Optical imaging lens

Abstract

The invention discloses an optical imaging lens which sequentially comprises a first lens, a second lens and a third lens from an object side to an image side along an optical axis, and each of the first lens, the second lens and the third lens comprises an object side surface which faces the object side and enables imaging light to pass through and an image side surface which faces the image side and enables the imaging light to pass through. A circumferential area of the object side surface of the second lens is a concave surface. An optical axis area of the object side surface of the third lens is a concave surface. Wherein the optical imaging lens only comprises the three lenses.

Description

Technical Field

[0001] This invention relates to an optical element, and more particularly to an optical imaging lens primarily used for imaging near-infrared (NIR) light. Background Technology

[0002] The applications of optical imaging lenses extend far beyond capturing images and videos; they also include environmental monitoring, dashcam photography, virtual reality trackers (VR trackers), and facial recognition. Consumer electronics are rapidly evolving, with a continuous pursuit of thinner, lighter, and smaller designs. The specifications of key components like optical imaging lenses are also constantly improving to meet consumer demands. In addition to image quality and size, improving the field of view of optical imaging lenses is becoming increasingly important. Furthermore, combining lenses with different aperture sizes to achieve depth-of-field or macro effects is gradually becoming a mainstream market demand. Therefore, in the field of optical imaging lens design, besides pursuing miniaturization, it is also essential to consider image quality and performance.

[0003] However, optical imaging lens design is not simply a matter of scaling down a high-quality lens to create an optical imaging lens that combines a wide field of view with miniaturization. The design process involves not only material properties but also practical production issues such as manufacturing and assembly yield. Summary of the Invention

[0004] This invention provides an optical imaging lens that is small in size, has a large field of view, and produces excellent imaging quality.

[0005] This invention provides an optical imaging lens, comprising, sequentially from the object side to the image side along an optical axis, a first lens, a second lens, and a third lens. Each of the first to third lenses includes an object-side surface facing the object side and allowing imaging light to pass through, and an image-side surface facing the image side and allowing imaging light to pass through. A circumferential region of the object-side surface of the second lens is concave. A region along the optical axis of the object-side surface of the third lens is concave. The optical imaging lens comprises only these three lenses and satisfies the following condition: 150.000 ≥ HFOV ALT / EFL ≥ 40.000 degrees and (TTL + ImgH) / (T1 + T3) ≥ 6.000, where HFOV is the half angle of view of the optical imaging lens, ALT is the sum of the thicknesses of the three lenses (first to third) on the optical axis, EFL is the effective focal length of the optical imaging lens, TTL is the distance from the object side of the first lens to an imaging plane on the optical axis, ImgH is the maximum image height of the optical imaging lens, T1 is the thickness of the first lens on the optical axis, and T3 is the thickness of the third lens on the optical axis.

[0006] The present invention further provides an optical imaging lens, comprising, sequentially from the object side to the image side along an optical axis, a first lens, a second lens, and a third lens. Each of the first to third lenses includes an object-side surface facing the object side and allowing imaging light to pass through, and an image-side surface facing the image side and allowing imaging light to pass through. A circumferential region of the image-side surface of the first lens is concave. A circumferential region of the object-side surface of the second lens is concave. A region along the optical axis of the object-side surface of the third lens is concave. The optical imaging lens comprises only these three lenses and satisfies the following condition: 75.000 ≥ HFOV ALT / EFL ≥ 40,000 degrees and 7,000 ≥ Fno (EFL+D12t31) / ALT≧3.000, where HFOV is the half angle of view of the optical imaging lens, ALT is the sum of the thicknesses of the three lenses from the first lens to the third lens on the optical axis, EFL is the effective focal length of the optical imaging lens, Fno is the aperture value of the optical imaging lens, and D12t31 is the distance on the optical axis from the image side of the first lens to the object side of the third lens.

[0007] The present invention further provides an optical imaging lens, comprising, sequentially from the object side to the image side along an optical axis, a first lens, a second lens, and a third lens. Each of the first to third lenses includes an object-side surface facing the object side and through which imaging light passes, and an image-side surface facing the image side and through which imaging light passes. A circumferential region of the image-side surface of the first lens is concave. A region along the optical axis of the object-side surface of the second lens is concave. A region along the optical axis of the object-side surface of the third lens is concave. The optical imaging lens comprises only these three lenses and satisfies the following condition: 75.000 ≥ HFOV ALT / EFL ≥ 40,000 degrees and 7,000 ≥ Fno (EFL+D12t31) / ALT≧3.000, where HFOV is the half angle of view of the optical imaging lens, ALT is the sum of the thicknesses of the three lenses from the first lens to the third lens on the optical axis, EFL is the effective focal length of the optical imaging lens, Fno is the aperture value of the optical imaging lens, and D12t31 is the distance on the optical axis from the image side of the first lens to the object side of the third lens.

[0008] Based on the above, the beneficial effects of the optical imaging lens of the embodiments of the present invention are: it can correct the distortion of the edge field of view; through the matching of lens thickness and lens focal length, it can not only effectively magnify the field of view, but also maintain the imaging quality; it can enable the lens to have a better configuration and increase the manufacturing yield. Attached Figure Description

[0009] Figure 1 This is a schematic diagram illustrating the surface structure of a lens.

[0010] Figure 2 It is a schematic diagram illustrating the concave and convex structure of a lens and the intersection of light rays.

[0011] Figure 3 This is a schematic diagram illustrating the surface structure of a lens in Example 1.

[0012] Figure 4 This is a schematic diagram illustrating the surface structure of a lens in Example 2.

[0013] Figure 5 This is a schematic diagram illustrating the surface structure of a lens in Example 3.

[0014] Figure 6 This is a schematic diagram of the optical imaging lens according to the first embodiment of the present invention.

[0015] Figures 7A to 7D This is a diagram showing the longitudinal spherical aberration and various aberrations of the optical imaging lens in the first embodiment.

[0016] Figure 8 Detailed optical data of the optical imaging lens of the first embodiment of the present invention are shown.

[0017] Figure 9 The aspherical parameters of the optical imaging lens according to the first embodiment of the present invention are shown.

[0018] Figure 10 This is a schematic diagram of an optical imaging lens according to a second embodiment of the present invention.

[0019] Figures 11A to 11D This is a diagram showing the longitudinal spherical aberration and various aberrations of the optical imaging lens in the second embodiment.

[0020] Figure 12 Detailed optical data of the optical imaging lens according to the second embodiment of the present invention are shown.

[0021] Figure 13 The aspherical parameters of the optical imaging lens according to the second embodiment of the present invention are shown.

[0022] Figure 14 This is a schematic diagram of an optical imaging lens according to a third embodiment of the present invention.

[0023] Figures 15A to 15D This is a diagram showing the longitudinal spherical aberration and various aberrations of the optical imaging lens in the third embodiment.

