Optical lens group and electronic device

Abstract

The invention provides an optical lens group, which sequentially comprises an optical group comprising a partial reflection and partial transmission element, and an absorption type polarization element, a reflection type polarization element, a phase delay element, a first lens and a second lens which are sequentially arranged from the eye side to the image source side; and a third lens; wherein the partial reflection and partial transmission element is arranged between the first lens and the third lens; at least one of the first lens and the second lens has positive refractive power; when the optical lens group is zoomed from a near point to a far point, the optical lens group moves from an image source side to an eye side. When specific conditions are satisfied, weight can be reduced and imaging quality can be ensured.

Description

Technical Field

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

[0002] With the development of the semiconductor industry, the functions of various consumer electronic products are becoming increasingly powerful, and the emergence of various services on the software application side has given consumers more choices. When the market is no longer satisfied with handheld electronic products, virtual reality (VR) technology, augmented reality (AR) technology, and mixed reality (MR) technology came into being. Today, the application of virtual reality has opened up a new blue ocean for the market of consumer electronic products, and in the application scenarios of virtual reality, the first project to be commercialized is head-mounted display. However, the current head-mounted display has the problems of heavy weight and poor imaging quality.

[0003] In addition, most existing head-mounted displays are fixed-focus designs, so users with myopia or hyperopia need to wear their own glasses in addition, which will affect the wearing comfort and the performance of the head-mounted display. Summary of the invention

[0004] Therefore, the object of the present invention is to provide an optical lens assembly and an electronic device, which can reduce the weight of the device by folding the optical path, provide a zoom function, allow the user to use the device of the present invention without wearing additional glasses, and ensure the image quality.

[0005] According to an embodiment of the present invention, an optical lens assembly is provided, which comprises, in order from the eye side to the image source side: an optical group, comprising a partially reflective and partially transmissive element, and in order from the eye side to the image source side, an absorbing polarizing element (i.e., a first absorbing polarizing element), a reflecting polarizing element, a phase delay element (i.e., a first phase delay element), a first lens with refractive power, and a second lens with refractive power; and a third lens with refractive power; wherein the partially reflective and partially transmissive element is disposed between the first lens and the third lens; at least one of the first lens and the second lens has positive refractive power; when the optical lens assembly is zoomed from the near point to the far point, the optical group moves from the image source side toward the eye side.

[0006] In the optical lens group, the overall focal length of the optical lens group at the near point is f_N, the overall focal length of the optical lens group at the far point is f_F, the composite focal length of the first lens and the second lens is f12, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the curvature radius of the image source side surface of the first lens is R2, the curvature radius of the eye side surface of the second lens is R3, the curvature radius of the image source side surface of the second lens is R4, and the eye side surface of the third lens is The curvature radius of the surface is R5, the curvature radius of the image source side surface of the third lens is R6, the thickness of the first lens on the optical axis is CT1, the thickness of the second lens on the optical axis is CT2, the thickness of the third lens on the optical axis is CT3, the distance on the optical axis from the image source side surface of the second lens of the optical group to the eye side surface of the third lens when the optical lens group is at a far point is T23_F, and the distance on the optical axis from the image source side surface of the second lens of the optical group to the eye side surface of the third lens when the optical lens group is at a near point is T23_F. The distance on the optical axis is T23_N, the maximum effective radius of the image source side surface of the first lens is CA2, the maximum effective radius of the eye side surface of the second lens is CA3, the maximum effective radius of the eye side surface of the third lens is CA5, the maximum effective radius of the image source side surface of the third lens is CA6, the absolute value of the displacement from the intersection of the image source side surface of the first lens on the optical axis to the maximum effective radius position of the image source side surface of the first lens parallel to the optical axis is TDP2, the absolute value of the displacement from the intersection of the eye side surface of the second lens on the optical axis to the maximum effective radius position of the eye side surface of the second lens parallel to the optical axis is TDP3, the absolute value of the displacement from the intersection of the eye side surface of the third lens on the optical axis to the maximum effective radius position of the eye side surface of the third lens parallel to the optical axis is TDP5, the absolute value of the displacement from the intersection of the image source side surface of the third lens on the optical axis to the maximum effective radius position of the image source side surface of the third lens parallel to the optical axis is TDP6, and at least one of the following conditions is satisfied:

[0007] 0.72 <f_N / f_F<1.22;

[0008] -11.34 <R6 / R5<1.61;

[0009] -0.83 <R6 / R2<2.46;

[0010] 4.83 <CA2 / TDP2<80.97;

[0011] -171.97 mm < (R3*R5) / f2 < 144.98 mm;

[0012] -10.65 <f2 / f3<7.35;

[0013] 4.06 < CA3 / TDP3 < 49.78;

[0014] -3.25 < fl / f2 < 3.77;

[0015] -54.72 < R2 / CT1 < 103.11;

[0016] 2.40 < CA5 / TDP5 < 42.28;

[0017] -39.56 < R3 / CT2 < 65.50;

[0018] 0.18 < CT1 / CT2 < 3.69;

[0019] 0.51 < (CT1 + CT2) / CT3 < 4.5l;

[0020] -13.11 < (T23_F - T23_N) / (f_F - f_N) < 4.28;

[0021] -120.01 < f12 / f3 < 4.43;

[0022] -2.40 mm < (f_N * f_F) / f12 < 14.49 mm;

[0023] -9.39 < R3 / R4 < 3.15; and

[0024] 2.23 < CA6 / TDP6 < 2007.81.

[0025] When 0.72 < f_N / f_F < 1.22 is satisfied, within this zoom range, the optical lens group can meet the needs of most myopic human eyes.

[0026] When -11.34 < R6 / R5 < 1.61 is satisfied, the two curvature radii restrict each other to prevent the curvature radius from being too small and reduce the sensitivity to assembly tolerances.

[0027] When -0.83 < R6 / R2 < 2.46 is satisfied, the two curvature radii restrict each other to prevent the curvature radius from being too small and reduce the sensitivity to assembly tolerances.

[0028] When 4.83 < CA2 / TDP2 < 80.97 is satisfied, it helps to achieve an appropriate balance between the lens formability and imaging quality of the first lens.

[0029] When -171.97 mm < (R3 * R5) / f2 < 144.98 mm is satisfied, the refractive power distribution of the second lens is more appropriate, and chromatic aberration can be reduced.

[0030] When -10.65 < f2 / f3 < 7.35 is satisfied, the refractive power distribution of the optical lens group is more appropriate, and the aberration can be reduced.

[0031] When 4.06 < CA3 / TDP3 < 49.78 is satisfied, it helps to achieve an appropriate balance between the lens formability and imaging quality of the second lens.

[0032] When -3.25 < fl / f2 < 3.77 is satisfied, the refractive power distribution of the optical lens group is more appropriate, and the aberration can be reduced.

[0033] When -54.72 < R2 / CTl < 103.11 is satisfied, it helps to improve the distortion of the optical lens group, and while reducing the aberration of the optical lens group, the lens size can be further reduced.

[0034] When 2.40 < CA5 / TDP5 < 42.28 is satisfied, it helps to achieve an appropriate balance between the lens formability and imaging quality of the third lens.

[0035] When -39.56 < R3 / CT2 < 65.50 is satisfied, it helps to achieve an appropriate balance between the curvature radius and thickness of the second lens.

