Optical lens group

Abstract

The invention provides an optical lens group. The optical lens group sequentially comprises first to sixth lenses along an optical axis from a light emergent side to a light incident side. And an optical axis area and a circumferential area of the incident surface of the sixth lens are respectively a concave surface and a convex surface. And a circumferential area of the light-emitting surface of the sixth lens is a concave surface. The optical lens group satisfies the conditional expressions EDmax / EDmin < = 2.100 and 3.000 < = (D21t 32 + G56) / D 11t 21. EDmax and EDmin are the maximum value and the minimum value of the effective diameter. And D21t 32 is the distance from the light emitting surface of the second lens to the light incident surface of the third lens. And G56 is an air gap between the fifth lens and the sixth lens on the optical axis. And D11t 21 is the distance from the light-emitting surface of the first lens to the light-emitting surface of the second lens.

Description

Technical Field

[0001] The invention relates to an optical lens assembly. Background Art

[0002] The specifications of portable electronic devices are changing with each passing day, and their key components - optical lens groups are also becoming more diversified. With the boom of virtual reality (VR) and / or augmented reality (AR), the development of head-mounted wearable devices and peripheral devices has accelerated. Therefore, in addition to being used for video and recording, optical lens groups can also use the principle of optical reflection to project information or images on the lenses of head-mounted wearable devices, and then reflect the information or images into the user's eyes to achieve the effect of augmented reality.

[0003] However, achieving the optimal ratio of light collection and projection imaging while having a thin, light, short, and high-quality optical lens group is a major design challenge for the industry. Summary of the invention

[0004] The present invention provides an optical lens assembly, which helps to improve the projection effect, shorten the system length of the projection lens and / or provide good imaging quality.

[0005] One embodiment of the present invention provides an optical lens group, which is suitable for a projection lens, and multiple lights emitted by a multi-light source generating unit generate multiple light beams through the optical lens group. The direction toward the multi-light source generating unit is a light incident side, and the other side opposite is a light exit side. The optical lens group 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 exit side to the light incident side. The first lens, the second lens, the third lens, the fourth lens, the fifth lens and 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 second lens has a positive refractive power. The fifth lens has a positive refractive power. An optical axis area of ​​the light entrance surface of the sixth lens is a concave surface and a circumferential area of ​​the light entrance surface of the sixth lens is a convex surface. A circumferential area of ​​the light exit surface of the sixth lens is a concave surface. The lenses of the optical lens group only include the first to sixth lenses, and satisfy the following conditional expressions: EDmax / EDmin≦2.100 and 3.000≦(D21t32+G56) / D11t21, wherein EDmax is the maximum effective diameter of the first to sixth lenses, EDmin is the minimum effective diameter of the first to sixth lenses, D21t32 is the distance from the light exit surface of the second lens to the light entrance surface of the third lens, G56 is the air gap between the fifth lens and the sixth lens on the optical axis, and D11t21 is the distance from the light exit surface of the first lens to the light exit surface of the second lens.

[0006] An embodiment of the present invention provides an optical lens group, which is suitable for a projection lens, and multiple lights emitted by a multi-light source generating unit generate multiple light beams through the optical lens group. The direction toward the multi-light source generating unit is a light incident side, and the other side opposite is a light exit side. The optical lens group 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 exit side to the light incident side. The first lens, the second lens, the third lens, the fourth lens, the fifth lens and 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 second lens has a positive refractive power. The fifth lens has a positive refractive power. An optical axis area of ​​the light exit surface of the second lens is a convex surface. An optical axis area of ​​the light entrance surface of the sixth lens is a concave surface. A circumferential area of ​​the light exit surface of the sixth lens is a concave surface. The lenses of the optical lens group only include the first to sixth lenses, and satisfy the following conditional expressions: EDmax / EDmin≦2.100 and 4.100≦(D21t32+G56)*Fno / (D11t21+G34), wherein EDmax is the maximum effective diameter of the first to sixth lenses, EDmin is the minimum effective diameter of the first to sixth lenses, D21t32 is the distance from the light exit surface of the second lens to the light entrance surface of the third lens, G56 is the air gap between the fifth lens and the sixth lens on the optical axis, Fno is the aperture value, D11t21 is the distance from the light exit surface of the first lens to the light exit surface of the second lens, and G34 is the air gap between the third lens and the fourth lens on the optical axis.

[0007] An embodiment of the present invention provides an optical lens group, which is suitable for a projection lens, and multiple lights emitted by a multi-light source generating unit generate multiple light beams through the optical lens group. The direction toward the multi-light source generating unit is a light incident side, and the other side opposite is a light exit side. The optical lens group 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 exit side to the light incident side. The first lens, the second lens, the third lens, the fourth lens, the fifth lens and 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 second lens has a positive refractive power. The fifth lens has a positive refractive power. A circumferential area of ​​the light exit surface of the fifth lens is a concave surface. An optical axis area of ​​the light entrance surface of the sixth lens is a concave surface. A circumferential area of ​​the light exit surface of the sixth lens is a concave surface. The lenses of the optical lens group only include the first to sixth lenses, and satisfy the following conditional expressions: EDmax / EDmin≦2.100 and 4.100≦(D21t32+G56)*Fno / (D11t21+G34), wherein EDmax is the maximum effective diameter of the first to sixth lenses, EDmin is the minimum effective diameter of the first to sixth lenses, D21t32 is the distance from the light exit surface of the second lens to the light entrance surface of the third lens, G56 is the air gap between the fifth lens and the sixth lens on the optical axis, Fno is the aperture value, D11t21 is the distance from the light exit surface of the first lens to the light exit surface of the second lens, and G34 is the air gap between the third lens and the fourth lens on the optical axis.

[0008] Based on the above, the beneficial effect of the optical imaging lens of the embodiment of the present invention is that by satisfying the above-mentioned concave and convex surface arrangement design of the lens, the refractive index conditions and the design satisfying the above-mentioned conditional formula, the optical lens group helps to improve the projection effect, shorten the system length of the projection lens and / or provide good imaging 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.23is 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. 27 is 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 ninth embodiments of the present invention and the numerical values ​​of their relationship are shown in FIG.

