Optical lens group

Abstract

An optical lens group is suitable for being applied to a projection lens. The optical lens group is used for generating a plurality of light beams from the plurality of lights emitted by the multi-light source generating unit through the optical lens group. The direction facing the multi-light-source generating unit is a light inlet side, and the opposite side is a light outlet side. The optical lens group sequentially comprises a first lens to a sixth lens from the light emitting side to the light incident side along the optical axis, and each of the first lens to the sixth lens comprises a light emitting surface facing the light emitting side and a light incident surface facing the light incident side. The first lens has a negative refractive index, the second lens has a positive refractive index, the fourth lens has a negative refractive index, the fifth lens has a positive refractive index, the circumferential area of the light-out surface of the fifth lens is a concave surface, and the circumferential area of the light-in surface of the sixth lens is a convex surface. The optical lens group only comprises the six lenses, and the projection lens and the optical lens group respectively meet the following conditional expressions: EDmax / EDmin is less than or equal to 2.100; v1 + V2 + V3 < = 140.

Description

Technical Field

[0001] The invention relates to an electronic device, and in particular to an optical lens assembly. Background Art

[0002] The specifications of portable electronic devices are changing with each passing day, and the key components, namely optical lens groups, are also becoming more diversified. With the popularization of virtual reality (VR) or augmented reality (AR), the development of near-eye displays and peripheral devices has also accelerated. Therefore, in addition to being used for video and recording, optical lens groups can also be designed to use the principle of optical reflection to project image light or sensing light onto the lens of the near-eye display or onto the eyes, and then reflect the image or sensing light into the user's eyes or sensors to achieve the effect of augmented reality or eye tracking.

[0003] However, in order to achieve the best ratio between light collection and projection imaging of the projection lens, the optical lens group also needs to be continuously improved in design to enhance the optical imaging quality. How to achieve the above conditions has become a major challenge for related manufacturers. Summary of the invention

[0004] The invention provides an optical lens group, which is suitable for application in a projection lens and improves the projection effect.

[0005] An optical lens group provided by the present invention is suitable for application in a projection lens. The optical lens group is used to generate multiple light beams from multiple lights emitted by a multi-light source generating unit through the optical lens group. The direction toward the multi-light source generating unit is the light incident side, and the other opposite side is the light exit side. The optical lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens to a sixth lens in sequence along the optical axis from the light exit side to the light incident side, and the first lens to the sixth lens each include a light exit surface toward the light exit side and a light incident surface toward the light incident side. The first lens has a negative refractive power, the second lens has a positive refractive power, the fourth lens has a negative refractive power, the fifth lens has a positive refractive power, the circumferential area of ​​the light exit surface of the fifth lens is a concave surface, and the circumferential area of ​​the light incident surface of the sixth lens is a convex surface. The optical lens group includes only the above six lenses, and the projection lens and the optical lens group respectively satisfy the following conditional formulas: EDmax / EDmin≦2.100; V1+V2+V3≦140, EDmax is the maximum effective diameter of the six lenses, EDmin is the minimum effective diameter of the six lenses, V1 is the Vd Abbe number of the first lens, V2 is the Vd Abbe number of the second lens, and V3 is the Vd Abbe number of the third lens.

[0006] Another optical lens group provided by the present invention is suitable for application in a projection lens. The optical lens group is used to generate multiple light beams from multiple lights emitted by a multi-light source generating unit through the optical lens group. The direction toward the multi-light source generating unit is the light incident side, and the other opposite side is the light exiting side. The optical lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens to a sixth lens in sequence along the optical axis from the light exiting side to the light incident side, and the first lens to the sixth lens each include a light exiting surface toward the light exiting side and a light incident surface toward the light incident side. The first lens has a negative refractive power, and the optical axis area of ​​the light exiting surface of the first lens is a convex surface. The second lens has a positive refractive power, and the fourth lens has a negative refractive power. The fifth lens has a positive refractive power, the circumferential area of ​​the light exiting surface of the fifth lens is a concave surface, and the optical axis area of ​​the light incident surface of the sixth lens is a concave surface. The optical lens group includes only the above six lenses, and the projection lens and the optical lens group respectively satisfy the following conditional formulas: EDmax / EDmin≦2.100; V1+V3≦100, EDmax is the maximum effective diameter of the six lenses, EDmin is the minimum effective diameter of the six lenses, V1 is the Vd Abbe number of the first lens, and V3 is the Vd Abbe number of the third lens.

[0007] Another optical lens group provided by the present invention is suitable for application in a projection lens. The optical lens group is used to generate multiple light beams from multiple lights emitted by a multi-light source generating unit through the optical lens group. The direction toward the multi-light source generating unit is the light incident side, and the other opposite side is the light exit side. The optical lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens to a sixth lens in sequence along the optical axis from the light exit side to the light incident side, and the first lens to the sixth lens each include a light exit surface toward the light exit side and a light entrance surface toward the light entrance side. The first lens has a negative refractive power, and the optical axis area of ​​the light exit surface of the first lens is a convex surface. The second lens has a positive refractive power, and the circumferential area of ​​the light exit surface of the second lens is a convex surface, the fourth lens has a negative refractive power, the fifth lens has a positive refractive power, the optical axis area of ​​the light entrance surface of the sixth lens is a concave surface, and the circumferential area of ​​the light entrance surface is a convex surface. The optical lens group includes only the above six lenses, and the projection lens and the optical lens group respectively satisfy the following conditional formulas: EDmax / EDmin≦2.100; V1+V3≦100, EDmax is the maximum effective diameter of the six lenses, EDmin is the minimum effective diameter of the six lenses, V1 is the Vd Abbe number of the first lens, and V3 is the Vd Abbe number of the third lens.

[0008] Based on the above, the beneficial effect of the optical lens set of the embodiment of the present invention is that: by satisfying the conditional formula: EDmax / EDmin≦2.100 and the other conditional formulas, the arrangement design of the concave and convex surfaces of the lens and the conditions of the refractive index, the optical lens set can help to effectively collect the main light beam and the edge light beam emitted by the image light source from the light incident side, so that the above light beams can be projected to the light exit side with a high proportion, thereby improving the image effect of the projection lens. In addition, the aberration of the central field of view of the imaging surface can also be corrected, so when the optical lens set is applied to the projection lens, it is beneficial to provide better chromatic aberration and better projection image quality.

[0009] In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1A is a schematic diagram illustrating a schematic diagram of an optical lens assembly of the present invention applied to a projection lens;

[0011] Figure 1B yes Figure 1A A front view of an embodiment of a multi-light source generating unit in FIG.

[0012] Figure 2 is a schematic diagram illustrating the surface structure of a lens;

[0013] Figure 3 It is a schematic diagram illustrating the concave-convex structure of a lens surface and the focus of light;

[0014] Figure 4 is a schematic diagram illustrating the surface structure of a lens of Example 1;

[0015] Figure 5 is a schematic diagram illustrating the surface structure of a lens of Example 2;

[0016] Figure 6 is a schematic diagram illustrating the surface structure of a lens of Example 3;

[0017] Figure 7 is a schematic diagram of an optical lens assembly according to a first embodiment of the present invention;

[0018] Fig. 8A is a schematic diagram of longitudinal spherical aberration of the optical lens assembly of the first embodiment;

[0019] Figure 8B is a half-viewing angle diagram of the field curvature (sagittal direction) of the optical lens assembly of the first embodiment;

[0020] Figure 8C is a half-viewing angle diagram of the field curvature (meridian direction) of the optical lens assembly of the first embodiment;

[0021] Fig.8D is a half-viewing angle diagram of the distortion of the optical lens assembly of the first embodiment;

[0022] Fig. 9 Detailed optical data of the optical lens assembly of the first embodiment of the present invention are shown;

[0023] Fig.10 The aspheric parameters of the optical lens assembly of the first embodiment of the present invention are shown;

[0024] Fig.11 is a schematic diagram of an optical lens assembly according to a second embodiment of the present invention;

[0025] Fig. 12A is a schematic diagram of longitudinal spherical aberration of the optical lens assembly of the second embodiment;

[0026] Fig. 12B is a half-viewing angle diagram of the field curvature (sagittal direction) of the optical lens assembly of the second embodiment;

[0027] Fig. 12C is a half-viewing angle diagram of the field curvature (meridian direction) of the optical lens assembly of the second embodiment;

[0028] Fig.12D is a half-viewing angle diagram of the distortion of the optical lens assembly of the second embodiment;

[0029] Fig.13 Detailed optical data of the optical lens assembly of the second embodiment of the present invention are shown;

[0030] Fig.14 The aspheric parameters of the optical lens assembly of the second embodiment of the present invention are shown;

[0031] Fig.15 is a schematic diagram of an optical lens assembly according to a third embodiment of the present invention;

[0032] Fig.16A is a schematic diagram of longitudinal spherical aberration of the optical lens assembly of the third embodiment;

[0033] Fig. 16B is a half-viewing angle diagram of the field curvature (sagittal direction) of the optical lens assembly of the third embodiment;

[0034] Fig. 16C is a half-viewing angle diagram of the field curvature (meridian direction) of the optical lens assembly of the third embodiment;

[0035] Fig.16D is a half-viewing angle diagram of the distortion of the optical lens assembly of the third embodiment;

[0036] Fig.17 Detailed optical data of the optical lens assembly of the third embodiment of the present invention are shown;

[0037] Fig.18 The aspheric parameters of the optical lens assembly of the third embodiment of the present invention are shown;

[0038] Fig.19 is a schematic diagram of an optical lens assembly according to a fourth embodiment of the present invention;

[0039] Fig. 20A is a schematic diagram of longitudinal spherical aberration of the optical lens assembly of the fourth embodiment;

[0040] Fig. 20B is a half-viewing angle diagram of the field curvature (sagittal direction) of the optical lens assembly of the fourth embodiment;

[0041] Fig. 20C is a half-viewing angle diagram of the field curvature (meridian direction) of the optical lens assembly of the fourth embodiment;

[0042] Fig.20D is a half-viewing angle diagram of the distortion of the optical lens assembly of the fourth embodiment;

[0043] Fig.21 Detailed optical data of the optical lens assembly according to the fourth embodiment of the present invention are shown;