[0036] When 0.18 < CT1 / CT2 < 3.69 is satisfied, it helps with the thickness matching of the first lens and the second lens, and the assembly stability can be ensured.

[0037] When 0.5l < (CT1 + CT2) / CT3 < 4.5l is satisfied, on the premise of meeting the imaging quality, the thickness of the optical lens group can be ensured to meet the processing requirements of the manufacturing process.

[0038] When -13.11 < (T23_F - T23_N) / (f_F - f_N) < 4.28 is satisfied, it ensures that within the zoom range, the balance between the performance of the optical lens group and the miniaturization of the optical lens group can reach the best.

[0039] When -120.01 < f12 / f3 < 4.43 is satisfied, the refractive power distribution of the optical lens group is more appropriate, and the aberration can be reduced.

[0040] When -2.40 mm < (f_N * f_F) / f12 < 14.49 mm is satisfied, the amount of optical distortion difference from the near point to the far point can be reduced.

[0041] When -9.39 < R3 / R4 < 3.15 is satisfied, the two curvature radii restrict each other, preventing the curvature radius from being too small and reducing the sensitivity of the assembly tolerance.

[0042] When 2.23 < CA6 / TDP6 < 2007.81 is satisfied, it helps to achieve an appropriate balance between the lens formability and imaging quality of the third lens.

[0043] In addition, according to an embodiment of the present invention, an electronic device is provided, including: a housing; the above-mentioned optical lens group disposed in the housing; an image source disposed in the housing and configured on the image source plane of the optical lens group; and a controller disposed in the housing and electrically connected to the image source. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] After studying the detailed description in conjunction with the following drawings, other aspects and advantages of the present invention will be found:

[0045] Figure 1A It is a schematic diagram of the optical lens group of the first embodiment of the present invention at the far point.

[0046] Figure 1B It is a schematic diagram of the optical lens group of the first embodiment of the present invention at the near point.

[0047] Figure 1C It is a schematic diagram of the parameters and optical path of the optical lens group of the first embodiment of the present invention.

[0048] Figure 2A It is a schematic diagram of the optical lens group of the second embodiment of the present invention at the far point.

[0049] Figure 2B It is a schematic diagram of the optical lens group of the second embodiment of the present invention at the near point.

[0050] Figure 3A It is a schematic diagram of the optical lens group of the third embodiment of the present invention at the far point.

[0051] Figure 3B It is a schematic diagram of the optical lens group of the third embodiment of the present invention at the near point.

[0052] Figure 4A It is a schematic diagram of the optical lens group of the fourth embodiment of the present invention at the far point.

[0053] Figure 4B It is a schematic diagram of the optical lens group of the fourth embodiment of the present invention at the near point.

[0054] Figure 5A It is a schematic diagram of the optical lens group of the fifth embodiment of the present invention at the far point.

[0055] Figure 5B It is a schematic diagram of the optical lens group of the fifth embodiment of the present invention at the near point.

[0056] Fig. 6AFIG. 4 is a schematic diagram of an optical lens assembly according to a sixth embodiment of the present invention at a far point.

[0057] Figure 6B FIG. 4 is a schematic diagram of an optical lens assembly according to a sixth embodiment of the present invention at a near point.

[0058] Fig. 7A FIG. 4 is a schematic diagram of an optical lens assembly according to a seventh embodiment of the present invention at a far point.

[0059] Figure 7B FIG. 4 is a schematic diagram of an optical lens assembly according to a seventh embodiment of the present invention at a near point.

[0060] Fig. 8A FIG. 4 is a schematic diagram of an optical lens assembly according to an eighth embodiment of the present invention at a far point.

[0061] Figure 8B FIG. 4 is a schematic diagram of an optical lens assembly according to an eighth embodiment of the present invention at a near point.

[0062] Fig. 9 FIG. 4 is a schematic diagram of a head mounted electronic device according to an embodiment of the present invention.

[0063] Description of Figure Numbers

[0064] 1 00, 200, 300, 400, 500, 600, 700, 800: light bar

[0065] 110, 210, 310, 410, 510, 610, 710, 810: First lens

[0066] 111, 211, 311, 411, 511, 611, 711, 811: eye side surface

[0067] 112, 212, 312, 412, 512, 612, 712, 812: Image source side surface

[0068] 120, 220, 320, 420, 520, 620, 720, 820: Second lens

[0069] 121,221,321,421,521,62l,72l,821: eye side surface

[0070] 122,222,322,422,522,622,722,822: Image source side surface

[0071] 130, 230, 330, 430, 530, 630, 730, 830: Third lens

[0072] 131,23l,33l,43l,53l,63l,73l,83l: eye side surface

[0073] 132, 232, 332, 432, 532, 632, 732, 832: Image source side surface

[0074] P: Optical Group

[0075] 141,241,341,441,541,641,741,841: First absorption polarizing element

[0076] 142,242,342,442,542,642,742,842: Reflective polarizing elements

[0077] 143,243,343,443,543,643,743,843: First phase delay element

[0078] 144,244,344,444,544,644,744,844: Partially reflective and partially transmissive elements

[0079] 151,251,351,451,551,651,751,851: Second phase delay element

[0080] 152,252,352,452,552,652,752,852: Second absorption polarizing element

[0081] 181,28l,38l,481,581,681,781,88l: Shadow source surface

[0082] 183,283,383,483,583,683,783,883: Image source

[0083] 190, 290, 390, 490, 590, 690, 790, 890: optical axis

[0084] 9: Head-mounted electronic devices

[0085] 910: Shell

[0086] 920: Optical machine module

[0087] 930: Image source

[0088] 940: Controller

[0089] L: Light path

[0090] TDP2: The absolute value of the displacement parallel to the optical axis from the intersection of the image source side surface of the first lens on the optical axis to the maximum effective radius position of the image source side surface of the first lens

[0091] TDP3: The absolute value of the displacement parallel to the optical axis from the intersection of the eye-side surface of the second lens on the optical axis to the maximum effective radius position of the eye-side surface of the second lens

[0092] TDP5: The absolute value of the displacement parallel to the optical axis from the intersection of the eye-side surface of the third lens on the optical axis to the maximum effective radius position of the eye-side surface of the third lens

[0093] TDP6: The absolute value of the displacement parallel to the optical axis from the intersection of the image source side surface of the third lens on the optical axis to the maximum effective radius position of the image source side surface of the third lens DETAILED DESCRIPTION

[0094] <First Embodiment>

[0095] Please refer to Figures 1A to 1C As shown, the optical lens set of the first embodiment includes, in order from the eye side to the image source side along the optical axis 190, a light barrier 100, a first absorbing polarizing element 141, a reflecting polarizing element 142, a first phase delay element 143, a first lens 110, a second lens 120, a partially reflecting and partially transmitting element 144, a third lens 130, a second phase delay element 151, a second absorbing polarizing element 152, and an image source surface 181. The first absorbing polarizing element 141, the reflecting polarizing element 142, the first phase delay element 143, the first lens 110, the second lens 120, and the partially reflecting and partially transmitting element 144 constitute an optical group P; the optical lens group P consists of a near point (such as Figure 1B ) Zoom to a far point (such as Figure 1A ), the optical group P moves from the image source side to the eye side. The total number of lenses with refractive power in the optical lens group is, for example but not limited to, 3.