[0081] Fig.44 2 shows the important parameters of the optical lens assembly of the first to ninth embodiments of the present invention and the numerical values ​​of their relational expressions;

[0082] Fig.45 Figure 3 shows the important parameters of the optical lens assembly of the first to ninth embodiments of the present invention and the numerical values ​​of their relationship expressions;

[0083] Fig.46 FIG4 shows the numerical values ​​of the important parameters and their relationship expressions of the optical lens assembly of the first to ninth embodiments of the present invention.

[0084] Description of labels:

[0085] 1: first lens; 2: second lens; 3: third lens; 4: fourth lens; 5: fifth lens; 6: sixth lens;

[0086] 7: aperture; 10: optical lens group;

[0087] 11, 21, 31, 41, 51, 61, 110, 410, 510: light emitting surface;

[0088] 12, 22, 32, 42, 52, 62, 120, 320: light incident side;

[0089] 15: multi-light source generating unit; 15a: light source; 20: projection lens;

[0090] 100, 200, 300, 400, 500: lenses; 100a: light emitting surface;

[0091] 111, 121, 211, 221, 311, 321, 411, 421, 511, 521, 611, 621, Z1: optical axis area;

[0092] 113, 123, 213, 223, 313, 323, 413, 423, 513, 523, 613, 623, Z2: circumferential area;

[0093] 130: assembly part; 211, 212: parallel light rays; a, b, c: light beams; A1: light exit side; A2: light entrance side;

[0094] CP: center point; CP1: first center point; CP2: second center point; D1, D2: distance; EL: extension line;

[0095] I: optical axis; Lc: chief ray; LCR: radius of luminous circle; Lm: marginal ray; OB: optical boundary; M, R: points;

[0096] TP1: first transition point / transition point; TP2: second transition point; Z3: relay zone; ω: half field of view angle. DETAILED DESCRIPTION

[0097] Please refer to Figure 1A , the light direction of the projection lens 20 is the display light or the sensing light emitted by the multi-light source generating unit 15, and the optical lens group 10 of the embodiment of the present invention generates a plurality of light beams a, b, c for detecting the environment in front of the projection lens 20, wherein the light beams a, b, 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, and the number of the light beams a, b, c is not limited to 3, and the number can be other numbers not equal to 3 and 1, and Figure 1A The light beams a, b, and 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 circular arrangement 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. The light emitting surfaces of the light sources 15a form the light emitting surface 100a of the multi-light source generating unit 15.

[0098] 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, that is, a parallel imaging light is focused and imaged 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 .

[0099] 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.

[0100] The optical lens group 10 of the present specification includes at least one lens, which receives the imaging light of the incident optical system that is parallel to the optical axis and within the half-viewing angle (HFOV) relative to the optical axis. The imaging light is imaged on the imaging plane through the optical system. The so-called "a lens has a positive refractive power (or 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-emitting surface (or light-incoming surface) of the lens" is defined as the specific range of the imaging light passing through the lens surface. The imaging light includes at least two types of light: the chief ray Lc and the marginal ray Lm (such as Figure 2 The light exiting surface (or light incident surface) of the lens can be divided into different regions according to different positions, including an optical axis region, a circumferential region, or one or more relay regions in some embodiments. The description of these regions will be described in detail below.

[0101] 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 As shown in the 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. A 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 5 as shown) and the Nth conversion point (farthest from the optical axis I).

[0102] 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.

[0103] 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.

[0104] In addition, see Figure 2 The 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. The imaging 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.

[0105] 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 point R on 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 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.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] Figure 7 FIG. 4 is a schematic diagram of an optical lens assembly according to a first embodiment of the present invention. FIG. 8A to FIG. 8D The longitudinal spherical aberration and various aberration diagrams of the optical lens set of the first embodiment. Figure 7The optical lens assembly 10 of the first embodiment of the present invention is suitable for a projection lens. The optical lens assembly 10 includes an aperture 7, 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 in sequence along an optical axis I from a light exiting side A1 to a light entering side A2. When light is emitted from the light emitting surface 100a of the multi-light source generating unit 15 and enters the optical lens assembly 10, a plurality of light beams are generated after passing 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 7 in sequence, and then emitted from the optical lens assembly 10. It is additionally explained that the light entering side A2 is a side facing the multi-light source generating unit 15, and the other side opposite is the light exiting side A1. It is worth mentioning that in the optical lens group 10, the lenses having refractive powers are only the above 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, and 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 can be plastic or glass.

[0114] In this 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 assembly 10 respectively include a light emitting surface 11, 21, 31, 41, 51, 61 facing the light emitting side A1 and a light incident surface 12, 22, 32, 42, 52, 62 facing the light incident side A2.

[0115] The first lens 1 has a positive refractive power. The material of the first lens 1 is plastic (for example, EP-9000_21). The optical axis area 111 of the light emitting surface 11 of the first lens 1 is a convex surface, and the circumferential area 113 of the light emitting surface 11 of the first lens 1 is a convex surface. The optical axis area 121 of the light incident surface 12 of the first lens 1 is a concave surface, and the circumferential area 123 of the light incident surface 12 of the first lens 1 is a concave surface. In the present embodiment, the light emitting surface 11 and the light incident surface 12 of the first lens 1 are both aspheric surfaces, but the present invention is not limited thereto.

[0116] The second lens 2 has a positive refractive power. The material of the second lens 2 is glass (for example, M-TAF101). The optical axis area 211 of the light emitting surface 21 of the second lens 2 is a convex surface, and the circumferential area 213 of the light emitting surface 21 of the second lens 2 is a convex surface. The optical axis area 221 of the light incident surface 22 of the second lens 2 is a concave surface, and the circumferential area 223 of the light incident surface 22 of the second lens 2 is a concave surface. In the present embodiment, the light emitting surface 21 and the light incident surface 22 of the second lens 2 are both aspherical surfaces, but the present invention is not limited thereto.

[0117] The third lens 3 has a positive refractive power. The material of the third lens 3 is plastic (for example, APL5014CL). The optical axis region 311 of the light emitting surface 31 of the third lens 3 is a convex surface, and the circumferential region 313 of the light emitting surface 31 of the third lens 3 is a convex surface. The optical axis region 321 of the light incident surface 32 of the third lens 3 is a convex surface, and the circumferential region 323 of the light incident surface 32 of the third lens 3 is a convex surface. In the present embodiment, the light emitting surface 31 and the light incident surface 32 of the third lens 3 are both aspherical surfaces, but the present invention is not limited thereto.

