Lens for sensing near-to-eye display environment and near-to-eye display device

Abstract

The utility model discloses a lens for sensing a near-to-eye display environment and a near-to-eye display device, and belongs to the field of optical lenses, the lens comprises a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from an object side surface to an image surface; wherein the object side surfaces of the first lens, the fourth lens and the fifth lens are convex surfaces, and the image side surfaces of the first lens, the fourth lens and the fifth lens are concave surfaces; object side surfaces of the second lens, the third lens and the sixth lens are concave surfaces, and image side surfaces of the second lens, the third lens and the sixth lens are concave surfaces; the first lens, the second lens and the sixth lens all have negative focal power; the third lens, the fourth lens and the fifth lens all have positive focal power; the first to eighth lenses are glass spherical lenses. The lens has the imaging characteristics of high image quality and large field angle imaging, and the field angle is greater than 160 degrees, so that a user can perceive a wide environment; the size of the lens is reduced by using a glass material with high refractive index and a small number of lenses, and miniaturization is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of optical lenses, and particularly to a lens for near-eye display environment perception and a near-eye display device. Background Art

[0002] The innovation of lens technology is the key to the development of virtual reality (VR) and augmented reality (AR), just like the eyes in the digital economy era. To bring a better experience to users, lenses should continuously evolve towards a large field of view, high image quality, and miniaturization. This means not only a wider field of vision and clearer details, but also more portable and comfortable devices, and a more real, immersive, and lasting user experience. This evolution that combines technological progress with user needs will accelerate the process of VR and AR moving from concept to life, and ultimately profoundly change the way we interact and perceive the world.

[0003] However, the current lenses with a large field of view have disadvantages such as poor image quality and large lens volume.

[0004] In view of this, the present utility model is specifically proposed. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide a lens for near-eye display environment perception and a near-eye display device, which can achieve high-image-quality imaging with a large field of view angle greater than 160°, provide users with the perception of a vast environment, and realize the miniaturization of the lens, so as to solve the above technical problems existing in the prior art.

[0006] The purpose of the present utility model is achieved through the following technical solutions:

[0007] A lens for near-eye display environment perception, comprising: a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side to the image side; wherein,

[0008] The object side of the first lens is convex and the image side is concave, and the first lens has a negative optical power;

[0009] The object side of the second lens is concave and the image side is concave, and the second lens has a negative optical power;

[0010] The object side of the third lens is concave and the image side is convex, and the third lens has a positive optical power;

[0011] The object side of the fourth lens is convex and the image side is convex, and the fourth lens has a positive optical power;

[0012] The object side of the fifth lens is convex and the image side is convex, and the fifth lens has a positive optical power;

[0013] The object side of the sixth lens is concave and the image side is convex, and the sixth lens has a negative optical power;

[0014] The first lens to the sixth lens are all glass spherical lenses.

[0015] A near-eye display device includes: a device body and a lens disposed on the device body, and the lens adopts the lens for near-eye display environment perception described in the present invention.

[0016] Compared with the prior art, the lens for near-eye display environment perception and the near-eye display device provided by the present utility model have the following beneficial effects:

[0017] Through the reasonable cooperation of the surface types and focal lengths of each lens and the reasonable setting of the diaphragm position, the field of view angle FOV≥160°, which can meet the user's demand for ultra-wide angle and is beneficial to enhancing the immersion of the head-mounted device; and a large-field-of-view image with high resolution can be obtained, which is beneficial to enhancing the user's viewing experience, and at the same time has good temperature characteristics to adapt to diversified application scenarios; this lens satisfies: 0.4<CA1 / TTL<0.7, uses multiple high-refractive-index glasses and has a small total number of lenses, has the advantages of miniaturization and light weight, and can reduce the volume of the near-eye display device using the same. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, it should be understood that the above drawings are schematic and not drawn to scale. Without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of the lens for near-eye display environment perception provided by the embodiment of the present utility model.

[0020] Figure 2 It is a relative illumination diagram of the lens for near-eye display environment perception provided by the embodiment of the present utility model.