[0044] Fig. 22 The aspheric parameters of the optical lens assembly of the fourth embodiment of the present invention are shown;

[0045] Fig.23 is a schematic diagram of an optical lens assembly according to a fifth embodiment of the present invention;

[0046] Fig.24A is a schematic diagram of longitudinal spherical aberration of the optical lens assembly of the fifth embodiment;

[0047] Fig. 24B is a half-viewing angle diagram of the field curvature (sagittal direction) of the optical lens assembly of the fifth embodiment;

[0048] Fig.24C is a half-viewing angle diagram of the field curvature (meridian direction) of the optical lens assembly of the fifth embodiment;

[0049] Fig.24D is a half-viewing angle diagram of the distortion of the optical lens assembly of the fifth embodiment;

[0050] Fig.25 Detailed optical data of the optical lens assembly according to the fifth embodiment of the present invention are shown;

[0051] Fig.26 The aspheric parameters of the optical lens assembly of the fifth embodiment of the present invention are shown;

[0052] Fig. 27is a schematic diagram of an optical lens assembly according to a sixth embodiment of the present invention;

[0053] Fig.28A is a schematic diagram of longitudinal spherical aberration of the optical lens assembly of the sixth embodiment;

[0054] Fig.28B is a half-viewing angle diagram of the field curvature (sagittal direction) of the optical lens assembly of the sixth embodiment;

[0055] Fig.28C is a half-viewing angle diagram of the field curvature (meridian direction) of the optical lens assembly of the sixth embodiment;

[0056] Fig.28D is a half-viewing angle diagram of the distortion of the optical lens assembly of the sixth embodiment;

[0057] Fig.29 Detailed optical data of the optical lens assembly according to the sixth embodiment of the present invention are shown;

[0058] Fig.30 The aspheric parameters of the optical lens assembly of the sixth embodiment of the present invention are shown;

[0059] Fig.31 is a schematic diagram of an optical lens assembly according to a seventh embodiment of the present invention;

[0060] Fig.32A is a schematic diagram of longitudinal spherical aberration of the optical lens assembly of the seventh embodiment;

[0061] Fig.32B is a half-viewing angle diagram of the field curvature (sagittal direction) of the optical lens assembly of the seventh embodiment;

[0062] Fig.32C is a half-viewing angle diagram of the field curvature (meridian direction) of the optical lens assembly of the seventh embodiment;

[0063] Fig.32D is a half-viewing angle diagram of the distortion of the optical lens assembly of the seventh embodiment;

[0064] Fig.33 Detailed optical data of the optical lens assembly of the seventh embodiment of the present invention are shown;

[0065] Fig.34 The aspheric parameters of the optical lens assembly of the seventh embodiment of the present invention are shown;

[0066] Fig.35 is a schematic diagram of an optical lens assembly according to an eighth embodiment of the present invention;

[0067] Fig.36A is a schematic diagram of longitudinal spherical aberration of the optical lens assembly of the eighth embodiment;

[0068] Fig.36B is a half-viewing angle diagram of the field curvature (sagittal direction) of the optical lens assembly of the eighth embodiment;

[0069] Fig.36C is a half-viewing angle diagram of the field curvature (meridian direction) of the optical lens assembly of the eighth embodiment;

[0070] Fig.36D is a half-viewing angle diagram of the distortion of the optical lens assembly of the eighth embodiment;

[0071] Fig.37 Detailed optical data of the optical lens assembly of the eighth embodiment of the present invention are shown;

[0072] Fig.38 The aspheric parameters of the optical lens assembly of the eighth embodiment of the present invention are shown;

[0073] Fig.39 is a schematic diagram of an optical lens assembly according to a ninth embodiment of the present invention;

[0074] Fig.40A is a schematic diagram of longitudinal spherical aberration of the optical lens assembly of the ninth embodiment;

[0075] Fig.40B is a half-viewing angle diagram of the field curvature (sagittal direction) of the optical lens assembly of the ninth embodiment;

[0076] Fig.40C is a half-viewing angle diagram of the field curvature (meridian direction) of the optical lens assembly of the ninth embodiment;

[0077] Fig.40D is a half-viewing angle diagram of the distortion of the optical lens assembly of the ninth embodiment;

[0078] Fig.41 Detailed optical data of the optical lens assembly of the ninth embodiment of the present invention are shown;

[0079] Fig.42 The aspheric parameters of the optical lens assembly of the ninth embodiment of the present invention are shown;

[0080] Fig.43 The important parameters of the optical lens assembly of the first to third embodiments of the present invention and the numerical values ​​of their relationship are shown;

[0081] Fig.44 The important parameters of the optical lens assembly of the fourth to sixth embodiments of the present invention and the values ​​of their relationship are shown;

[0082] Fig.45 The important parameters of the optical lens assembly of the seventh to ninth embodiments of the present invention and the numerical values ​​of their relationship are shown.

[0083] Description of labels:

[0084] 1: first lens; 2: second lens; 3: third lens; 4: fourth lens; 5: fifth lens; 6: sixth lens;

[0085] 10: optical lens group;

[0086] 11,21,31,41,51,61,110,410,510: light-emitting surface;

[0087] 12,22,32,42,52,62,120,320: light incident side;

[0088] 15: multi-light source generating unit; 20: projection lens; 15a: light source;

[0089] 100,200,300,400,500:lens;

[0090] 100a: light emitting surface;

[0091] 115,125,215,225,315,325,415,425,515,525,615,625,Z1: optical axis area;

[0092] 116,126,216,226,316,326,416,426,516,526,616,626,Z2: circumferential area;

[0093] 130: assembly unit; 211, 212: parallel light;

[0094] a,b,c,L1,L2,L3,L4,L5: beam;

[0095] A1: light-emitting side; A2: light-entering side; C1: first curve; C2: second curve; CP: center point;

[0096] CP1: first center point; CP2: second center point;

[0097] EDmax: the maximum value of the effective diameters of the first to sixth lenses;

[0098] EDmin: minimum value of the effective diameters of the first to sixth lenses;

[0099] EL: extension line; FS: free-form surface; I: optical axis; LCR: radius of luminous circle; Lm: marginal ray;

[0100] Lc: chief ray; M, R: intersection points; RS: reference surface; RP: reference point; OB: optical boundary;

[0101] ST: aperture; TP1: first transition point; TP2: second transition point; Z3: relay zone; ω: half field of view angle. DETAILED DESCRIPTION

[0102] Please refer to Figure 1A , the light direction of the projection lens 20 is display light or sensing light, which is emitted by the multi-light source generating unit 15, and generates multiple light beams a, b, and c through the optical lens group 10 of the embodiment of the present invention, which can be used to detect the environment in front of the projection lens 20, or as image beams to generate image images. In other words, the light beams a, b, and c are not limited to any form of light beams, and the directions of the light beams are described in the form of dotted lines. The number of light beams a, b, and c is not limited to 3, and the number can be other numbers that are not equal to 3 and 1, and Figure 1A In the figure, beam a, beam b, and beam c are shown as representatives. Figure 1B In one embodiment, the multi-light source generating unit 15 includes a plurality of light sources 15a arranged in an array. In other embodiments, the light sources 15a may be arranged in a ring or in other arrangements, and the present invention is not limited thereto. The light source 15a may be a display light source for projecting display light, or an infrared laser light source for emitting sensing light. The light emitting surfaces of the light sources 15a together form the light emitting surface 100a of the multi-light source generating unit 15.

[0103] The optical specification judgment criteria of the embodiments of the present invention described below are based on the assumption that the light direction is reversely tracked as a parallel light ray from the light emitting side through the optical lens assembly 10 to the light emitting surface 100 a of the multi-light source generating unit 15 to form a focused image.

[0104] The terms "optical axis region", "circumferential region", "concave surface" and "convex surface" used in this specification and the claims should be interpreted based on the definitions listed in this specification.

[0105] The optical lens assembly 10 of the present specification includes at least one lens, which receives light from the incident optical system that is parallel to the optical axis and within a half-viewing angle (HFOV) relative to the optical axis. The so-called "a lens having a positive refractive power (or a negative refractive power)" means that the paraxial refractive power of the lens calculated by Gaussian optical theory is positive (or negative). The so-called "light exit surface (or light entrance surface) of the lens" is defined as a specific range of the light passing through the lens surface. The light includes at least two types of light: the chief ray (chiefray) Lc and the marginal ray (arginal ray) Lm. Figure 2(The light exiting surface or light incident surface of the lens can be divided into different areas according to different positions, including the optical axis area, the circumferential area, or one or more relay areas in some embodiments. The description of these areas will be described in detail below.)

[0106] Figure 2 is a radial cross-sectional view of the lens 100. Two reference points on the surface of the lens 100 are defined: a center point and a transition point. The center point of the lens surface is an intersection of the surface and the optical axis I. Figure 2 For example, the first center point CP1 is located at the light exit surface 110 of the lens 100, and the second center point CP2 is located at the light incident surface 120 of the lens 100. The transition point is a point on the lens surface, and the tangent of the point is perpendicular to the optical axis I. The optical boundary OB of the lens surface is defined as the point where the radially outermost edge ray Lm passing through the lens surface intersects with the lens surface. All transition points are located between the optical axis I and the optical boundary OB of the lens surface. In addition, the surface of the lens 100 may have no transition points or at least one transition point. If a single lens surface has multiple transition points, the transition points are named in sequence from the first transition point in the radial outward direction. For example, the first transition point TP1 (closest to the optical axis I), the second transition point TP2 (closest to the optical axis I), and the second transition point TP2 (closest to the optical axis I). Figure 4 as shown) and the Nth conversion point (farthest from the optical axis I).

[0107] When the lens surface has at least one transition point, the range from the center point to the first transition point TP1 is defined as the optical axis area, wherein the optical axis area includes the center point. The area radially outward from the transition point farthest from the optical axis I (the Nth transition point) to the optical boundary OB is defined as the circumferential area. In some embodiments, a relay area between the optical axis area and the circumferential area may be further included, and the number of relay areas depends on the number of transition points. When the lens surface does not have a transition point, 0% to 50% of the distance from the optical axis I to the optical boundary OB of the lens surface is defined as the optical axis area, and 50% to 100% of the distance from the optical axis I to the optical boundary OB of the lens surface is defined as the circumferential area.