[0118] The fourth lens 4 has a negative refractive power. The material of the fourth lens 4 is plastic (for example, EP-8000_21). The optical axis region 411 of the light emitting surface 41 of the fourth lens 4 is a concave surface, and the circumferential region 413 of the light emitting surface 41 of the fourth lens 4 is a concave surface. The optical axis region 421 of the light incident surface 42 of the fourth lens 4 is a concave surface, and the circumferential region 423 of the light incident surface 42 of the fourth lens 4 is a convex surface. In the present embodiment, the light emitting surface 41 and the light incident surface 42 of the fourth lens 4 are both aspherical surfaces, but the present invention is not limited thereto.

[0119] The fifth lens 5 has a positive refractive power. The material of the fifth lens 5 is plastic (for example, APL5014CL). The optical axis region 511 of the light-emitting surface 51 of the fifth lens 5 is a convex surface, and the circumferential region 513 of the light-emitting surface 51 of the fifth lens 5 is a concave surface. The optical axis region 521 of the light-entering surface 52 of the fifth lens 5 is a concave surface, and the circumferential region 523 of the light-entering surface 52 of the fifth lens 5 is a convex surface. In the present embodiment, the light-emitting surface 51 and the light-entering surface 52 of the fifth lens 5 are both aspherical surfaces, but the present invention is not limited thereto.

[0120] The sixth lens 6 has a negative refractive power. The sixth lens 6 is made of plastic (e.g., ZEONEX-K26R_17). The optical axis region 611 of the light-emitting surface 61 of the sixth lens 6 is a convex surface, and the circumferential region 613 of the light-emitting surface 61 of the sixth lens 6 is a concave surface. The optical axis region 621 of the light-entering surface 62 of the sixth lens 6 is a concave surface, and the circumferential region 623 of the light-entering surface 62 of the sixth lens 6 is a convex surface. In the present embodiment, the light-emitting surface 61 and the light-entering surface 62 of the sixth lens 6 are both aspherical surfaces, but the present invention is not limited thereto.

[0121] Other detailed optical data of the first embodiment are as follows Fig. 9As shown, the optical lens assembly 10 of the first embodiment has a system focal length (EFL) of 3.209 millimeters (mm), a half field of view (HFOV) of 37.200°, a system length of 4.454 millimeters, an aperture value (F-number, Fno) of 1.550, and an image height of 2.056 millimeters, wherein the system length refers to the distance from the light-emitting 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 an aperture value calculated based on the principle of reversibility of light, with the aperture 7 regarded as the entrance pupil.

[0122] 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 twelve surfaces, are aspheric 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 aspheric surfaces. These aspheric surfaces are defined according to formula (1):

[0123]

[0124] in:

[0125] Y: the distance between the point on the aspheric curve and the optical axis I;

[0126] 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);

[0127] R: radius of curvature of the lens surface;

[0128] K: conic constant;

[0129] a i : i-th order aspheric coefficient.

[0130] The material parameters of the lens disclosed in the optical parameter table of the embodiment are in the format of nd refractive index and Vd Abbe number 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, and Vd is calculated based on the refractive index of the material at the d, F and C wavelengths of the Fraunhofer spectrum.

[0131] The focal length values ​​disclosed in the optical parameter table of the embodiment are 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.

[0132] 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.

[0133] In addition, the relationship between the important parameters of the optical lens assembly 10 of the first embodiment is as follows: Fig.43 , Fig.45 As shown, in Figure 43 to Figure 46 The unit of each parameter is millimeter (mm). In this article, the parameters are defined as follows:

[0134] T1 is the thickness of the first lens 1 on the optical axis I;

[0135] T2 is the thickness of the second lens 2 on the optical axis I;

[0136] T3 is the thickness of the third lens 3 on the optical axis I;

[0137] T4 is the thickness of the fourth lens 4 on the optical axis I;

[0138] T5 is the thickness of the fifth lens 5 on the optical axis I;

[0139] T6 is the thickness of the sixth lens 6 on the optical axis I;

[0140] G12 is the air gap between the first lens 1 and the second lens 2 on the optical axis I;

[0141] G23 is the air gap between the second lens 2 and the third lens 3 on the optical axis I;

[0142] G34 is the air gap between the third lens 3 and the fourth lens 4 on the optical axis I;

[0143] G45 is the air gap between the fourth lens 4 and the fifth lens 5 on the optical axis I;

[0144] G56 is the air gap between the fifth lens 5 and the sixth lens 6 on the optical axis I;

[0145] 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;

[0146] 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;

[0147] D21t32 is the distance from the light exiting surface 21 of the second lens 2 to the light incident surface 32 of the third lens 3, i.e., the sum of T2, G23 and T3;

[0148] D11t21 is the distance from the light exit surface 11 of the first lens 1 to the light exit surface 21 of the second lens 2, that is, the sum of T1 and G12;

[0149] 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;

[0150] TTL is the distance between the light-emitting surface 11 of the first lens 1 and the light-emitting surface 100a on the optical axis I;

[0151] 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;

[0152] 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 assembly 10;

[0153] 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;

[0154] Fno is an aperture value, which is calculated based on the principle of reversibility of light as the effective aperture of the parallel light emitted by the optical lens group 10;

[0155] EFL is the effective focal length of the optical lens assembly 10 .

[0156] In addition, define:

[0157] 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;

[0158] f1 is the focal length of the first lens 1;

[0159] f2 is the focal length of the second lens 2;

[0160] f3 is the focal length of the third lens 3;

[0161] f4 is the focal length of the fourth lens 4;

[0162] f5 is the focal length of the fifth lens 5;

[0163] f6 is the focal length of the sixth lens 6;

[0164] n1 is the nd refractive index of the first lens 1;

[0165] n2 is the nd refractive index of the second lens 2;

[0166] n3 is the nd refractive index of the third lens 3;

[0167] n4 is the nd refractive index of the fourth lens 4;

[0168] n5 is the nd refractive index of the fifth lens 5;

[0169] n6 is the nd refractive index of the sixth lens 6;

[0170] V1 is the Vd Abbe number of the first lens 1;

[0171] V2 is the Vd Abbe number of the second lens 2;

[0172] V3 is the Vd Abbe number of the third lens 3;

[0173] V4 is the Vd Abbe number of the fourth lens 4;

[0174] V5 is the Vd Abbe number of the fifth lens 5; and

[0175] V6 is the Vd Abbe number of the sixth lens 6 .