[0021] The marks in the figure are: 10 - first lens; 11 - second lens; 12 - third lens; 13 - diaphragm; 14 - fourth lens; 15 - fifth lens; 16 - sixth lens; 17 - image plane. Detailed Embodiments

[0022] The following clearly and completely describes the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model; obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments, which does not constitute a limitation to the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] First, the following explanations are given for the terms that may be used in this article:

[0024] The term "and / or" means that either or both of the two can be realized. For example, X and / or Y means that it includes both the case of "X" or "Y" and the three cases of "X and Y".

[0025] The description of terms such as "comprising", "including", "containing", "having" or other similar semantics should be interpreted as non-exclusive inclusion. For example: including a certain technical feature element (such as raw material, component, ingredient, carrier, dosage form, material, size, part, component, mechanism, device, step, process, method, reaction condition, processing condition, parameter, algorithm, signal, data, product or article, etc.) should be interpreted as not only including the clearly listed certain technical feature element, but also including other technical feature elements well known in the art that are not clearly listed.

[0026] The term "consisting of" means excluding any technical feature element that is not clearly listed. If this term is used in a claim, this term will make the claim a closed type, so that it does not include technical feature elements other than the clearly listed technical feature elements, except for related conventional impurities. If this term only appears in a certain clause of the claim, then it only limits the elements clearly listed in that clause, and the elements recorded in other clauses are not excluded from the overall claim.

[0027] Unless otherwise clearly stipulated or limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example: it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this article can be understood according to specific situations.

[0028] When concentration, temperature, pressure, size, or other parameters are expressed in the form of a numerical range, the numerical range should be understood as specifically disclosing all ranges formed by the pairing of any upper limit value, lower limit value, and preferred value within the numerical range, regardless of whether such ranges are explicitly recorded; for example, if the numerical range "2 to 8" is recorded, then this numerical range should be interpreted as including ranges such as "2 to 7", "2 to 6", "5 to 7", "3 to 4 and 6 to 7", "3 to 5 and 7", "2 and 5 to 7", etc. Unless otherwise specified, the numerical ranges recorded herein include both their end values and all integers and fractions within the numerical range.

[0029] The orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of description and to simplify the description, rather than explicitly or implicitly indicating that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this document.

[0030] The following provides a detailed description of the solution provided by the present utility model. The content not described in detail in the embodiments of the present utility model belongs to the prior art well-known to those skilled in the art. For the conditions not specified in the embodiments of the present utility model, they are carried out according to the conventional conditions in the art or the conditions recommended by the manufacturer. For the reagents or instruments not specified by the manufacturer in the embodiments of the present utility model, they are all conventional products that can be obtained through commercial purchase.

[0031] As Figure 1 shown, an embodiment of the present utility model provides a lens for near-eye display environment perception, including: a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side to the image side; wherein,

[0032] The object side of the first lens is convex and the image side is concave, and the first lens has a negative optical power;

[0033] The object side of the second lens is concave and the image side is concave, and the second lens has a negative optical power;

[0034] The object side of the third lens is concave and the image side is convex, and the third lens has a positive optical power;

[0035] The object side of the fourth lens is convex and the image side is convex, and the fourth lens has a positive optical power;

[0036] The object side of the fifth lens is convex and the image side is convex, and the fifth lens has a positive focal power;

[0037] The object side of the sixth lens is concave and the image side is convex, and the sixth lens has a negative focal power;

[0038] The first lens to the sixth lens are all glass spherical lenses.

[0039] Preferably, in the above lens, the ratio of the focal length f1 of the first lens to the focal length f of the lens satisfies: 80 < |f1 / f| < 85;

[0040] The ratio of the focal length f2 of the second lens to the focal length f of the lens satisfies: 2.5 < |f2 / f| < 3.5;

[0041] The ratio of the focal length f3 of the third lens to the focal length f of the lens satisfies: 9.5 < |f3 / f| < 10.5;

[0042] The ratio of the focal length f4 of the fourth lens to the focal length f of the lens satisfies: 2.5 < |f4 / f| < 4.5;

[0043] The ratio of the focal length f5 of the fifth lens to the focal length f of the lens satisfies: 3 < |f5 / f| < 4.5;

[0044] The ratio of the focal length f6 of the sixth lens to the focal length f of the lens satisfies: 2 < |f6 / f| < 3.5;

[0045] The ratio of the sum of the focal length f1 of the first lens, the focal length f2 of the second lens and the focal length f3 of the third lens to the sum of the focal length f4 of the fourth lens, the focal length f5 of the fifth lens and the focal length f6 of the sixth lens < 9.

