pre-service, carry out the compression of image Y-direction by optical lens, X-direction size remains unchanged.Thus make aspect ratio be compressed to the ratio of 4:3 by 8:9, be presented on the retina of people.And stationary lens is easy to shaping, MTF and SPOT and LCA aberration are corrected very well, and its manufacturing cost and weight reduce all greatly.

After reading embodiment of the present utility model by reference to the accompanying drawings, other features of the present utility model and advantage will become clearly.

Accompanying drawing explanation

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the optical schematic diagram of existing head-mounted display camera lens work;

Fig. 2 is the optical structure chart of the vertical direction of head-mounted display camera lens in the utility model embodiment 1;

Fig. 3 is the optical structure chart of the utility model head-mounted display Binocular displays;

Fig. 4 is the curvature of field and the distortion figure of the utility model embodiment 1;

Fig. 5 is the point range figure of the utility model embodiment 1;

Fig. 6 is the chromaticity difference diagram of the utility model embodiment 1;

Fig. 7 is the Layout figure of the utility model embodiment 1.

Embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.

Embodiment one:

With reference to figure 1, the utility model is used for a kind of camera lens for wearing display device, comprises the biconvex lens 11 and plano-concave cylindrical mirror 12 that are arranged side by side; Described biconvex lens 11 is arranged at person of modern times's eye side, and plano-concave cylindrical mirror 12 is arranged at people living in faraway places's eye side; Described biconvex lens 11 comprises aspheric surface I 13 and aspheric surface II 14, and plano-concave cylindrical mirror comprises aspheric surface III 15 and aspheric surface IV 16; Described aspheric surface I 13 near human eye, aspheric surface II 14 and aspheric surface III 15 opposed, aspheric surface IV 16 is plane.

The radius-of-curvature of aspheric surface I 13, aspheric surface II 14, aspheric surface III 15 and aspheric surface IV 16 is R1, R2, R3 and R4, wherein R1>0, R2<0, R1<-R2<100, R3<0, R4 are infinitely great.

Aspheric surface I 13 is less than negative aspheric surface II 14, makes positive lens sheet 1 bear more focal power, plays the effect of convergence.

The design load of R3 elected as and be less than 0, aspheric surface III 15 surface shape curves is towards human eye, and image can be compressed so in the Y direction, and aspheric surface IV is designed to plane, and radius-of-curvature is infinitely great, and this is easier to processing and shaping, and while also can better control cost.

By reference to the accompanying drawings specifically, the lens imaging principle of helmet as shown in Figure 1, image on display 20 emits beam, camera lens is injected via 12 faces, then imaging in user's eyes is entered by 11 injection camera lenses, but the position of the image seen in people is not or not display 20 place, but entering the point of intersection of reverse extending line of human eye light, i.e. 30 places from 11 faces.The application's optical texture as shown in Figure 2, comprises the non-spherical lens of 1 biconvex and the cylindrical mirror of 1 plano-concave.During work, display 20 sends image, injects user's eyes become to amplify the virtual image via 12 eyeglasses and 11 eyeglasses.

The lens construction of double-disk makes image have different enlargement ratios in X-direction and Y-direction, and corresponding horizontal field of view angle is 60 °, vertical field angle 45 °.The technical scheme of the application compensates geometric distortion and aberration, the face type of eyeglass is easier to molding control, double-disk structure is better for the correction of the aberrations such as MTF, SPOT, belong to the head-mounted display eyepiece of high-performance version, coordinate the lcd screen of more than 500PPI again, the virtual screen the ratio of width to height arriving human eye is 4:3, makes the Consumer's Experience of HMD more true to nature like this.

In order to items such as better control MTF, distortion, aberration, aspheric surface I 13, aspheric surface II 14 and aspheric surface III 15 adopt even aspheric surface; And for ease of processing and shaping, also can better control cost, aspheric surface IV 16 employing plane. simultaneously

Further, the surface configuration of described aspheric surface I 13, aspheric surface II 14 and aspheric surface III 15 meets formula:

$Z=\frac{c{Y}^2}{1+\sqrt{1-(1+k)c^2{Y}^2}}+\underset{i=1}{\overset{N}{\mathrm{\&Sigma;}}}{\mathrm{\&alpha;}}_i{Y}^{2i},$

Wherein z is the coordinate along optical axis direction, and Y is the radial coordinate in units of length of lens unit, and c is curvature, and k is circular cone coefficient, α _ibe the coefficient of each high-order term, 2i is aspheric high power, and N is natural number.

In design proposal of the present utility model, the parameter of aspheric surface I 13 is that c equals 0.0293, k equals 3.7857, α ₄equal 8.26E-06, α ₆equal 3.64E-08, α ₈equal-5.06E-10; The parameter of aspheric surface II 14 is that c equals-0.0157, k equals-181.0201, α ₄equal-2.93E-05, α ₆equal 3.29E-07, α ₈equal-4.67E-10; The parameter of aspheric surface III 15 is that c equals-0.1118, k equals-0.9938, α ₄equal 2.60E-05, α ₆equal-1.59E-07, α ₈equal 4.31E-10; The parameter of aspheric surface IV 16 is that c equals 0, k equals 0, α ₄equal 0, α ₆equal 0, α ₈equal 0.