[0176] Also refer to FIG. 8A to FIG. 8D , Fig. 8A The diagram of the first embodiment illustrates the longitudinal spherical aberration (Longitudinal Spherical Aberration) on the light emitting surface 100a when the pupil radius (PupilRadius) is 1.0350 mm and when the wavelength is 507nm, 525nm and 543nm. 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 light emitting surface 100a of the first embodiment when the wavelength is 507nm, 525nm and 543nm. Fig.8D The diagram of FIG. 1 illustrates the distortion aberration of the first embodiment on the light emitting surface 100a when the wavelength is 507nm, 525nm and 543nm. Fig. 8AIn the longitudinal spherical aberration diagram, 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 ±0.025 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.

[0177] 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 ±0.18 mm, indicating that the optical lens group 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 has met the imaging quality requirements of the optical lens group. Accordingly, compared with the existing optical lens, the first embodiment can still provide good imaging quality under the condition that the system length has been shortened to about 4.454 mm. Therefore, the first embodiment can shorten the length of the optical lens group while maintaining good optical performance.

[0178] Fig.11 It is a schematic diagram of an optical lens assembly according to a second embodiment of the present invention. 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 these lenses (for example, the first lens 1 to the sixth lens 6) are more or less different. In addition, in this embodiment, the circumferential area 423 of the light incident surface 42 of the fourth lens 4 is a concave surface. It should be noted here that in order to clearly show the drawing, Fig.11 Part of the numbers of the optical axis area and the circumferential area having a surface shape similar to that of the first embodiment are omitted.

[0179] The detailed optical data of the optical lens assembly 10 of the second embodiment are as follows: Fig.13 As shown, the optical lens assembly 10 of the second embodiment has a system focal length of 3.172 mm, a half field of view (HFOV) of 37.200°, a system length of 4.445 mm, an aperture value (Fno) of 1.532, and an image height of 2.048 mm.

[0180] Fig.14 The aspheric coefficients of various items in formula (1) from the light exit surface 11 of the first lens 1 to the light entrance surface 62 of the sixth lens 6 in the second embodiment are shown.

[0181] In addition, the relationship between the important parameters of the optical lens assembly 10 of the second embodiment is as follows: Fig.43 , Fig.45 shown.

[0182] 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 ±0.025 mm. Fig. 12B and Fig. 12C In the two field curvature aberration diagrams, the focal length variation for the three representative wavelengths over the entire field of view falls within ±0.16 mm. Fig.12D The distortion diagram shows that the distortion of the second embodiment is maintained within the range of ±16%.

[0183] It can be seen from the above description that the system length of the second embodiment is shorter than that of the first embodiment. The longitudinal spherical aberration and field curvature aberration of the second embodiment are better than those of the first embodiment.

[0184] Fig.15 It is a schematic diagram of an optical lens assembly according to a third embodiment of the present invention. 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 these lenses (for example, the first lens 1 to the sixth lens 6) are more or less different. In addition, in this embodiment, the circumferential area 423 of the light incident surface 42 of the fourth lens 4 is a concave surface. It should be noted here that in order to clearly show the drawing, Fig.15 Part of the numbers of the optical axis area and the circumferential area having a surface shape similar to that of the first embodiment are omitted.

[0185] The detailed optical data of the optical lens assembly 10 of the third embodiment are as follows: Fig.17 As shown, the optical lens assembly 10 of the third embodiment has a system focal length of 3.743 mm, a half field of view (HFOV) of 37.200°, a system length of 4.911 mm, an aperture value (Fno) of 1.808, and an image height of 2.403 mm.

[0186] Fig.18 The aspheric coefficients of various items in formula (1) from the light exit surface 11 of the first lens 1 to the light entrance surface 62 of the sixth lens 6 in the third embodiment are shown.

[0187] In addition, the relationship between the important parameters of the optical lens assembly 10 of the third embodiment is as follows: Fig.43 , Fig.45 shown.

[0188] 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 ±0.025 mm. Fig. 16B and Fig. 16C In the two field curvature aberration diagrams, the focal length variation for the three representative wavelengths over the entire field of view falls within ±0.20 mm. Fig.16D The distortion diagram shows that the distortion of the second embodiment is maintained within the range of ±16%. And the third embodiment also has a larger image height.

[0189] Fig.19 It is a schematic diagram of an optical lens assembly according to a fourth embodiment of the present invention. 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 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 these lenses (for example, the first lens 1 to the sixth lens 6) are more or less different. In addition, in this embodiment, the first lens 1 has a negative refractive power. The fourth lens 4 has a positive refractive power. The optical axis area 411 of the light exit surface 41 of the fourth lens 4 is a convex surface, and the circumferential area 423 of the light incident surface 42 of the fourth lens 4 is a concave surface. It should be noted here that in order to clearly display the drawing, Fig.19 Part of the numbers of the optical axis area and the circumferential area having a surface shape similar to that of the first embodiment are omitted.

[0190] The detailed optical data of the optical lens assembly 10 of the fourth embodiment are as follows: Fig.21 As shown, the optical lens assembly 10 of the fourth embodiment has a system focal length of 3.221 mm, a half field of view (HFOV) of 37.200°, a system length of 4.619 mm, an aperture value (Fno) of 1.556, and an image height of 2.139 mm.

[0191] Fig. 22 The aspheric coefficients of various items in formula (1) from the light exit surface 11 of the first lens 1 to the light entrance surface 62 of the sixth lens 6 in the fourth embodiment are shown.

[0192] In addition, the relationship between the important parameters of the optical lens assembly 10 of the fourth embodiment is as follows: Fig.43 , Fig.45 shown.