[0046] Preferably, in the above lens, the ratio of the effective clear aperture CA1 of the object side of the first lens to the distance TTL from the object side of the first lens to the image plane satisfies:

[0047] 0.4 < CA1 / TTL < 0.5.

[0048] Preferably, in the above lens, among the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens, the number of lenses VP with a refractive index greater than 1.6 ≥ 3.

[0049] Preferably, the F number FNO of the above lens satisfies: 1.9 < FNO < 3.0.

[0050] Preferably, in the above lens, the ratio of the sum GT of the center thicknesses of all lenses to the distance TTL from the object side of the first lens to the image plane satisfies: 0.5 < GT / TTL < 0.7.

[0051] Preferably, in the above lens, the ratio of the distance L from the object side surface of the first lens to the diaphragm surface to the distance TTL from the object side surface of the first lens to the image surface is: L / TTL≈0.7.

[0052] Preferably, the relative illumination RI of the above lens satisfies: RI>60%.

[0053] Preferably, the field of view FOV of the above lens satisfies: FOV≥160°.

[0054] An embodiment of the present invention further provides a near-eye display device, including: a device body and a lens disposed on the device body, and the lens adopts the above lens for near-eye display environment perception.

[0055] In summary, the lens of the embodiment of the present utility model, through the reasonable cooperation of the surface shapes and focal lengths of each lens surface and the reasonable setting of the diaphragm position, enables the field of view FOV of the lens to be FOV≥160°, which can meet the user's demand for an ultra-wide angle and is beneficial to enhancing the immersion of the head-mounted device; and can obtain a large-field-of-view image with high resolution, which is beneficial to enhancing the user's experience, and at the same time has good temperature characteristics to adapt to diversified application scenarios; the lens satisfies: 0.4<CA1 / TTL<0.7, uses multiple pieces of high-refractive-index glass and has a small total number of lenses, and has the advantages of miniaturization and light weight.

[0056] In order to more clearly show the technical solutions provided by the present utility model and the technical effects generated, the following uses specific embodiments to describe in detail the solutions provided by the embodiments of the present utility model.

[0057] Embodiment 1

[0058] As Figure 1 、 Figure 2 shown, this embodiment provides a lens for near-eye display environment perception. The lens has the imaging characteristics of high image quality and large field of view imaging. The field of view is greater than 160°, which can provide users with the perception of a vast environment; by using glass materials with high refractive index and a small number of lenses, the lens volume is reduced to achieve miniaturization, and the image quality is ensured through the cooperation of the lens optical powers. It includes: a first lens 10, a second lens 11, a third lens 12, a diaphragm 13, a fourth lens 14, a fifth lens 15, and a sixth lens 16 arranged in sequence from the object side to the image side; among them, the first lens 10 has a negative optical power, the second lens 11 has a negative optical power, the third lens 12 has a positive optical power, the fourth lens 14 has a positive optical power, the fifth lens 15 has a positive optical power, and the sixth lens 16 has a negative optical power. The first lens to the sixth lens are all glass spherical lenses;

[0059] The object side of the first lens 10 is convex, and the image side is concave; the object side of the second lens 11 is concave, and the image side is concave; the object side of the third lens 12 is concave, and the image side is convex; the object side of the fourth lens 14 is convex, and the image side is convex; the object side of the fifth lens 15 is convex, and the image side is convex; the object side of the sixth lens 16 is concave, and the image side is convex.