[0024] Figure 16 Detailed optical data of the optical imaging lens according to the third embodiment of the present invention are shown.

[0025] Figure 17 The aspherical parameters of the optical imaging lens according to the third embodiment of the present invention are shown.

[0026] Figure 18 This is a schematic diagram of an optical imaging lens according to the fourth embodiment of the present invention.

[0027] Figures 19A to 19D This is a diagram showing the longitudinal spherical aberration and various aberrations of the optical imaging lens in the fourth embodiment.

[0028] Figure 20 Detailed optical data of the optical imaging lens according to the fourth embodiment of the present invention are shown.

[0029] Figure 21 The aspherical parameters of the optical imaging lens according to the fourth embodiment of the present invention are shown.

[0030] Figure 22 This is a schematic diagram of an optical imaging lens according to the fifth embodiment of the present invention.

[0031] Figures 23A to 23D This is a diagram showing the longitudinal spherical aberration and various aberrations of the optical imaging lens in the fifth embodiment.

[0032] Figure 24 Detailed optical data of the optical imaging lens according to the fifth embodiment of the present invention are shown.

[0033] Figure 25 The aspherical parameters of the optical imaging lens according to the fifth embodiment of the present invention are shown.

[0034] Figure 26 and Figure 27 The numerical values ​​of the important parameters and their relationships of the optical imaging lenses of the first to fifth embodiments of the present invention are shown.

[0035] Explanation of reference numerals in the attached figures: 0: Aperture; 1: First lens; 2: Second lens; 3: Third lens; 8: Filter; 9: Protective glass; 10: Optical imaging lens; 15, 25, 35, 85, 95, 110, 410, 510: Side view of the object; 16, 26, 36, 86, 96, 120, 320: side view; 99: imaging plane; 100, 200, 300, 400, 500: Lenses; 130: Assembly section; 151, 161, 251, 261, 351, 361, Z1: Optical axis region; 153, 163, 253, 263, 353, 363, Z2: Circumferential region; 211, 212: Parallel rays; A1: Object side; A2: Image side; CP: Center point; CP1: First center point; CP2: Second center point; EL: Extension line; I: Optical axis; Lc: Principal ray; Lm: Peripheral ray; M, R: intersection point; OB: optical boundary; TP1: First switching point; TP2: Second switching point; Z3: Relay area. Detailed Implementation

[0036] 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.

[0037] The optical system described in this specification includes at least one lens that receives imaging rays incident on the optical system from parallel to the optical axis to within a half-angle (HFOV) relative to the optical axis. The imaging rays pass through the optical system and form an image on the imaging plane. The statement "a lens has a positive (or negative) refractive index" means that the paraxial refractive index of the lens, calculated using Gaussian optics theory, is positive (or negative). The statement "the object side (or image side) of the lens" is defined as the specific range through which the imaging rays pass on the lens surface. The imaging rays include at least two types of rays: the chief ray (Lc) and the marginal ray (Lm) (e.g., ...). Figure 1 (As shown). The object side (or image side) of the lens can be divided into different regions depending on the location, including the optical axis region, the circumferential region, or one or more relay regions in some embodiments, which will be described in detail below.

[0038] Figure 1 This is a radial sectional view of lens 100. Two reference points are defined on the surface of lens 100: a center point and a transition point. The center point of the lens surface is the intersection of this surface and the optical axis I. For example... Figure 1 As illustrated, the first center point CP1 is located on the object-side surface 110 of lens 100, and the second center point CP2 is located on the image-side surface 120 of lens 100. A transition point is a point on the lens surface whose tangent is perpendicular to the optical axis I. The optical boundary OB of the lens surface is defined as the point where the outermost radially outermost edge ray Lm passing through the lens surface intersects 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 lens 100 may have no transition points or at least one transition point. If a single lens surface has multiple transition points, these transition points are named sequentially from the first transition point in the radially outward direction. For example, the first transition point TP1 (closest to the optical axis I), the second transition point TP2 (as shown in the example), and the third transition point TP2 (as shown in the example) are named sequentially from the first transition point in the radially outward direction. Figure 4 (as shown) and the Nth conversion point (farthest from optical axis I).

[0039] When the lens surface has at least one transition point, the region from the center point to the first transition point TP1 is defined as the optical axis region, which includes the center point. The region radially outward from the transition point farthest from optical axis I (the Nth transition point) to the optical boundary OB is defined as the circumferential region. In some embodiments, a relay region may be included between the optical axis region and the circumferential region; the number of relay regions depends on the number of transition points. When the lens surface has no transition points, 0% to 50% of the distance from optical axis I to the optical boundary OB of the lens surface is defined as the optical axis region, and 50% to 100% of the distance from optical axis I to the optical boundary OB of the lens surface is defined as the circumferential region.

[0040] When a ray parallel to optical axis I passes through a region, if the ray bends towards optical axis I and the intersection point with optical axis I is located on the image side A2 of the lens, then that region is a convex surface. When a ray parallel to optical axis I passes through a region, if the extension of the ray intersects optical axis I at the object side A1 of the lens, then that region is a concave surface.

[0041] In addition, see Figure 1 The lens 100 may also 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 element (not shown) in an optical system. Imaging rays do not reach the assembly portion 130. The structure and shape of the assembly portion 130 are merely illustrative examples of the invention and are not intended to limit the scope of the invention. The assembly portion 130 of the lens discussed below may be partially or entirely omitted in the drawings.

[0042] See Figure 2 Define the region between the center point CP and the first conversion point TP1 as the optical axis region Z1. Define the region between the first conversion point TP1 and the optical boundary OB of the lens surface as the circumferential region Z2. For example... Figure 2 As shown, parallel ray 211 intersects optical axis I at the image side A2 of lens 200 after passing through optical axis region Z1. That is, the focal point of parallel ray 211 passing through optical axis region Z1 is located at point R on the image side A2 of lens 200. Since the ray intersects optical axis I at the image side A2 of lens 200, optical axis region Z1 is convex. Conversely, parallel ray 212 diverges after passing through circular region Z2. Figure 2 As shown, the extension EL of parallel ray 212 after passing through the circular region Z2 intersects the optical axis I on the object side A1 of lens 200. That is, the focal point of parallel ray 212 after passing through the circular region Z2 is located at point M on the object side A1 of lens 200. Since the extension EL of the ray intersects the optical axis I on the object side A1 of lens 200, the circular region Z2 is concave. Figure 2 In the lens 200 shown, the first conversion point TP1 is the boundary between the optical axis region and the circumferential region, that is, the first conversion point TP1 is the boundary point between the convex surface and the concave surface.