[0108] When a light ray parallel to the optical axis I passes through an area, if the light ray is deflected toward the optical axis I and the intersection with the optical axis I is located at the light entrance side A2 of the lens, then the area is convex. When a light ray parallel to the optical axis I passes through an area, if the extension line of the light ray intersects with the optical axis I at the light exit side A1 of the lens, then the area is concave.

[0109] In addition, see Figure 2The lens 100 may further include an assembly portion 130 extending radially outward from the optical boundary OB. The assembly portion 130 is generally used for assembling the lens 100 to a corresponding component (not shown) of the optical system. Light does not reach the assembly portion 130. The structure and shape of the assembly portion 130 are merely examples for illustrating the present invention and are not intended to limit the scope of the present invention. The assembly portion 130 of the lens discussed below may be partially or completely omitted in the drawings.

[0110] See also Figure 3 , define the area between the center point CP and the first transition point TP1 as the optical axis area Z1. Define the area between the first transition point TP1 and the optical boundary OB of the lens surface as the circumferential area Z2. Figure 3 As shown, after passing through the optical axis region Z1, the parallel light 211 intersects with the optical axis I at the light incident side A2 of the lens 200, that is, the focus of the parallel light 211 passing through the optical axis region Z1 is located at the intersection point R of the light incident side A2 of the lens 200. Since the light intersects with the optical axis I at the light incident side A2 of the lens 200, the optical axis region Z1 is a convex surface. On the contrary, the parallel light 212 diverges after passing through the circumferential region Z2. Figure 3 As shown, the extended line EL of the parallel light 212 after passing through the circumferential area Z2 intersects with the optical axis I at the light-emitting side A1 of the lens 200, that is, the focus of the parallel light 212 passing through the circumferential area Z2 is located at the intersection point M on the light-emitting side A1 of the lens 200. Since the extended line EL of the light intersects with the optical axis I at the light-emitting side A1 of the lens 200, the circumferential area Z2 is a concave surface. Figure 3 In the lens 200 shown, the first transition point TP1 is the boundary between the optical axis area and the circumferential area, that is, the first transition point TP1 is the boundary point where the convex surface turns into the concave surface.

[0111] On the other hand, the surface convexity of the optical axis area can also be determined according to the judgment method of the general knowledgeable person in this field, that is, the convexity of the surface shape of the optical axis area of ​​the lens can be determined by the positive and negative signs of the curvature radius of the paraxial axis (abbreviated as R value). R value can be commonly used in optical design software, such as Zemax or CodeV. R value is also commonly found in the lens data sheet of optical design software. For the light-emitting surface, when the R value is positive, the optical axis area of ​​the light-emitting surface is determined to be convex; when the R value is negative, the optical axis area of ​​the light-emitting surface is determined to be concave. On the contrary, for the light-entering surface, when the R value is positive, the optical axis area of ​​the light-entering surface is determined to be concave; when the R value is negative, the optical axis area of ​​the light-entering surface is determined to be convex. The result of this method is consistent with the result of the above-mentioned determination method by the intersection of the light ray / light extension line and the optical axis. The determination method of the intersection of the light ray / light extension line and the optical axis is to determine the surface convexity by locating the focus of a light ray parallel to the optical axis on the light-emitting side or the light-entering side of the lens. The terms “a region is convex (or concave)”, “a region is convex (or concave)” or “a convex (or concave) region” described in this specification can be used interchangeably.

[0112] Figures 4 to 6 Examples are provided for determining the surface shape and area boundaries of lens areas in various situations, including the aforementioned optical axis area, circumferential area, and relay area.

[0113] Figure 4 is a radial cross-sectional view of the lens 300. Figure 4 , the light incident surface 320 of the lens 300 has only one transition point TP1 within the optical boundary OB. The optical axis area Z1 and the circumferential area Z2 of the light incident surface 320 of the lens 300 are as follows: Figure 4 The R value of the light incident surface 320 is positive (ie, R>0), and therefore, the optical axis region Z1 is a concave surface.

[0114] Generally speaking, the shapes of the areas bounded by the conversion point are opposite to those of the adjacent areas. Therefore, the conversion point can be used to define the transition of the surface shape, that is, from concave to convex or from convex to concave. Figure 4 In the figure, since the optical axis area Z1 is a concave surface, the surface shape changes at the transition point TP1, so the circumferential area Z2 is a convex surface.

[0115] Figure 5 is a radial cross-sectional view of the lens 400. Figure 5 , there is a first transition point TP1 and a second transition point TP2 on the light-emitting surface 410 of the lens 400. The area between the optical axis I and the first transition point TP1 is defined as the optical axis region Z1 of the light-emitting surface 410. The R value of the light-emitting surface 410 is positive (ie, R>0), and therefore, the optical axis region Z1 is a convex surface.

[0116] The area between the second transition point TP2 and the optical boundary OB of the light-emitting surface 410 of the lens 400 is defined as a circumferential area Z2, and the circumferential area Z2 of the light-emitting surface 410 is also a convex surface. In addition, the area between the first transition point TP1 and the second transition point TP2 is defined as a relay area Z3, and the relay area Z3 of the light-emitting surface 410 is a concave surface. Figure 5 , the light-emitting surface 410 includes, radially outward from the optical axis I, an optical axis region Z1 between the optical axis I and the first conversion point TP1, a relay region Z3 between the first conversion point TP1 and the second conversion point TP2, and a circumferential region Z2 between the second conversion point TP2 and the optical boundary OB of the light-emitting surface 410 of the lens 400. Since the optical axis region Z1 is a convex surface, the surface shape changes from the first conversion point TP1 to a concave surface, so the relay region Z3 is a concave surface, and the surface shape changes from the second conversion point TP2 to a convex surface, so the circumferential region Z2 is a convex surface.

[0117] Figure 6 is a radial cross-sectional view of the lens 500. The light exit surface 510 of the lens 500 has no transition point. For a lens surface without a transition point, such as the light exit surface 510 of the lens 500, 0% to 50% of the distance from the optical axis I to the optical boundary OB of the lens surface is defined as the optical axis area, and 50% to 100% of the distance from the optical axis I to the optical boundary OB of the lens surface is defined as the circumferential area. Figure 6 The lens 500 shown in the figure defines the optical axis region Z1 of the light-emitting surface 510 as 50% of the distance from the optical axis I to the optical boundary OB of the lens 500 surface. The R value of the light-emitting surface 510 is positive (i.e., R>0), and therefore, the optical axis region Z1 is a convex surface. Since the light-emitting surface 510 of the lens 500 has no transition point, the circumferential region Z2 of the light-emitting surface 510 is also a convex surface. The lens 500 may further have an assembly portion (not shown) extending radially outward from the circumferential region Z2.

[0118] Figure 7 is a schematic diagram of an optical lens assembly according to a first embodiment of the present invention, and FIG. 8A to FIG. 8D The longitudinal spherical aberration and various aberration diagrams of the optical lens set of the first embodiment. Figure 7In the optical lens set 10 of the first embodiment of the present invention, from the light-emitting side to the light-entering side, along an optical axis I of the optical lens set 10, an aperture ST, a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5 and a sixth lens 6 are sequentially included. When the light beams L1, L2, L3, L4 and L5 emitted from the light-emitting surface 100a of the multi-light source generating unit 15 enter the optical lens set 10, they sequentially pass through the sixth lens 6, the fifth lens 5, the fourth lens 4, the third lens 3, the second lens 2, the first lens 1 and the aperture ST to generate a plurality of light beams, which are emitted from the optical lens set 10. It is worth mentioning that the light-entering side A2 is one side facing the multi-light source generating unit 15, and the other side opposite is the light-emitting side A1. It is worth mentioning that in the optical lens set 10, the lenses having refractive power are only the above-mentioned six lenses, namely the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5 and the sixth lens 6. Furthermore, the materials of the first lens 1 , the second lens 2 , the third lens 3 , the fourth lens 4 , the fifth lens 5 and the sixth lens 6 may be plastic or glass.

[0119] On the other hand, the light beams L1 and L2 are light beams emitted near the centroid (i.e., the center of the shape) of the light emitting surface 100a, and can be defined as the central light beams of the light emitting surface 100a. The light beams L3, L4, and L5 are light beams emitted at the edge of the light emitting surface 100a, and can be defined as the edge light beams of the light emitting surface 100a.

[0120] In the present embodiment, the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5 and the sixth lens 6 of the optical lens group 10 each have a light emitting surface 11, a light emitting surface 21, a light emitting surface 31, a light emitting surface 41, a light emitting surface 51 and a light emitting surface 61 facing the light emitting side A1 and allowing the light beams L1 to L5 to pass through; and each have a light incident surface 12, a light incident surface 22, a light incident surface 32, a light incident surface 42, a light incident surface 52 and a light incident surface 62 facing the light incident side A2 and allowing the light beams L1 to L5 to pass through.

[0121] The first lens 1 is the sixth lens having a refractive power from the light incident side A2 to the light exit side A1. The first lens 1 has a negative refractive power. The optical axis region 115 and the circumferential region 116 of the light exit surface 11 of the first lens 1 are both convex surfaces, and the optical axis region 125 and the circumferential region 126 of the light incident surface 12 of the first lens 1 are both concave surfaces.

[0122] The second lens 2 is the fifth lens having a refractive power from the light incident side A2 to the light exit side A1. The second lens 2 has a positive refractive power. The optical axis region 215 and the circumferential region 216 of the light exit surface 21 of the second lens 2 are both convex surfaces, and the optical axis region 225 and the circumferential region 226 of the light incident surface 22 of the second lens 2 are both concave surfaces.

[0123] The third lens 3 is the fourth lens having a refractive power from the light incident side A2 to the light exit side A1. The third lens 3 has a positive refractive power. The optical axis region 315 of the light exit surface 31 of the third lens 3 is a convex surface, and the circumferential region 316 of the light exit surface 31 is a concave surface. The optical axis region 325 and the circumferential region 326 of the light incident surface 32 of the third lens 3 are both convex surfaces.

