Near-to-eye display device lens for global perception and near-to-eye display device

Abstract

The utility model discloses a near-to-eye display device lens for global perception 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, a sixth lens and a seventh lens which are sequentially arranged from an object side surface to an image surface, wherein the first lens to the seventh lens are glass spherical lenses; the first lens, the second lens and the sixth lens all have negative focal power, the third lens, the fourth lens, the fifth lens and the seventh lens all have positive focal power, the object side surfaces of the first lens, the third lens, the fourth lens, the fifth lens and the seventh lens are convex surfaces, the image side surfaces of the first lens, the third lens, the fourth lens, the fifth lens and the seventh lens are concave surfaces, and the image side surfaces of the third lens, the fourth lens, the fifth lens and the seventh lens are concave surfaces. The object side surfaces of the second lens and the sixth lens are concave surfaces, and the image side surfaces are convex surfaces. The lens can provide high-image-quality imaging on the premise that the field angle is kept to be larger than 160 degrees, the requirement of a user for sensing a wide environment is met, and the lens can be kept to be miniaturized.

Description

Technical Field

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

[0002] Currently, virtual reality (VR) and augmented reality (AR) are booming as pillar technologies in the digital economy era, and numerous head-mounted devices have emerged. One of the cores of these devices is the lens, which directly determines the user's immersive experience. A large field of view (FOV) lens can provide a wider field of view, simulate the real environment, and effectively enhance the user's engagement and perception depth in the virtual or augmented world. However, the pursuit of extreme immersion does not solely depend on the field of view range. High-quality images, clear details, and miniaturized designs are equally crucial. Only a lens that combines a large FOV, high image quality, and miniaturization can truly meet the needs of diverse application scenarios and drive the VR and AR technologies towards a more mature and convenient future. However, the existing large FOV lenses generally have problems of poor image quality and large lens volume.

[0003] In view of this, the present utility model is specifically proposed. Summary of the Utility Model

[0004] The purpose of the present utility model is to provide a lens for a near-eye display device for global perception and a near-eye display device, which can provide high-quality imaging while maintaining a field of view angle greater than 160°, meet the user's need for perceiving a vast environment, and keep the lens miniaturized, thereby solving the above technical problems existing in the prior art.

[0005] The purpose of the present utility model is achieved through the following technical solutions:

[0006] A lens for a near-eye display device for global perception includes: a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in sequence from the object side to the image side; wherein,

[0007] The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are all glass spherical lenses;

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

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

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

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

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

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

[0014] The seventh lens has a positive optical power, the object side of the seventh lens is convex, and the image side is convex.

[0015] A near-eye display device includes: a device body and a lens disposed on the device body, and the lens employs the lens of the near-eye display device for global perception according to the present invention.

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

[0017] Through the reasonable cooperation of the focal lengths of each lens, the reasonable design of the lens surface shape, and the reasonable setting of the diaphragm position, the aberration at each field of view can be corrected, achieving a large field of view image with both a large field of view and high resolution; since the field of view angle FOV≥160°, the lens meets the imaging requirements of an ultra-wide angle, ensuring the immersion of the head-mounted device; and the lens satisfies: 0.4<CA 1 / TTL<0.7 and other conditional expressions, using multiple pieces of high-refractive-index glass, having the advantages of short overall length and miniaturization, and being able to ensure that the near-eye display device using this lens is small in size. 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 use in 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 of the near-eye display device for global perception provided by the embodiment of the present utility model.

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

[0021] The markings in the figure are: 10 - first lens; 11 - second lens; 12 - third lens; 13 - aperture stop; 14 - fourth lens; 15 - fifth lens; 16 - sixth lens; 17 - seventh lens; 18 - image plane. Detailed implementation manners

[0022] Next, in combination with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments, which does not constitute a limitation to the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0023] First, the terms that may be used in this article are explained as follows:

[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.), it 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 sub-clause of a claim, then it only limits the elements clearly listed in that sub-clause, and the elements recorded in other sub-clauses are not excluded from the overall claim.

[0027] Unless otherwise clearly specified or limited, terms such as "installed", "connected", "connected", "fixed", etc. should 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 concentrations, temperatures, pressures, dimensions, or other parameters are expressed in the form of numerical ranges, the numerical ranges should be understood to specifically disclose all ranges formed by the pairing of any upper limit values, lower limit values, and preferred values within the numerical ranges, regardless of whether such ranges are explicitly recited; for example, if the numerical range "2 to 8" is recited, 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 recited herein include both their end values and all integers and fractions within the numerical ranges.

[0029] The terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of description and simplification of the description, and do not explicitly or implicitly imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to this article.

[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 those 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 in the embodiments of the present utility model for the manufacturer, 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 near-eye display device lens for global perception, a near-eye display device lens for global perception, including: a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in sequence from the object side to the image side; wherein,

[0032] The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are all glass spherical lenses;

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

[0034] The second lens has a negative optical power, and the object side of the second lens is concave and the image side is concave;

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

[0036] The fourth lens has a positive optical power, the object side surface of the fourth lens is convex, and the image side surface is convex;

[0037] The fifth lens has a positive optical power, the object side surface of the fifth lens is convex, and the image side surface is convex;

[0038] The sixth lens has a negative optical power, the object side surface of the sixth lens is concave, and the image side surface is concave;

[0039] The seventh lens has a positive optical power, the object side surface of the seventh lens is convex, and the image side surface is convex.

