Optical imaging lens

Abstract

An optical imaging lens comprises, sequentially from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, and a fourth lens. Each of the first to fourth lenses includes an object-side surface facing the object side and through which imaging rays pass, and an image-side surface facing the image side and through which imaging rays pass. The optical axis region of the object-side surface of the first lens is convex. The second lens is a glass lens. The third lens has a negative refractive index. The optical axis region of the image-side surface of the fourth lens is convex. The optical imaging lens comprises only these four lenses and satisfies the following conditions: HFOV / TTL ≥ 15,000 degrees / mm and 0.500 ≤ |RLGmin| / TG.

Description

Optical Imaging Lens The present invention relates to an optical element, and particularly to an optical imaging lens. In recent years, optical imaging lenses have been constantly evolving. In addition to the requirements of being thin, light, short, and small, improving the imaging quality such as aberration and chromatic aberration of the lens has become increasingly important. However, the design of an optical imaging lens is not simply to scale down a lens with good imaging quality to produce an optical lens that combines imaging quality and miniaturization. The design process not only involves the lens surface shape, lens thickness, or the air gap between lenses, but also must consider practical problems in production aspects such as production and assembly yields. Especially for small-sized lenses, slight size variations will affect the imaging quality of the entire optical system. In addition, temperature differences may cause the focusing position of the optical imaging lens to shift, thereby affecting the imaging quality. In order to meet more diverse applications, the optical imaging lens needs to maintain good thermal stability when used in different temperature environments. If the lens material is glass, it is固然 helpful for improving thermal stability, but in order to meet the requirements of miniaturized lenses, the size of the glass lens cannot be too large. General glass grinding techniques often result in too large size tolerances for small-sized glass lenses, resulting in low production yields. Therefore, how to design a miniaturized lens with good thermal stability, good imaging quality, and a large field of view at the same time has become a challenge and an urgent problem to be solved. The present invention provides an optical imaging lens that can provide a smaller size within the allowable manufacturing tolerances. The optical imaging lens of the present invention also simultaneously improves the production yield, has good thermal stability, has good imaging quality, and has a large field of view. An embodiment of the present invention provides an optical imaging lens that sequentially includes a first lens, a second lens, a third lens, and a fourth lens along the optical axis from the object side to the image side. The first lens to the fourth lens each include 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. The optical axis region of the object side surface of the first lens is a convex surface. The second lens is a glass lens. The third lens has a negative refractive power. The optical axis region of the image side surface of the fourth lens is a convex surface. There are only the above four lenses in the optical imaging lens, and the following conditional expressions are satisfied: HFOV / TTL≧15.000 degrees / mm and 0.500≦︱RLGmin︱ / TG, where HFOV is the half field of view of the optical imaging lens, TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface, RLGmin is the radius of curvature of the smaller one of the absolute values of the radii of curvature of the object side surface and the image side surface of the glass lens in the optical imaging lens, and TG is the thickness of the glass lens on the optical axis. An embodiment of the present invention provides an optical imaging lens, which sequentially includes a first lens, a second lens, a third lens, and a fourth lens along the optical axis from the object side to the image side. Each of the first lens to the fourth lens 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. The optical axis region of the object side surface of the first lens is convex. The second lens is a glass lens. The circumferential region of the object side surface of the third lens is concave. The optical imaging lens only has the above four lenses and satisfies the following conditional expressions: HFOV / TTL≧15.000 degrees / mm and 0.500≦︱RLGmin︱ / TG, where HFOV is the half field of view of the optical imaging lens, TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface, RLGmin is the radius of curvature of the smaller one of the absolute values of the radii of curvature of the object side surface and the image side surface of the glass lens in the optical imaging lens, and TG is the thickness of the glass lens on the optical axis. An embodiment of the present invention provides an optical imaging lens, which sequentially includes a first lens, a second lens, a third lens, and a fourth lens along the optical axis from the object side to the image side. Each of the first lens to the fourth lens 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. The optical axis region of the object side surface of the first lens is convex, and the circumferential region of the image side surface of the first lens is concave. The second lens is a glass lens. The optical imaging lens only has the above four lenses and satisfies the following conditional expressions: HFOV / TTL≧15.000 degrees / mm and 0.500≦︱RLGmin︱ / TG, where HFOV is the half field of view of the optical imaging lens, TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface, RLGmin is the radius of curvature of the smaller one of the absolute values of the radii of curvature of the object side surface and the image side surface of the glass lens in the optical imaging lens, and TG is the thickness of the glass lens on the optical axis. Based on the above, the beneficial effects of the optical imaging lens according to the embodiment of the present invention are as follows: By satisfying the above-mentioned concave and convex surface arrangement design of the lens, the refractive index conditions, and the design that satisfies the above conditional expressions, the optical imaging lens can have a smaller size under the allowable manufacturing tolerances. The optical imaging lens also simultaneously improves the manufacturing yield, has good thermal stability, has good imaging quality, and has a large field of view angle. The terms "optical axis region", "circumferential region", "concave surface", and "convex surface" used in this specification and the patent application scope should be interpreted based on the definitions listed in this specification. The optical system of this specification includes at least one lens that receives imaging light rays parallel to the optical axis within a half-angle (HFOV) relative to the optical axis and into the incident optical system. The imaging light rays pass through the optical system and form an image on the imaging surface. When it is said that "a lens has a positive refractive power (or negative refractive power)", it means that the paraxial refractive power calculated for the lens using Gaussian optical theory is positive (or negative). When it is said that the "object side (or image side) of the lens" is defined as a specific range where the imaging light rays pass through the lens surface. The imaging light rays include at least two types of light rays: the chief ray Lc and the marginal ray Lm (as shown in Figure 1). The object side (or image side) of the lens can be divided into different regions according to different positions, including the optical axis region, the circumferential region, or one or more relay regions in some embodiments, and the descriptions of these regions will be elaborated in detail below. Figure 1 is a radial cross-sectional view of lens 100. Define two reference points on the surface of lens 100: the center point and the conversion point. The center point of the lens surface is the intersection point of the surface and the optical axis I. As illustrated in Figure 1, the first center point CP1 is located on the object side 110 of lens 100, and the second center point CP2 is located on the image side 120 of lens 100. The conversion point is a point located on the lens surface, and the tangent line at this point is perpendicular to the optical axis I. Define the optical boundary OB of the lens surface as the intersection point of the outermost marginal ray Lm passing through the lens surface radially and the lens surface. All conversion points are located between the optical axis I and the optical boundary OB of the lens surface. In addition, the lens 100 surface may not have a conversion point or may have at least one conversion point. If there are multiple conversion points on a single lens surface, these conversion points are named sequentially from the first conversion point in the radially outward direction. For example, the first conversion point TP1 (closest to the optical axis I), the second conversion point TP2 (as shown in Figure 4), and the Nth conversion point (farthest from the optical axis I). When the lens surface has at least one conversion point, define the range from the center point to the first conversion point TP1 as the optical axis region, where the optical axis region includes the center point. Define the region from the conversion point (the Nth conversion point) farthest from the optical axis I radially outward to the optical boundary OB as the circumferential region. In some embodiments, a