[0043] On the other hand, the convexity / concavity of the optical axis region can also be determined using the method commonly used by those knowledgeable in the field: judging the convexity / concavity of the lens's optical axis region by the sign of the paraxial radius of curvature (R-value). The R-value is commonly used in optical design software, such as Zemax or CodeV. It is also frequently found in lens data sheets within optical design software. For the object-side, a positive R-value indicates a convex optical axis region, while a negative R-value indicates a concave optical axis region. Conversely, for the image-side, a positive R-value indicates a concave optical axis region, while a negative R-value indicates a convex optical axis region. This method yields results consistent with the aforementioned method using the intersection of a ray / ray extension with the optical axis, where the focal point of a ray parallel to the optical axis is located on either the object-side or image-side of the lens to determine the convexity / concavity. The terms "a region is convex (or concave)," "a region is convex (or concave)," or "a convex (or concave) region" used in this specification may be used interchangeably.

[0044] Figures 3 to 5 Examples of determining the surface shape and boundaries of the lens region in various situations are provided, including the aforementioned optical axis region, circumferential region, and relay region.

[0045] Figure 3 This is a radial sectional view of lens 300. See also... Figure 3 The image-side surface 320 of lens 300 has only one transition point TP1 within the optical boundary OB. The optical axis region Z1 and circumferential region Z2 of the image-side surface 320 of lens 300 are as follows... Figure 3 As shown. The R value of the side surface 320 of this image is positive (i.e., R>0), therefore, the optical axis region Z1 is concave.

[0046] Generally, the surface shape of each region bounded by a transition point will be opposite to that of its adjacent regions. Therefore, the transition point can be used to define the change in surface shape, i.e., from the transition point, a surface changes from concave to convex or from convex to concave. Figure 3 In the middle, since the optical axis region Z1 is concave and its shape changes at the transition point TP1, the circumferential region Z2 is convex.

[0047] Figure 4 This is a radial sectional view of lens 400. See also... Figure 4 The object-side surface 410 of lens 400 has a first conversion point TP1 and a second conversion point TP2. The area between the optical axis I and the first conversion point TP1 is defined as the optical axis region Z1 of the object-side surface 410. The R value of this object-side surface 410 is positive (i.e., R>0), therefore, the optical axis region Z1 is convex.

[0048] The area between the second conversion point TP2 and the optical boundary OB of the object-side surface 410 of the lens 400 is defined as a circumferential region Z2, which is also a convex surface. Furthermore, the area between the first conversion point TP1 and the second conversion point TP2 is defined as a relay region Z3, which is also a concave surface. See again. Figure 4 The object-side surface 410, radially outward from the optical axis I, sequentially includes the optical axis region Z1 between the optical axis I and the first conversion point TP1, the relay region Z3 located between the first conversion point TP1 and the second conversion point TP2, and the circumferential region Z2 between the second conversion point TP2 and the optical boundary OB of the object-side surface 410 of the lens 400. Since the optical axis region Z1 is convex, and its surface shape changes to concave from the first conversion point TP1, the relay region Z3 is concave. Furthermore, its surface shape changes to convex again from the second conversion point TP2, so the circumferential region Z2 is convex.

[0049] Figure 5 This is a radial sectional view of lens 500. The object-side surface 510 of lens 500 has no transition point. For a lens surface without a transition point, such as the object-side surface 510 of lens 500, the region from 0% to 50% of the distance measured from the optical axis I to the optical boundary OB of the lens surface is defined as the optical axis region, and the region from 50% to 100% of the distance measured from the optical axis I to the optical boundary OB of the lens surface is defined as the circumferential region. See also Figure 5 The lens 500 shown defines the optical axis region Z1 of the object-side 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 this object-side surface 510 is positive (i.e., R>0), therefore, the optical axis region Z1 is convex. Since the object-side surface 510 of the lens 500 has no transition point, the circumferential region Z2 of the object-side surface 510 is also convex. The lens 500 may further have an assembly portion (not shown) extending radially outward from the circumferential region Z2.

[0050] Figure 6 This is a schematic diagram of the optical imaging lens according to the first embodiment of the present invention. Figures 7A to 7D This is a diagram showing the longitudinal spherical aberration and various aberrations of the optical imaging lens in the first embodiment. Please refer to [the diagram first]. Figure 6The optical imaging lens 10 of the first embodiment of the present invention includes, in sequence along an optical axis I from the object side A1 to the image side A2, a first lens 1, an aperture 0, a second lens 2, a third lens 3, a filter 8, and a protective glass 9. When light emitted from an object to be photographed enters the optical imaging lens 10 and passes through the first lens 1, aperture 0, second lens 2, third lens 3, filter 8, and protective glass 9, an image is formed on an image plane 99. It should be noted that the object side A1 is the side facing the object to be photographed, while the image side A2 is the side facing the image plane 99. In this embodiment, the filter 8 can be a filter with various suitable functions, such as a far infrared cut-off filter, which is used to prevent far infrared rays in the imaging light from being transmitted to the image plane 99 and affecting the image quality. The protective glass 9 is a transparent glass sheet.

[0051] In this embodiment, the first lens 1, the second lens 2, the third lens 3, the filter 8, and the protective glass 9 of the optical imaging lens 10 each have an object-side surface 15, 25, 35, 85, 95 facing the object side A1 and allowing imaging light to pass through, and an image-side surface 16, 26, 36, 86, 96 facing the image side A2 and allowing imaging light to pass through. In this embodiment, the aperture 0 is disposed between the first lens 1 and the second lens 2.

[0052] The first lens 1 has a positive refractive index. The optical axis region 151 of the object-side surface 15 of the first lens 1 is convex, and its circumferential region 153 is also convex. The optical axis region 161 of the image-side surface 16 of the first lens 1 is concave, and its circumferential region 163 is also concave. In this embodiment, both the object-side surface 15 and the image-side surface 16 of the first lens 1 are aspherical surfaces, but the present invention is not limited thereto.

[0053] The second lens 2 has a positive refractive index. The optical axis region 251 of the object-side surface 25 of the second lens 2 is concave, and its circumferential region 253 is also concave. The optical axis region 261 of the image-side surface 26 of the second lens 2 is convex, and its circumferential region 263 is also convex. In this embodiment, both the object-side surface 25 and the image-side surface 26 of the second lens 2 are aspherical, but the present invention is not limited thereto.

[0054] The third lens 3 has a positive refractive index. The optical axis region 351 of the object-side surface 35 of the third lens 3 is concave, and its circumferential region 353 is also concave. The optical axis region 361 of the image-side surface 36 of the third lens 3 is convex, and its circumferential region 363 is also convex. In this embodiment, both the object-side surface 35 and the image-side surface 36 of the third lens 3 are aspherical, but the present invention is not limited thereto.

[0055] In this embodiment, the optical imaging lens 10 has only the three lenses mentioned above.