[0124] The fourth lens 4 is the third lens having a refractive power from the light incident side A2 to the light exit side A1. The fourth lens 4 has a negative refractive power. The optical axis region 415 and the circumferential region 416 of the light exit surface 41 of the fourth lens 4 are both concave. The optical axis region 425 of the light incident surface 42 of the fourth lens 4 is a concave surface, and the circumferential region 426 of the light incident surface 42 is a convex surface.

[0125] The fifth lens 5 is the second lens having a refractive power from the light incident side A2 to the light exit side A1. The fifth lens 5 has a positive refractive power. The optical axis region 515 of the light exit surface 51 of the fifth lens 5 is a convex surface, and the circumferential region 516 of the light exit surface 51 is a concave surface. The optical axis region 525 of the light incident surface 52 of the fifth lens 5 is a concave surface, and the circumferential region 526 of the light incident surface 52 is a convex surface.

[0126] The sixth lens 6 is the first lens having a refractive power from the light incident side A2 to the light exit side A1. The sixth lens 6 has a negative refractive power. The optical axis region 615 of the light exit surface 61 of the sixth lens 6 is a convex surface, and the circumferential region 616 of the light exit surface 31 is a concave surface. The optical axis region 625 of the light incident surface 62 of the sixth lens 6 is a concave surface, and the circumferential region 626 is a convex surface.

[0127] On the other hand, in this embodiment and the embodiments described below, the optical lens assembly 10 can also satisfy the following condition when applied to a projection lens: EDmax / EDmin≦2.100. EDmax is the maximum effective diameter of the first lens 1 to the sixth lens 6. Figure 7 In the vertical direction of the optical axis A of the optical lens group 10, the lens with the largest effective diameter (i.e., the diameter of the surface shape of the lens that allows the light beam to pass through) is the diameter of the light incident surface 62 of the sixth lens 6, so Figure 7 Schematically plots half of the maximum effective diameter, i.e., 0.5*EDmax. Similarly, EDmin is the minimum effective diameter of the first lens 1 to the sixth lens 6. For example, Figure 7 In the vertical direction of the optical axis I of the optical lens group 10, the lens with the smallest effective diameter is the diameter of the light exit surface 11 of the first lens 1, so Figure 7The diagram schematically shows half of the minimum effective diameter, that is, 0.5*EDmin. Therefore, when the optical lens assembly 10 is applied to a projection lens, EDmax and EDmin may also represent the maximum effective diameter and the minimum effective diameter of the projection lens, respectively.

[0128] Other detailed optical data of the first embodiment are as follows Fig. 9 As shown, the effective focal length (EFL) of the overall system of the optical lens assembly 10 of the first embodiment is 3.125 millimeters (Millimiter, mm), the half field of view (HFOV) is 37.200°, the aperture value (F-number, Fno) is 1.510, and the system length (TTL) is 4.617 millimeters, wherein the system length refers to the distance from the light incident surface 11 of the first lens 1 to the light emitting surface 100a on the optical axis I. The "aperture value" in this specification is the aperture value calculated by considering the aperture ST as the incident pupil based on the principle of reversibility of light. The image height (ImgH) is 2.005.

[0129] In addition, in this embodiment, the light emitting surfaces 11, 21, 31, 41, 51, 61 and the light incident surfaces 12, 22, 32, 42, 52, 62 of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5 and the sixth lens 6, a total of 12 surfaces, are aspherical surfaces, wherein the light emitting surfaces 11, 21, 31, 41, 51, 61 and the light incident surfaces 12, 22, 32, 42, 52, 62 are general even asphere surfaces. These aspherical surfaces are defined according to the following formulas:

[0130]

[0131] in:

[0132] Y: the distance between the point on the aspheric curve and the optical axis I;

[0133] Z: Depth of the aspherical surface (the vertical distance between the point on the aspherical surface that is Y away from the optical axis I and the tangent plane that is tangent to the vertex on the aspherical surface on the optical axis I);

[0134] R: radius of curvature of the lens surface at the near optical axis I;

[0135] K: conic constant;

[0136] a i : i-th order aspheric coefficient;

[0137] The aspheric coefficients of the various items in formula (1) from the light exiting surface 11 of the first lens 1 to the light incident surface 62 of the sixth lens 6 are as follows: Fig.10 As shown. Among them, Fig.10 The field number 11 in the middle represents the aspheric coefficient of the light exit surface 11 of the first lens 1 , and the same applies to other fields.

[0138] In addition, the relationship between the important parameters of the optical imaging lens 10 of the first embodiment is as follows: Fig.43 shown.

[0139] in,

[0140] T1 is the thickness of the first lens 1 on the optical axis I;

[0141] T2 is the thickness of the second lens 2 on the optical axis I;

[0142] T3 is the thickness of the third lens 3 on the optical axis I;

[0143] T4 is the thickness of the fourth lens 4 on the optical axis I;

[0144] T5 is the thickness of the fifth lens 5 on the optical axis I;

[0145] T6 is the thickness of the sixth lens 6 on the optical axis I;

[0146] G12: The air gap between the first lens 1 and the second lens 2 on the optical axis I;

[0147] G23 is the air gap between the second lens 2 and the third lens 3 on the optical axis I;

[0148] G34 is the air gap between the third lens 3 and the fourth lens 4 on the optical axis I;

[0149] G45 is the air gap between the fourth lens 4 and the fifth lens 5 on the optical axis I;

[0150] G56 is an air gap between the fifth lens 5 and the sixth lens 6 on the optical axis I;

[0151] AAG is the sum of five air gaps of the first lens 1 to the sixth lens 6 on the optical axis I, that is, the sum of G12, G23, G34, G45 and G56;

[0152] ALT is the sum of six thicknesses of the first lens 1 to the sixth lens 6 on the optical axis I, that is, the sum of T1, T2, T3, T4, T5 and T6;

[0153] TL is the distance between the light exiting surface 11 of the first lens 1 and the light incident surface 62 of the sixth lens 6 on the optical axis I;

[0154] TTL is the distance from the light exiting surface 11 of the first lens 1 to the light emitting surface 100a on the optical axis I, which can also be understood as the system length;

[0155] BFL is the distance from the light incident surface 62 of the sixth lens 6 to the light emitting surface 100a on the optical axis I;

[0156] LCR (Light circle radius) is the radius of the light circle (marked as LCR, such as Figure 1B ), is the radius of the minimum circumscribed circle of the light emitting surface 100a of the multi-light source generating unit 15, and is also the image height of the optical lens group;

[0157] HFOV is the half field of view (denoted by ω, such as Figure 1A ), is the maximum half light output angle of the optical lens assembly 10;

[0158] Fno is an aperture value, which is an aperture value calculated based on the principle of reversibility of light for the effective aperture of the light beam emitted by the optical lens assembly 10. In the embodiment of the present invention, the aperture ST is regarded as an aperture value calculated based on the incident pupil.

[0159] EFL is the effective focal length of the optical lens assembly 10 .

[0160] In addition, define:

[0161] G6P is the air gap between the light incident surface 62 of the sixth lens 6 and the light emitting surface 100a on the optical axis I;

[0162] f1 is the focal length of the first lens 1;

[0163] f2 is the focal length of the second lens 2;

[0164] f3 is the focal length of the third lens 3;

[0165] f4 is the focal length of the fourth lens 4;

[0166] f5 is the focal length of the fifth lens 5;

[0167] f6 is the focal length of the sixth lens 6;

[0168] n1 is the nd refractive index of the first lens 1;

[0169] n2 is the nd refractive index of the second lens 2;

[0170] n3 is the nd refractive index of the third lens 3;

[0171] n4 is the nd refractive index of the fourth lens 4;

[0172] n5 is the nd refractive index of the fifth lens 5;

[0173] n6 is the nd refractive index of the sixth lens 6;

[0174] V1 is the Vd Abbe number of the first lens 1;

[0175] V2 is the Vd Abbe number of the second lens 2;

[0176] V3 is the Vd Abbe number of the third lens 3;

[0177] V4 is the Vd Abbe number of the fourth lens 4;

[0178] V5 is the Vd Abbe number of the fifth lens 5; and

[0179] V6 is the Vd Abbe number of the sixth lens 6 .

[0180] It is worth mentioning that the material parameters of the lens disclosed in the optical parameter table of this specification adopt the nd refractive index and Vd Abbe number format of the International Glass Code, so that those skilled in the art can know the specific material implementation. Among them, nd is the refractive index of the material at the d helium yellow line 587.56 nanometers (nm), and Vd is calculated based on the refractive index of the material at the d, F and C wavelengths of the Fraunhofer spectrum. The focal length value disclosed in the optical parameter table of the embodiment is calculated based on the refractive index of the wavelength band implemented by the optical system, and the primary wavelength (primary wavelength) implemented in the embodiment of the present invention is 525nm, so the focal length value of the present invention is calculated based on the refractive index of the material at 525nm.

[0181] Also refer to FIG. 8A to FIG. 8D , Fig. 8A The diagram of the first embodiment illustrates the longitudinal spherical aberration (Longitudinal Spherical Aberration), Figure 8B and Figure 8C The figures respectively illustrate the field curvature aberration in the sagittal direction and the field curvature aberration in the tangential direction on the projection surface of the first embodiment when the wavelength is 507nm, 525nm and 543nm. Fig.8D The diagrams illustrate the distortion aberration of the first embodiment on the projection plane when the wavelength is 507nm, 525nm and 543nm.

[0182] The longitudinal spherical aberration of the first embodiment is as follows: Fig. 8AAs shown, the curves formed by each wavelength are very close and close to the middle, indicating that the off-axis light rays of different heights of each wavelength are concentrated near the imaging point. It can be seen from the deflection amplitude of the curve of each wavelength that the imaging point deviation of the off-axis light rays of different heights is controlled within the range of ±0.02 mm. Therefore, the first embodiment does significantly improve the spherical aberration of the same wavelength. In addition, the distances between the three representative wavelengths are also very close to each other, representing that the imaging positions of the light rays of different wavelengths are already very concentrated, thereby significantly improving the chromatic aberration.