relay region may be further included between the optical axis region and the circumferential region, and the number of relay regions depends on the number of conversion points. When the lens surface does not have a conversion point, define the range from 0% to 50% of the distance from the optical axis I to the optical boundary OB of the lens surface as the optical axis region, and the range from 50% to 100% of the distance from the optical axis I to the optical boundary OB of the lens surface as the circumferential region. When the light rays parallel to the optical axis I pass through a region, if the light rays are deflected towards the optical axis I and the intersection point with the optical axis I is on the image side A2 of the lens, then this region is a convex surface. When the light rays parallel to the optical axis I pass through a region, if the extension line of the light rays intersects the optical axis I on the object side A1 of the lens, then this region is a concave surface. In addition, referring to FIG. 1, the lens 100 may further include an assembly portion 130 that radially extends outward from the optical boundary OB. The assembly portion 130 is generally used to assemble the lens 100 to a corresponding component (not shown) of an optical system. The imaging light rays do not reach the assembly portion 130. The structure and shape of the assembly portion 130 are only examples for illustrating the present invention and do not limit the scope of the present invention. The assembly portion 130 of the lens discussed below may be partially or entirely omitted in the drawings. Referring to FIG. 2, the region between the center point CP and the first conversion point TP1 is defined as the optical axis region Z1. The region between the first conversion point TP1 and the optical boundary OB of the lens surface is defined as the circumferential region Z2. As shown in FIG. 2, the parallel light rays 211 intersect the optical axis I on the image side A2 of the lens 200 after passing through the optical axis region Z1, that is, the focal point of the parallel light rays 211 passing through the optical axis region Z1 is located at the R point on the image side A2 of the lens 200. Since the light rays intersect the optical axis I on the image side A2 of the lens 200, the optical axis region Z1 is convex. On the contrary, the parallel light rays 212 diverge after passing through the circumferential region Z2. As shown in FIG. 2, the extension line EL of the parallel light rays 212 after passing through the circumferential region Z2 intersects the optical axis I on the object side A1 of the lens 200, that is, the focal point of the parallel light rays 212 passing through the circumferential region Z2 is located at the M point on the object side A1 of the lens 200. Since the extension line EL of the light rays intersects the optical axis I on the object side A1 of the lens 200, the circumferential region Z2 is concave. In the lens 200 shown in FIG. 2, 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. On the other hand, the determination of the concavity and convexity of the surface shape of the optical axis region can also be based on the judgment method of those with ordinary knowledge in the field, that is, by the positive and negative signs of the paraxial radius of curvature (abbreviated as the R value) to determine the concavity and convexity of the surface shape of the optical axis region of the lens. The R value is commonly used in optical design software, such as Zemax or CodeV. The R value is also commonly found in the lens data sheet of optical design software. For the object side, when the R value is positive, the optical axis region of the object side is determined to be convex; when the R value is negative, the optical axis region of the object side is determined to be concave. On the contrary, for the image side, when the R value is positive, the optical axis region of the image side is determined to be concave; when the R value is negative, the optical axis region of the image side is determined to be convex. The result determined by this method is consistent with the result of the foregoing determination method by the intersection point of the light ray / extension line of the light ray and the optical axis, that is, the determination method by the intersection point of the light ray / extension line of the light ray and the optical axis is to determine the concavity and convexity of the surface shape based on the focal point of a light ray parallel to the optical axis being located on the object side or the image side of the lens. The "a region is convex (or concave)", "a region is convex (or concave)", or "a convex (or concave) region" described in this specification can be used interchangeably. FIGS. 3 to 5 provide examples for determining the surface shape of the lens region and the region boundary in various cases, including the aforementioned optical axis region, circumferential region, and relay region. FIG. 3 is a radial cross-sectional view of lens 300. Referring to FIG. 3, there is only one conversion point TP1 on the image side surface 320 of lens 300 within the optical boundary OB. The optical axis region Z1 and the circumferential region Z2 of the image side surface 320 of lens 300 are as shown in FIG. 3. The R value of this image side surface 320 is positive (i.e., R>0). Therefore, the optical axis region Z1 is concave. Generally, the surface shape of each region bounded by the conversion point will be opposite to that of the adjacent region. Therefore, the conversion point can be used to define the change in the surface shape, that is, from the concave surface to the convex surface or from the convex surface to the concave surface at the conversion point. In FIG. 3, since the optical axis region Z1 is concave and the surface shape changes at the conversion point TP1, the circumferential region Z2 is convex. FIG. 4 is a radial cross-sectional view of lens 400. Referring to FIG. 4, there is a first conversion point TP1 and a second conversion point TP2 on the object side surface 410 of lens 400. Define the region between the optical axis I and the first conversion point TP1 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. Define the region between the second conversion point TP2 and the optical boundary OB of the object side surface 410 of lens 400 as the circumferential region Z2, and this circumferential region Z2 of the object side surface 410 is also convex. In addition, define the region between the first conversion point TP1 and the second conversion point TP2 as the relay region Z3, and this relay region Z3 of the object side surface 410 is concave. Referring to FIG. 4 again, the object side surface 410 sequentially includes, from the optical axis I radially outward, 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 lens 400. Since the optical axis region Z1 is convex and the surface shape changes from the first conversion point TP1 to concave, the relay region Z3 is concave, and since the surface shape changes from the second conversion point TP2 to convex again, the circumferential region Z2 is convex. FIG. 5 is a radial cross-sectional view of lens 500. There is no conversion point on the object side surface 510 of lens 500. For a lens surface without a conversion point, such as the object side surface 510 of lens 500, define the region from 0% to 50% of the distance from the optical axis I to the optical boundary OB of the lens surface as the optical axis region, and the region from 50% to 100% of the distance from the optical axis I to the optical boundary OB of the lens surface as the circumferential region. Referring to lens 500 shown in FIG. 5, define the region from the optical axis I to 50% of the distance from the optical axis I to the optical boundary OB of the surface of lens 500 as the optical axis region Z1 of the object side surface 510. The R value of this object side surface 510 is positive (i.e., R>0). Therefore, the optical axis region Z1 is convex. Since there is no conversion point on the object side surface 510 of lens 500, the circumferential region Z2 of the object side surface 510 is also convex. Lens 500 may further have an assembly part (not shown in the figure) extending radially outward from the circumferential region Z2. FIG. 6 is a schematic diagram of an optical imaging lens according to a first embodiment of the present invention, and FIGS. 7A to 7D are longitudinal spherical aberration and various aberration diagrams of the optical imaging lens according to the first embodiment. Please first refer to FIG. 6. The optical imaging lens 10 according to the first embodiment of the present invention sequentially includes a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, and a filter F along an optical axis I of the optical imaging lens 10 from an object side A1 to an image side A2. An aperture 0 is disposed between the first lens 1 and the second lens 2. When light emitted from a subject to be photographed enters the optical imaging lens 10 and passes through the first lens 1, the aperture 0, the second lens 2, the third lens 3, the fourth lens 4, and the filter F, an image is formed on an imaging plane 99 (Image Plane). The filter F is disposed between the image side surface 42 of the fourth lens 4 and the imaging plane 99. It should be added that the object side A1 is the side facing the subject to be photographed, and the image side A2 is the side facing the imaging plane 99. In an embodiment, the filter F may be an infrared cut filter, but the present invention is not limited thereto. In this embodiment, the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, and the filter F of the optical imaging lens 10 each have an object side surface 11, 21, 31, 41, F1 facing the object side