[0056] Other detailed optical data of the first embodiment are as follows: Figure 8 As shown, the effective focal length (EFL) of the optical imaging lens 10 in the first embodiment is 0.660 mm, the half field of view (HFOV) is 45.163 degrees, the system length is 1.365 mm, the aperture number (F-number, Fno) is 2.200, and the image height is 0.622 mm. The system length refers to the distance along the optical axis I from the object side 15 of the first lens 1 to the imaging plane 99. The material parameters of the lens disclosed in the optical parameter table of the embodiment are in the international glass code format for nd refractive index and Vd Abbe number, so that those skilled in the art can understand the specific material implementation. The nd refractive index is the refractive index of the material at the d-helium yellow line of 587.56 nm, and the Vd Abbe number is calculated based on the refractive index of the material at the d, F, and C wavelengths of the Fraunhofer spectrum.

[0057] The focal length values ​​disclosed in the optical parameter table of the embodiments are calculated based on the refractive index of the band in which the optical system is implemented. Since the primary wavelength of the embodiments of the present invention is 940 nanometers, the focal length values ​​of the present invention are calculated based on the refractive index of the material at 940 nanometers.

[0058] Furthermore, in this embodiment, the object-side surfaces 15, 25, and 35 and the image-side surfaces 16, 26, and 36 of the first lens 1, the second lens 2, and the third lens 3 are all aspherical surfaces, among which the object-side surfaces 15, 25, and 35 and the image-side surfaces 16, 26, and 36 are general even-order aspherical surfaces. These aspherical surfaces are defined according to the following formula (1): (1) in: Y: The perpendicular distance between a point on the aspherical curve and the optical axis I; Z: Depth of the aspherical surface (the perpendicular distance between a point on the aspherical surface at a distance Y from the optical axis I and the tangent plane that is tangent to the vertex on the optical axis I of the aspherical surface). R: Radius of curvature of the lens surface near the optical axis I; K: Conic constant; a i : The i-th order aspherical coefficient.

[0059] The aspherical coefficients of the object surface 15 of the first lens 1 to the image surface 36 of the third lens 3 in formula (1) are as follows: Figure 9 As shown. Among them, Figure 9 The field number 15 indicates that it is the aspherical coefficient of the object surface 15 of the first lens 1, and so on for the other fields. In this embodiment, the second-order aspherical coefficient a2 of each aspherical surface is zero, so it is not listed. Figure 9 middle.

[0060] Furthermore, the relationships between the important parameters in the optical imaging lens 10 of the first embodiment are as follows: Figure 26 and Figure 27 As shown.

[0061] in, T1 is the thickness of the first lens 1 on the optical axis I; T2 is the thickness of the second lens 2 on the optical axis I; T3 is the thickness of the third lens 3 on the optical axis I; TF is the thickness of filter 8 on optical axis I; TCG is the thickness of the protective glass 9 along optical axis I; G12 is the air gap between the first lens 1 and the second lens 2 on the optical axis I; G23 is the air gap between the second lens 2 and the third lens 3 on the optical axis I; G3F is the air gap between the third lens 3 and the filter 8 on the optical axis I; GFCG is the air gap between filter 8 and protective glass 9 on optical axis I; GCGP is the air gap between the protective glass 9 and the imaging surface 99 on the optical axis I; AAG is the sum of the two air gaps on the optical axis I from the first lens 1 to the third lens 3, namely the sum of G12 and G23; ALT is the sum of the thicknesses of the three lenses, from the first lens 1 to the third lens 3, on the optical axis I, namely the sum of T1, T2, and T3. Tavg is the average thickness of the three lenses, from the first lens 1 to the third lens 3, on the optical axis I, namely the average of T1, T2, and T3. Tmax is the maximum value of the thickness of the three lenses from the first lens 1 to the third lens 3 on the optical axis I, namely the maximum values ​​of T1, T2, and T3. Gavg is the average value of the two air gaps on the optical axis I from the first lens 1 to the third lens 3, namely the average value of G12 and G23. Gmax is the maximum value of the two air gaps on the optical axis I between the first lens 1 and the third lens 3, namely the maximum values ​​of G12 and G23. D12t31 is the distance on the optical axis I from the image side 16 of the first lens 1 to the object side 35 of the third lens 3, which is the sum of G12, T2, and G23. D12t22 is the distance on the optical axis I from the image side surface 16 of the first lens 1 to the image side surface 26 of the second lens 2, which is the sum of G12 and T2. D11t21 is the distance on the optical axis I from the object side surface 15 of the first lens 1 to the object side surface 25 of the second lens 2, which is the sum of T1 and G12. D22t32 is the distance on optical axis I from the image side surface 26 of the second lens 2 to the image side surface 36 of the third lens 3, which is the sum of G23 and T3; D21t31 is the distance on the optical axis I from the object side surface 25 of the second lens 2 to the object side surface 35 of the third lens 3, which is the sum of T2 and G23. D11t22 is the distance on the optical axis I from the object side 15 of the first lens 1 to the image side 26 of the second lens 2, that is, the sum of T1, G12, and T2; D21t32 is the distance on the optical axis I from the object side 25 of the second lens 2 to the image side 36 of the third lens 3, that is, the sum of T2, G23, and T3; TL is the distance on optical axis I from the object side surface 15 of the first lens 1 to the image side surface 36 of the third lens 3. TTL is the distance on the optical axis I from the object surface 15 to the imaging surface 99 of the first lens 1. BFL is the distance on optical axis I from the image side surface 36 of the third lens 3 to the image plane 99, which is the sum of G3F, TF, GFCG, TCG, and GCGP. EFL is the effective focal length of the optical imaging lens 10; HFOV is half the field of view of the optical imaging lens 10; ImgH is the maximum image height of the optical imaging lens 10; Fno is the aperture value of the optical imaging lens 10.

[0062] Furthermore, redefine: f1 is the focal length of the first lens 1; f2 is the focal length of the second lens 2; f3 is the focal length of the third lens 3; n1 is the nd refractive index of the first lens 1; n2 is the nd refractive index of the second lens 2; n3 is the nd refractive index of the third lens 3; V1 is the Abbe number of the first lens 1, Vd; V2 is the Abbe number of the second lens 2, Vd; V3 is the Abbe number of the third lens 3.