[0096] The position of the light barrier 100 may be the position where the user's eyes view the image.

[0097] The first lens 110 has positive refractive power and is made of plastic. Its eye-side surface 111 is a plane at the near optical axis 190 , and its image source-side surface 112 is a convex surface at the near optical axis 190 . The image source-side surface 112 of the first lens 110 is aspherical.

[0098] The second lens 120 has negative refractive power and is made of plastic, and its eye-side surface 121 is concave at the near optical axis 190, and its image source-side surface 122 is convex at the near optical axis 190, and both the eye-side surface 121 and the image source-side surface 122 of the second lens 120 are aspherical surfaces. The second lens 120 and the first lens 110 are glued together.

[0099] The third lens 130 has positive refractive power and is made of plastic. Its eye-side surface 131 is convex at the near optical axis 190 , and its image source-side surface 132 is convex at the near optical axis 190 . Both the eye-side surface 131 and the image source-side surface 132 of the third lens 130 are aspherical.

[0100] The first phase delay element 143 is disposed on the eye-side surface 111 of the first lens 110. The first phase delay element 143 is, for example but not limited to, a quarter wave plate.

[0101] The reflective polarizing element 142 is disposed on the first phase delay element 143 .

[0102] The first absorption polarization element 141 is disposed on the reflection polarization element 142 .

[0103] The partially reflective and partially transmissive element 144 is disposed (for example but not limited to coating) on ​​the image source side surface 122 of the second lens 120, and has an average light reflectivity of at least 30% in the visible light range, preferably an average light reflectivity of 50%. The average light reflectivity here refers to the average value of the reflectivity of the partially reflective and partially transmissive element 144 for light of different wavelengths. At the same time, the partially reflective and partially transmissive element 144 is disposed between the first lens 110 and the third lens 130.

[0104] The second absorption polarizing element 152 is disposed on the image source surface 181 .

[0105] The second phase delay element 151 is disposed on the second absorption polarization element 152 , and is, for example but not limited to, a quarter wave plate.

[0106] The optical lens assembly can be used in conjunction with an image source 183, and the image source 183 can be disposed on the image source plane 181. In this embodiment, the image source 183 is, for example but not limited to, an OLED display, an LED display, a liquid crystal display, or other displays.

[0107] The curve equations of the aspheric surfaces of the above lenses are expressed as follows:

[0108]

[0109] Wherein z is the position value at a height of h along the optical axis 190 with the surface vertex as a reference; c is the curvature of the lens surface at the near optical axis and is the reciprocal of the radius of curvature (R) (c=1 / R), R is the radius of curvature of the lens surface at the near optical axis; h is the vertical distance from the lens surface to the optical axis 190; k is the conic constant; Ai is the i-th order aspheric coefficient.

[0110] In the first embodiment, the optical lens group can be configured by combining an absorption polarizing element, a reflection polarizing element, a phase delay element, a partially reflecting and partially transmitting element and a lens, and folding the light path by utilizing the penetration and reflection of light without affecting the quality of the image, so as to compress the length of the lens group required to form the image. Please refer to Figure 1C In the optical path L shown in the figure, the unpolarized light beam emitted by the image source 183 forms a linearly polarized light beam after passing through the second absorption polarizing element 152, and the linearly polarized light beam forms a circularly polarized light beam after passing through the second phase delay element 151. The circularly polarized light beam passes through the third lens 130 and travels to the partially reflective and partially transmissive element 144. At this time, part of the circularly polarized light beam penetrates the partially reflective and partially transmissive element 144, and passes through the second lens 120, the first lens 110 and the first phase delay element 143 in sequence, and is converted into a linearly polarized light beam by the first phase delay element 143; then, the linearly polarized light beam travels to the reflective polarizing element 142. Since the polarization direction of the linearly polarized light beam is consistent with the reflection direction of the reflective polarizing element 142, The linear polarized light beam is parallel to the axis, so the linear polarized light beam is reflected by the reflective polarizing element 142, and passes through the first phase delay element 143 again to be converted into a circular polarized light beam, and then passes through the first lens 110 and the second lens 120 to travel to the partially reflective and partially transmissive element 144. At this time, part of the circular polarized light beam is reflected by the partially reflective and partially transmissive element 144, and passes through the second lens 120, the first lens 110 and the first phase delay element 143 in sequence, and is converted into a linear polarized light beam by the first phase delay element 143. The polarization direction of the linear polarized light beam is perpendicular to the reflection axis of the reflective polarizing element 142, so it passes through the reflective polarizing element 142 and the first absorptive polarizing element 141 in sequence to enter the user's eyes.

[0111] Please refer to Tables 1 to 4. Table 1 shows the detailed optical data of each element in the optical lens set of the first embodiment. Table 2 shows the aspheric coefficients of the lenses of the optical lens set of the first embodiment. Table 3 shows the remaining parameters and their values ​​of the optical lens set of the first embodiment. The values ​​of the parameters in Tables 1 and 3 satisfy the conditional formula in Table 4.

[0112] The overall focal length of the optical lens group at the near point is f_N. The overall focal length of the optical lens group at the far point is f_F. The combined focal length of the first lens 110 and the second lens 120 is f12. The focal length of the first lens 110 is f1. The focal length of the second lens 120 is f2. The focal length of the third lens 130 is f3. The maximum viewing angle of the optical lens group when focusing on the near point is FOV_N, and the maximum viewing angle of the optical lens group when focusing on the far point is FOV_F. The entrance pupil diameter of the optical lens group is EPD. The radius of curvature of the image source side surface 112 of the first lens 110 is R2. The radius of curvature of the eye side surface 121 of the second lens 120 is R3. The radius of curvature of the image source side surface 122 of the second lens 120 is R4. The radius of curvature of the eye side surface 131 of the third lens 130 is R5. The curvature radius of the image source side surface 132 of the third lens 130 is R6. The thickness of the first lens 110 on the optical axis 190 is CT1. The thickness of the second lens 120 on the optical axis 190 is CT2. The thickness of the third lens 130 on the optical axis 190 is CT3. When the optical lens group is at a far point, the distance from the image source side surface 122 of the second lens 120 of the optical group to the eye side surface 131 of the third lens 130 on the optical axis 190 is T23_F. When the optical lens group is at a near point, the distance from the image source side surface 122 of the second lens 120 of the optical group P to the eye side surface 131 of the third lens 130 on the optical axis 190 is T23_N. The maximum effective radius of the image source side surface 112 of the first lens 110 is CA2. The maximum effective radius of the eye side surface 121 of the second lens 120 is CA3. The maximum effective radius of the eye side surface 131 of the third lens 130 is CA5. The maximum effective radius of the image source side surface 132 of the third lens 130 is CA6. The absolute value of the displacement from the intersection of the image source side surface 112 of the first lens 110 on the optical axis 190 to the maximum effective radius position of the image source side surface 112 of the first lens 110 parallel to the optical axis 190 is TDP2. The absolute value of the displacement from the intersection of the eye side surface 121 of the second lens 120 on the optical axis 190 to the maximum effective radius position of the eye side surface 121 of the second lens 120 parallel to the optical axis 190 is TDP3. The absolute value of the displacement from the intersection of the eye side surface 131 of the third lens 130 on the optical axis 190 to the maximum effective radius position of the eye side surface 131 of the third lens 130 parallel to the optical axis 190 is TDP5. The absolute value of the displacement from the intersection of the image source side surface 132 of the third lens 130 on the optical axis 190 to the maximum effective radius position of the image source side surface 132 of the third lens 130 parallel to the optical axis 190 is TDP6.