[0193] 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 ±0.030 mm. Fig. 20B and Fig. 20CIn the two field curvature aberration diagrams, the focal length variation for the three representative wavelengths over the entire field of view falls within ±0.03 mm. Fig.20D The distortion diagram shows that the distortion of the second embodiment is maintained within the range of ±14%.

[0194] From the above description, it can be known that the field curvature aberration and distortion aberration of the fourth embodiment are better than those of the first embodiment. In addition, the fourth embodiment also has a larger image height.

[0195] Fig.23 It is a schematic diagram of an optical lens assembly according to a fifth embodiment of the present invention. 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 these lenses (for example, the first lens 1 to the sixth lens 6) are more or less different. In addition, in this embodiment, the first lens 1 has a negative refractive power. The fourth lens 4 has a positive refractive power. The optical axis area 411 of the light exit surface 41 of the fourth lens 4 is a convex surface, and the circumferential area 423 of the light incident surface 42 of the fourth lens 4 is a concave surface. It should be noted here that in order to clearly display the drawing, Fig.23 Part of the numbers of the optical axis area and the circumferential area having a surface shape similar to that of the first embodiment are omitted.

[0196] The detailed optical data of the optical lens assembly 10 of the fifth embodiment are as follows: Fig.25 As shown, the optical lens assembly 10 of the fifth embodiment has a system focal length of 3.145 mm, a half field of view (HFOV) of 37.200°, a system length of 4.548 mm, an aperture value (Fno) of 1.519, and an image height of 2.070 mm.

[0197] Fig.26 The aspheric coefficients of various items in formula (1) from the light exit surface 11 of the first lens 1 to the light entrance surface 62 of the sixth lens 6 in the fifth embodiment are shown.

[0198] In addition, the relationship between the important parameters of the optical lens assembly 10 of the fifth embodiment is as follows: Fig.43 , Fig.45 shown.

[0199] 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 for the three representative wavelengths over the entire field of view falls within ±0.05 mm. Fig.24DThe distortion diagram shows that the distortion of the second embodiment is maintained within the range of ±14%.

[0200] From the above description, it can be known that the longitudinal spherical aberration, field curvature aberration and distortion aberration of the fifth embodiment are better than those of the first embodiment. In addition, the fifth embodiment also has a larger image height.

[0201] Fig. 27 It is a schematic diagram of an optical lens assembly according to a sixth embodiment of the present invention. 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 generally similar to the first embodiment, and the differences between the two are as follows: the optical data, aspheric coefficients and parameters between these lenses (for example, the first lens 1 to the sixth lens 6) are more or less different. In addition, in this embodiment, the first lens 1 has a negative refractive power. The circumferential area 223 of the light incident surface 22 of the second lens 2 is a convex surface. The fourth lens 4 has a positive refractive power. The optical axis area 411 of the light exit surface 41 of the fourth lens 4 is a convex surface, and the circumferential area 423 of the light incident surface 42 of the fourth lens 4 is a concave surface. It should be noted here that in order to clearly display the drawings, Fig. 27 Part of the numbers of the optical axis area and the circumferential area having a surface shape similar to that of the first embodiment are omitted.

[0202] The detailed optical data of the optical lens assembly 10 of the sixth embodiment are as follows: Fig.29 As shown, the optical lens assembly 10 of the sixth embodiment has a system focal length of 3.224 mm, a half field angle (HFOV) of 37.200°, a system length of 4.616 mm, an aperture value (Fno) of 1.558, and an image height of 2.104 mm.

[0203] Fig.30 The aspheric coefficients of various terms in formula (1) from the light exit surface 11 of the first lens 1 to the light entrance surface 62 of the sixth lens 6 in the sixth embodiment are shown.

[0204] In addition, the relationship between the important parameters of the optical lens assembly 10 of the sixth embodiment is as follows: Fig.44 , Fig.46 shown.

[0205] The longitudinal spherical aberration of the sixth embodiment is as follows: Fig.28A As shown in the figure, the imaging point deviation of off-axis light at different heights is controlled within the range of ±0.009 mm. Fig.28B and Fig.28C In the two field curvature aberration diagrams, the focal length variation for the three representative wavelengths over the entire field of view falls within ±0.05 mm. Fig.28D The distortion diagram shows that the distortion of the second embodiment is maintained within the range of ±14%.

[0206] From the above description, it can be known that the longitudinal spherical aberration, field curvature aberration and distortion aberration of the sixth embodiment are better than those of the first embodiment. In addition, the sixth embodiment also has a larger image height.

[0207] Fig.31 FIG. 4 is a schematic diagram of an optical lens assembly according to a seventh embodiment of the present invention. 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 generally similar to the first embodiment, and the differences between the two are as follows: the optical data, aspheric coefficients and parameters between these lenses (for example, the first lens 1 to the sixth lens 6) are more or less different. In addition, in this embodiment, the first lens 1 has a negative refractive power. The circumferential area 223 of the light incident surface 22 of the second lens 2 is a convex surface. The fourth lens 4 has a positive refractive power. The optical axis area 411 of the light exit surface 41 of the fourth lens 4 is a convex surface, and the circumferential area 423 of the light incident surface 42 of the fourth lens 4 is a concave surface. It should be noted here that in order to clearly display the drawings, Fig.31 Part of the numbers of the optical axis area and the circumferential area having a surface shape similar to that of the first embodiment are omitted.

[0208] The detailed optical data of the optical lens assembly 10 of the seventh embodiment are as follows: Fig.33 As shown, the optical lens assembly 10 of the seventh embodiment has a system focal length of 3.372 mm, a half field of view (HFOV) of 37.200°, a system length of 4.720 mm, an aperture value (Fno) of 1.629, and an image height of 2.190 mm.

[0209] Fig.34 The aspheric coefficients of various items in formula (1) from the light exit surface 11 of the first lens 1 to the light entrance surface 62 of the sixth lens 6 in the seventh embodiment are shown.

[0210] In addition, the relationship between the important parameters of the optical lens assembly 10 of the seventh embodiment is as follows: Fig.44 , Fig.46 shown.

[0211] 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 for the three representative wavelengths over the entire field of view falls within ±0.06 mm. Fig.32D The distortion diagram shows that the distortion of the second embodiment is maintained within the range of ±14%.