[0040] 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: 7 < |f1 / f| < 9;

[0041] The ratio of the focal length f2 of the second lens to the focal length f of the lens satisfies: 1 < |f2 / f| < 3;

[0042] The ratio of the focal length f3 of the third lens to the focal length f of the lens satisfies: 4 < |f3 / f| < 6;

[0043] 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;

[0044] The ratio of the focal length f5 of the fifth lens to the focal length f of the lens satisfies: 2.5 < |f5 / f| < 4;

[0045] The ratio of the focal length f6 of the sixth lens to the focal length f of the lens satisfies: 1 < |f6 / f| < 1.5;

[0046] The ratio of the focal length f6 of the seventh lens to the focal length f of the lens satisfies: 1.5 < |f7 / f| < 3.5;

[0047] 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, the focal length f6 of the sixth lens, and the focal length f7 of the seventh lens < 2.

[0048] Preferably, in the above lens, the ratio of the effective light transmission aperture CA1 of the object side surface of the first lens to the distance TTL from the object side surface of the first lens to the image surface satisfies: 0.4 < CA1 / TTL < 0.7.

[0049] 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 ≈ 0.66.

[0050] Preferably, among the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens in the above lens, the number of lenses VP with a refractive index greater than 1.6 satisfies VP≥3.

[0051] Preferably, in the above lens, the F number FNO of the lens satisfies: 1.9 < FNO < 3.0.

[0052] Preferably, in the above lens, the ratio of the sum GT of the central thicknesses of all the lenses to the distance TTL from the object side surface of the first lens to the image plane satisfies: 0.6 < GT / TTL < 0.8.

[0053] Preferably, in the above lens, the relative illumination RI of the lens satisfies: RI > 70%.

[0054] Preferably, in the above lens, the field of view FOV of the lens satisfies: FOV≥160°.

[0055] An embodiment of the present invention also provides a near-eye display device, including: a device body and a lens provided on the device body, and the lens adopts the above lens for full-field perception of the near-eye display device.

[0056] In summary, the lens of the embodiment of the present utility model can correct the aberrations at each field of view through the reasonable cooperation of the focal lengths of the respective lenses, the reasonable design of the lens surface shapes, and the reasonable setting of the diaphragm position, so as to obtain a large-field-of-view image with both a large field of view and high resolution; since the field of view FOV≥160°, the lens meets the imaging requirements of an ultra-wide angle and ensures the immersion of the head-mounted device; and the lens satisfies the conditional expressions such as 0.4 < CA 1 / TTL < 0.7, etc. By using multiple high-refractive-index glasses, it has the advantages of short overall length and miniaturization, and can ensure that the near-eye display device using the lens is small in size.

[0057] In order to more clearly show the technical solutions provided by the present utility model and the technical effects produced, the following uses specific embodiments to describe in detail the solutions provided by the embodiments of the present utility model.

[0058] Embodiment 1

[0059] As Figure 1 、 Figure 2As shown in the figure, this embodiment provides a lens for a near-eye display device for global perception. The lens is composed of a first lens 10, a second lens 11, a third lens 12, a diaphragm 13, a fourth lens 14, a fifth lens 15, a sixth lens 16, and a seventh lens 17 arranged in sequence from the object side to the image plane 20. Among them, the first lens 10 has a negative focal power, the second lens 11 has a negative focal power, the third lens 12 has a positive focal power, the fourth lens 14 has a positive focal power, the fifth lens 15 has a positive focal power, the sixth lens 16 has a negative focal power, and the seventh lens 17 has a positive focal power. All the lenses are glass spherical lenses.

[0060] 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 convex, and the image side is concave; 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 concave; the object side of the seventh lens 17 is convex, and the image side is convex.

[0061] Preferably, in the above lens, the focal lengths of each lens and the focal length of the lens satisfy the following conditional expressions: 7 < |f1 / f| < 9, 1 < |f2 / f| < 3, 4 < |f3 / f| < 6, 2.5 < |f4 / f| < 4.5, 2.5 < |f5 / f| < 4, 1 < |f6 / f| < 1.5, 1.5 < |f7 / f| < 3.5, 1 < |(f1 + f2 + f3) / (f4 + f5 + f6 + f7)| < 2, 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, f7 represents the focal length of the seventh lens 17, and f represents the focal length of the lens. By reasonably setting the focal lengths, it can be ensured that the lens has the characteristics of a short overall length, high resolution, and a large field of view, and at the same time has good temperature characteristics.