[0183] exist Figure 8B and Figure 8C In the two field curvature aberration diagrams, the focal length variation of the three representative wavelengths in the entire field of view falls within ±0.04 mm, indicating that the optical lens assembly 10 of the first embodiment can effectively eliminate aberrations. Fig.8D The distortion aberration diagram shows that the distortion aberration of the first embodiment is maintained within the range of ±16%, indicating that the distortion aberration of the first embodiment meets the projection quality of the optical lens group 10. Therefore, compared with the existing optical lens group, the first embodiment can still provide good imaging quality under the condition that the system length has been shortened to about 4.617 mm. Therefore, the first embodiment can shorten the projection lens length and provide good projection image quality while maintaining good optical performance.

[0184] Fig.11 is a schematic diagram of an optical lens assembly according to a second embodiment of the present invention, and FIG. 12A to FIG. 12D The longitudinal spherical aberration and various aberration diagrams of the optical lens set of the second embodiment. Fig.11 , a second embodiment of the optical lens assembly 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: the optical data, aspheric coefficients, and parameters of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, and the sixth lens 6 are more or less different. In addition, in this embodiment, the circumferential area 126 of the light incident surface 12 of the first lens 1 is a convex surface; the circumferential area 316 of the light emitting surface 31 of the third lens 3 is a convex surface; and the circumferential area 426 of the light incident surface 42 of the fourth lens 4 is a concave surface. It is particularly noted that in order to clearly display the drawings, Fig.11 The reference numerals of some optical axis areas and circumferential areas having similar surface shapes to those of the first embodiment are omitted.

[0185] Detailed optical data of the optical imaging lens 10 of the second embodiment are as follows: Fig.13 As shown, the effective focal length of the optical imaging lens 10 of the second embodiment is 3.793 mm, the half field of view (HFOV) is 37.200°, the aperture value (Fno) is 1.832, the system length (TTL) is 4.723 mm, and the image height (ImgH) is 2.966 mm.

[0186] like Fig.14 As shown, the aspheric coefficients of the light exiting surface 11 of the first lens 1 to the light incident surface 62 of the sixth lens 6 in formula (1) of the second embodiment are shown.

[0187] In addition, the relationship between the important parameters of the optical imaging lens 10 of the second embodiment is as follows: Fig.43 shown.

[0188] The longitudinal spherical aberration of the second embodiment is as follows: Fig. 12A As shown in the figure, the imaging point deviation of off-axis light at different heights is controlled within the range of ±0.03 mm. Fig. 12B and Fig. 12C In the two field curvature aberration diagrams, the focal length variation of the three representative wavelengths within the entire field of view falls within ±0.2 mm. Fig.12D The distortion aberration diagram shows that the distortion aberration of the second embodiment is maintained within the range of ±5%.

[0189] From the above description, it can be known that the distortion of the second embodiment is better than that of the first embodiment, and the second embodiment also has a larger image height.

[0190] Fig.15 is a schematic diagram of an optical lens assembly according to a third embodiment of the present invention, and FIG. 16A to FIG. 16D The longitudinal spherical aberration and various aberration diagrams of the optical lens set of the third embodiment. Fig.15 , a third embodiment of the optical lens assembly 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: the optical data, aspheric coefficients, and parameters of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, and the sixth lens 6 are more or less different. In addition, in this embodiment, the circumferential area 426 of the light incident surface 42 of the fourth lens 4 is a concave surface. It is particularly noted that in order to clearly show the drawing, Fig.15 The reference numerals of some optical axis areas and circumferential areas having similar surface shapes to those of the first embodiment are omitted.

[0191] Detailed optical data of the optical imaging lens 10 of the third embodiment are as follows: Fig.17 As shown, the effective focal length of the optical imaging lens 10 of the third embodiment is 3.197 mm, the half field of view (HFOV) is 37.200°, the aperture value (Fno) is 1.544, the system length (TTL) is 4.327 mm, and the image height (ImgH) is 2.174 mm.

[0192] like Fig.18 As shown, the aspheric coefficients of the light exiting surface 11 of the first lens 1 to the light incident surface 62 of the sixth lens 6 in the formula (1) of the third embodiment are shown.

[0193] In addition, the relationship between the important parameters of the optical imaging lens 10 of the third embodiment is as follows: Fig.43 shown.

[0194] The longitudinal spherical aberration of the third embodiment is as follows: Fig.16A As shown in the figure, the imaging point deviation of off-axis light at different heights is controlled within the range of ±0.016 mm. Fig. 16B and Fig. 16C In the two field curvature aberration diagrams, the focal length variation of the three representative wavelengths in the entire field of view falls within ±0.07 mm. Fig.16D The distortion aberration diagram shows that the distortion aberration of the third embodiment is maintained within the range of ±12%.

[0195] It can be seen from the above description that the system length of the third embodiment is shorter than that of the first embodiment, the longitudinal spherical aberration and distortion of the third embodiment are better than those of the first embodiment, and the third embodiment also has a larger image height.

[0196] Fig.19 is a schematic diagram of an optical lens assembly according to a fourth embodiment of the present invention, and FIG. 20A to FIG. 20D The longitudinal spherical aberration and various aberration diagrams of the optical lens set of the fourth embodiment. Fig.19 , a fourth embodiment of the optical lens assembly 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: the optical data, aspheric coefficients, and parameters of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, and the sixth lens 6 are more or less different. In addition, in this embodiment, the circumferential area 426 of the light incident surface 42 of the fourth lens 4 is a concave surface. It is particularly noted that in order to clearly show the drawing, Fig.19 The reference numerals of some optical axis areas and circumferential areas having similar surface shapes to those of the first embodiment are omitted.

[0197] Detailed optical data of the optical imaging lens 10 of the fourth embodiment are as follows: Fig.21 As shown, the effective focal length of the optical imaging lens 10 of the fourth embodiment is 3.203 mm, the half field of view (HFOV) is 37.200°, the aperture value (Fno) is 1.547, the system length (TTL) is 4.316 mm, and the image height (ImgH) is 2.210 mm.

[0198] like Fig. 22 As shown in FIG. 1 , the aspheric coefficients of the light exiting surface 11 of the first lens 1 to the light incident surface 62 of the sixth lens 6 in formula (1) of the fourth embodiment are shown.

[0199] In addition, the relationship between the important parameters of the optical imaging lens 10 of the fourth embodiment is as follows: Fig.44 shown.

[0200] The longitudinal spherical aberration of the fourth embodiment is as follows: Fig. 20A As shown in the figure, the imaging point deviation of off-axis light at different heights is controlled within the range of ±0.016 mm. Fig. 20B and Fig. 20C In the two field curvature aberration diagrams, the focal length variation of the three representative wavelengths within the entire field of view falls within ±0.06 mm. Fig.20D The distortion aberration diagram shows that the distortion aberration of the fourth embodiment is maintained within the range of ±10%.

[0201] From the above description, it can be known that the system length of the fourth embodiment is shorter than that of the first embodiment, the longitudinal spherical aberration and distortion of the fourth embodiment are better than those of the first embodiment, and the fourth embodiment also has a larger image height.

[0202] Fig.23 is a schematic diagram of an optical lens assembly according to a fifth embodiment of the present invention, and FIG. 24A to FIG. 24D The longitudinal spherical aberration and various aberration diagrams of the optical lens set of the fifth embodiment. Fig.23 , a fifth embodiment of the optical lens group 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: the optical data, aspheric coefficients and parameters between the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5 and the sixth lens 6 are more or less different. In addition, in this embodiment, the circumferential area 226 of the light incident surface 22 of the second lens 2 is a convex surface. The circumferential area 316 of the light emitting surface 31 of the third lens 3 is a convex surface. The circumferential area 426 of the light incident surface 42 of the fourth lens 4 is a concave surface. It is particularly noted that in order to clearly display the drawings, Fig.23 The reference numerals of some optical axis areas and circumferential areas having similar surface shapes to those of the first embodiment are omitted.

[0203] Detailed optical data of the optical imaging lens 10 of the fifth embodiment are as follows: Fig.25 As shown, the effective focal length of the optical imaging lens 10 of the fifth embodiment is 3.198 mm, the half field of view (HFOV) is 37.200°, the aperture value (Fno) is 1.545, the system length (TTL) is 4.504 mm, and the image height (ImgH) is 2.128 mm.

[0204] like Fig.26 As shown, the aspheric coefficients of the light exiting surface 11 of the first lens 1 to the light incident surface 62 of the sixth lens 6 in the formula (1) of the fifth embodiment are shown.

[0205] In addition, the relationship between the important parameters of the optical imaging lens 10 of the fifth embodiment is as follows: Fig.44 shown.

[0206] The longitudinal spherical aberration of the fifth embodiment is as follows: Fig.24A As shown in the figure, the imaging point deviation of off-axis light at different heights is controlled within the range of ±0.008 mm. Fig. 24B and Fig.24C In the two field curvature aberration diagrams, the focal length variation of the three representative wavelengths in the entire field of view falls within ±0.04 mm. Fig.24D The distortion aberration diagram shows that the distortion aberration of the fifth embodiment is maintained within the range of ±16%.

[0207] From the above description, it can be known that the system length of the fifth embodiment is shorter than that of the first embodiment, the longitudinal spherical aberration and distortion of the fifth embodiment are better than those of the first embodiment, and the fifth embodiment also has a larger image height.

[0208] Fig. 27 is a schematic diagram of an optical lens assembly according to a sixth embodiment of the present invention, and FIG. 28A to FIG. 28D The longitudinal spherical aberration and various aberration diagrams of the optical lens assembly of the sixth embodiment. Fig. 27 , a sixth embodiment of the optical lens group 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: the optical data, aspheric coefficients and parameters between the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5 and the sixth lens 6 are more or less different. In addition, in this embodiment, the circumferential area 226 of the light incident surface 22 of the second lens 2 is a convex surface. The circumferential area 316 of the light emitting surface 31 of the third lens 3 is a convex surface. The circumferential area 426 of the light incident surface 42 of the fourth lens 4 is a concave surface. It is particularly noted that in order to clearly display the drawings, Fig. 27 The reference numerals of some optical axis areas and circumferential areas having similar surface shapes to those of the first embodiment are omitted.

[0209] Detailed optical data of the optical imaging lens 10 of the sixth embodiment are as follows: Fig.29 As shown, the effective focal length of the optical imaging lens 10 of the sixth embodiment is 3.300 mm, the half field of view (HFOV) is 37.200°, the aperture value (Fno) is 1.594, the system length (TTL) is 4.501 mm, and the image height (ImgH) is 2.279 mm.