A1 and allowing imaging light to pass through, and an image side surface 12, 22, 32, 42, F2 facing the image side A2 and allowing imaging light to pass through. The first lens 1 has a negative refractive power. The material of the first lens 1 may be plastic, but the present invention is not limited thereto. The optical axis region 113 of the object side surface 11 of the first lens 1 is convex, and its circumferential region 114 is convex. The optical axis region 123 of the image side surface 12 of the first lens 1 is concave, and its circumferential region 124 is concave. In this embodiment, the object side surface 11 and the image side surface 12 of the first lens 1 are both aspheric surfaces, but the present invention is not limited thereto. The second lens 2 has a positive refractive power. The material of the second lens 2 may be glass, but the present invention is not limited thereto. The optical axis region 213 of the object side surface 21 of the second lens 2 is convex, and its circumferential region 214 is convex. The optical axis region 223 of the image side surface 22 of the second lens 2 is flat, and its circumferential region 224 is flat. In this embodiment, the object side surface 21 of the second lens 2 is a spherical surface, but the present invention is not limited thereto. The third lens 3 has a negative refractive power. The material of the third lens 3 can be plastic, but the present invention is not limited thereto. The optical axis region 313 of the object side surface 31 of the third lens 3 is convex, and its circumferential region 314 is convex. The optical axis region 323 of the image side surface 32 of the third lens 3 is concave, and its circumferential region 324 is concave. In this embodiment, both the object side surface 31 and the image side surface 32 of the third lens 3 are aspherical surfaces, but the present invention is not limited thereto. The fourth lens 4 has a positive refractive power. The material of the fourth lens 4 can be plastic, but the present invention is not limited thereto. The optical axis region 413 of the object side surface 41 of the fourth lens 4 is convex, and its circumferential region 414 is convex. The optical axis region 423 of the image side surface 42 of the fourth lens 4 is convex, and its circumferential region 424 is convex. In this embodiment, both the object side surface 41 and the image side surface 42 of the fourth lens 4 are aspherical surfaces, but the present invention is not limited thereto. In this embodiment, there are only the above four lenses in the optical imaging lens 10. Other detailed optical data of the first embodiment are shown in FIG. 8, and the effective focal length (EFL) of the optical imaging lens 10 of the first embodiment is 0.622 millimeters (mm), the half field of view (HFOV) is 50.000 degrees, the F-number (Fno) is 2.000, its system length is 1.574 millimeters, and the image height is 0.500 millimeters, where the system length refers to the distance from the object side surface 11 of the first lens 1 to the imaging surface 99 on the optical axis I. In addition, in this embodiment, the object side surfaces 11, 31, 41 and the image side surfaces 12, 32, 42 of the first lens 1, the third lens 3 and the fourth lens 4, a total of six surfaces, are all aspherical surfaces, where the object side surfaces 11, 31, 41 and the image side surfaces 12, 32, 42 are general even asphere surfaces. And these aspherical surfaces are defined by the following formula: -----------(1) Where: R: The radius of curvature of the lens surface near the optical axis I; Z: The depth of the aspherical surface (the perpendicular distance between the point on the aspherical surface at a distance Y from the optical axis I and the tangent plane tangent to the vertex on the optical axis I of the aspherical surface); Y: The distance between the point on the aspherical curve and the optical axis I; K: The conic constant; a 2i : The 2i-th order aspherical coefficient. The aspherical coefficients of each term in the formula (1) from the object side surface 11 of the first lens 1 to the image side surface 42 of the fourth lens 4 are shown in FIG. 9. Among them, the field number 11 in FIG. 9 indicates that it is the aspherical coefficient of the object side surface 11 of the first lens 1, and the other fields are类推. In this embodiment and the following embodiments, the second-order aspherical coefficient a 2 are all 0. In addition, the relationships among the important parameters in the optical imaging lens 10 of the first embodiment are shown in FIG. 46, where the unit of HFOV is degrees, Fno has no unit, and the units of the remaining parameters are millimeters. Among them, 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; f4 is the focal length of the fourth lens 4; n1 is the refractive index of the first lens 1; n2 is the refractive index of the second lens 2; n3 is the refractive index of the third lens 3; n4 is the refractive index of the fourth lens 4; V1 is the Abbe number of the first lens 1 (Abbe number), and the Abbe number can also be referred to as the dispersion coefficient; V2 is the Abbe number of the second lens 2; V3 is the Abbe number of the third lens 3; V4 is the Abbe number of the fourth lens 4; 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; T4 is the thickness of the fourth lens 4 on the optical axis I; G12 is the air gap between the first lens 1 and the second lens 2 on the optical axis I, and it is also the distance on the optical axis I from the image side surface 12 of the first lens 1 to the object side surface 21 of the second lens 2; G23 is the air gap between the second lens 2 and the third lens 3 on the optical axis I, and it is also the distance on the optical axis I from the image side surface 22 of the second lens 2 to the object side surface 31 of the third lens 3; G34 is the air gap between the third lens 3 and the fourth lens 4 on the optical axis I, and it is also the distance on the optical axis I from the image side surface 32 of the third lens 3 to the object side surface 41 of the fourth lens 4; G4F is the air gap between the fourth lens 4 and the filter F on the optical axis I, and it is also the distance on the optical axis I from the image side surface 42 of the fourth lens 4 to the object side surface F1 of the filter F; TF is the thickness of the filter F on the optical axis I; GFP is the air gap between the filter F and the imaging surface 99 on the optical axis I, and it is also the distance on the optical axis I from the image side surface F2 of the filter F to the imaging surface 99; AAG is the sum of the three air gaps between the first lens 1 and the fourth lens 4 on the optical axis I, that is, the sum of the air gaps G12, G23, and G34; ALT is the sum of the four lens thicknesses of the first lens 1 to the fourth lens 4 on the optical axis I, that is, the sum of the thicknesses T1, T2, T3, and T4; EFL is the effective focal length of the optical imaging lens 10; BFL is the distance on the optical axis I from the image side surface 42 of the fourth lens 4 to the imaging surface 99; TTL is the distance on the optical axis I from the object side surface 11 of the first lens 1 to the imaging surface 99; TL is the distance on the optical axis I from the object side surface 11 of the first lens 1 to the image side surface 42 of the fourth lens 4; HFOV is the half field of view of the optical imaging lens 10; ImgH is the image height of the optical imaging lens 10; and Fno is the aperture value of the optical imaging lens 10. In addition, define: RLGmin is the radius of curvature of the smaller one of the absolute values of the radii of curvature of the object side surface and the image side surface of the glass lens in the optical imaging lens 10.For example, if the second lens 2 is a glass lens, RLGmin is the radius of curvature of the smaller one of the absolute values of the radii of curvature of the object side surface 21 and the image side surface 22 of the second lens 2; and TG is the thickness of the glass lens on the optical axis I. For example, if the second lens 2 is a glass lens, then TG is the thickness of the second lens 2 on the optical axis I. Referring further to FIGS. 7A to 7D, the diagram of FIG. 7A illustrates the longitudinal spherical aberration of the first embodiment, and the diagrams of FIGS. 7B and 7C respectively illustrate the field curvature aberration in the sagittal direction and the field curvature aberration in the tangential direction on the imaging surface 99 when the wavelengths of the first embodiment are 470 nm, 555 nm, and 650 nm. The diagram of FIG. 7D illustrates the distortion aberration on the imaging surface 99 when the wavelengths of the first embodiment are 470 nm, 555 nm, and 650 nm. The longitudinal spherical aberration of the first embodiment is shown in FIG. 7A. The curves formed by each wavelength are all close to and approach the middle, indicating that the off-axis rays of different heights of each wavelength are all concentrated near the imaging point. From the deflection amplitude of the curves of each wavelength, it can be seen that the imaging point deviation of the off-axis rays of different heights is controlled within the range of ±14 micrometers (μm). Therefore, the first embodiment indeed significantly improves the spherical aberration of the same wavelength. In addition, the distances between the three representative wavelengths are quite close to each other, indicating that the imaging positions of the light rays of different wavelengths are quite concentrated, thus significantly improving the chromatic aberration. In the two field curvature aberration diagrams of FIGS. 7B and 7C, the change in focal length of the three representative wavelengths within the entire field of view range falls within ±45 