[0063] See also Figures 7A to 7D , Figure 7A The diagram illustrates the longitudinal spherical aberration on the imaging plane 99 in the first embodiment when the wavelengths are 930 nm, 940 nm, and 950 nm. Figure 7B and Figure 7C The diagrams illustrate the field curvature aberrations in the sagittal and tangential directions on the imaging plane 99 in the first embodiment when the wavelengths are 930 nm, 940 nm, and 950 nm. Figure 7D The diagram illustrates the distortion aberration on the imaging plane 99 in the first embodiment when the wavelengths are 930 nm, 940 nm, and 950 nm. The longitudinal spherical aberration of this first embodiment is shown below. Figure 7A As shown, the curves for each wavelength are very close and move towards the center, indicating that off-axis rays at different heights for each wavelength are concentrated near the imaging point. The skewing of the curves for each wavelength shows that the imaging point deviation for off-axis rays at different heights is controlled within 0.007 mm. Therefore, this first embodiment does significantly improve spherical aberration for the same wavelength. In addition, the distances between the three representative wavelengths are also quite close, indicating that the imaging positions for rays of different wavelengths are quite concentrated, thus significantly improving chromatic aberration.

[0064] exist Figure 7B and Figure 7C In the two field curvature aberration diagrams, the focal length variation for the three representative wavelengths falls within ±0.020 mm across the entire field of view, indicating that the optical system of this first embodiment can effectively eliminate aberrations. Figure 7D The distortion aberration diagram shows that the distortion aberration of this embodiment is maintained within ±10%, indicating that the distortion aberration of this first embodiment meets the optical quality requirements of the optical system. Based on this, it can be seen that compared with existing optical imaging lenses, this first embodiment can still provide good optical quality even when the system length has been shortened to 1.365 mm. Therefore, this first embodiment can shorten the lens length and have good imaging quality while maintaining good optical performance.

[0065] Figure 10 This is a schematic diagram of an optical imaging lens according to a second embodiment of the present invention. Figures 11A to 11D This is a diagram showing the longitudinal spherical aberration and various aberrations of the optical imaging lens in the second embodiment. Please refer to [the diagram first]. Figure 10A second embodiment of the optical imaging lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical coefficients, and parameters between these lenses 1, 2, and 3 are more or less different. Furthermore, in this embodiment, the first lens 1 has a negative refractive index. It should be noted that, for clear visualization of the figures, Figure 10 The labels for the optical axis region and the circumferential region that are similar in shape to the first embodiment are omitted.

[0066] Detailed optical data of the optical imaging lens 10 in the second embodiment are as follows: Figure 12 As shown, the optical imaging lens 10 of the second embodiment has an effective focal length of 0.491 mm, a half angle of view of 52.143 degrees, a system length of 1.641 mm, an aperture of 1.792, and a maximum image height of 0.622 mm.

[0067] like Figure 13 As shown, Figure 13 Then, these are the aspherical coefficients of the object side 15 of the first lens 1 to the image side 36 of the third lens 3 in the above formula (1) of the second embodiment.

[0068] Furthermore, the relationships between the important parameters in the optical imaging lens 10 of the second embodiment are as follows: Figure 26 and Figure 27 As shown.

[0069] The longitudinal spherical aberration of this second embodiment is as follows: Figure 11A As shown, the imaging point deviation of off-axis rays at different heights is controlled within ±0.070 mm. Figure 11B and Figure 11C In the two field curvature aberration diagrams, the focal length variation for the three representative wavelengths falls within ±0.070 mm across the entire field of view. Figure 11D The distortion aberration diagram shows that the distortion aberration in this embodiment is maintained within the range of ±25%.

[0070] As can be seen from the above description, the half-angle of the second embodiment is larger than that of the first embodiment. Therefore, compared to the first embodiment, the second embodiment has a wider range of angles for receiving images. The aperture of the second embodiment is larger than that of the first embodiment. Therefore, compared to the first embodiment, the second embodiment has a greater amount of light intake.

[0071] Figure 14 This is a schematic diagram of an optical imaging lens according to a third embodiment of the present invention. Figures 15A to 15D This is a diagram showing the longitudinal spherical aberration and various aberrations of the optical imaging lens in the third embodiment. Please refer to [the diagram first]. Figure 14A third embodiment of the optical imaging lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical coefficients, and parameters between these lenses 1, 2, and 3 are more or less different. Furthermore, in this embodiment, the first lens 1 has a negative refractive index, the optical axis region 151 of the object side 15 of the first lens 1 is concave, and the optical axis region 161 of its image side 16 is convex; the third lens 3 has a negative refractive index. It should be noted that, for clear visualization of the figures, Figure 10 The labels for the optical axis region and the circumferential region that are similar in shape to the first embodiment are omitted.

[0072] Detailed optical data of the optical imaging lens 10 in the third embodiment are as follows: Figure 16 As shown, the effective focal length of the optical imaging lens 10 in the third embodiment is 0.597 mm, the half angle of view is 60.297 degrees, the system length is 1.404 mm, the aperture value is 2.218, and the maximum image height is 0.622 mm.

[0073] like Figure 17 As shown, Figure 17 Then, these are the aspherical coefficients of the object side 15 of the first lens 1 to the image side 36 of the third lens 3 in the above formula (1).

[0074] Furthermore, the relationships between the important parameters in the optical imaging lens 10 of the third embodiment are as follows: Figure 26 and Figure 27 As shown.

[0075] The longitudinal spherical aberration of this third embodiment is as follows: Figure 15A As shown, the imaging point deviation of off-axis rays at different heights is controlled within ±0.016 mm. Figure 15B and Figure 15C In the two field curvature aberration diagrams, the focal length variation for the three representative wavelengths falls within ±0.050 mm across the entire field of view. Figure 15D The distortion aberration diagram shows that the distortion aberration in this embodiment is maintained within the range of ±45%.

[0076] As can be seen from the above description, the half-angle of the third embodiment is larger than that of the first embodiment. Therefore, compared with the first embodiment, the third embodiment has a larger angle range for receiving images.

[0077] Figure 18 This is a schematic diagram of an optical imaging lens according to the fourth embodiment of the present invention. Figures 19A to 19D This is a diagram showing the longitudinal spherical aberration and various aberrations of the optical imaging lens in the fourth embodiment. Please refer to [the diagram first]. Figure 18A fourth embodiment of the optical imaging lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical coefficients, and parameters between these lenses 1, 2, and 3 are more or less different. Furthermore, in this embodiment, the first lens 1 has a negative refractive index. It should be noted that, for clear visualization of the figures, Figure 10 The labels for the optical axis region and the circumferential region that are similar in shape to the first embodiment are omitted.

[0078] Detailed optical data of the optical imaging lens 10 in the fourth embodiment are as follows: Figure 20 As shown, the optical imaging lens 10 of the fourth embodiment has an effective focal length of 0.335 mm, a half angle of view of 62.463 degrees, a system length of 2.060 mm, an aperture of 1.767, and a maximum image height of 0.622 mm.

[0079] like Figure 21 As shown, Figure 21 These are the aspherical coefficients of the object side 15 of the first lens 1 to the image side 36 of the third lens 3 in the above formula (1) of the fourth embodiment.

[0080] Furthermore, the relationships between the important parameters in the optical imaging lens 10 of the fourth embodiment are as follows: Figure 26 and Figure 27 As shown.