[0113]

[0114]

[0115]

[0116]

[0117]

[0118] In Table 1, the units of the radius of curvature, thickness, gap and focal length are in mm, and surfaces 19 to 0 represent the surfaces that the light passes through in sequence from the image source surface 181 to the light barrier 100 along the optical path L, wherein: surface 0 corresponds to the gap between the light barrier 100 (or the user's eye) and the first absorption-type polarizing element 141 on the optical axis 190; surface 1 corresponds to the thickness of the first absorption-type polarizing element 141 on the optical axis 190; surfaces 2, 9, and 10 correspond to the thickness of the reflection-type polarizing element 142 on the optical axis 190; surfaces 3, 8, and 11 correspond to the thickness of the first phase delay element 143 on the optical axis 190; surfaces 4, 7, and 12 correspond to the thickness of the first lens 110 on the optical axis 190; surfaces 5 and 13 correspond to the thickness of the second The thickness of the lens 120 on the optical axis 190, surface 6 corresponds to the gap between the image source side surface 122 of the second lens 120 and the eye side surface 121 of the second lens 120 on the optical axis 190, and this gap is equivalent to the thickness of the second lens 120 on the optical axis 190; surface 14 corresponds to the gap between the second lens 120 and the third lens 130 on the optical axis 190; surface 15 corresponds to the thickness of the third lens 130 on the optical axis 190; surface 16 corresponds to the gap between the third lens 130 and the second phase delay element 151 on the optical axis 190; surface 17 corresponds to the thickness of the second phase delay element 151 on the optical axis 190; surface 18 corresponds to the thickness of the second absorption polarizing element 152 on the optical axis 190. In Table 1, the gaps and thicknesses represented by positive values ​​are the values ​​corresponding to the direction of the light toward the light barrier 100, and the gaps and thicknesses represented by negative values ​​are the values ​​corresponding to the direction of the light toward the image source surface 181.

[0119] In Table 2, k is the cone coefficient in the aspheric curve equation, and A2, A4, A6, A8, A10, A12, A14, A16, A18 and A20 are high-order aspheric coefficients.

[0120] In addition, the following tables of the embodiments correspond to the schematic diagrams of the embodiments. The definitions of the data in the tables are the same as those in Tables 1 to 4 of the first embodiment, but the definitions of the surface numbers in Table 1 will change in each embodiment with the number of lenses and the position of the optical element. The relevant descriptions of each embodiment can refer to the definition of the surface numbers in Table 1, which will not be repeated.

[0121] <Second Embodiment>

[0122] Please refer to Figure 2A and Figure 2B As shown, the optical lens set of the second embodiment includes, in order from the eye side to the image source side along the optical axis 290, a light barrier 200, a first absorbing polarizing element 241, a reflecting polarizing element 242, a first phase delay element 243, a first lens 210, a second lens 220, a partially reflecting and partially transmitting element 244, a third lens 230, a second phase delay element 251, a second absorbing polarizing element 252, and an image source surface 281. The first absorbing polarizing element 241, the reflecting polarizing element 242, the first phase delay element 243, the first lens 210, the second lens 220, and the partially reflecting and partially transmitting element 244 constitute an optical group P; the optical lens group P consists of a near point (such as Figure 2B ) Zoom to a far point (such as Figure 2A ), the optical group P moves from the image source side to the eye side. The total number of lenses with refractive power in the optical lens group is, for example but not limited to, 3.

[0123] The position of the light barrier 200 may be the position where the user's eyes view the image.

[0124] The first lens 210 has negative refractive power and is made of plastic. Its eye-side surface 211 is a plane at the near optical axis 290 , and its image source-side surface 212 is a concave surface at the near optical axis 290 . The image source-side surface 212 of the first lens 210 is aspherical.

[0125] The second lens 220 has positive refractive power and is made of plastic, and its eye-side surface 221 is convex at the near optical axis 290, and its image source-side surface 222 is convex at the near optical axis 290, and both the eye-side surface 221 and the image source-side surface 222 of the second lens 220 are aspherical surfaces. The second lens 220 and the first lens 210 are glued together.

[0126] The third lens 230 has positive refractive power and is made of plastic. Its eye-side surface 231 is convex at the near optical axis 290 , and its image source-side surface 232 is convex at the near optical axis 290 . Both the eye-side surface 231 and the image source-side surface 232 of the third lens 230 are aspherical.

[0127] The configuration and characteristics of the first phase delay element 243, the reflective polarizing element 242, and the first absorptive polarizing element 241 can refer to the configuration and characteristics of the first phase delay element 143, the reflective polarizing element 142, and the first absorptive polarizing element 141 of the first embodiment, and will not be repeated here.

[0128] The partially reflective and partially transmissive element 244 is disposed (for example but not limited to coating) on ​​the image source side surface 222 of the second lens 220, and has an average light reflectivity of at least 30% in the visible light range, preferably an average light reflectivity of 50%. The average light reflectivity here refers to the average value of the reflectivity of the partially reflective and partially transmissive element 244 for light of different wavelengths. At the same time, the partially reflective and partially transmissive element 244 is disposed between the first lens 210 and the third lens 230.

[0129] The configuration and characteristics of the second absorption polarizing element 252 and the second phase delay element 251 may refer to the configuration and characteristics of the second absorption polarizing element 152 and the second phase delay element 151 of the first embodiment, and will not be described in detail herein.

[0130] The optical lens assembly can be used in conjunction with an image source 283, and the image source 283 can be disposed on the image source plane 281. In this embodiment, the type of the image source 283 is, for example but not limited to, an OLED display, an LED display, a liquid crystal display, or other displays.

[0131] Please refer to Tables 5 to 8 below. Table 5 shows the detailed optical data of each element in the optical lens set of the second embodiment. Table 6 shows the aspheric coefficients of the lenses of the optical lens set of the second embodiment. Table 7 shows the remaining parameters and their values ​​of the optical lens set of the second embodiment. The values ​​of the parameters in Tables 5 and 7 meet the conditional equations in Table 8. The curve equation of the aspheric surface of the second embodiment is the same as the curve equation of the aspheric surface of the first embodiment. The definition of each surface in Table 5 can refer to the relevant description of Table 1, and will not be repeated here.

[0132]

[0133]

[0134]

[0135]

[0136]

[0137] <Third Embodiment>

[0138] Please refer to Figure 3A and Figure 3BAs shown, the optical lens set of the third embodiment includes, in order from the eye side to the image source side along the optical axis 390, a light barrier 300, a first absorbing polarizing element 341, a reflecting polarizing element 342, a first phase delay element 343, a first lens 310, a second lens 320, a partially reflecting and partially transmitting element 344, a third lens 330, a second phase delay element 351, a second absorbing polarizing element 352, and an image source surface 381. The first absorbing polarizing element 341, the reflecting polarizing element 342, the first phase delay element 343, the first lens 310, the second lens 320, and the partially reflecting and partially transmitting element 344 constitute an optical group P; the optical lens group P consists of a near point (such as Figure 3B ) Zoom to a far point (such as Figure 3A ), the optical group P moves from the image source side to the eye side. The total number of lenses with refractive power in the optical lens group is, for example but not limited to, 3.