micrometers, indicating that the optical system of the first embodiment can effectively eliminate aberration. The distortion aberration diagram of FIG. 7D shows that the distortion aberration of the first embodiment is maintained within the range of ±35%, indicating that the distortion aberration of the first embodiment meets the imaging quality requirements of the optical system. Based on this, it shows that compared with the existing optical lens, the first embodiment can still provide good imaging quality under the condition that the system length has been shortened to 1.574 millimeters. Therefore, the first embodiment can have a smaller size under the allowable manufacturing tolerance. The first embodiment also simultaneously improves the manufacturing yield, has good imaging quality, and has a large field of view angle. In addition, the first embodiment also has good thermal stability. For example, the normal temperature is set at 20 o °C, and the focal shift at this temperature is 0.0000 millimeters. In addition, the focal shift at 0 o °C is 0.0005 millimeters, and at 60 o The focal length shift at C is -0.0005 mm. FIG. 10 is a schematic diagram of an optical imaging lens according to a second embodiment of the present invention, and FIGS. 11A to 11D are longitudinal spherical aberration and various aberration diagrams of the optical imaging lens according to the second embodiment. Please first refer to FIG. 10. A second embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: The optical data, aspherical coefficients, and parameters between these lenses 1, 2, 3, and 4 are more or less different. In addition, in this embodiment, the material of the second lens 2 can be plastic. The optical axis region 223 of the image side surface 22 of the second lens 2 is convex, and its circumferential region 224 is convex. Both the object side surface 21 and the image side surface 22 of the second lens 2 are aspherical. The optical axis region 313 of the object side surface 31 of the third lens 3 is concave, and its circumferential region 314 is concave. The material of the fourth lens 4 can be glass. The optical axis region 413 of the object side surface 41 of the fourth lens 4 is flat, and its circumferential region 414 is flat. The image side surface 42 of the fourth lens 4 is spherical. It should be noted here that, in order to clearly show the drawing, the reference numerals of the optical axis region and the circumferential region similar to the surface shape of the first embodiment are omitted in FIG. 10. The detailed optical data of the optical imaging lens 10 according to the second embodiment are shown in FIG. 12. The effective focal length of the optical imaging lens 10 according to the second embodiment is 0.657 mm, the half field of view (HFOV) is 50.000 degrees, the f-number (Fno) is 2.000, the system length is 1.882 mm, and the image height is 0.452 mm. The aspherical coefficients of each item in formula (1) from the object side surface 11 of the first lens 1 to the image side surface 32 of the third lens 3 in the second embodiment are shown in FIG. 13. In addition, the relationship between the important parameters in the optical imaging lens 10 according to the second embodiment is shown in FIG. 46. The longitudinal spherical aberration of this second embodiment is shown in FIG. 11A. The imaging point deviation of off-axis rays at different heights is controlled within the range of ±7 microns. In the two field curvature aberration diagrams of FIGS. 11B and 11C, the focal length change amounts of the three representative wavelengths within the entire field of view fall within ±20 microns. And the distortion aberration diagram of FIG. 11D shows that the distortion aberration of this second embodiment is maintained within the range of ±45%. The second embodiment also has good thermal stability. For example, the normal temperature is set at 20 o C, and the focal length shift at this temperature is 0.0000 mm. In addition, at 0 o C, the focal length shift is -0.0005 mm, and at 60 oThe focal length shift at C is 0.0020 mm. From the above description, it can be known that: the longitudinal spherical aberration and field curvature aberration of the second embodiment are better than those of the first embodiment. FIG. 14 is a schematic diagram of an optical imaging lens according to a third embodiment of the present invention, and FIGS. 15A to 15D are diagrams of longitudinal spherical aberration and various aberrations of the optical imaging lens according to the third embodiment. Please refer to FIG. 14 first. A third embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: each optical data, aspherical coefficient, and parameters between these lenses 1, 2, 3, and 4 are more or less different. In addition, in this embodiment, the optical axis region 213 of the object side surface 21 of the second lens 2 is a plane, and its circumferential region 214 is a plane. The optical axis region 223 of the image side surface 22 of the second lens 2 is a convex surface, and its circumferential region 224 is a convex surface. The image side surface 22 of the second lens 2 is a spherical surface. The optical axis region 313 of the object side surface 31 of the third lens 3 is a concave surface, and its circumferential region 314 is a concave surface. The circumferential region 324 of the image side surface 32 of the third lens 3 is a convex surface. The optical axis region 413 of the object side surface 41 of the fourth lens 4 is a concave surface. It should be noted here that, in order to clearly show the drawing, the reference numerals of the optical axis region and the circumferential region similar to the surface shape of the first embodiment are omitted in FIG. 14. The detailed optical data of the optical imaging lens 10 of the third embodiment are shown in FIG. 16, and the effective focal length of the optical imaging lens 10 of the third embodiment is 0.295 mm, the half field of view (HFOV) is 50.000 degrees, the aperture value (Fno) is 2.000, the system length is 1.837 mm, and the image height is 0.494 mm. The aspherical coefficients of each item in formula (1) from the object side surface 11 of the first lens 1 to the image side surface 42 of the fourth lens 4 in the third embodiment are shown in FIG. 17. In addition, the relationship between the important parameters in the optical imaging lens 10 of the third embodiment is shown in FIG. 46. The longitudinal spherical aberration of this third embodiment is shown in FIG. 15A, and the imaging point deviation of off-axis rays at different heights is controlled within the range of ±9 microns. In the two field curvature aberration diagrams of FIGS. 15B and 15C, the focal length change amounts of the three representative wavelengths within the entire field of view range fall within ±180 microns. And the distortion aberration diagram of FIG. 15D shows that the distortion aberration of this third embodiment is maintained within the range of ±40%. The third embodiment also has good thermal stability. For example, the normal temperature is set at 20 o C, and the focal length shift at this temperature is 0.0000 mm. In addition, at 0 o C, the focal length shift is 0.0005 mm, and at 60 o The focal length shift at C is -0.0010 mm. From the above description, it can be known that the longitudinal spherical aberration of the third embodiment is better than that of the first embodiment. FIG. 18 is a schematic diagram of an optical imaging lens according to a fourth embodiment of the present invention, and FIGS. 19A to 19D are diagrams of longitudinal spherical aberration and various aberrations of the optical imaging lens according to the fourth embodiment. Please first refer to FIG. 18. A fourth embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: The optical data, aspherical coefficients, and parameters between these lenses 1, 2, 3, and 4 are more or less different. In addition, in this embodiment, the optical axis region 213 of the object side surface 21 of the second lens 2 is a plane, and its circumferential region 214 is a plane. The optical axis region 223 of the image side surface 22 of the second lens 2 is a convex surface, and its circumferential region 224 is a convex surface. The image side surface 22 of the second lens 2 is a spherical surface. The optical axis region 313 of the object side surface 31 of the third lens 3 is a concave surface, and its circumferential region 314 is a concave surface. The circumferential region 324 of the image side surface 32 of the third lens 3 is a convex surface. It should be noted here that, in order to clearly show the drawing, the reference numerals of the optical axis region and the circumferential region similar to the surface shape of the first embodiment are omitted in FIG. 18. The detailed optical data of the optical imaging lens 10 according to the fourth embodiment are shown in FIG. 20, and the effective focal length of the optical imaging lens 10 according to the fourth embodiment is 0.615 mm, the half field of view (HFOV) is 45.000 degrees, the aperture value (Fno) is 1.800, the system length is 2.978 mm, and the image height is 0.504 mm. The aspherical coefficients of each item in the formula (1) from the object side surface 11 of the first lens 1 to the image side surface 42 of the fourth lens 4 in the fourth embodiment are shown in FIG. 21. In addition, the relationship between the important parameters in the optical imaging lens 10 according to the fourth embodiment is shown in FIG. 46. The longitudinal spherical aberration of this fourth embodiment is shown in FIG. 19A, and the imaging point deviation of off-axis rays at different heights is controlled within the range of ±25 μm. In the two field curvature aberration diagrams of FIGS. 19B and 19C, the focal length change amounts