[0081] The longitudinal spherical aberration of this fourth embodiment is as follows: Figure 19A As shown, the imaging point deviation of off-axis rays at different heights is controlled within ±0.030 mm. Figure 19B and Figure 19C In the two field curvature aberration diagrams, the focal length variation for the three representative wavelengths falls within ±0.180 mm across the entire field of view. Figure 19D The distortion aberration diagram shows that the distortion aberration in this embodiment is maintained within the range of ±60%.

[0082] As can be seen from the above description, the half-angle of view in the fourth embodiment is larger than that in the first embodiment. Therefore, compared to the first embodiment, the fourth embodiment has a larger angle range for receiving images. The aperture of the fourth embodiment is larger than that of the first embodiment. Therefore, compared to the first embodiment, the fourth embodiment has a larger amount of light intake.

[0083] Figure 22 This is a schematic diagram of an optical imaging lens according to the fifth embodiment of the present invention. Figures 23A to 23D This is a diagram showing the longitudinal spherical aberration and various aberrations of the optical imaging lens in the fifth embodiment. Please refer to [the diagram first]. Figure 22This invention provides a fifth embodiment of the optical imaging lens 10, which is generally similar to the first embodiment, but differs from it as follows: the optical data, aspherical coefficients, and parameters between these lenses 1, 2, and 3 are more or less different. Furthermore, in this embodiment, the second lens 2 has a negative refractive index. It should be noted that, for clear visualization of the figures, Figure 10 The labels for the optical axis region and the circumferential region that are similar in shape to the first embodiment are omitted.

[0084] Detailed optical data of the optical imaging lens 10 in the fifth embodiment are as follows: Figure 24 As shown, the optical imaging lens 10 of the fifth embodiment has an effective focal length of 0.499 mm, a half angle of view of 36.756 degrees, a system length of 1.523 mm, an aperture of 3.054, and a maximum image height of 0.622 mm.

[0085] like Figure 25 As shown, Figure 25 Then, the aspherical coefficients of the object side 15 of the first lens 1 to the image side 36 of the third lens 3 in the above formula (1) are the aspherical coefficients.

[0086] Furthermore, the relationships between the important parameters in the optical imaging lens 10 of the fifth embodiment are as follows: Figure 26 and Figure 27 As shown.

[0087] The longitudinal spherical aberration of this fifth embodiment is as follows: Figure 23A As shown, the imaging point deviation of off-axis rays at different heights is controlled within ±0.100 mm. Figure 23B and Figure 23C In the two field curvature aberration diagrams, the focal length variation for the three representative wavelengths falls within ±0.700 mm across the entire field of view. Figure 23D The distortion aberration diagram shows that the distortion aberration in this embodiment is maintained within the range of ±80%.

[0088] As can be seen from the above description, the lens of the fifth embodiment has a smaller difference in thickness ratio, is easier to manufacture, and therefore has a higher yield.

[0089] The optical imaging lens 10 of the embodiments of the present invention can achieve the following effects and advantages: 1. When the optical imaging lens 10 of the present invention has a concave circumferential region 263 on the object-side surface 26 of the second lens 2 and a concave optical axis region 351 on the object-side surface 35 of the third lens 3, it can correct the distortion of the edge field of view. Through the combination of lens thickness and lens focal length, when the condition 150.000 ≥ HFOV is satisfied... When ALT / EFL ≥ 40,000 degrees, it not only effectively magnifies the field of view but also maintains image quality. Further satisfying the condition (TTL + ImgH) / (T1 + T3) ≥ 6,000 allows for better lens configuration and increases manufacturing yield. Specifically, the condition 150,000 ≥ HFOV... ALT / EFL ≥ 40,000 degrees, with an optimal range of 75,000 ≥ HFOV. ALT / EFL ≥ 40.000 degrees, conditional formula: (TTL + ImgH) / (T1 + T3) ≥ 6.000, with the optimal range being: 12.000 ≥ (TTL + ImgH) / (T1 + T3) ≥ 6.000.

[0090] Second, when the optical imaging lens 10 of the present invention has a concave circumferential region 253 on the object side 25 of the second lens 2 and a concave optical axis region 351 on the object side 35 of the third lens 3, it can correct the distortion of the edge field of view. When the circumferential region 163 on the image side 16 of the first lens 1 is concave, it is beneficial to correct the field curvature of the inner field of view. Through the matching of lens thickness and lens focal length, when the condition: 75.000 ≥ HFOV is satisfied... When ALT / EFL ≥ 40.000 degrees, aberrations in the 99-center field of view of the imaging plane can be corrected while maintaining a large field of view, thus further improving image quality. This is further achieved by satisfying the condition: 7.000 ≥ Fno. When (EFL+D12t31) / ALT≧3.000, the lens can be better configured, increasing the manufacturing yield.

[0091] Third, when the optical imaging lens 10 of the present invention has a concave optical axis region 251 on the object side 25 of the second lens 2 and a concave optical axis region 351 on the object side 35 of the third lens 3, it can correct the distortion of the edge field of view. When the circumferential region 163 on the image side 16 of the first lens 1 is concave, it is beneficial to correct the field curvature of the inner field of view. Through the matching of lens thickness and lens focal length, when the condition: 75.000 ≥ HFOV is satisfied... When ALT / EFL ≥ 40,000 degrees, aberrations in the center field of view of the imaging plane can be corrected while maintaining a large field of view, thus further improving image quality. This is further achieved by satisfying the condition: 7,000 ≥ Fno. (EFL+D12t31) / ALT≧3.000 allows for better lens configuration and increases manufacturing yield.

[0092] IV. In order to shorten the length of the lens system while increasing the half angle of view, the air gap between the lenses is reduced or the lens thickness is appropriately shortened. If the numerical limit of the following condition is met, the embodiments of the present invention can have better configuration and optical quality.

[0093] in, HFOV BFL / TTL ≥ 13,000 degrees, with an optimal range of 25,000 ≥ HFOV. BFL / TTL≧13.000 degrees; HFOV Tavg / AAG ≥ 15,000 degrees, with an optimal range of 33,500 ≥ HFOV. Tavg / AAG≧15.000 degrees; HFOV Gavg / EFL ≥ 10,000 degrees, with an optimal range of 76,000 ≥ HFOV. Gavg / EFL ≥ 10,000 degrees.

[0094] V. In order to increase the system focal length and ensure image quality, while taking into account the ease of manufacturing, the air gap between the lenses is reduced or the lens thickness is appropriately shortened. If the numerical limits of the following conditional formula are met, the embodiments of the present invention can have a better configuration.