[0060] Preferably, in the above lens, the ratio of the focal length of each lens to the focal length f of the lens respectively satisfies the following conditional expressions: 80 < |f1 / f| < 85, 2.5 < |f2 / f| < 3.5, 9.5 < |f3 / f| < 10.5, 2.5 < |f4 / f| < 4.5, 3 < |f5 / f| < 4.5, 2 < |f6 / f| < 3.5, 7.5 < |(f1 + f2 + f3) / (f4 + f5 + f6)| < 9, where f1 represents the focal length of the first lens 10, f2 represents the focal length of the second lens 11, f3 represents the focal length of the third lens 12, f4 represents the focal length of the fourth lens 14, f5 represents the focal length of the fifth lens 15, f6 represents the focal length of the sixth lens 16, and f represents the focal length of the lens. By reasonably restricting the focal lengths of each lens, it can be ensured that the optical system has a large field of view angle, while better correcting the aberration of the edge field of view, improving the imaging quality, and at the same time, it can also ensure that the optical system has a short overall length and good temperature characteristics.

[0061] Preferably, the field of view angle FOV of the above lens satisfies: FOV ≥ 160°, where FOV represents the field of view angle of the lens. This condition enables the lens to have a large enough field of view angle to meet the high requirements of the head-mounted device for realism and immersion.

[0062] Preferably, in the above lens, the effective clear aperture CA1 of the object side of the first lens 10 and the on-axis distance TTL from the object side of the first lens 10 to the image plane 17 satisfy the following conditional expression: 0.4 < CA1 / TTL < 0.7, where CA1 represents the effective clear aperture of the object side of the first lens 10, and TTL represents the on-axis distance from the object side of the first lens 10 of the lens to the image plane 17. This condition enables the lens to have the characteristics of a small aperture and a small volume, so as to realize the miniaturization of the device.

[0063] Preferably, in the above lens, the number VP of glass lenses with a refractive index greater than 1.6 in the lens satisfies: VP ≥ 3, where VP represents the number of glass lenses with a refractive index greater than 1.6 in the lens. This condition enables the lens to have the characteristic of a short overall length, so as to realize the miniaturization of the device.

[0064] Preferably, the F-number of the above lens satisfies the following conditional formula: 1.9 < FNO < 3.0, where FNO represents the F-number of the lens. This condition ensures that there is sufficient light transmission on the imaging surface of the lens, guaranteeing imaging resolution and clarity.

[0065] Preferably, in the above lens, the ratio of the sum GT of the central thicknesses of all lenses to the distance TTL from the object side surface of the first lens to the image plane satisfies the following conditional formula: 0.5 < GT / TTL < 0.7, where GT represents the sum of the central thicknesses of all lenses of the lens, and TTL represents the axial distance from the object side surface of the first lens 10 to the image plane 17 of the lens. This condition gives the lens the characteristic of a short overall length, and at the same time, through the curvature of the lens surface shape, the lens has the characteristic of high resolution. Being too low is not conducive to the realization of miniaturization, and being too high is not conducive to the improvement of image quality and weight control.

[0066] Preferably, in the above lens, the ratio of the distance L from the object side surface of the first lens to the diaphragm plane to the distance TTL from the object side surface of the first lens to the image plane satisfies the following conditional formula: L / TTL ≈ 0.7, where L represents the axial distance from the object side surface of the first lens 10 to the diaphragm 13 plane of the lens, and TTL represents the axial distance from the object side surface of the first lens 10 to the image plane 17 of the lens. By reasonably setting the position of the diaphragm 13 plane, it can be ensured that the lens has high image quality. In particular, the aberrations in the edge field of view will be better corrected, and at the same time, the lens is ensured to have a short overall length.

[0067] Preferably, in the above lens, the lens satisfies the following conditional formula: RI > 60%, where RI represents relative illumination. Meeting this condition ensures that there will not be too much noise in the edge field of view of the lens during later correction, which affects imaging clarity, so as to achieve the realism and immersion of the device.

[0068] The lens of this embodiment can achieve miniaturization and ensure image quality through the cooperation of lens optical powers.