of the three representative wavelengths within the entire field of view range fall within ±50 μm. And the distortion aberration diagram of FIG. 19D shows that the distortion aberration of this fourth embodiment is maintained within the range of ±18%. The fourth embodiment also has good thermal stability. For example, the normal temperature is set at 20 o C, and the focal length shift at this temperature is 0.0000 mm. In addition, at 0 o C, the focal length shift is 0.0035 mm, and at 60 oThe focal length shift at C is -0.0060 mm. From the above description, it can be known that: the aperture value of the fourth embodiment is smaller than that of the first embodiment. In addition, the distortion aberration of the fourth embodiment is better than that of the first embodiment. FIG. 22 is a schematic diagram of an optical imaging lens according to a fifth embodiment of the present invention, and FIGS. 23A to 23D are longitudinal spherical aberration and various aberration diagrams of the optical imaging lens according to the fifth embodiment. Please first refer to FIG. 22. A fifth embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: each optical data, aspherical coefficient, and parameters between these lenses 1, 2, 3, and 4 are more or less different. In addition, in this embodiment, the optical axis region 213 of the object side surface 21 of the second lens 2 is a plane, and its circumferential region 214 is a plane. The optical axis region 223 of the image side surface 22 of the second lens 2 is a convex surface, and its circumferential region 224 is a convex surface. The image side surface 22 of the second lens 2 is a spherical surface. The optical axis region 313 of the object side surface 31 of the third lens 3 is a concave surface, and its circumferential region 314 is a concave surface. It should be noted here that, in order to clearly show the drawing, the labels of the optical axis region and the circumferential region similar to the surface shape of the first embodiment are omitted in FIG. 22. The detailed optical data of the optical imaging lens 10 according to the fifth embodiment is shown in FIG. 24, and the effective focal length of the optical imaging lens 10 according to the fifth embodiment is 0.511 mm, the half field of view (HFOV) is 50.000 degrees, the aperture value (Fno) is 2.000, the system length is 2.276 mm, and the image height is 0.500 mm. The aspherical coefficients of each item of the object side surface 11 of the first lens 1 to the image side surface 42 of the fourth lens 4 in the fifth embodiment are shown in FIG. 25. In addition, the relationship between the important parameters in the optical imaging lens 10 according to the fifth embodiment is shown in FIG. 46. The longitudinal spherical aberration of this fifth embodiment is shown in FIG. 23A, and the imaging point deviation of off-axis rays at different heights is controlled within the range of ±6 microns. In the two field curvature aberration diagrams of FIGS. 23B and 23C, the focal length change amounts of the three representative wavelengths within the entire field of view range fall within ±25 microns. The distortion aberration diagram of FIG. 23D shows that the distortion aberration of this fifth embodiment is maintained within the range of ±18%. The fifth embodiment also has good thermal stability. For example, the normal temperature is set at 20 o C, and the focal length shift at this temperature is 0.0000 mm. In addition, at 0 o C, the focal length shift is 0.0020 mm, and at 60 oThe focal length shift at C is -0.0045 mm. From the above description, it can be known that: the longitudinal spherical aberration, field curvature aberration and distortion aberration of the fifth embodiment are superior to those of the first embodiment. FIG. 26 is a schematic diagram of an optical imaging lens according to a sixth embodiment of the present invention, and FIGS. 27A to 27D are diagrams of longitudinal spherical aberration and various aberrations of the optical imaging lens according to the sixth embodiment. Please first refer to FIG. 26. A sixth embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: the optical data, aspherical coefficients, and parameters between these lenses 1, 2, 3, and 4 are more or less different. In addition, in this embodiment, the circumferential region 114 of the object side surface 11 of the first lens 1 is concave. The optical axis region 213 of the object side surface 21 of the second lens 2 is concave, and its circumferential region 214 is concave. The optical axis region 223 of the image side surface 22 of the second lens 2 is convex, and its circumferential region 224 is convex. The image side surface 22 of the second lens 2 is spherical. The circumferential region 314 of the object side surface 31 of the third lens 3 is concave, and the circumferential region 324 of its image side surface 32 is convex. It should be noted here that, in order to clearly show the drawing, the reference numerals of the optical axis region and the circumferential region similar to the surface shape of the first embodiment are omitted in FIG. 26. The detailed optical data of the optical imaging lens 10 according to the sixth embodiment are shown in FIG. 28, and the effective focal length of the optical imaging lens 10 according to the sixth embodiment is 0.601 mm, the half field of view (HFOV) is 50.000 degrees, the f-number (Fno) is 2.000, the system length is 1.702 mm, and the image height is 0.445 mm. The aspherical coefficients of each item in the formula (1) from the object side surface 11 of the first lens 1 to the image side surface 42 of the fourth lens 4 in the sixth embodiment are shown in FIG. 29. In addition, the relationship between the important parameters in the optical imaging lens 10 according to the sixth embodiment is shown in FIG. 47, where the unit of HFOV is degree, Fno has no unit, and the units of the remaining parameters are mm. The longitudinal spherical aberration of this sixth embodiment is shown in FIG. 27A, and the imaging point deviation of off-axis rays at different heights is controlled within the range of ±30 μm. In the two diagrams of field curvature aberration in FIGS. 27B and 27C, the focal length change amounts of the three representative wavelengths within the entire field of view fall within ±60 μm. And the diagram of distortion aberration in FIG. 27D shows that the distortion aberration of this sixth embodiment is maintained within the range of ±40%. The sixth embodiment also has good thermal stability. For example, the normal temperature is set at 20 o °C, and the focal length shift at this temperature is 0.0000 mm. In addition, at 0 oThe focal length shift at [C] is 0.0000 mm, and at 60 o The focal length shift at [C] is -0.0005 mm. From the above description, it can be known that: the thickness difference between the optical axis region and the circumferential region of the lens in the sixth embodiment is smaller than that in the first embodiment, which is easy to manufacture and thus has a higher yield rate. FIG. 30 is a schematic diagram of an optical imaging lens according to a seventh embodiment of the present invention, and FIGS. 31A to 31D are longitudinal spherical aberration and various aberration diagrams of the optical imaging lens according to the seventh embodiment. Please first refer to FIG. 30. A seventh embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: the optical data, aspherical coefficients, and parameters between these lenses 1, 2, 3, and 4 are more or less different. In addition, in this embodiment, the optical axis region 213 of the object side surface 21 of the second lens 2 is a plane, and its circumferential region 214 is a plane. The optical axis region 223 of the image side surface 22 of the second lens 2 is a convex surface, and its circumferential region 224 is a convex surface. The image side surface 22 of the second lens 2 is a spherical surface. The circumferential region 314 of the object side surface 31 of the third lens 3 is a concave surface, and the circumferential region 324 of its image side surface 32 is a convex surface. The circumferential region 414 of the object side surface 41 of the fourth lens 4 is a concave surface. It should be noted here that, in order to clearly show the drawing, the reference numerals of the optical axis region and the circumferential region similar to the surface shape of the first embodiment are omitted in FIG. 30. The detailed optical data of the optical imaging lens 10 according to the seventh embodiment are shown in FIG. 32, and the effective focal length of the optical imaging lens 10 according to the seventh embodiment is 0.481 mm, the half field of view (HFOV) is 50.000 degrees, the f-number (Fno) is 2.000, the system length is 1.599 mm, and the image height is 0.440 mm. The aspherical coefficients of each item in formula (1) from the object side surface 11 of the first lens 1 to the image side surface 42 of the fourth lens 4 in the seventh embodiment are shown in FIG. 33. In addition, the relationship between the important parameters in the optical imaging lens 10 according to the seventh embodiment is shown in FIG. 47. The longitudinal spherical aberration of this seventh embodiment is shown in FIG. 31A, and the imaging point deviation of off-axis rays at different heights is controlled within the range of ±12 μm. In the two field curvature aberration diagrams of FIGS. 31B and 31C, the focal length change amounts of the three representative wavelengths within the entire field of view range fall within ±25 μm. And the distortion aberration diagram of FIG. 31D shows that the distortion aberration of this seventh embodiment is maintained within the range of ±25%. The seventh embodiment also has good thermal stability. For example, the normal temperature