The utility model also provides one to wear display device, comprises above-mentionedly wearing display device camera lens.

All in all this embodiment is in the curvature of field within 5mm, distorts within 4%, and RMS point is less than 1mm, and aberration can control within 50 μm.

Distance between camera lens of the present utility model and LCD can adjust according to actual range, BF and MTF needs to adjust and make that BF with MTF between right and left eyes is consistent to be used in actual use.

Concrete optical design software and design process not being limited for the camera lens wearing display device of the present embodiment.

Embodiment two:

The difference of this embodiment and embodiment one is, the aspheric surface I of the present embodiment, aspheric surface II and aspheric surface III are odd aspheric surface, and its surface configuration meets formula:

$Z=\frac{c{Y}^2}{1+\sqrt{1-(1+k)c^2{Y}^2}}+\underset{i=1}{\overset{N}{\mathrm{\&Sigma;}}}{\mathrm{\&beta;}}_i{Y}^i,$

Wherein z is the coordinate along optical axis direction, and Y is the radial coordinate in units of length of lens unit, and c is curvature, and k is circular cone coefficient, β _ibe the coefficient of each high-order term, i is aspheric high power is natural number, and N is natural number.

The above is only preferred embodiment of the present utility model, is not to restriction of the present utility model, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the Equivalent embodiments of equivalent variations.But everyly do not depart from technical solutions of the utility model content, any simple modification, equivalent variations and the remodeling done above embodiment according to technical spirit of the present utility model, still belong to the protection domain of technical solutions of the utility model.

Claims (10)

1. for wearing a camera lens for display device, it is characterized in that: comprise the biconvex lens and plano-concave cylindrical mirror that are arranged side by side; Described biconvex lens is arranged at person of modern times's eye side, and plano-concave cylindrical mirror is arranged at people living in faraway places's eye side; Described biconvex lens comprises aspheric surface I and aspheric surface II, and plano-concave cylindrical mirror comprises aspheric surface III and aspheric surface IV; Described aspheric surface I near human eye, aspheric surface II and aspheric surface III opposed, aspheric surface IV is plane.

2. the camera lens for wearing display device according to claim 1, it is characterized in that: the radius-of-curvature of described aspheric surface I, aspheric surface II, aspheric surface III and aspheric surface IV is R1, R2, R3 and R4, wherein R1>0, R2<0, R1<-R2<100, R3<0, R4 are infinitely great.

3. the camera lens for wearing display device according to claim 2, is characterized in that: described aspheric surface I, aspheric surface II and aspheric surface III is even aspheric surface.

4. the camera lens for wearing display device according to claim 3, is characterized in that: the surface configuration of described aspheric surface I, aspheric surface II and aspheric surface III meets formula:

$Z=\frac{c{Y}^2}{1+\sqrt{1-(1+k)c^2{Y}^2}}+\underset{i=1}{\overset{N}{\mathrm{\&Sigma;}}}{\mathrm{\&alpha;}}_i{Y}^{2i},$

Wherein z is the coordinate along optical axis direction, and Y is the radial coordinate in units of length of lens unit, and c is curvature, and k is circular cone coefficient, α _ibe the coefficient of each high-order term, 2i is aspheric high power, and N is natural number.

5. the camera lens for wearing display device according to claim 4, is characterized in that: the parameter of described aspheric surface I is that c equals 0.0293, k equals 3.7857, α ₄equal 8.26E-06, α ₆equal 3.64E-08, α ₈equal-5.06E-10.

6. the camera lens for wearing display device according to claim 4, is characterized in that: the parameter of described aspheric surface II is that c equals-0.0157, k equals-181.0201, α ₄equal-2.93E-05, α ₆equal 3.29E-07, α ₈equal-4.67E-10.

7. the camera lens for wearing display device according to claim 4, is characterized in that: the parameter of described aspheric surface III is that c equals-0.1118, k equals-0.9938, α ₄equal 2.60E-05, α ₆equal-1.59E-07, α ₈equal 4.31E-10.

8. the camera lens for wearing display device according to claim 4, is characterized in that: the parameter of described aspheric surface IV is that c equals 0, k equals 0, α ₄equal 0, α ₆equal 0, α ₈equal 0.

9. the camera lens for wearing display device according to claim 2, is characterized in that: described aspheric surface I, aspheric surface II and aspheric surface III is odd aspheric surface, and its surface configuration meets formula:

$Z=\frac{c{Y}^2}{1+\sqrt{1-(1+k)c^2{Y}^2}}+\underset{i=1}{\overset{N}{\mathrm{\&Sigma;}}}{\mathrm{\&beta;}}_i{Y}^i,$

Wherein z is the coordinate along optical axis direction, and Y is the radial coordinate in units of length of lens unit, and c is curvature, and k is circular cone coefficient, β _ibe the coefficient of each high-order term, i is aspheric high power is natural number, and N is natural number.

10. wearing a display device, it is characterized in that: comprising the arbitrary described camera lens for wearing display device of claim 1-9.