[0139] The position of the light barrier 300 may be the position where the user's eyes view the image.

[0140] The first lens 310 has positive refractive power and is made of plastic. Its eye-side surface 311 is flat at the near optical axis 390 , and its image source-side surface 312 is convex at the near optical axis 390 . The image source-side surface 312 of the first lens 310 is aspherical.

[0141] The second lens 320 has positive refractive power and is made of plastic. Its eye-side surface 321 is concave at the near optical axis 390 , and its image source-side surface 322 is convex at the near optical axis 390 . Both the eye-side surface 321 and the image source-side surface 322 of the second lens 320 are aspherical.

[0142] The third lens 330 has positive refractive power and is made of plastic. Its eye-side surface 331 is convex at the near optical axis 390 , and its image source-side surface 332 is convex at the near optical axis 390 . Both the eye-side surface 331 and the image source-side surface 332 of the third lens 330 are aspherical.

[0143] The configuration and characteristics of the first phase delay element 343, the reflective polarizing element 342, and the first absorptive polarizing element 341 can refer to the configuration and characteristics of the first phase delay element 143, the reflective polarizing element 142, and the first absorptive polarizing element 141 of the first embodiment, and will not be repeated here.

[0144] The partially reflective and partially transmissive element 344 is disposed (for example but not limited to coating) on ​​the image source side surface 322 of the second lens 320, and has an average light reflectivity of at least 30% in the visible light range, preferably an average light reflectivity of 50%. The average light reflectivity here refers to the average value of the reflectivity of the partially reflective and partially transmissive element 344 for light of different wavelengths. At the same time, the partially reflective and partially transmissive element 344 is disposed between the first lens 310 and the third lens 330.

[0145] The configuration and characteristics of the second absorption polarizing element 352 and the second phase delay element 351 may refer to the configuration and characteristics of the second absorption polarizing element 152 and the second phase delay element 151 of the first embodiment, and will not be described in detail herein.

[0146] The optical lens assembly can be used in conjunction with an image source 383, and the image source 383 can be disposed on the image source plane 381. In this embodiment, the type of the image source 383 is, for example but not limited to, an OLED display, a LED display, a liquid crystal display or other displays.

[0147] Please refer to Tables 9 to 12 below. Table 9 shows detailed optical data of each element in the optical lens set of the third embodiment. Table 10 shows the aspheric coefficients of the lenses of the optical lens set of the third embodiment. Table 11 shows the remaining parameters and their values ​​of the optical lens set of the third embodiment. The values ​​of the parameters in Tables 9 and 11 meet the conditional equations in Table 12. The curve equation of the aspheric surface of the third embodiment is the same as the curve equation of the aspheric surface of the first embodiment. The definition of each surface in Table 9 can refer to the relevant description of Table 1, and will not be repeated here.

[0148]

[0149]

[0150]

[0151]

[0152]

[0153]

[0154] <Fourth real example>

[0155] Please refer to Figure 4A and Figure 4BAs shown, the optical lens set of the fourth embodiment includes, in order from the eye side to the image source side along the optical axis 490, a light barrier 400, a first absorbing polarizing element 441, a reflecting polarizing element 442, a first phase delay element 443, a first lens 410, a partially reflecting and partially transmitting element 444, a second lens 420, a third lens 430, a second phase delay element 451, a second absorbing polarizing element 452, and an image source surface 481. The first absorbing polarizing element 441, the reflecting polarizing element 442, the first phase delay element 443, the first lens 410, the partially reflecting and partially transmitting element 444, and the second lens 420 form an optical group P; the optical lens group P consists of a near point (such as Figure 4B ) Zoom to a far point (such as Figure 4A ), the optical group P moves from the image source side to the eye side. The total number of lenses with refractive power in the optical lens group is, for example but not limited to, 3.

[0156] The position of the light barrier 400 may be the position where the user's eyes view the image.

[0157] The first lens 410 has positive refractive power and is made of plastic. Its eye-side surface 411 is flat at the near optical axis 490 , and its image source-side surface 412 is convex at the near optical axis 490 . The image source-side surface 412 of the first lens 410 is aspherical.

[0158] The second lens 420 has negative refractive power and is made of plastic. Its eye-side surface 421 is concave at the near optical axis 490, and its image source-side surface 422 is convex at the near optical axis 490. Both the eye-side surface 421 and the image source-side surface 422 of the second lens 420 are aspherical.

[0159] The third lens 430 has positive refractive power and is made of plastic. Its eye-side surface 431 is convex at the near optical axis 490, and its image source-side surface 432 is convex at the near optical axis 490. Both the eye-side surface 431 and the image source-side surface 432 of the third lens 430 are aspherical.

[0160] The configuration and characteristics of the first phase delay element 443, the reflective polarizing element 442, and the first absorptive polarizing element 441 can refer to the configuration and characteristics of the first phase delay element 143, the reflective polarizing element 142, and the first absorptive polarizing element 141 of the first embodiment, and will not be repeated here.

[0161] The partially reflective and partially transmissive element 444 is disposed (for example but not limited to coating) on ​​the image source side surface 412 of the first lens 410, and has an average light reflectivity of at least 30% in the visible light range, preferably an average light reflectivity of 50%. The average light reflectivity here refers to the average value of the reflectivity of the partially reflective and partially transmissive element 444 for light of different wavelengths. At the same time, the partially reflective and partially transmissive element 444 is disposed between the first lens 410 and the third lens 430.

[0162] The configuration and characteristics of the second absorption polarizing element 452 and the second phase delay element 451 can refer to the configuration and characteristics of the second absorption polarizing element 152 and the second phase delay element 151 of the first embodiment, and will not be described in detail here.

[0163] The optical lens assembly can be used in conjunction with an image source 483, and the image source 483 can be disposed on the image source plane 481. In this embodiment, the type of the image source 483 is, for example but not limited to, an OLED display, an LED display, a liquid crystal display or other displays.

[0164] Please refer to Tables 13 to 16 below. Table 13 shows the detailed optical data of each element in the optical lens set of the fourth embodiment. Table 14 shows the aspheric coefficients of the lenses of the optical lens set of the fourth embodiment. Table 15 shows the remaining parameters and their values ​​of the optical lens set of the fourth embodiment. The values ​​of the parameters in Tables 13 and 15 meet the conditional equations in Table 16. The curve equation of the aspheric surface of the fourth embodiment is the same as the curve equation of the aspheric surface of the first embodiment. The definition of each surface in Table 13 can refer to the relevant description of Table 1, and will not be repeated here.