[0095] in, Fno D11t21 / D22t32≦3.000, with a preferred range of 2.000≦Fno. D11t21 / D22t32≦3.000; (T1+D21t31) / Tavg≧2.950, with a preferred range of 4.000≧(T1+D21T31) / Tavg≧2.950; Fno ALT / D12t22≦4.200, with a preferred range of 1.700≦Fno. ALT / D12t22≦4.200; (ALT+D12t31) / AAG≦4.000, with a preferred range of 2.400≦(ALT+D12t31) / AAG≦4.000; Fno EFL / (T1+T3) ≥ 1.300, with an optimal range of 7.700 ≥ Fno. EFL / (T1+T3)≧1.300; TTL / ImgH ≥ 2.000, with a preferred range of 3.500 ≥ TTL / ImgH ≥ 2.000; Fno TTL / Tmax ≥ 9.300, with an optimal range of 25.000 ≥ Fno. TTL / Tmax ≥ 9.300; (EFL+AAG) / (T1+T3)≧2.200, with a preferred range of 6.100≧(EFL+AAG) / (T1+T3)≧2.200; (AAG+TTL) / D11t22≧2.600, with a preferred range of 3.500≧(AAG+TTL) / D11t22≧2.600; (TL+AAG) / EFL≧1.800, with a preferred range of 7.250≧(TL+AAG) / EFL≧1.800; (BFL+EFL) / D21t32≦2.100, with a preferred range of 0.800≦(BFL+EFL) / D21t32≦2.100; (ImgH+D11t21) / Gavg≦6.500, with a preferred range of 3.000≦(ImgH+D11t21) / Gavg≦6.500; (ALT+Gmax) / AAG≦2.550, with the optimal range being 1.400≦(ALT+Gmax) / AAG≦2.550; (EFL+D22t32) / (Tavg+D11t21)≦2.100, with a preferred range of 0.950≦(EFL+D22t32) / (Tavg+D11t21)≦2.100; TL / Tmax ≥ 3.300, with a preferred range of 5.000 ≥ TL / Tmax ≥ 3.300; (BFL+D11t21) / Tmax≧3.000, with the preferred range being 4.900≧(BFL+D11t21) / Tmax≧3.000; (ALT+Tavg) / D22t32≦3.100, with the preferred range being 1.700≦(ALT+Tavg) / D22t32≦3.100.

[0096] In addition, any combination of parameters in the alternative embodiments can be selected to increase lens constraints, thereby facilitating lens design with the same architecture as the present invention.

[0097] 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, have a small aperture value, increase the image height, improve the image quality, or improve the assembly yield and thus improve the shortcomings of the prior art. Furthermore, the use of plastic material for the lens in the embodiments of the present invention can further reduce the weight of the lens and save costs.

[0098] The numerical ranges, including the maximum and minimum values, obtained from the combined proportional relationships of the optical parameters disclosed in the various embodiments of the present invention can all be implemented accordingly.

[0099] The embodiments of this invention disclose optical parameters including, but not limited to, focal length, lens thickness, and Abbe number (Vd). For example, the present invention discloses an optical parameter A and an optical parameter B in various embodiments. The specific explanations of the ranges covered by these optical parameters, the comparative relationships between the optical parameters, and the conditional ranges covered by the multiple embodiments are as follows: (1) The range covered by the optical parameters, for example: α2≦A≦α1 or β2≦B≦β1, where α1 is the maximum value of optical parameter A in multiple embodiments, α2 is the minimum value of optical parameter A in multiple embodiments, β1 is the maximum value of optical parameter B in multiple embodiments, and β2 is the minimum value of optical parameter B in multiple embodiments.

[0100] (2) Comparison of optical parameters, for example: A is greater than B or A is less than B.

[0101] (3) The conditional range covered by multiple embodiments, specifically, the combination or proportional relationships obtained by possible calculations of a plurality of optical parameters of the same embodiment, defined as E. E may be, for example: A+B, AB, A / B, or A... B or (A) B) 1 / 2 E satisfies the condition E≦γ1 or E≧γ2 or γ2≦E≦γ1, where γ1 and γ2 are the values ​​obtained by calculation of optical parameter A and optical parameter B in the same embodiment, and γ1 is the maximum value in multiple embodiments of the present invention, and γ2 is the minimum value in multiple embodiments of the present invention.

[0102] The range covered by the aforementioned optical parameters, the comparative relationships between the optical parameters, and the maximum, minimum, and numerical ranges within these conditions are all features upon which the present invention can be implemented, and all fall within the scope disclosed in the present invention. The above are merely illustrative examples and should not be construed as limiting.

[0103] All embodiments of the present invention are feasible, and some feature combinations can be extracted from the same embodiment. Compared with the prior art, these feature combinations can achieve unexpected effects. These feature combinations include, but are not limited to, combinations of features such as surface shape, refractive index, and conditional features. The disclosure of the embodiments of the present invention is a specific example to illustrate the principles of the present invention and should not be limited to the disclosed embodiments. Furthermore, the embodiments and their accompanying drawings are only for illustrative purposes and are not limited thereto.

Claims

1. An optical imaging lens, comprising a first lens, a second lens and a third lens sequentially along an optical axis from an object side to an image side, wherein each of the first lens to the third lens includes an object side facing the object side and allowing imaging light to pass through, and an image side facing the image side and allowing imaging light to pass through. A circumferential region on the side of the object of the second lens is concave; The optical axis region on the side of the third lens is concave; The optical imaging lens consists of only the three lenses mentioned above, and satisfies the following condition: 150.000 ≥ HFOV ALT / EFL ≥ 40.000 degrees and (TTL + ImgH) / (T1 + T3) ≥ 6.000, where HFOV is the half angle of view of the optical imaging lens, ALT is the sum of the thicknesses of the three lenses from the first lens to the third lens on the optical axis, EFL is the effective focal length of the optical imaging lens, TTL is the distance from the object side of the first lens to an imaging surface on the optical axis, ImgH is the maximum image height of the optical imaging lens, T1 is the thickness of the first lens on the optical axis, and T3 is the thickness of the third lens on the optical axis.

2. The optical imaging lens as claimed in claim 1, wherein the optical imaging lens further satisfies the following condition: Fno D11t21 / D22t32≦3.000, where Fno is the aperture value of the optical imaging lens, D11t21 is the distance on the optical axis from the object side of the first lens to the object side of the second lens, and D22t32 is the distance on the optical axis from the image side of the second lens to the image side of the third lens.

3. The optical imaging lens as claimed in claim 1, wherein the optical imaging lens further satisfies the following condition: (T1+D21t31) / Tavg≧2.950, where D21t31 is the distance on the optical axis from the object side of the second lens to the object side of the third lens, and Tavg is the average value of the thicknesses of the three lenses from the first lens to the third lens on the optical axis.

4. The optical imaging lens of claim 1, wherein the optical imaging lens further satisfies the following condition: HFOV BFL / TTL≧13.000, where BFL is the distance from the image side of the third lens to the imaging surface on the optical axis.