[0210] like Fig.30 As shown in FIG. 1 , the aspheric coefficients of the light exiting surface 11 of the first lens 1 to the light incident surface 62 of the sixth lens 6 in formula (1) are shown in FIG. 1 .

[0211] In addition, the relationship between the important parameters of the optical imaging lens 10 of the sixth embodiment is as follows: Fig.44 shown.

[0212] The longitudinal spherical aberration of the sixth embodiment is as follows: Fig.28AAs shown in the figure, the imaging point deviation of off-axis light at different heights is controlled within the range of ±0.01 mm. Fig.28B and Fig.28C In the two field curvature aberration diagrams, the focal length variation of the three representative wavelengths within the entire field of view falls within ±0.06 mm. Fig.28D The distortion diagram shows that the distortion of the sixth embodiment is maintained within the range of ±10%.

[0213] From the above description, it can be known that the system length of the sixth embodiment is shorter than that of the first embodiment, the longitudinal spherical aberration and distortion of the sixth embodiment are better than those of the first embodiment, and the sixth embodiment also has a larger image height.

[0214] Fig.31 is a schematic diagram of an optical lens assembly according to a seventh embodiment of the present invention, and FIG. 32A to FIG. 32D The longitudinal spherical aberration and various aberration diagrams of the optical lens set of the seventh embodiment. Fig.31 , a seventh embodiment of the optical lens group 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: the optical data, aspheric coefficients and parameters between the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5 and the sixth lens 6 are more or less different. In addition, in this embodiment, the circumferential area 116 of the light-emitting surface 11 of the first lens 1 is a concave surface. The optical axis area 225 and the circumferential area 226 of the light-entering surface 22 of the second lens 2 are both convex surfaces. The third lens 3 has a negative refractive power, and the optical axis area 315 of the light-emitting surface 31 of the third lens 3 is a concave surface, and the optical axis area 325 of the light-entering surface 32 of the third lens 3 is a concave surface. The optical axis area 415 of the light-emitting surface 41 of the fourth lens 4 is a convex surface, and the circumferential area 426 of the light-entering surface 42 of the fourth lens 4 is a concave surface. It is particularly noted that in order to clearly display the drawings, Fig.31 The reference numerals of some optical axis areas and circumferential areas having similar surface shapes to those of the first embodiment are omitted.

[0215] Detailed optical data of the optical imaging lens 10 of the seventh embodiment are as follows: Fig.33 As shown, the effective focal length of the optical imaging lens 10 of the seventh embodiment is 3.131 mm, the half field of view (HFOV) is 37.200°, the aperture value (Fno) is 1.513, the system length (TTL) is 4.518 mm, and the image height (ImgH) is 2.119 mm.

[0216] like Fig.34 As shown, the aspheric coefficients of the light exiting surface 11 of the first lens 1 to the light incident surface 62 of the sixth lens 6 in the seventh embodiment are shown in the formula (1).

[0217] In addition, the relationship between the important parameters of the optical imaging lens 10 of the seventh embodiment is as follows: Fig.45 shown.

[0218] The longitudinal spherical aberration of the seventh embodiment is as follows: Fig.32A As shown in the figure, the imaging point deviation of off-axis light at different heights is controlled within the range of ±0.014 mm. Fig.32B and Fig.32C In the two field curvature aberration diagrams, the focal length variation of the three representative wavelengths within the entire field of view falls within ±0.10 mm. Fig.32D The distortion diagram shows that the distortion of the seventh embodiment is maintained within the range of ±12%.

[0219] From the above description, it can be known that the system length of the seventh embodiment is shorter than that of the first embodiment, the longitudinal spherical aberration and distortion of the seventh embodiment are better than those of the first embodiment, and the seventh embodiment also has a larger image height.

[0220] Fig.35 is a schematic diagram of an optical lens assembly according to an eighth embodiment of the present invention, and FIG. 36A to FIG. 36D The longitudinal spherical aberration and various aberration diagrams of the optical lens set of the eighth embodiment. Fig.35 , an eighth embodiment of the optical lens group 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: the optical data, aspheric coefficients and parameters between the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5 and the sixth lens 6 are more or less different. In addition, in this embodiment, the circumferential area 116 of the light-emitting surface 11 of the first lens 1 is a concave surface, and the circumferential area 126 of the light-entering surface 12 is a convex surface. The circumferential area 316 of the light-emitting surface 31 of the third lens 3 is a convex surface. The circumferential area 416 of the light-emitting surface 41 of the fourth lens 4 is a convex surface, and the optical axis area 425 of the light-entering surface 42 of the fourth lens 4 is a convex surface, and the circumferential area 426 of the light-entering surface 42 is a concave surface. The circumferential area 526 of the light-entering surface 52 of the fifth lens 5 is a concave surface. It should be particularly noted that in order to clearly display the drawings, Fig.35 The reference numerals of some optical axis areas and circumferential areas having similar surface shapes to those of the first embodiment are omitted.

[0221] Detailed optical data of the optical imaging lens 10 of the eighth embodiment are as follows: Fig.37 As shown, the effective focal length of the optical imaging lens 10 of the eighth embodiment is 3.426 mm, the half field of view (HFOV) is 37.200°, the aperture value (Fno) is 1.655, the system length (TTL) is 4.467 mm, and the image height (ImgH) is 2.720 mm.

[0222] like Fig.38As shown, the aspheric coefficients of the light exiting surface 11 of the first lens 1 to the light incident surface 62 of the sixth lens 6 in the formula (1) of the eighth embodiment are shown.

[0223] In addition, the relationship between the important parameters of the optical imaging lens 10 of the eighth embodiment is as follows: Fig.45 shown.

[0224] The longitudinal spherical aberration of the eighth embodiment is as follows: Fig.36A As shown in the figure, the imaging point deviation of off-axis light at different heights is controlled within the range of ±0.02 mm. Fig.36B and Fig.36C In the two field curvature aberration diagrams, the focal length variation of the three representative wavelengths within the entire field of view falls within ±0.10 mm. Fig.36D The distortion diagram shows that the distortion of the eighth embodiment is maintained within the range of ±7%.

[0225] It can be seen from the above description that the system length of the eighth embodiment is shorter than that of the first embodiment, the distortion of the eighth embodiment is better than that of the first embodiment, and the eighth embodiment also has a larger image height.

[0226] Fig.39 is a schematic diagram of an optical lens assembly according to a ninth embodiment of the present invention, and FIG. 40A to FIG. 40D The longitudinal spherical aberration and various aberration diagrams of the optical lens set of the ninth embodiment. Fig.39 , a ninth embodiment of the optical lens group 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: the optical data, aspheric coefficients and parameters between the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5 and the sixth lens 6 are more or less different. In addition, in this embodiment, the circumferential area 226 of the light incident surface 22 of the second lens 2 is a convex surface. The circumferential area 316 of the light exit surface 31 of the third lens 3 is a convex surface, and the circumferential area 326 of the light incident surface 32 of the third lens 3 is a concave surface. The circumferential area 416 of the light exit surface 41 of the fourth lens 4 is a convex surface, and the optical axis area 425 of the light incident surface 42 of the fourth lens 4 is a convex surface, and the circumferential area 426 of the light incident surface 42 is a concave surface. The sixth lens 6 has a positive refractive power. It is particularly noted that in order to clearly display the drawings, Fig.39 The reference numerals of some optical axis areas and circumferential areas having similar surface shapes to those of the first embodiment are omitted.

[0227] Detailed optical data of the optical imaging lens 10 of the ninth embodiment are as follows: Fig.41As shown, the effective focal length of the optical imaging lens 10 of the ninth embodiment is 3.011 mm, the half field of view (HFOV) is 37.200°, the aperture value (Fno) is 1.454, the system length (TTL) is 4.333 mm, and the image height (ImgH) is 2.283 mm.

[0228] like Fig.42 As shown in FIG. 1 , the aspheric coefficients of the light exiting surface 11 of the first lens 1 to the light incident surface 62 of the sixth lens 6 in formula (1) are shown in FIG. 1 .

[0229] In addition, the relationship between the important parameters of the optical imaging lens 10 of the ninth embodiment is as follows: Fig.45 shown.

[0230] The longitudinal spherical aberration of the ninth embodiment is as follows: Fig.40A As shown in the figure, the imaging point deviation of off-axis light at different heights is controlled within the range of ±0.012 mm. Fig.40B and Fig.40C In the two field curvature aberration diagrams, the focal length variation of the three representative wavelengths in the entire field of view falls within ±0.12 mm. Fig.40D The distortion diagram shows that the distortion of the ninth embodiment is maintained within the range of ±5%.

[0231] It can be seen from the above description that the system length of the ninth embodiment is shorter than that of the first embodiment, the distortion of the ninth embodiment is better than that of the first embodiment, and the ninth embodiment also has a larger image height.

[0232] In summary, when the optical lens assembly 10 satisfies EDmax / EDmin≦2.100, it is helpful to effectively collect the main light and edge light emitted by the multi-light source generating unit 15 from the light incident side A2, so that they can be projected to the light exiting side A1 with a high proportion, thereby improving the projection effect. When each embodiment meets the conditions that the first lens 1 has a negative refractive power, the fourth lens 4 has a negative refractive power, the circumferential area 516 of the light exiting surface 51 of the fifth lens 5 is a concave surface, and the circumferential area 626 of the light incident surface 62 of the sixth lens 6 is a convex surface, it can converge light at different angles and correct the aberration of the central field of view of the projected imaging surface. In addition, when the surface shape of the circumferential area of ​​a specific lens is matched and the conditional expression V1+V2+V3≦140 is satisfied, it is helpful to provide an optical lens assembly 10 with better projection quality and better chromatic aberration. In some embodiments, the better limit can be 97≦V1+V2+V3≦131.

[0233] In some embodiments, when the second lens element 2 has a positive refractive power and the fifth lens element 5 has a positive refractive power, the assembly yield and the imaging quality can be further improved.