[0165]

[0166]

[0167]

[0168]

[0169]

[0170]

[0171] <Fifth Embodiment>

[0172] Please refer to Figure 5A and Figure 5BAs shown, the optical lens set of the fifth embodiment includes, in order from the eye side to the image source side along the optical axis 590, a light barrier 500, a first absorbing polarizing element 541, a reflecting polarizing element 542, a first phase delay element 543, a first lens 510, a partially reflecting and partially transmitting element 544, a second lens 420, a third lens 530, a second phase delay element 551, a second absorbing polarizing element 552, and an image source surface 581. The first absorbing polarizing element 541, the reflecting polarizing element 542, the first phase delay element 543, the first lens 510, the partially reflecting and partially transmitting element 544, and the second lens 520 form an optical group P; the optical lens group P consists of a near point (such as Figure 5B ) Zoom to a far point (such as Figure 5A ), the optical group P moves from the image source side to the eye side. The total number of lenses with refractive power in the optical lens group is, for example but not limited to, 3.

[0173] The position of the light barrier 500 may be the position where the user's eyes view the image.

[0174] The first lens 510 has positive refractive power and is made of plastic. Its eye-side surface 511 is flat at the near optical axis 590 , its image source-side surface 512 is convex at the near optical axis 590 , and the image source-side surface 512 of the first lens 510 is aspherical.

[0175] The second lens 520 has positive refractive power and is made of plastic. Its eye-side surface 521 is convex at the near optical axis 590, and its image source-side surface 522 is convex at the near optical axis 590. Both the eye-side surface 521 and the image source-side surface 522 of the second lens 520 are aspherical.

[0176] The third lens 530 has negative refractive power and is made of plastic. Its eye-side surface 531 is concave at the near optical axis 590, and its image source-side surface 532 is convex at the near optical axis 590. Both the eye-side surface 531 and the image source-side surface 532 of the third lens 530 are aspherical.

[0177] The configuration and characteristics of the first phase delay element 543, the reflective polarizing element 542, and the first absorptive polarizing element 541 can refer to the configuration and characteristics of the first phase delay element 143, the reflective polarizing element 142, and the first absorptive polarizing element 141 of the first embodiment, and will not be repeated here.

[0178] The partially reflective and partially transmissive element 544 is disposed (for example but not limited to coating) on ​​the image source side surface 512 of the first lens 510, and has an average light reflectivity of at least 30% in the visible light range, preferably an average light reflectivity of 50%. The average light reflectivity here refers to the average value of the reflectivity of the partially reflective and partially transmissive element 544 for light of different wavelengths. At the same time, the partially reflective and partially transmissive element 544 is disposed between the first lens 510 and the third lens 530.

[0179] The configuration and characteristics of the second absorption polarizing element 552 and the second phase delay element 551 can refer to the configuration and characteristics of the second absorption polarizing element 152 and the second phase delay element 151 of the first embodiment, and will not be described in detail here.

[0180] The optical lens assembly can be used in conjunction with an image source 583, and the image source 583 can be disposed on the image source plane 581. In this embodiment, the type of the image source 583 is, for example but not limited to, an OLED display, an LED display, a liquid crystal display or other displays.

[0181] Please refer to Tables 17 to 20 below. Table 17 shows the detailed optical data of each element in the optical lens set of the fifth embodiment. Table 18 shows the aspheric coefficients of the lenses of the optical lens set of the fifth embodiment. Table 19 shows the remaining parameters and their values ​​of the optical lens set of the fifth embodiment. The values ​​of the parameters in Tables 17 and 19 meet the conditional equations in Table 20. The curve equation of the aspheric surface of the fifth embodiment is the same as the curve equation of the aspheric surface of the first embodiment. The definition of each surface in Table 17 can refer to the relevant description of Table 1, and will not be repeated here.

[0182]

[0183]

[0184]

[0185]

[0186]

[0187]

[0188] <Sixth Embodiment>

[0189] Please refer to Fig. 6A and Figure 6BAs shown, the optical lens set of the sixth embodiment includes, in order from the eye side to the image source side along the optical axis 690, a light barrier 600, a first absorbing polarizing element 641, a reflecting polarizing element 642, a first phase delay element 643, a first lens 610, a partially reflecting and partially transmitting element 644, a second lens 620, a third lens 630, a second phase delay element 651, a second absorbing polarizing element 652, and an image source surface 681. The first absorbing polarizing element 641, the reflecting polarizing element 642, the first phase delay element 643, the first lens 610, the partially reflecting and partially transmitting element 644, and the second lens 620 form an optical group P; the optical lens group P consists of a near point (such as Figure 6B ) Zoom to a far point (such as Fig. 6A ), the optical group P moves from the image source side to the eye side. The total number of lenses with refractive power in the optical lens group is, for example but not limited to, 3.

[0190] The position of the light barrier 600 may be the position where the user's eyes view the image.

[0191] The first lens 610 has positive refractive power and is made of plastic. Its eye-side surface 611 is a plane at the near optical axis 690 , and its image source-side surface 612 is a convex surface at the near optical axis 690 . The image source-side surface 612 of the first lens 610 is aspherical.

[0192] The second lens 620 has negative refractive power and is made of plastic. Its eye-side surface 621 is concave at the near optical axis 690 , and its image source-side surface 622 is concave at the near optical axis 690 . Both the eye-side surface 621 and the image source-side surface 622 of the second lens 620 are aspherical.

[0193] The third lens 630 has positive refractive power and is made of plastic. Its eye-side surface 631 is convex at the near optical axis 690, and its image source side surface 632 is convex at the near optical axis 690. The eye-side surface 631 of the third lens 630 is aspherical, and the image source side surface 632 of the third lens 630 is spherical.

[0194] The configuration and characteristics of the first phase delay element 643, the reflective polarizing element 642, and the first absorptive polarizing element 641 can refer to the configuration and characteristics of the first phase delay element 143, the reflective polarizing element 142, and the first absorptive polarizing element 141 of the first embodiment, and will not be repeated here.

[0195] The partially reflective and partially transmissive element 644 is disposed (for example but not limited to coating) on ​​the eye-side surface 622 of the second lens 620, and has an average light reflectivity of at least 30% in the visible light range, preferably an average light reflectivity of 50%. The average light reflectivity here refers to the average value of the reflectivity of the partially reflective and partially transmissive element 644 for light of different wavelengths. At the same time, the partially reflective and partially transmissive element 644 is disposed between the first lens 610 and the third lens 630.

[0196] The configuration and characteristics of the second absorption polarizing element 652 and the second phase delay element 651 may refer to the configuration and characteristics of the second absorption polarizing element 152 and the second phase delay element 151 of the first embodiment, and will not be described in detail herein.

[0197] The optical lens assembly can be used in conjunction with an image source 683, and the image source 683 can be disposed on the image source plane 681. In this embodiment, the type of the image source 683 is, for example but not limited to, an OLED display, a LED display, a liquid crystal display or other displays.

[0198] Please refer to Tables 21 to 24 below. Table 21 shows the detailed optical data of each element in the optical lens set of the sixth embodiment. Table 22 shows the aspheric coefficients of the lenses of the optical lens set of the sixth embodiment. Table 23 shows the remaining parameters and their values ​​of the optical lens set of the sixth embodiment. The values ​​of the parameters in Tables 21 and 23 meet the conditional equations in Table 24. The curve equation of the aspheric surface of the sixth embodiment is the same as the curve equation of the aspheric surface of the first embodiment. The definition of each surface in Table 21 can refer to the relevant description of Table 1, and will not be repeated here.