[0212] From the above description, it can be known that the longitudinal spherical aberration, field curvature aberration and distortion aberration of the seventh embodiment are better than those of the first embodiment. In addition, the seventh embodiment also has a larger image height.

[0213] Fig.35 It is a schematic diagram of an optical lens assembly according to an eighth embodiment of the present invention. 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 generally similar to the first embodiment, and the differences between the two are as follows: the optical data, aspheric coefficients and parameters between these lenses (for example, the first lens 1 to the sixth lens 6) are more or less different. In addition, in this embodiment, the first lens 1 has a negative refractive power. The circumferential area 223 of the light incident surface 22 of the second lens 2 is a convex surface. The circumferential area 323 of the light incident surface 32 of the third lens 3 is a concave surface. The circumferential area 413 of the light exit surface 41 of the fourth lens 4 is a convex surface, the optical axis area 421 of the light incident surface 42 of the fourth lens 4 is a convex surface, and the circumferential area 423 of the light incident surface 42 of the fourth lens 4 is a concave surface. The sixth lens 6 has a positive refractive power. It should be noted here that in order to clearly display the drawings, Fig.35 Part of the numbers of the optical axis area and the circumferential area having a surface shape similar to that of the first embodiment are omitted.

[0214] The detailed optical data of the optical lens assembly 10 of the eighth embodiment are as follows: Fig.37 As shown, the optical lens assembly 10 of the eighth embodiment has a system focal length of 3.011 mm, a half field of view (HFOV) of 37.200°, a system length of 4.333 mm, an aperture value (Fno) of 1.454, and an image height of 2.283 mm.

[0215] Fig.38 The aspheric coefficients of various terms in formula (1) from the light exit surface 11 of the first lens 1 to the light entrance surface 62 of the sixth lens 6 in the eighth embodiment are shown.

[0216] In addition, the relationship between the important parameters of the optical lens assembly 10 of the eighth embodiment is as follows: Fig.44 , Fig.46 shown.

[0217] 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 ±0.012 mm. Fig.36B and Fig.36C In the two field curvature aberration diagrams, the focal length variation for the three representative wavelengths over the entire field of view falls within ±0.12 mm. Fig.36D The distortion aberration diagram shows that the distortion aberration of the second embodiment is maintained within the range of ±5%.

[0218] From the above description, it can be known that the system length of the eighth embodiment is shorter than that of the first embodiment. The longitudinal spherical aberration, field curvature aberration and distortion aberration of the eighth embodiment are better than those of the first embodiment. And the eighth embodiment also has a larger image height.

[0219] Fig.39 It is a schematic diagram of an optical lens assembly according to a ninth embodiment of the present invention. 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 these lenses (for example, the first lens 1 to the sixth lens 6) are more or less different. In addition, in this embodiment, the first lens 1 has a negative refractive power. The circumferential area 113 of the light-emitting surface 11 of the first lens 1 is a concave surface. The optical axis area 221 of the light-entering surface 22 of the second lens 2 is a convex surface, and the circumferential area 223 of the light-entering surface 22 of the second lens 2 is a convex surface. The third lens 3 has a negative refractive power. The optical axis area 311 of the light-emitting surface 31 of the third lens 3 is a concave surface, and the optical axis area 321 of the light-entering surface 32 of the third lens 3 is a concave surface. The optical axis area 411 of the light-emitting surface 41 of the fourth lens 4 is a convex surface, and the circumferential area 423 of the light-entering surface 42 of the fourth lens 4 is a concave surface. It should be noted here that in order to clearly display the drawings, Fig.39 Part of the numbers of the optical axis area and the circumferential area having a surface shape similar to that of the first embodiment are omitted.

[0220] The detailed optical data of the optical lens assembly 10 of the ninth embodiment are as follows: Fig.41 As shown, the optical lens assembly 10 of the ninth embodiment has a system focal length of 3.131 mm, a half field of view (HFOV) of 37.200°, a system length of 4.518 mm, an aperture value (Fno) of 1.513, and an image height of 2.119 mm.

[0221] Fig.42 The aspheric coefficients of various items in formula (1) from the light exit surface 11 of the first lens 1 to the light entrance surface 62 of the sixth lens 6 in the ninth embodiment are shown.

[0222] In addition, the relationship between the important parameters of the optical lens assembly 10 of the ninth embodiment is as follows: Fig.44 , Fig.46 shown.

[0223] 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 ±0.014 mm. Fig.40B and Fig.40CIn the two field curvature aberration diagrams, the focal length variation for the three representative wavelengths over the entire field of view falls within ±0.10 mm. Fig.40D The distortion diagram shows that the distortion of the second embodiment is maintained within the range of ±12%.

[0224] From the above description, it can be known that the longitudinal spherical aberration, field curvature aberration and distortion aberration of the ninth embodiment are better than those of the first embodiment. In addition, the ninth embodiment also has a larger image height.

[0225] In summary, the optical lens assembly 10 of the embodiment of the present invention can at least achieve the following effects and advantages:

[0226] 1. The optical lens assembly 10 satisfies EDmax / EDmin≦2.100, which helps to effectively collect the main light and the marginal light from the light incident side A2, so that the main light and the marginal light can be projected to the light exit side A1 at a high ratio, thereby improving the projection effect. EDmax is the maximum value of the effective diameters of the first lens 1 to the sixth lens 6, and EDmin is the minimum value of the effective diameters of the first lens 1 to the sixth lens 6. The effective diameter of a lens generally refers to the two optical boundaries OB of the lens on opposite sides of the optical axis I (for example, refer to Figures 3 to 6 ) in the radial direction. In the first to ninth embodiments, EDmin is, for example, twice the distance D1, and EDmax is, for example, twice the distance D2. When the fifth lens 5 has a positive refractive power, an optical axis region 621 of the light incident surface 62 of the sixth lens 6 is a concave surface, a circumferential region 623 of the light incident surface 62 of the sixth lens 6 is a convex surface, and a circumferential region 611 of the light exit surface 61 of the sixth lens 6 is a concave surface, it is possible to converge (or gather) light rays of different angles, correct the aberration of the central field of view of the imaging plane, and, in addition to the surface shape of the specific lens circumferential region, satisfy the conditional expression of 3.000≦(D21t32+G56) / D11t21, it is beneficial to provide an optical lens assembly 10 with a smaller system length and better quality for a projection lens, and the preferred limit is 3.000≦(D21t32+G56) / D11t21≦5.700.