[0069] Refer to Figure 1 、 Figure 2 as shown. The relevant parameters of each lens in the lens of this embodiment are shown in Table 1.

[0070] Table 1 shows the relevant parameters of each lens

[0071]

[0072]

[0073] In this embodiment, the focal length f of the lens is 1.26 mm, FNO = 2.75, the overall length TOTR of the lens is 22.95 mm, and the field of view angle is 160°. Table 2 shows the conditional calculation results of the lens.

[0074] Table 2 shows the calculation results of the lens conditions

[0075]

[0076] As mentioned above, it is only the preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims. The information disclosed in the background art part of this article is only intended to deepen the understanding of the overall background technology of the present utility model, and should not be regarded as an admission or any form of implication that this information constitutes the prior art already known to those skilled in the art.

Claims

1. A lens for near-eye display environment perception, characterized in that, Including: A first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side to the image side; wherein, The object side of the first lens is convex and the image side is concave, and the first lens has a negative focal power; The object side of the second lens is concave and the image side is concave, and the second lens has a negative focal power; The object side of the third lens is concave and the image side is convex, and the third lens has a positive focal power; The object side of the fourth lens is convex and the image side is convex, and the fourth lens has a positive focal power; The object side of the fifth lens is convex and the image side is convex, and the fifth lens has a positive focal power; The object side of the sixth lens is concave and the image side is convex, and the sixth lens has a negative focal power; The first lens to the sixth lens are all glass spherical lenses.

2. The lens for near-eye display environment perception according to claim 1, wherein, The ratio of the focal length f1 of the first lens to the focal length f of the lens satisfies: 80 < |f1 / f| < 85; The ratio of the focal length f2 of the second lens to the focal length f of the lens satisfies: 2.5 < |f2 / f| < 3.5; The ratio of the focal length f3 of the third lens to the focal length f of the lens satisfies: 9.5 < |f3 / f| < 10.5; The ratio of the focal length f4 of the fourth lens to the focal length f of the lens satisfies: 2.5 < |f4 / f| < 4.5; The ratio of the focal length f5 of the fifth lens to the focal length f of the lens satisfies: 3 < |f5 / f| < 4.5; The ratio of the focal length f6 of the sixth lens to the focal length f of the lens satisfies: 2 < |f6 / f| < 3.5; The ratio of the sum of the focal length f1 of the first lens, the focal length f2 of the second lens, and the focal length f3 of the third lens to the sum of the focal length f4 of the fourth lens, the focal length f5 of the fifth lens, and the focal length f6 of the sixth lens < 9.

3. The lens for near-eye display environment perception according to claim 1 or 2, characterized in that The ratio of the effective clear aperture CA1 of the object side of the first lens to the distance TTL from the object side of the first lens to the image side satisfies: 0.4 < CA1 / TTL < 0.

5.

4. The lens for near-eye display environment perception according to claim 1 or 2, characterized in that Among the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens, the number of lenses VP with a refractive index greater than 1.6 ≥ 3.

5. The lens for near-eye display environment perception according to claim 1 or 2, characterized in that, The F-number FNO of the lens satisfies: 1.9 < FNO < 3.

0.

6. The lens for near-eye display environment perception according to claim 1 or 2, characterized in that In the lens, the ratio of the sum GT of the center thicknesses of all lenses to the distance TTL from the object side of the first lens to the image side satisfies: 0.5 < GT / TTL < 0.

7.

7. The lens for near-eye display environment perception according to claim 1 or 2, characterized in that The ratio of the distance L from the object side of the first lens to the diaphragm surface to the distance TTL from the object side of the first lens to the image side is: L / TTL ≈ 0.

7.

8. The lens for near-eye display environment perception according to claim 1 or 2, characterized in that The relative illumination RI of the lens satisfies: RI > 60%.

9. The lens for near-eye display environment perception according to claim 1 or 2, characterized in that, The field of view FOV of the lens satisfies: FOV ≥ 160°.

10. A near-eye display device, comprising: A device body and a lens provided on the device body, characterized in that the lens adopts the lens for near-eye display environment perception according to any one of claims 1-9.

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