[0234] In some embodiments, when the optical lens group 10 satisfies EDmax / EDmin≦2.100, and further meets the conditions that the first lens 1 has a negative refractive power, the optical axis region 115 of the light exit surface 11 of the first lens 1 is a convex surface, the fourth lens 4 has a negative refractive power, the circumferential region 516 of the light exit surface 51 of the fifth lens 5 is a concave surface, and the optical axis region 625 of the light entrance surface 62 of the sixth lens 6 is a concave surface, it can converge light rays of different angles and correct the aberration of the central field of view of the imaging surface of the projection screen. In addition, when the surface shape of the circumferential region of a specific lens is matched and the conditional expression V1+V3≦100 is satisfied, it is beneficial to provide an optical lens group 10 with better projection quality and better chromatic aberration. In some embodiments, the preferred limit is 56≦V1+V3≦94. In addition, when the second lens 2 has a positive refractive power and the fifth lens 5 has a positive refractive power, the assembly yield and imaging quality can be improved.

[0235] In some embodiments, when the optical lens group 10 satisfies EDmax / EDmin≦2.100, and further meets the condition that the first lens 1 has a negative refractive power, the optical axis area 115 of the light exit surface 11 of the first lens 1 is a convex surface, the circumferential area 216 of the light exit surface 21 of the second lens 2 is a convex surface, the fourth lens 4 has a negative refractive power, and the optical axis area 625 of the light entrance surface 62 of the sixth lens 6 is a concave surface, and the circumferential area 626 is a convex surface, it can converge light rays of different angles and correct the aberration of the central field of view of the imaging surface of the projection screen. In addition, when the surface shape of the circumferential area of ​​a specific lens is matched and the conditional expression V1+V3≦100 is satisfied, it is beneficial to provide an optical lens group 10 with better projection quality and better chromatic aberration. In some embodiments, the preferred limit is 56≦V1+V3≦94. In addition, when the second lens 2 has a positive refractive power and the fifth lens 5 has a positive refractive power, the assembly yield and imaging quality can be improved.

[0236] In some embodiments, when the materials of the first lens 1 to the sixth lens 6 meet the following configuration relationship, it is beneficial to the transmission and deflection of the imaging light, and effectively improves the chromatic aberration, so that the projection lens matched with the optical lens group 10 has excellent optical quality. For example: V1+V2+V4≦150; V1+V4≦123. The preferred restrictions are: 79≦V1+V2+V4≦150; 38≦V1+V4≦112.

[0237] The optical lens assembly 10 of the present invention can further satisfy the following conditional expressions, which help maintain the effective focal length and each optical parameter at an appropriate value, and avoid any parameter being too large and thus detrimental to the correction of the aberration of the entire optical lens assembly 10, or avoid any parameter being too small and thus affecting assembly or increasing the difficulty of manufacturing. For example: TTL / EFL≦1.600; 3.800≦TTL / BFL; 2.900≦EFL / BFL; 4.700≦(ImgH+T2+G23+T3+T5+G56+T6) / BFL; 4.700≦(EFL+T2+G23+T3+T5+G56+T6 ) / (G34+T4+G45+T5); 2.800≦ImgH*Fno / (G34+T4+G45+T5); 3.900≦ImgH*Fno / BFL; 6.800≦EFL*Fno / (T1+G12); 2.900≦(ImgH+G56) / BFL. The better limits are: 1.200≦TTL / EFL≦1.500; 4.300≦TTL / BFL≦7.800; 3.300≦EFL / BFL≦5.400; 5.200≦(ImgH+T2+G23+T3+T5+G56+T6) / BFL≦8.600; 5.200≦(EFL+T2+G23+T3+T5+G56+T6) / (G34+T4+G45+T5)≦9.800; 3.100≦ImgH*Fno / (G34+T4+G45+T5)≦7.500; 4.300≦ImgH*Fno / BFL≦6.000; 7.500≦EFL*Fno / (T1+G12)≦19.400; 3.200≦(ImgH+G56) / BFL≦5.200.

[0238] In some embodiments, when the optical lens assembly 10 of the present invention can further satisfy the following conditional expressions, it is helpful to maintain the thickness and spacing of each lens at an appropriate value, to avoid any parameter being too large and thus detrimental to the overall thinning of the optical lens assembly 10, or to avoid any parameter being too small and thus affecting assembly or increasing the difficulty of manufacturing. For example: 6.100≦TTL / (T1+G12+G34); 3.600≦TTL / (G34+T4+G45+T5); 1.800≦(T2+G23+T3+G56) / (T4+G45+T5); 2.300≦(T2+G23+T3) / (T1+G12); 2.300≦(T2+G23+T3+T5+G56+T6) / BFL; 6.300≦TTL / (T1+G12); 3.600≦TTL / (G34+T4+G45+T5); 1.800≦(T2+G23+T3+G56) / (T4+G45+T5); 2.300≦(T2+G23+T3) / (T1+G12); 2.300≦(T2+G23+T3+T5+G56+T6) / BFL; ≦(T2+G23+T3+G56)*Fno / (T1+G12+G34); 5.000≦TL / (G12+G34+G45); 3.300≦ALT / (T1+T4); 6.500≦ALT / (G12+G34); 4.800≦(T2+T3+G56) / (G12+G34); 1.800≦(T2+T3+T4+T5+T6) / BFL. The better limits are: 6.8≦TTL / (T1+G12+G34)≦12.400; 4.100≦TTL / (G34+T4+G45+T5)≦7.400; 2.100≦(T2+G23+T3+G56) / (T4+G45+T5)≦4.000; 2.500≦(T2+G23+T3) / (T1+G12)≦4.800; 2.600≦(T2+G23+T3+T5+G56+T6) / BFL≦4.700; 7.000≦(T 2+G23+T3+G56)*Fno / (T1+G12+G34)≦16.000; 5.500≦TL / (G12+G34+G45)≦21.500; 3.700≦ALT / (T1+T4)≦4.700; 7 .300≦ALT / (G12+G34)≦27.600; 5.300≦(T2+T3+G56) / (G12+G34)≦23.000; 2.000≦(T2+T3+T4+T5+T6) / BFL≦3.800.

[0239] In addition, any combination of parameters of the embodiment may be selected to increase the optical lens group restrictions, so as to facilitate the design of the optical lens group of the same structure of the present invention.

[0240] In view of the unpredictability of optical system design, under the framework of the present invention, meeting the above conditions can better shorten the length of the system of the present invention, increase the available aperture, improve the optical quality, or improve the assembly yield, thereby improving the shortcomings of the prior art.

[0241] The exemplary limiting relationships listed above can also be arbitrarily and selectively combined in different quantities and applied to the implementation of the present invention, and are not limited thereto. When implementing the present invention, in addition to the aforementioned relationships, other detailed structures such as the arrangement of concave and convex surfaces of other lenses can also be designed for a single lens or for multiple lenses in a broad sense to enhance the control of system performance and / or resolution. It should be noted that these details need to be selectively combined and applied to other embodiments of the present invention without conflict.

[0242] The numerical ranges obtained by the combination ratio relationship of the optical parameters disclosed in each embodiment of the present invention, including the maximum and minimum values, can be implemented accordingly.

[0243] The contents disclosed in each embodiment of the present invention include but are not limited to optical parameters such as focal length, lens thickness, Vd Abbe number, etc. For example, the present invention discloses an optical parameter A and an optical parameter B in each embodiment, wherein the ranges covered by these optical parameters, the comparison relationship between the optical parameters, and the conditional ranges covered by multiple embodiments are specifically explained as follows:

[0244] The range covered by the optical parameter, for example: α2≦A≦α1 or β2≦B≦β1, α1 is the maximum value of the optical parameter A in multiple embodiments, α2 is the minimum value of the optical parameter A in multiple embodiments, β1 is the maximum value of the optical parameter B in multiple embodiments, and β2 is the minimum value of the optical parameter B in multiple embodiments.

[0245] The comparative relationship between optical parameters, for example: A is greater than B or A is less than B.

[0246] The conditional ranges covered by the multiple embodiments are, specifically, the combination relationship or proportional relationship obtained by possible calculation of multiple optical parameters of the same embodiment, and these relationships are defined as E. E can be, for example: A+B or AB or A / B or A*B or (A*B)1 / 2, and E satisfies the conditional expression E≦γ1 or E≧γ2 or γ2≦E≦γ1, γ1 and γ2 are the values ​​obtained by calculating the optical parameter A and the optical parameter B of the same embodiment, and γ1 is the maximum value among the multiple embodiments of the present invention, and γ2 is the minimum value among the multiple embodiments of the present invention.

[0247] The ranges covered by the above optical parameters, the comparison relationship between the optical parameters, and the maximum and minimum values ​​of the conditional expressions, as well as the numerical ranges within the maximum and minimum values, are all features that can be implemented by the present invention and are within the scope disclosed by the present invention. The above is only an example and should not be limited to this.

[0248] All embodiments of the present invention can be implemented, and some feature combinations can be extracted from the same embodiment. Compared with the prior art, the feature combination can also achieve unexpected effects of the present case. The feature combination includes but is not limited to the combination of features such as face shape, refractive index and conditional formula. The disclosure of the implementation mode of the present invention is a specific embodiment to illustrate the principle of the present invention, and the present invention should not be limited to the disclosed embodiment. In other words, the embodiment and its drawings are only for demonstration of the present invention and are not limited thereto.

Claims

1. An optical lens assembly, suitable for use in a projection lens, and used for generating multiple light beams from multiple lights emitted by a multi-light source generating unit through the optical lens assembly, the direction toward the multi-light source generating unit is a light incident side, and the other side opposite is a light exit side, characterized in that: The optical lens assembly includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in sequence along an optical axis from the light-exiting side to the light-incident side, and the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens each include a light-exiting surface facing the light-exiting side and a light-incident surface facing the light-incident side, wherein: The projection lens satisfies the following condition: EDmax / EDmin≦2.100; The first lens has a negative refractive power; The second lens has a positive refractive power; The fourth lens has a negative refractive power; The fifth lens has a positive refractive power; a circumferential area of ​​the light-emitting surface of the fifth lens is a concave surface; A circumferential area of ​​the light incident surface of the sixth lens is a convex surface; The optical lens group includes only the six lenses mentioned above and satisfies the following condition: V1+V2+V3≦140, wherein EDmax is the maximum effective diameter of the first lens to the sixth lens, EDmin is the minimum effective diameter of the first lens to the sixth lens, V1 is the Vd Abbe number of the first lens, V2 is the Vd Abbe number of the second lens, and V3 is the Vd Abbe number of the third lens.