[0227] 2. Based on 1, when the second lens element 2 has a positive refractive power, the assembly yield and imaging quality can be improved.

[0228] 3. The optical lens assembly 10 satisfies EDmax / EDmin≦2.100, which helps to effectively collect the main light and the edge light from the light incident side A2, so that the main light and the edge light can be projected to the light exiting side A1 with a high proportion, thereby improving the projection effect. When the fifth lens 5 has a positive refractive power, an optical axis region 211 of the light exit surface 21 of the second lens 2 is convex, an optical axis region 621 of the light entrance surface 62 of the sixth lens 6 is concave, and a circumferential region 611 of the light exit surface 61 of the sixth lens 6 is concave, it can converge (or gather) light rays of different angles, correct the aberration of the central field of view of the imaging plane, and, in addition to the surface shape of the specific lens circumferential region, satisfy the conditional expression of 4.100≦(D21t32+G56)*Fno / (D11t21+G34), which is conducive to providing an optical lens assembly 10 with a smaller system length and better quality for the projection lens, and the preferred limit is 4.100≦(D21t32+G56)*Fno / (D11t21+G34)≦8.000.

[0229] 4. Based on 3, when the second lens element 2 has a positive refractive power, the assembly yield and imaging quality can be improved.

[0230] 5. The optical lens assembly 10 satisfies EDmax / EDmin≦2.100, which helps to effectively collect the main light and the marginal light from the light incident side A2, so that the main light and the marginal light can be projected to the light exiting side A1 with a high proportion, thereby improving the projection effect. When the fifth lens 5 has a positive refractive power, a circumferential area 511 of the light exit surface 51 of the fifth lens 5 is a concave surface, an optical axis area 621 of the light entrance surface 62 of the sixth lens 6 is a concave surface, and a circumferential area 613 of the light exit surface 61 of the sixth lens 6 is a concave surface, it is possible to converge (or gather) light rays of different angles, correct the aberration of the field of view at the center of the imaging plane, and, in addition to the surface shape of the specific lens circumferential area, satisfy the conditional expression of 4.100≦(D21t32+G56)*Fno / (D11t21+G34), which is conducive to providing an optical lens assembly 10 with a smaller system length and better quality for the projection lens, and the preferred limit is 4.100≦(D21t32+G56)*Fno / (D11t21+G34)≦8.000.

[0231] 6. Based on 5, when the second lens element 2 has a positive refractive power, the assembly yield and imaging quality can be improved.

[0232] 7. When the lens material meets the following configuration relationship, it is beneficial to the transmission and deflection of imaging light, and at the same time effectively improves chromatic aberration, so that the optical lens assembly 10 has excellent optical quality.

[0233]

[0234] 8. The optical lens assembly 10 of the present invention further satisfies the following conditional expressions, which helps to maintain the effective focal length and each optical parameter at an appropriate value, and avoids any parameter being too large and thus detrimental to the correction of the aberration of the entire optical lens assembly 10, or avoids any parameter being too small and thus affecting assembly or increasing the difficulty of manufacturing.

[0235]

[0236] 9. The optical lens assembly 10 of the present invention further satisfies the following conditional formula, which helps to maintain the thickness and spacing of each lens at an appropriate value, avoiding any parameter being too large and thus detrimental to the overall thinning of the optical lens assembly 10, or avoiding any parameter being too small and thus affecting assembly or increasing the difficulty of manufacturing.

[0237]

[0238] In addition, any combination of parameters of the embodiment may be selected to increase the optical lens set restrictions, so as to facilitate the design of the optical lens set of the same structure of the present invention.

[0239] 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.

[0240] 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.

[0241] 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.

[0242] 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:

[0243] (1) 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.

[0244] (2) The comparative relationship between optical parameters, for example: A is greater than B or A is less than B.

[0245] (3) The conditional range covered by multiple embodiments, specifically, the combination relationship or proportional relationship obtained by possible calculation of multiple optical parameters of the same embodiment, 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 parameters A and B of the same embodiment, and γ1 is the maximum value among multiple embodiments of the present invention, and γ2 is the minimum value among multiple embodiments of the present invention.

[0246] 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.

[0247] 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 a projection lens, wherein a plurality of lights emitted by a multi-light source generating unit are passed through the optical lens assembly to generate a plurality of light beams, the direction toward the multi-light source generating unit being a light incident side, and the other side opposite thereto being a light exiting 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-emitting side to the light-entering 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-emitting surface facing the light-emitting side and a light-entering surface facing the light-entering side; wherein, The second lens has a positive refractive power, The fifth lens has positive refractive power, An optical axis region of the light incident surface of the sixth lens is a concave surface and a circumferential region of the light incident surface of the sixth lens is a convex surface, A circumferential area of ​​the light-emitting surface of the sixth lens is a concave surface, and The lenses of the optical lens group only include the first lens to the sixth lens, and satisfy the following conditional expressions: EDmax / EDmin≦2.100 and 3.000≦(D21t32+G56) / D11t21, wherein EDmax is the maximum value of the effective diameters of the first lens to the sixth lens, EDmin is the minimum value of the effective diameters of the first lens to the sixth lens, D21t32 is the distance from the light exit surface of the second lens to the light entrance surface of the third lens, G56 is the air gap between the fifth lens and the sixth lens on the optical axis, and D11t21 is the distance from the light exit surface of the first lens to the light exit surface of the second lens.