is set at 20 o °C, and the focal length shift at this temperature is 0.0000 mm. In addition, at 0 o The focal length shift at C is 0.0030 mm, and at 60 o C, the focal length shift is -0.0065 mm. From the above description, it can be known that: the longitudinal spherical aberration, field curvature aberration and distortion aberration of the seventh embodiment are better than those of the first embodiment. FIG. 34 is a schematic diagram of an optical imaging lens according to an eighth embodiment of the present invention, and FIGS. 35A to 35D are diagrams of longitudinal spherical aberration and various aberrations of the optical imaging lens of the eighth embodiment. Please first refer to FIG. 34. An eighth embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: each optical data, aspherical coefficient, and parameters between these lenses 1, 2, 3, and 4 are more or less different. In addition, in this embodiment, the optical axis region 213 of the object side surface 21 of the second lens 2 is a plane, and its circumferential region 214 is a plane. The optical axis region 223 of the image side surface 22 of the second lens 2 is a convex surface, and its circumferential region 224 is a convex surface. The image side surface 22 of the second lens 2 is a spherical surface. The circumferential region 314 of the object side surface 31 of the third lens 3 is a concave surface. It should be noted here that, in order to clearly show the drawing, the reference numerals of the optical axis region and the circumferential region similar in surface shape to the first embodiment are omitted in FIG. 34. The detailed optical data of the optical imaging lens 10 of the eighth embodiment are shown in FIG. 36, and the effective focal length of the optical imaging lens 10 of the eighth embodiment is 0.473 mm, the half field of view (HFOV) is 50.000 degrees, the f-number (Fno) is 2.000, the system length is 1.673 mm, and the image height is 0.440 mm. The aspherical coefficients of each item in formula (1) from the object side surface 11 of the first lens 1 to the image side surface 42 of the fourth lens 4 of the eighth embodiment are shown in FIG. 37. In addition, the relationship between the important parameters in the optical imaging lens 10 of the eighth embodiment is shown in FIG. 47. The longitudinal spherical aberration of this eighth embodiment is shown in FIG. 35A, and the imaging point deviation of off-axis rays at different heights is controlled within the range of ±2 μm. In the two field curvature aberration diagrams of FIGS. 35B and 35C, the focal length change amounts of the three representative wavelengths within the entire field of view fall within ±18 μm. The distortion aberration diagram of FIG. 35D shows that the distortion aberration of this eighth embodiment is maintained within the range of ±25%. The eighth embodiment also has good thermal stability. For example, the normal temperature is set at 20 o C, and the focal length shift at this temperature is 0.0000 mm. In addition, at 0 o C, the focal length shift is 0.0015 mm, and at 60 o The focal length shift at C is -0.0035 mm. It can be known from the above description that the longitudinal spherical aberration, field curvature aberration, and distortion aberration of the eighth embodiment are superior to those of the first embodiment. FIG. 38 is a schematic diagram of an optical imaging lens according to a ninth embodiment of the present invention, and FIGS. 39A to 39D are diagrams of longitudinal spherical aberration and various aberrations of the optical imaging lens according to the ninth embodiment. Please first refer to FIG. 38. A ninth embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: The optical data, aspherical coefficients, and parameters between these lenses 1, 2, 3, and 4 are more or less different. In addition, in this embodiment, the optical axis region 213 of the object side surface 21 of the second lens 2 is a plane, and its circumferential region 214 is a plane. The optical axis region 223 of the image side surface 22 of the second lens 2 is a convex surface, and its circumferential region 224 is a convex surface. The image side surface 22 of the second lens 2 is a spherical surface. The optical axis region 313 of the object side surface 31 of the third lens 3 is a concave surface, and its circumferential region 314 is a concave surface. The circumferential region 324 of the image side surface 32 of the third lens 3 is a convex surface. It should be noted here that, in order to clearly show the drawing, the reference numerals of the optical axis region and the circumferential region similar to the surface shape of the first embodiment are omitted in FIG. 38. The detailed optical data of the optical imaging lens 10 of the ninth embodiment are shown in FIG. 40, and the effective focal length of the optical imaging lens 10 of the ninth embodiment is 0.557 mm, the half field of view (HFOV) is 50.000 degrees, the f-number (Fno) is 2.000, the system length is 1.702 mm, and the image height is 0.439 mm. The aspherical coefficients of each item in formula (1) from the object side surface 11 of the first lens 1 to the image side surface 42 of the fourth lens 4 of the ninth embodiment are shown in FIG. 41. In addition, the relationship between the important parameters in the optical imaging lens 10 of the ninth embodiment is shown in FIG. 47. The longitudinal spherical aberration of this ninth embodiment is shown in FIG. 39A, and the imaging point deviation of the off-axis rays at different heights is controlled within the range of ±18 μm. In the two diagrams of field curvature aberration in FIGS. 39B and 39C, the focal length change amounts of the three representative wavelengths within the entire field of view fall within ±25 μm. And the diagram of distortion aberration in FIG. 39D shows that the distortion aberration of this ninth embodiment is maintained within the range of ±35%. The ninth embodiment also has good thermal stability. For example, the normal temperature is set at 20 o C, and the focal length shift at this temperature is 0.0000 mm. In addition, at 0 o C, the focal length shift is 0.0030 mm, and at 60 o The focal length shift at C is -0.0055 mm. From the above description, it can be known that: the field curvature aberration of the ninth embodiment is better than that of the first embodiment. Figure 42 is a schematic diagram of an optical imaging lens according to a tenth embodiment of the present invention, and Figures 43A to 43D are longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the tenth embodiment. Please first refer to Figure 42. A tenth embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: each optical data, aspherical coefficient, and parameters between these lenses 1, 2, 3, and 4 are more or less different. In addition, in this embodiment, the optical axis region 223 of the image side surface 22 of the second lens 2 is convex, and its circumferential region 224 is convex. The image side surface 22 of the second lens 2 is spherical. The optical axis region 313 of the object side surface 31 of the third lens 3 is concave, and its circumferential region 314 is concave. The optical axis region 323 of the image side surface 32 of the third lens 3 is convex, and its circumferential region 324 is convex. The optical axis region 413 of the object side surface 41 of the fourth lens 4 is concave. It should be noted here that, in order to clearly show the drawing, the labels of the optical axis region and the circumferential region similar to the surface shape of the first embodiment are omitted in Figure 42. The detailed optical data of the optical imaging lens 10 of the tenth embodiment is shown in Figure 44, and the effective focal length of the optical imaging lens 10 of the tenth embodiment is 0.509 mm, the half field of view (HFOV) is 50.000 degrees, the f-number (Fno) is 2.000, the system length is 1.663 mm, and the image height is 0.414 mm. The aspherical coefficients of each item in formula (1) from the object side surface 11 of the first lens 1 to the image side surface 42 of the fourth lens 4 in the tenth embodiment are shown in Figure 45. In addition, the relationship between the important parameters in the optical imaging lens 10 of the tenth embodiment is shown in Figure 47. The longitudinal spherical aberration of this tenth embodiment is shown in Figure 43A, and the imaging point deviation of off-axis rays at different heights is controlled within the range of ±45 microns. In the two field curvature aberration diagrams of Figures 43B and 43C, the focal length change amounts of the three representative wavelengths within the entire field of view range fall within ±45 microns. And the distortion aberration diagram of Figure 43D shows that the distortion aberration of this tenth embodiment is maintained within the range of ±35%. The tenth embodiment also has good thermal stability. For example, the normal temperature is set at 20 o C, and the focal length shift at this temperature is 0.0000 mm. In addition, at 0 o C, the focal length shift is 0.0035 mm, and at 60 o The focal length shift at C is -0.0070 mm. Referring to FIGS. 46 to 49 again, FIGS. 46 to 49 are tabular diagrams of various optical parameters of the above first to tenth embodiments. In addition, when the lens material of the optical imaging lens 10 conforms to the following configuration relationship, chromatic aberration is effectively improved. In the optical imaging lens 10 of the embodiment of the present invention, the following conditional formula is satisfied: (V1 + V2 + V3) / V4 ≤ 3.000, where the preferred range is 1.700 ≤ (V1 + V2 + V3) / V4 ≤ 3.000. When the optical imaging lens 10 conforms to the following configuration relationship, the field of view angle can be enlarged, the system length can