5. The optical imaging lens as claimed in claim 1, wherein the optical imaging lens further satisfies the following condition: Fno ALT / D12t22≦4.200, where Fno is the aperture value of the optical imaging lens, and D12t22 is the distance on the optical axis from the image side of the first lens to the image side of the second lens.

6. The optical imaging lens as claimed in claim 1, wherein the optical imaging lens further satisfies the following condition: (ALT+D12t31) / AAG≦4.000, where D12t31 is the distance on the optical axis from the image side of the first lens to the object side of the third lens, and AAG is the sum of the two air gaps on the optical axis from the first lens to the third lens.

7. An optical imaging lens, comprising a first lens, a second lens and a third lens sequentially along an optical axis from an object side to an image side, wherein each of the first lens to the third lens includes an object side facing the object side and allowing imaging light to pass through, and an image side facing the image side and allowing imaging light to pass through. A circumferential region on the image side of the first lens is concave. A circumferential region on the side of the object of the second lens is concave; The optical axis region on the side of the third lens is concave; The optical imaging lens consists of only the three lenses mentioned above, and satisfies the following condition: 75.000 ≥ HFOV ALT / EFL ≥ 40,000 degrees and 7,000 ≥ Fno (EFL+D12t31) / ALT≧3.000, where HFOV is the half angle of view of the optical imaging lens, ALT is the sum of the thicknesses of the three lenses from the first lens to the third lens on the optical axis, EFL is the effective focal length of the optical imaging lens, Fno is the aperture value of the optical imaging lens, and D12t31 is the distance on the optical axis from the image side of the first lens to the object side of the third lens.

8. An optical imaging lens, comprising a first lens, a second lens and a third lens sequentially along an optical axis from an object side to an image side, wherein each of the first lens to the third lens includes an object side facing the object side and allowing imaging light to pass through, and an image side facing the image side and allowing imaging light to pass through. A circumferential region on the image side of the first lens is concave. The optical axis region on the side of the second lens is concave; The optical axis region on the side of the third lens is concave; The optical imaging lens consists of only the three lenses mentioned above, and satisfies the following condition: 75.000 ≥ HFOV ALT / EFL ≥ 40,000 degrees and 7,000 ≥ Fno (EFL+D12t31) / ALT≧3.000, where HFOV is the half angle of view of the optical imaging lens, ALT is the sum of the thicknesses of the three lenses from the first lens to the third lens on the optical axis, EFL is the effective focal length of the optical imaging lens, Fno is the aperture value of the optical imaging lens, and D12t31 is the distance on the optical axis from the image side of the first lens to the object side of the third lens.

9. The optical imaging lens as claimed in claim 7 or 8, wherein the optical imaging lens further satisfies the following condition: Fno EFL / (T1+T3)≧1.300, where T1 is the thickness of the first lens on the optical axis and T3 is the thickness of the third lens on the optical axis.

10. The optical imaging lens of claim 7 or 8, wherein the optical imaging lens further satisfies the following condition: TTL / ImgH ≥ 2.000, where TTL is the distance from the object side of the first lens to an imaging surface on the optical axis, and ImgH is the maximum image height of the optical imaging lens.

11. The optical imaging lens as claimed in claim 7 or 8, wherein the optical imaging lens further satisfies the following condition: Fno TTL / Tmax≧9.300, where TTL is the distance from the object side of the first lens to an imaging surface on the optical axis, and Tmax is the maximum value of the thickness of the three lenses from the first lens to the third lens on the optical axis.

12. The optical imaging lens as claimed in claim 7 or 8, wherein the optical imaging lens further satisfies the following condition: (EFL+AAG) / (T1+T3)≧2.200, where AAG is the sum of the two air gaps between the first lens and the third lens on the optical axis, T1 is the thickness of the first lens on the optical axis, and T3 is the thickness of the third lens on the optical axis.

13. The optical imaging lens as claimed in claim 7 or 8, wherein the optical imaging lens further satisfies the following condition: (AAG+TTL) / D11t22≧2.600, where AAG is the sum of the two air gaps between the first lens and the third lens on the optical axis, TTL is the distance from the object side of the first lens to an imaging surface on the optical axis, and D11t22 is the distance from the object side of the first lens to the image side of the second lens on the optical axis.

14. The optical imaging lens as claimed in claim 7 or 8, wherein the optical imaging lens further satisfies the following condition: (ImgH+D11t21) / Gavg≦6.500, where ImgH is the maximum image height of the optical imaging lens, D11t21 is the distance on the optical axis from the object side of the first lens to the object side of the second lens, and Gavg is the average value of the two air gaps on the optical axis from the first lens to the third lens.

15. The optical imaging lens as claimed in claim 1, 7 or 8, wherein the optical imaging lens further satisfies the following condition: (TL+AAG) / EFL≧1.800, where TL is the distance on the optical axis from the object side of the first lens to the image side of the third lens, and AAG is the sum of the two air gaps on the optical axis from the first lens to the third lens.

16. The optical imaging lens as claimed in claim 1, 7, or 8, wherein the optical imaging lens further satisfies the following condition: HFOV Tavg / AAG≧15.000, where Tavg is the average thickness of the three lenses (the first lens to the third lens) on the optical axis, and AAG is the sum of the two air gaps of the first lens to the third lens on the optical axis.

17. The optical imaging lens as claimed in claim 1, 7 or 8, wherein the optical imaging lens further satisfies the following condition: (BFL+EFL) / D21t32≦2.100, where BFL is the distance from the image-side surface of the third lens to an imaging surface on the optical axis, and D21t32 is the distance from the object-side surface of the second lens to the image-side surface of the third lens on the optical axis.

18. The optical imaging lens as claimed in claim 1, 7, or 8, wherein the optical imaging lens further satisfies the following condition: HFOV Gavg / EFL≧10.000, where Gavg is the average value of the two air gaps of the first lens to the third lens on the optical axis.

19. The optical imaging lens as claimed in claim 1, 7 or 8, wherein the optical imaging lens further satisfies the following condition: (ALT+Gmax) / AAG≦2.550, where Gmax is the maximum value of the two air gaps between the first lens and the third lens on the optical axis, and AAG is the sum of the two air gaps between the first lens and the third lens on the optical axis.

20. The optical imaging lens as claimed in claim 1, 7 or 8, wherein the optical imaging lens further satisfies the following condition: (EFL+D22t32) / (Tavg+D11t21)≦2.100, where D22t32 is the distance on the optical axis from the image-side surface of the second lens to the image-side surface of the third lens, Tavg is the average value of the thicknesses of the three lenses from the first lens to the third lens on the optical axis, and D11t21 is the distance on the optical axis from the object-side surface of the first lens to the object-side surface of the second lens.

Images