[0199]

[0200]

[0201]

[0202]

[0203]

[0204]

[0205] <Seventh Embodiment>

[0206] Please refer to Fig. 7A and Figure 7BAs shown, the optical lens set of the seventh embodiment includes, in order from the eye side to the image source side along the optical axis 790, a light barrier 700, a first absorbing polarizing element 741, a reflecting polarizing element 742, a first phase delay element 743, a first lens 710, a partially reflecting and partially transmitting element 744, a second lens 720, a third lens 730, a second phase delay element 751, a second absorbing polarizing element 752, and an image source surface 781. The first absorbing polarizing element 741, the reflecting polarizing element 742, the first phase delay element 743, the first lens 710, the partially reflecting and partially transmitting element 744, and the second lens 720 form an optical group P; the optical lens group P consists of a near point (such as Figure 7B ) Zoom to a far point (such as Fig. 7A ), the optical group P moves from the image source side to the eye side. The total number of lenses with refractive power in the optical lens group is, for example but not limited to, 3.

[0207] The position of the light barrier 700 may be the position where the user's eyes view the image.

[0208] The first lens 710 has positive refractive power and is made of plastic. Its eye-side surface 711 is a plane at the near optical axis 790 , and its image source-side surface 712 is a convex surface at the near optical axis 790 . The image source-side surface 712 of the first lens 710 is aspherical.

[0209] The second lens 720 has positive refractive power and is made of plastic. Its eye-side surface 721 is concave at the near optical axis 790, and its image source-side surface 722 is convex at the near optical axis 790. Both the eye-side surface 721 and the image source-side surface 722 of the second lens 720 are aspherical.

[0210] The third lens 730 has positive refractive power and is made of plastic. Its eye-side surface 731 is convex at the near optical axis 790, and its image source-side surface 732 is convex at the near optical axis 790. Both the eye-side surface 731 and the image source-side surface 732 of the third lens 730 are aspherical.

[0211] The configuration and characteristics of the first phase delay element 743, the reflective polarizing element 742, and the first absorptive polarizing element 741 can refer to the configuration and characteristics of the first phase delay element 143, the reflective polarizing element 142, and the first absorptive polarizing element 141 of the first embodiment, and will not be repeated here.

[0212] The partially reflective and partially transmissive element 744 is disposed (for example but not limited to coating) on ​​the eye-side surface 722 of the second lens 720, and has an average light reflectivity of at least 30% in the visible light range, preferably an average light reflectivity of 50%. The average light reflectivity here refers to the average value of the reflectivity of the partially reflective and partially transmissive element 744 for light of different wavelengths. At the same time, the partially reflective and partially transmissive element 744 is disposed between the first lens 710 and the third lens 730.

[0213] The configuration and characteristics of the second absorption polarizing element 752 and the second phase delay element 751 can refer to the configuration and characteristics of the second absorption polarizing element 152 and the second phase delay element 151 of the first embodiment, and will not be repeated here.

[0214] The optical lens assembly can be used in conjunction with an image source 783, and the image source 783 can be disposed on the image source surface 781. In this embodiment, the type of the image source 783 is, for example but not limited to, an OLED display, an LED display, a liquid crystal display, or other displays.

[0215] Please refer to Tables 25 to 28 below. Table 25 shows the detailed optical data of each element in the optical lens set of the seventh embodiment. Table 26 shows the aspheric coefficients of the lenses of the optical lens set of the seventh embodiment. Table 27 shows the remaining parameters and their values ​​of the optical lens set of the seventh embodiment. The values ​​of the parameters in Tables 25 and 27 meet the conditional equations in Table 28. The curve equation of the aspheric surface of the seventh embodiment is the same as the curve equation of the aspheric surface of the first embodiment. The definition of each surface in Table 25 can refer to the relevant description of Table 1, and will not be repeated here.

[0216]

[0217]

[0218]

[0219]

[0220]

[0221] <Eighth Embodiment>

[0222] Please refer to Fig. 8A and Figure 8BAs shown, the optical lens set of the eighth embodiment includes, in order from the eye side to the image source side along the optical axis 890, a light barrier 800, a first absorbing polarizing element 841, a reflecting polarizing element 842, a first phase delay element 843, a first lens 810, a partially reflecting and partially transmitting element 844, a second lens 820, a third lens 830, a second phase delay element 851, a second absorbing polarizing element 852, and an image source surface 881. The first absorbing polarizing element 841, the reflecting polarizing element 842, the first phase delay element 843, the first lens 810, the partially reflecting and partially transmitting element 844, and the second lens 820 form an optical group P; the optical lens group P consists of a near point (such as Figure 8B ) Zoom to a far point (such as Fig. 8A ), the optical group P moves from the image source side to the eye side. The total number of lenses with refractive power in the optical lens group is, for example but not limited to, 3.

[0223] The position of the light barrier 800 may be the position where the user's eyes view the image.

[0224] The first lens 810 has positive refractive power and is made of plastic. Its eye-side surface 811 is a plane at the near optical axis 890 , its image source-side surface 812 is a convex surface at the near optical axis 890 , and the image source-side surface 812 of the first lens 810 is aspherical.

[0225] The second lens 820 has negative refractive power and is made of plastic. Its eye-side surface 821 is concave at the near optical axis 890 , its image source-side surface 822 is flat at the near optical axis 890 , and its eye-side surface 821 is aspherical.

[0226] The third lens 830 has positive refractive power and is made of plastic. Its eye-side surface 831 is convex at the near optical axis 890, and its image source side surface 832 is convex at the near optical axis 890. The eye-side surface 831 of the third lens 830 is spherical, and the image source side surface 832 of the third lens 830 is aspherical.

[0227] The configuration and characteristics of the first phase delay element 843, the reflective polarizing element 842, and the first absorptive polarizing element 841 can refer to the configuration and characteristics of the first phase delay element 143, the reflective polarizing element 142, and the first absorptive polarizing element 141 of the first embodiment, and will not be repeated here.

[0228] The partially reflective and partially transmissive element 844 is disposed (for example but not limited to coating) on ​​the eye-side surface 822 of the second lens 820, and has an average light reflectivity of at least 30% in the visible light range, preferably an average light reflectivity of 50%. The average light reflectivity here refers to the average value of the reflectivity of the partially reflective and partially transmissive element 844 for light of different wavelengths. At the same time, the partially reflective and partially transmissive element 844 is disposed between the first lens 810 and the third lens 830.

[0229] The configuration and characteristics of the second absorption polarizing element 852 and the second phase delay element 851 can refer to the configuration and characteristics of the second absorption polarizing element 852 and the second phase delay element 851 in the first embodiment, and will not be described in detail here.

[0230] The optical lens assembly can be used in conjunction with an image source 883, and the image source 883 can be disposed on an image source surface 881. In this embodiment, the type of the image source 883 is, for example but not limited to, an OLED display, an LED display, a liquid crystal display, or other displays.

[0231] Please refer to Tables 29 to 32 below. Table 29 shows the detailed optical data of each element in the optical lens set of the eighth embodiment. Table 30 shows the aspheric coefficients of the lenses of the optical lens set of the eighth embodiment. Table 31 shows the remaining parameters and their values ​​of the optical lens set of the eighth embodiment. The values ​​of the parameters in Tables 29 and 31 meet the conditional equations in Table 32. The curve equation of the aspheric surface of the eighth embodiment is the same as the curve equation of the aspheric surface of the first embodiment. The definition of each surface in Table 29 can refer to the relevant description of Table 1, and will not be repeated here.