be shortened, and the aperture value can be reduced to increase the light transmission amount. In the optical imaging lens 10 of the embodiment of the present invention, the following conditional formula is further satisfied: HFOV / (TL * Fno) ≥ 15.000 degrees / mm, where the preferred range is 15.000 degrees / mm ≤ HFOV / (TL * Fno) ≤ 30.000 degrees / mm. When the optical imaging lens 10 conforms to the following configuration relationship, the image height can be increased, and the imaging quality and manufacturing yield can be improved. In the optical imaging lens 10 of the embodiment of the present invention, the following conditional formula is further satisfied: ImgH / (G12 + G23) ≥ 2.400, where the preferred range is 2.400 ≤ ImgH / (G12 + G23) ≤ 5.000. In addition, in order to shorten the system length of the optical imaging lens 10, the air gap or lens thickness between the lenses can be appropriately adjusted, but the manufacturing difficulty and imaging quality must be considered at the same time. Therefore, if the numerical limits of the following conditional formula are satisfied, the embodiments of the present invention can have a better configuration. In the optical imaging lens 10 of the embodiment of the present invention, the following conditional formula is further satisfied: ALT / (T2 + G23) ≥ 2.600, where the preferred range is 2.600 ≤ ALT / (T2 + G23) ≤ 5.000. In the optical imaging lens 10 of the embodiment of the present invention, the following conditional formula is further satisfied: BFL / (T3 + G34) ≥ 2.000, where the preferred range is 2.000 ≤ BFL / (T3 + G34) ≤ 5.500. In the optical imaging lens 10 of the embodiment of the present invention, the following conditional formula is further satisfied: TL / (EFL + AAG) ≥ 1.200, where the preferred range is 1.200 ≤ TL / (EFL + AAG) ≤ 4.000. In the optical imaging lens 10 of the embodiment of the present invention, it more conforms to the following conditional formula: (G12 + T4) / T3 ≥ 2.500, where the preferred range is 2.500 ≤ (G12 + T4) / T3 ≤ 6.000. In the optical imaging lens 10 of the embodiment of the present invention, it more conforms to the following conditional formula: (EFL + T4) / (G12 + G23) ≥ 4.900, where the preferred range is 4.900 ≤ (EFL + T4) / (G12 + G23) ≤ 10.500. In the optical imaging lens 10 of the embodiment of the present invention, it more conforms to the following conditional formula: T4 / T1 ≥ 2.000, where the preferred range is 2.000 ≤ T4 / T1 ≤ 9.000. In the optical imaging lens 10 of the embodiment of the present invention, it more conforms to the following conditional formula: (T2 + T3 + T4) / EFL ≥ 1.000, where the preferred range is 1.000 ≤ (T2 + T3 + T4) / EFL ≤ 6.000. In the optical imaging lens 10 of the embodiment of the present invention, it more conforms to the following conditional formula: BFL / AAG ≥ 2.400, where the preferred range is 2.400 ≤ BFL / AAG ≤ 7.800. In the optical imaging lens 10 of the embodiment of the present invention, it more conforms to the following conditional formula: T4 / G12 ≤ 4.500, where the preferred range is 2.200 ≤ T4 / G12 ≤ 4.500. In the optical imaging lens 10 of the embodiment of the present invention, it more conforms to the following conditional formula: TTL / (G12 + T2 + T4) ≤ 2.800, where the preferred range is 1.500 ≤ TTL / (G12 + T2 + T4) ≤ 2.800. In the optical imaging lens 10 of the embodiment of the present invention, it more conforms to the following conditional formula: (T3 + BFL) / T4 ≤ 2.300, where the preferred range is 1.000 ≤ (T3 + BFL) / T4 ≤ 2.300. In the optical imaging lens 10 of the embodiment of the present invention, it more conforms to the following conditional formula: (T2 + T4) / T3 ≥ 3.500, where the preferred range is 3.500 ≤ (T2 + T4) / T3 ≤ 6.800. In the optical imaging lens 10 of the embodiment of the present invention, it more conforms to the following conditional formula: G12 / (G23 + G34) ≥ 1.500, where the preferred range is 1.500 ≤ G12 / (G23 + G34) ≤ 9.000. In the optical imaging lens 10 of the embodiment of the present invention, it more conforms to the following conditional formula: T2 / G12 ≤ 3.100, where the preferred range is 1.500 ≤ T2 / G12 ≤ 3.100. The exemplary defining relationships listed above can also be selectively combined in unequal quantities and applied to the embodiments of the present invention, and are not limited thereto. When implementing the present invention, in addition to the foregoing relationships, other more detailed structures such as the concave and convex surface arrangements of other lenses can also be designed specifically for a single lens or generally for multiple lenses to strengthen the control of system performance and / or resolution. It should be noted that these details need to be selectively combined and applied to other embodiments of the present invention without conflict. In summary, the optical imaging lens 10 of the embodiments of the present invention can achieve the following effects and advantages: 1. The longitudinal spherical aberration, field curvature aberration, and distortion of the embodiments of the present invention all meet the usage specifications. In addition, the off-axis rays of the three representative wavelengths of red, green, and blue at different heights are all concentrated near the imaging point. From the deflection amplitude of each curve, it can be seen that the imaging point deviations of the off-axis rays at different heights are all controlled, and thus have good spherical aberration, aberration, and distortion suppression capabilities. Further referring to the imaging quality data, the distances between the three representative wavelengths of red, green, and blue are also quite close, indicating that the present invention has good concentration of light rays of different wavelengths in various states and excellent chromatic dispersion suppression capabilities. In summary, through the design and mutual cooperation of the lenses, the present invention can produce excellent imaging quality. 2. The optical imaging lens of the embodiments of the present invention satisfies the following combinations, which is beneficial to simultaneously reducing the lens volume and expanding the field of view angle: The optical axis region of the object side surface of the first lens is designed as a convex surface, and is combined with HFOV / TTL≧15.000 degrees / mm, and the preferred range is 15.000 degrees / mm≦HFOV / TTL≦35.000 degrees / mm. When the third lens is designed with a negative refractive power and the optical axis region of the image side surface of the fourth lens is designed as a convex surface, the aberration of the optical system can be effectively corrected and the distortion can be reduced. When the second lens is designed as a glass lens, the thermal stability of the optical imaging lens can be improved. In addition, when the size of the glass lens of the optical imaging lens is designed to satisfy 0.500≦︱RLGmin︱ / TG, the manufacturing yield of the micro lens can be improved, and the optical imaging lens has good imaging quality, and the preferred range is 0.500≦︱RLGmin︱ / TG≦3.500. III. The optical imaging lens according to the embodiments of the present invention satisfies the following combinations, which are beneficial to simultaneously reducing the lens volume and expanding the field of view angle: The first lens has a negative refractive power, the optical axis region of the object side surface of the first lens is convex, and is combined with HFOV / TTL≥15.000 degrees / mm, and the preferred range is 15.000 degrees / mm≤HFOV / TTL≤35.000 degrees / mm. When the third lens is designed to have a negative refractive power, the aberration of the optical system can be effectively corrected. When the second lens is designed to have a positive refractive power, or the fourth lens is designed to have a positive refractive power, the distortion can be reduced. When the second lens is designed as a glass lens, the thermal stability of the optical imaging lens can be improved. In addition, when the size of the glass lens of the optical imaging lens is designed to satisfy 0.500≤|RLGmin| / TG, the manufacturing yield of the micro lens can be improved, and the optical imaging lens has good imaging quality, and the preferred range is 0.500≤|RLGmin| / TG≤3.500. IV. The optical imaging lens according to the embodiments of the present invention satisfies the following combinations, which are beneficial to simultaneously reducing the lens volume and expanding the field of view angle: The optical axis region of the object side surface of the first lens is designed to be convex, and is combined with HFOV / TTL≥15.000 degrees / mm, and the preferred range is 15.000 degrees / mm≤HFOV / TTL≤35.000 degrees / mm. When the circumferential region of the object side surface of the third lens is designed to be concave, the marginal aberration of the optical imaging lens can be corrected. When the second lens is designed as a glass lens, the thermal stability of the optical imaging lens can be improved. When the size of the glass lens of the optical imaging lens is designed to satisfy 0.500≤|RLGmin| / TG, the manufacturing yield of the micro lens can be improved, and the optical imaging lens has good imaging quality, and the preferred range is 0.500≤|RLGmin| / TG≤3.500. Furthermore, when the first lens is designed to have a negative refractive power or the second lens is designed to have a positive refractive power, the aperture value of the optical imaging lens can be effectively reduced, and the light passing amount can be effectively increased. In addition, when the circumferential region of the object side surface of the fourth lens is designed to be concave, the aberration of the large field of view angle can be corrected. V. The