2. An optical lens assembly, suitable for use in a projection lens, and used for generating multiple light beams from multiple lights emitted by a multi-light source generating unit through the optical lens assembly, the direction toward the multi-light source generating unit is a light incident side, and the other side opposite is a light exit side, characterized in that: The optical lens assembly includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in sequence along an optical axis from the light-exiting side to the light-incident side, and the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens each include a light-exiting surface facing the light-exiting side and a light-incident surface facing the light-incident side, wherein: The projection lens satisfies the following condition: EDmax / EDmin≦2.100; The first lens has a negative refractive power; an optical axis region of the light-emitting surface of the first lens is a convex surface; The second lens has a positive refractive power; The fourth lens has a negative refractive power; The fifth lens has a positive refractive power; a circumferential area of ​​the light-emitting surface of the fifth lens is a concave surface; An optical axis region of the light incident surface of the sixth lens is a concave surface; The optical lens group includes only the six lenses mentioned above and satisfies the following condition: V1+V3≦100, wherein EDmax is the maximum effective diameter of the first lens to the sixth lens, EDmin is the minimum effective diameter of the first lens to the sixth lens, V1 is the Vd Abbe number of the first lens, and V3 is the Vd Abbe number of the third lens.

3. An optical lens assembly, suitable for use in a projection lens, and used for generating multiple light beams from multiple lights emitted by a multi-light source generating unit through the optical lens assembly, the direction toward the multi-light source generating unit is a light incident side, and the other side opposite is a light exit side, characterized in that: The optical lens assembly includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in sequence along an optical axis from the light-exiting side to the light-incident side, and the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens each include a light-exiting surface facing the light-exiting side and a light-incident surface facing the light-incident side, wherein: The projection lens satisfies the following condition: EDmax / EDmin≦2.100; The first lens has a negative refractive power; an optical axis region of the light-emitting surface of the first lens is a convex surface; The second lens has a positive refractive power; a circumferential area of ​​the light-emitting surface of the second lens is a convex surface; The fourth lens has a negative refractive power; The fifth lens has a positive refractive power; An optical axis region of the light incident surface of the sixth lens is a concave surface; a circumferential region of the light incident surface of the sixth lens is a convex surface; The optical lens group includes only the six lenses mentioned above and satisfies the following condition: V1+V3≦100, wherein EDmax is the maximum effective diameter of the first lens to the sixth lens, EDmin is the minimum effective diameter of the first lens to the sixth lens, V1 is the Vd Abbe number of the first lens, and V3 is the Vd Abbe number of the third lens.

4. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens assembly further satisfies the following formula: TTL / EFL≦1.600, wherein TTL is the distance from the light-emitting surface of the first lens to the light-emitting surface of the multi-light source generating unit on the optical axis, and EFL is the effective focal length of the optical lens assembly.

5. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens assembly further satisfies the following formula: 4.700≦(EFL+T2+G23+T3+T5+G56+T6) / (G34+T4+G45+T5), wherein EFL is the effective focal length of the optical lens assembly, T2 is the thickness of the second lens on the optical axis, T3 is the thickness of the third lens on the optical axis, T4 is the thickness of the fourth lens on the optical axis, T5 is the thickness of the fifth lens on the optical axis, T6 is the thickness of the sixth lens on the optical axis, G23 is the air gap between the second lens and the third lens on the optical axis, G34 is the air gap between the third lens and the fourth lens on the optical axis, G45 is the air gap between the fourth lens and the fifth lens on the optical axis, and G56 is the air gap between the fifth lens and the sixth lens on the optical axis.

6. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens assembly further satisfies the following formula: 3.600≦TTL / (G34+T4+G45+T5), wherein TTL is the distance from the light-emitting surface of the first lens to the light-emitting surface of the multi-light source generating unit on the optical axis, G34 is the air gap between the third lens and the fourth lens on the optical axis, G45 is the air gap between the fourth lens and the fifth lens on the optical axis, T4 is the thickness of the fourth lens on the optical axis, and T5 is the thickness of the fifth lens on the optical axis.

7. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens group further satisfies the following formula: 3.900≦ImgH*Fno / BFL, wherein ImgH is the maximum image height of the optical lens group, Fno is the aperture value of the optical lens group, and BFL is the distance from the light incident surface of the sixth lens to a light emitting surface of the multi-light source generating unit on the optical axis.

8. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens assembly further satisfies the following formula: 1.800≦(T2+G23+T3+G56) / (T4+G45+T5), wherein T2 is the thickness of the second lens on the optical axis, T3 is the thickness of the third lens on the optical axis, T4 is the thickness of the fourth lens on the optical axis, T5 is the thickness of the fifth lens on the optical axis, G23 is the air gap between the second lens and the third lens on the optical axis, G45 is the air gap between the fourth lens and the fifth lens on the optical axis, and G56 is the air gap between the fifth lens and the sixth lens on the optical axis.

9. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens assembly further satisfies the following equation: 2.300≦(T2+G23+T3) / (T1+G12), wherein T1 is the thickness of the first lens on the optical axis, T2 is the thickness of the second lens on the optical axis, T3 is the thickness of the third lens on the optical axis, G12 is the air gap between the first lens and the second lens on the optical axis, and G23 is the air gap between the second lens and the third lens on the optical axis.

10. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens assembly further satisfies the following formula: 2.900≦EFL / BFL, wherein EFL is the effective focal length of the optical lens assembly, and BFL is the distance from the light incident surface of the sixth lens to a light emitting surface of the multi-light source generating unit on the optical axis.

11. The optical lens assembly as claimed in claim 1, 2 or 3, wherein the optical lens assembly further satisfies the following equation: 2.300≦(T2+G23+T3+T5+G56+T6) / BFL, characterized in that: T2 is the thickness of the second lens on the optical axis, T3 is the thickness of the third lens on the optical axis, T5 is the thickness of the fifth lens on the optical axis, T6 is the thickness of the sixth lens on the optical axis, G23 is the air gap between the second lens and the third lens on the optical axis, G56 is the air gap between the fifth lens and the sixth lens on the optical axis, and BFL is the distance from the light incident surface of the sixth lens to a light emitting surface of the multi-light source generating unit on the optical axis.

12. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens assembly further satisfies the following formula: 4.700≦(ImgH+T2+G23+T3+T5+G56+T6) / BFL, wherein ImgH is the maximum image height of the optical lens assembly, T2 is the thickness of the second lens on the optical axis, T3 is the thickness of the third lens on the optical axis, T5 is the thickness of the fifth lens on the optical axis, T6 is the thickness of the sixth lens on the optical axis, G23 is the air gap between the second lens and the third lens on the optical axis, G56 is the air gap between the fifth lens and the sixth lens on the optical axis, and BFL is the distance between the light incident surface of the sixth lens and a light emitting surface of the multi-light source generating unit on the optical axis.

13. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens assembly further satisfies the following formula: 6.100≦TTL / (T1+G12+G34), wherein TTL is the distance from the light-emitting surface of the first lens to the light-emitting surface of the multi-light source generating unit on the optical axis, T1 is the thickness of the first lens on the optical axis, G12 is the air gap between the first lens and the second lens on the optical axis, and G34 is the air gap between the third lens and the fourth lens on the optical axis.

14. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens group further satisfies the following formula: 2.800≦ImgH*Fno / (G34+T4+G45+T5), wherein ImgH is the maximum image height of the optical lens group, Fno is the aperture value of the optical lens group, G34 is the air gap between the third lens and the fourth lens on the optical axis, G34 is the air gap between the third lens and the fourth lens on the optical axis, G45 is the air gap between the fourth lens and the fifth lens on the optical axis, T4 is the thickness of the fourth lens on the optical axis, and T5 is the thickness of the fifth lens on the optical axis.

15. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens assembly further satisfies the following formula: 3.800≦TTL / BFL, wherein TTL is the distance from the light emitting surface of the first lens to the light emitting surface of the multi-light source generating unit on the optical axis, and BFL is the distance from the light incident surface of the sixth lens to a light emitting surface of the multi-light source generating unit on the optical axis.

16. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens assembly further satisfies the following formula: 6.800≦EFL*Fno / (T1+G12), wherein EFL is the effective focal length of the optical lens assembly, Fno is the aperture value of the optical lens assembly, T1 is the thickness of the first lens on the optical axis, and G12 is the air gap between the first lens and the second lens on the optical axis.

17. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens group further satisfies the following formula: 2.900≦(ImgH+G56) / BFL, wherein ImgH is the maximum image height of the optical lens group, G56 is the air gap between the fifth lens and the sixth lens on the optical axis, and BFL is the distance between the light incident surface of the sixth lens and a light emitting surface of the multi-light source generating unit on the optical axis.

18. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens assembly further satisfies the following formula: 6.300≦(T2+G23+T3+G56)*Fno / (T1+G12+G34), wherein T1 is the thickness of the first lens on the optical axis, T2 is the thickness of the second lens on the optical axis, T3 is the thickness of the third lens on the optical axis, G12 is the air gap between the first lens and the second lens on the optical axis, G23 is the air gap between the second lens and the third lens on the optical axis, G34 is the air gap between the third lens and the fourth lens on the optical axis, G56 is the air gap between the fifth lens and the sixth lens on the optical axis, and Fno is the aperture value of the optical lens assembly.

19. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens assembly further satisfies the following formula: 5.000≦TL / (G12+G34+G45), wherein TL is a distance from the light exit surface of the first lens to the light entrance surface of the sixth lens on the optical axis, G12 is an air gap between the first lens and the second lens on the optical axis, G34 is an air gap between the third lens and the fourth lens on the optical axis, and G45 is an air gap between the fourth lens and the fifth lens on the optical axis.

20. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens assembly further satisfies the following formula: 3.300≦ALT / (T1+T4), wherein ALT is the sum of thicknesses of the six lenses on the optical axis, T1 is the thickness of the first lens on the optical axis, and T4 is the thickness of the fourth lens on the optical axis.

Images