[0062] Preferably, in the above lens, the ratio of the effective clear aperture of the object side of the first lens 10 to the axial distance from the object side of the first lens 10 to the image plane 20 satisfies 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 axial distance from the object side of the first lens 10 to the image plane 20. Meeting this condition can make the lens have the characteristics of a small aperture and a small volume, which is convenient for realizing the miniaturization of the device.

[0063] Preferably, in the above lens, the ratio of the sum of the central thicknesses of all lenses to the on-axis distance from the object side surface of the first lens 10 to the image plane 20 satisfies the following conditional expression: 0.6 < GT / TTL < 0.8, where GT represents the sum of the central thicknesses of all lenses, and TTL represents the on-axis distance from the object side surface of the first lens 10 to the image plane 20. Meeting this condition can make the lens have a shorter overall length, and at the same time, there is enough space for the lenses to achieve the bending of the surface shape and correct the aberration.

[0064] Preferably, in the above lens, the ratio of the on-axis distance from the object side surface of the first lens 10 to the aperture stop 13 surface to the on-axis distance from the object side surface of the first lens 10 to the image plane 20 satisfies the following conditional expression: L / TTL ≈ 0.66, where L represents the on-axis distance from the object side surface of the first lens 10 to the aperture stop 13 surface, and TTL represents the on-axis distance from the object side surface of the first lens 10 to the image plane 20. By reasonably setting the position of the aperture stop 13 surface, it can ensure that the lens has better imaging clarity and a suitable aperture, and achieve high image quality on the basis of a short overall length.

[0065] Preferably, the above lens satisfies the following conditional expression: VP ≥ 3, where VP represents the number of glass lenses in the lens with a refractive index greater than 1.6. This condition can make the overall length of the lens shorter and facilitate the miniaturization of the device.

[0066] Preferably, in the above lens, the lens satisfies the following conditional expression: 1.9 < FNO < 3.0, where FNO represents the F-number of the lens. Meeting this condition can ensure that the lens has high imaging clarity and ensure that the lens has a light transmission amount matching the image plane.

[0067] Preferably, the field of view angle of the above lens satisfies the following conditional expression: FOV ≥ 160°, where FOV represents the field of view angle of the lens. This condition can enable the lens to obtain a larger field of view range and meet the requirements of the head-mounted device for environmental perception and immersion.

[0068] Preferably, in the above lens, the relative illumination satisfies the following conditional expression: RI > 70%, where RI represents the relative illumination. This condition can make the imaging illumination of the edge field of view of the lens higher, and there will not be too much noise during algorithm adjustment, which helps to improve the authenticity and immersion of the user's observation.

[0069] The imaging characteristics of this embodiment have high image quality and a large field of view angle imaging, with a field of view angle greater than 160°, meeting the user's demand for wide environmental perception; by using high-refractive-index glass materials and a small number of lenses to reduce the system volume, the miniaturization of the lens is achieved.

[0070] The relevant parameters of each lens in the lens of this embodiment are shown in Table 1.

[0071] Table 1 shows the relevant parameters of each lens in the lens

[0072]

[0073]

[0074] In the above embodiments, the focal length f of the lens is 1.53 mm, FNO = 2.80, the total length TOTR of the lens is 18.61 mm, and the field of view angle is 170°. Table 2 shows the conditional calculation results

[0075] Table 2 shows the conditional calculation results of each condition of the lens

[0076]

[0077]

[0078] As described above, it is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any change or replacement 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 art 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 known to those skilled in the art

Claims

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

2. The lens of the near-eye display device for global 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: 7 < |f1 / f| < 9; The ratio of the focal length f2 of the second lens to the focal length f of the lens satisfies: 1 < |f2 / f| < 3; The ratio of the focal length f3 of the third lens to the focal length f of the lens satisfies: 4 < |f3 / f| < 6; 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: 2.5 < |f5 / f| < 4; The ratio of the focal length f6 of the sixth lens to the focal length f of the lens satisfies: 1 < |f6 / f| < 1.5; The ratio of the focal length f6 of the seventh lens to the focal length f of the lens satisfies: 1.5 < |f7 / 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, the focal length f6 of the sixth lens, and the focal length f7 of the seventh lens < 2.

3. The near-eye display device lens for global 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.

7.

4. The near-eye display device lens for global 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.

66.

5. The near-eye display device lens for global perception according to claim 1 or 2, wherein, Among the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens, the number of lenses VP with a refractive index greater than 1.6 ≥ 3.

6. The near-eye display device lens for global perception according to claim 1 or 2, wherein, The F-number FNO of the lens satisfies: 1.9 < FNO < 3.

0.

7. The near-eye display device lens for global perception according to claim 1 or 2, characterized in that In the lens, the ratio of the sum GT of the central thicknesses of all lenses to the distance TTL from the object side of the first lens to the image side satisfies: 0.6 < GT / TTL < 0.

8.

8. The near-eye display device lens for global perception according to claim 1 or 2, characterized in that, The relative illumination RI of the lens satisfies: RI > 70%.

9. The near-eye display device lens for global 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: The device body and the lens provided on the device body, characterized in that the lens adopts the lens of the near-eye display device for global perception described in any one of claims 1-9.

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