2. An optical lens assembly, suitable for a projection lens, wherein a plurality of lights emitted by a multi-light source generating unit are passed through the optical lens assembly to generate a plurality of light beams, the direction toward the multi-light source generating unit being a light incident side, and the other side opposite thereto being a light exiting 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-emitting side to the light-entering 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-emitting surface facing the light-emitting side and a light-entering surface facing the light-entering side; wherein, The second lens has a positive refractive power, The fifth lens has positive refractive power, An optical axis region of the light emitting surface of the second lens is a convex surface; An optical axis region of the light incident surface of the sixth lens is a concave surface, A circumferential area of ​​the light-emitting surface of the sixth lens is a concave surface, and The lenses of the optical lens group only include the first lens to the sixth lens, and satisfy the following conditional formulas: EDmax / EDmin≦2.100 and 4.100≦(D21t32+G56)*Fno / (D11t21+G34), wherein EDmax is the maximum value of the effective diameters of the first lens to the sixth lens, EDmin is the minimum value of the effective diameters of the first lens to the sixth lens, D21t32 is the distance from the light exit surface of the second lens to the light entrance surface of the third lens, G56 is the air gap between the fifth lens and the sixth lens on the optical axis, Fno is the aperture value, D11t21 is the distance from the light exit surface of the first lens to the light exit surface of the second lens, and G34 is the air gap between the third lens and the fourth lens on the optical axis.

3. An optical lens assembly, suitable for a projection lens, wherein a plurality of lights emitted by a multi-light source generating unit are passed through the optical lens assembly to generate a plurality of light beams, the direction toward the multi-light source generating unit being a light incident side, and the other side opposite thereto being a light exiting 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-emitting side to the light-entering 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-emitting surface facing the light-emitting side and a light-entering surface facing the light-entering side; wherein, The second lens has a positive refractive power, The fifth lens has 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, A circumferential area of ​​the light-emitting surface of the sixth lens is a concave surface, and The lenses of the optical lens group only include the first lens to the sixth lens, and satisfy the following conditional formulas: EDmax / EDmin≦2.100 and 4.100≦(D21t32+G56)*Fno / (D11t21+G34), wherein EDmax is the maximum value of the effective diameters of the first lens to the sixth lens, EDmin is the minimum value of the effective diameters of the first lens to the sixth lens, D21t32 is the distance from the light exit surface of the second lens to the light entrance surface of the third lens, G56 is the air gap between the fifth lens and the sixth lens on the optical axis, Fno is the aperture value, D11t21 is the distance from the light exit surface of the first lens to the light exit surface of the second lens, and G34 is the air gap between the third lens and the fourth lens on the optical axis.

4. The optical lens assembly according to claim 2 or 3, characterized in that: The optical lens assembly also satisfies the following conditional formula: 12.500≦TTL / (G12+G34), wherein TTL is the distance from the light-emitting surface of the first lens to a light-emitting surface of the multi-light source generating unit on the optical axis, and G12 is the air gap between the first lens and the second lens on the optical axis.

5. The optical lens assembly according to claim 2 or 3, characterized in that: The optical lens group also satisfies the following conditional formula: 9.200≦(EFL+T2+T3+T5+G56+T6) / (G34+G45), wherein EFL is the effective focal length of the optical lens group, 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, and G45 is the air gap between the fourth lens and the fifth lens on the optical axis.

6. The optical lens assembly according to claim 2 or 3, characterized in that: The optical lens assembly also satisfies the following conditional formula: 13.800≦ALT / G34, wherein ALT is the sum of six thicknesses of the first lens to the sixth lens on the optical axis.

7. The optical lens assembly according to claim 2 or 3, characterized in that: The optical lens assembly also satisfies the following conditional formula: 6.500≦TL / (G34+G45), wherein TL is the distance from the light-emitting surface of the first lens to the light-entering surface of the sixth lens on the optical axis, and G45 is the air gap between the fourth lens and the fifth lens on the optical axis.

8. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens assembly also satisfies the following conditional formula: 3.700≦(V2+V3) / V4, wherein V2 is the Vd Abbe number of the second lens, V3 is the Vd Abbe number of the third lens, and V4 is the Vd Abbe number of the fourth lens.

9. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens assembly also satisfies the following conditional formula: 2.900≦(V2+V3+V5) / (V1+V4), wherein V1 is the Vd Abbe number of the first lens, V2 is the Vd Abbe number of the second lens, V3 is the Vd Abbe number of the third lens, V4 is the Vd Abbe number of the fourth lens, and V5 is the Vd Abbe number of the fifth lens.

10. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens assembly also satisfies the following conditional formula: 4.000≦TTL / BFL, wherein TTL is the distance from the light emitting surface of the first lens to a 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 the light emitting surface on the optical axis.

11. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens assembly also satisfies the following conditional formula: 1.600≦(T2+T3+T4+T5) / BFL, 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, 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 also satisfies the following conditional expression: 3.000≦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.

13. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens assembly also satisfies the following conditional expression: 2.400≦(V2+V4) / V1, wherein V1 is the Vd Abbe number of the first lens, V2 is the Vd Abbe number of the second lens, and V4 is the Vd Abbe number of the fourth lens.

14. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens assembly also satisfies the following conditional formula: 36.900≦V2*V3 / V1, wherein 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.

15. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens assembly also satisfies the following conditional formula: 43.900 degrees ≦ HFOV*TTL / EFL, wherein HFOV is the half viewing angle of the optical lens assembly, TTL is the distance from the light-emitting surface of the first lens to a 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.

16. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens assembly also satisfies the following conditional formula: 5.100≦ALT / T1, wherein ALT is the sum of six thicknesses of the first lens to the sixth lens on the optical axis, and T1 is the thickness of the first lens on the optical axis.

17. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens assembly also satisfies the following conditional formula: 5.700≦(T2+T3+G56) / G12, 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, and G12 is the air gap between the first lens and the second lens on the optical axis.

18. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens assembly also satisfies the following conditional formula: 6.100≦TTL / (G45+T5), wherein TTL is the distance from the light-emitting surface of the first lens to a light-emitting surface of the multi-light source generating unit on the optical axis, G45 is the air gap between the fourth lens and the fifth lens on the optical axis, and T5 is the thickness of the fifth lens on the optical axis.

19. The optical lens assembly according to claim 1, 2 or 3, characterized in that: The optical lens assembly also satisfies the following conditional formula: 2.300≦(T2+T3+G56) / (T4+G45), 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, and G45 is the 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 also satisfies the following conditional formula: 3.600≦(T2+T3) / G12, 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, and G12 is the air gap between the first lens and the second lens on the optical axis.

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