[0232]

[0233]

[0234]

[0235]

[0236]

[0237]

[0238] In the optical lens set provided by the present invention, the lens can be made of plastic or glass. When the lens is made of plastic, the production cost can be effectively reduced; when the lens is made of glass, the degree of freedom of the refractive power configuration of the optical lens set can be increased.

[0239] In the optical lens assembly provided by the present invention, the aspherical lens surface can be made into a shape other than a spherical surface to obtain more control variables and to reduce aberrations, thereby reducing the number of lenses used, thereby effectively reducing the total length of the optical lens assembly of the present invention.

[0240] In the optical lens set provided by the present invention, with respect to the lens having refractive power, if the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at the near optical axis; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at the near optical axis.

[0241] In the optical lens assembly provided by the present invention, the maximum effective radius of the lens surface generally refers to the radius of the effective optical area of ​​the lens surface (ie, the area of ​​the lens that has not been surface treated, ablated or applied with a light shielding layer).

[0242] In addition, the optical lens assembly provided by the present invention can be applied to electronic devices. Fig. 9 The schematic diagram of a head-mounted electronic device according to an embodiment of the present invention is shown. The head-mounted electronic device 9 is, for example but not limited to, a head-mounted display using virtual reality technology, and includes a housing 910 and an optical machine module 920, an image source 930, and a controller 940 disposed in the housing 910.

[0243] The optical module 920 corresponds to the left eye and the right eye of the user respectively. The optical module 920 includes an optical lens set, and the optical lens set can be any one of the optical lens sets in the first embodiment to the eighth embodiment.

[0244] The image source 930 may be any one of the image sources of the first embodiment to the eighth embodiment. The image source 930 may correspond to the left eye and the right eye. The type of the image source 930 is, for example but not limited to, an OLED display, an LED display, a liquid crystal display or other displays.

[0245] The controller 940 is electrically connected to the image source 930 to control the image source 930 to display images, so that the head mounted electronic device 9 can project images to the user's eyes.

[0246] Although the present invention is disclosed as above with the aforementioned embodiments, these embodiments are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the changes, modifications and combinations of various embodiments are all within the scope of patent protection of the present invention. Please refer to the attached patent application for the scope of protection defined by the present invention.

Claims

1. An optical lens assembly, characterized in that: From the eye side to the image source side, it includes: an optical group, comprising a partially reflective and partially transmissive element, and an absorbing polarizing element, a reflecting polarizing element, a phase delay element, a first lens having a refractive power, and a second lens having a refractive power, in order from the eye side to the image source side; and a third lens having refractive power; The partially reflective and partially transmissive element is disposed between the first lens and the third lens; at least one of the first lens and the second lens has a positive refractive power; when the optical lens group is zoomed from the near point to the far point, the optical group moves from the image source side to the eye side; the overall focal length of the optical lens group at the near point is f_N, and the overall focal length of the optical lens group at the far point is f_F, which satisfies the following conditions: 0.72 <f_N / f_F<1.22。 2. The optical lens assembly according to claim 1, characterized in that: The curvature radius of the eye side surface of the third lens is R5, and the curvature radius of the image source side surface of the third lens is R6, and the following conditions are met: -11.34 <R6 / R5<1.6l。 3. The optical lens assembly according to claim 1, characterized in that: The curvature radius of the image source side surface of the first lens is R2, and the curvature radius of the image source side surface of the third lens is R6, and the following conditions are met: -0.83 <R6 / R2<2.46。 4. The optical lens assembly according to claim 1, characterized in that: The maximum effective radius of the image source side surface of the first lens is CA2, and the absolute value of the displacement from the intersection of the image source side surface of the first lens on the optical axis to the maximum effective radius position of the image source side surface of the first lens parallel to the optical axis is TDP2, which satisfies the following conditions: 4.83 <CA2 / TDP2<80.97。 5. The optical lens assembly according to claim 1, characterized in that: The curvature radius of the eye side surface of the second lens is R3, the curvature radius of the eye side surface of the third lens is R5, the focal length of the second lens is f2, and the following condition is satisfied: -171.97 mm<(R3*R5) / f2<144.98 mm.

6. The optical lens assembly according to claim 1, characterized in that: The focal length of the second lens is f2, the focal length of the third lens is f3, and the following conditions are met: -10.65 <f2 / f3<7.35。 7. The optical lens assembly according to claim 1, characterized in that: The maximum effective radius of the eye side surface of the second lens is CA3, and the absolute value of the displacement from the intersection of the eye side surface of the second lens on the optical axis to the maximum effective radius position of the eye side surface of the second lens parallel to the optical axis is TDP3, and the following conditions are met: 4.06 <CA3 / TDP3<49.78。 8. The optical lens assembly according to claim 1, characterized in that: The focal length of the first lens is f1, the focal length of the second lens is f2, and the following conditions are met: -3.25 <f1 / f2<3.77。 9. The optical lens assembly according to claim 1, characterized in that: The curvature radius of the image source side surface of the first lens is R2, the thickness of the first lens on the optical axis is CT1, and the following conditions are met: -54.72 <R2 / CT1<103.11。 10. The optical lens assembly according to claim 1, characterized in that: The maximum effective radius of the eye side surface of the third lens is CA5, and the absolute value of the displacement from the intersection of the eye side surface of the third lens on the optical axis to the maximum effective radius position of the eye side surface of the third lens parallel to the optical axis is TDP5, and the following conditions are met: 2.40 <CA5 / TDP5<42.28。 11. The optical lens assembly according to claim 1, characterized in that: The curvature radius of the eye side surface of the second lens is R3, the thickness of the second lens on the optical axis is CT2, and meets the following conditions: -39.56 <R3 / CT2<65.50。 12. The optical lens assembly according to claim 1, characterized in that: The thickness of the first lens on the optical axis is CT1, the thickness of the second lens on the optical axis is CT2, and the following conditions are met: 0.18 <CT1 / CT2<3.69。 13. The optical lens assembly according to claim 1, characterized in that: The thickness of the first lens on the optical axis is CT1, the thickness of the second lens on the optical axis is CT2, the thickness of the third lens on the optical axis is CT3, and the following condition is satisfied: 0.51<(CT1+CT2) / CT3<4.

51.

14. The optical lens assembly according to claim 1, characterized in that: When the optical lens group is at a far point, the distance on the optical axis from the image source side surface of the second lens of the optical group to the eye side surface of the third lens is T23_F, and when the optical lens group is at a near point, the distance on the optical axis from the image source side surface of the second lens of the optical group to the eye side surface of the third lens is T23_N, the overall focal length of the optical lens group at the near point is f_N, and the overall focal length of the optical lens group at the far point is f_F, and the following condition is satisfied: -13.11<(T23_F-T23_N) / (f_F-f_N)<4.

28.

15. An electronic device, characterized in that: Include: a housing; The optical lens assembly according to any one of claims 1 to 14, disposed in the housing; An image source is disposed in the housing and located on the image source surface of the optical lens assembly; as well as A controller is disposed in the housing and electrically connected to the image source.

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