optical imaging lens of the embodiments of the present invention satisfies the following combinations, which are beneficial to simultaneously reducing the lens volume and expanding the field of view angle: The optical axis region of the object side surface of the first lens is designed as a convex surface, and is combined with HFOV / TTL≥15.000 degrees / mm, where the preferred range is 15.000 degrees / mm≤HFOV / TTL≤35.000 degrees / mm. When the circumferential region of the image side surface of the first lens is designed as a concave surface, the peripheral aberration of the optical imaging lens can be corrected. When the second lens is designed as a glass lens, the thermal stability of the optical imaging lens can be improved. When the size of the glass lens of the optical imaging lens is designed to satisfy 0.500≤|RLGmin| / TG, the manufacturing yield of the micro lens can be improved, and the optical imaging lens has good imaging quality, where the preferred range is 0.500≤|RLGmin| / TG≤3.500. When the first lens is designed with a negative refractive power or the second lens is designed with a positive refractive power, the aperture value of the optical imaging lens can be effectively reduced, and the light transmission amount can be effectively increased. In addition, when the optical axis region of the image side surface of the third lens is designed as a concave surface, the incident angle of the imaging light entering the fourth lens can be corrected, thereby improving the imaging quality. VI. The optical imaging lens of the embodiments of the present invention satisfies the following combinations, which are beneficial to simultaneously improving the manufacturing yield of the micro lens and maintaining the good imaging quality of the optical imaging lens: One of the lenses from the first lens to the fourth lens is made of glass, and is combined with the glass lens satisfying 0.500≤|RLGmin| / TG, where the preferred range is 0.500≤|RLGmin| / TG≤3.500. When the optical axis region of the object side surface of the glass lens is designed as a flat surface, or the optical axis region of the image side surface of the glass lens is designed as a flat surface, the manufacturing yield of the optical imaging lens is improved. In addition, when one of the optical axis regions of the object side surface and the image side surface of the glass lens is designed as a flat surface, and the optical axis region of the other side surface is designed as a convex surface (for example, the optical axis region of the object side surface of the glass lens is a flat surface and the optical axis region of its image side surface is a convex surface, or the optical axis region of the object side surface of the glass lens is a convex surface and the optical axis region of its image side surface is a flat surface), the manufacturing yield of the optical imaging lens is effectively improved. The content disclosed in the embodiments of the present invention includes but is not limited to optical parameters such as focal length, lens thickness, Abbe number, etc. For example, the present invention discloses an optical parameter A and an optical parameter B in each embodiment, and the specific explanations of the ranges covered by these optical parameters, the comparison relationships between the optical parameters, and the conditional ranges covered by multiple embodiments are as follows: (1) The ranges covered by the optical parameters, for example: α 2 ≤A≤α 1 or β 2 ≤B≤β 1 , α 1 is the maximum value of the optical parameter A in multiple embodiments, α 2 is the minimum value of the optical parameter A in multiple embodiments, β 1 is the maximum value of the optical parameter B in multiple embodiments, β 2 is the minimum value of the optical parameter B in multiple embodiments. (2) The comparison relationship between optical parameters, for example: A is greater than B or A is less than B. (3) The conditional range covered by multiple embodiments. Specifically, the combined relationship or proportional relationship obtained by performing possible operations on multiple optical parameters of the same embodiment is defined as E. E can be, for example: A + B or A - B or A / B or A * B or (A * B) 1 / 2 and E satisfies the conditional E ≦ γ 1 or E ≧ γ 2 or γ 2 ≦ E ≦ γ 1 γ 1 and γ 2 are the values obtained by performing operations on the optical parameter A and the optical parameter B of the same embodiment, and γ 1 is the maximum value in multiple embodiments of the present invention, γ 2 is the minimum value in multiple embodiments of the present invention. The ranges covered by the above optical parameters, the comparison relationships between the optical parameters, and the maximum values, minimum values, and numerical ranges within the maximum and minimum values of these conditional expressions are all features according to which the present invention can be implemented and all fall within the scope disclosed by the present invention. The above is only an example and should not be limited thereto. The embodiments of the present invention can all be implemented, and partial feature combinations can be extracted from the same embodiment. Compared with the prior art, these feature combinations can also achieve the unexpected effects of this case. These feature combinations include, but are not limited to, the matching of features such as surface shape, refractive index, and conditional expressions. The disclosure of the implementation manners of the present invention is a specific embodiment for clarifying the principles of the present invention and should not limit the present invention to the disclosed embodiments. Further, the embodiments and their accompanying drawings are only for illustrative purposes of the present invention and are not limited by them. Although the present invention has been disclosed above by way of examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field to which the present invention pertains may make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to that defined by the appended patent application scope. 0: Aperture 1: First lens 2: Second lens 3: Third lens 4: Fourth lens 10: Optical imaging lens 11, 21, 31, 41, 110, 410, 510, F1: Object side 12, 22, 32, 42, 120, 320, F2: Image side 99: Imaging surface 100, 200, 300, 400, 500: Lenses 130: Assembly part 113, 123, 213, 223, 313, 323, 413, 423, Z1: Optical axis region 114, 124, 214, 224, 314, 324, 414, 424, Z2: Circumferential region 211, 212: Parallel rays A1: Object side A2: Image side CP: Central point CP1: First central point CP2: Second central point EL: Extension line F: Filter I: Optical axis Lm: Marginal ray Lc: Chief ray M, R: Intersection points OB: Optical boundary TP1: First conversion point TP2: Second conversion point Z3: Relay region FIG. 1 is a schematic diagram illustrating the surface shape structure of a lens. FIG. 2 is a schematic diagram illustrating the concave-convex structure of the surface of a lens and the light ray foci. FIG. 3 is a schematic diagram illustrating the surface shape structure of the lens of Example 1. FIG. 4 is a schematic diagram illustrating the surface shape structure of the lens of Example 2. FIG. 5 is a schematic diagram illustrating the surface shape structure of the lens of Example 3. FIG. 6 is a schematic diagram of the optical imaging lens of the first embodiment of the present invention. FIGS. 7A to 7D are diagrams of the longitudinal spherical aberration and various aberrations of the optical imaging lens of the first embodiment. FIG. 8 shows the detailed optical data of the optical imaging lens of the first embodiment of the present invention. FIG. 9 shows the aspheric parameters of the optical imaging lens of the first embodiment of the present invention. FIG. 10 is a schematic diagram of the optical imaging lens of the second embodiment of the present invention. FIGS. 11A to 11D are diagrams of the longitudinal spherical aberration and various aberrations of the optical imaging lens of the second embodiment. FIG. 12 shows the detailed optical data of the optical imaging lens of the second embodiment of the present invention. FIG. 13 shows the aspheric parameters of the optical imaging lens of the second embodiment of the present invention. FIG. 14 is a schematic diagram of the optical imaging lens of the third embodiment of the present invention. FIGS. 15A to 15D are diagrams of the longitudinal spherical aberration and various aberrations of the optical imaging lens of the third embodiment. FIG. 16 shows the detailed optical data of the optical imaging lens of the third embodiment of the present invention. FIG. 17 shows the aspheric parameters of the optical imaging lens of the third embodiment of the present invention. FIG. 18 is a schematic diagram of the optical imaging lens of the fourth embodiment of the present invention. FIGS. 19A to 19D are diagrams of the longitudinal spherical aberration and various aberrations of the optical imaging lens of the fourth embodiment. FIG. 20 shows the detailed optical data of the optical imaging lens of the fourth embodiment of the present invention. FIG. 21 shows the aspheric parameters of the optical imaging lens of the fourth embodiment of the present invention. FIG. 22 is a schematic diagram of the optical imaging lens of the fifth embodiment of the present invention. FIGS. 23A to 23D are diagrams of the longitudinal spherical aberration and various aberrations of the optical imaging lens of the fifth embodiment. FIG. 24 shows the detailed optical data of the optical imaging lens of the fifth embodiment of the present invention. FIG. 25 shows the aspheric parameters of the optical imaging lens of the fifth embodiment of the present invention. FIG. 26 is a schematic diagram of the optical imaging lens of the sixth embodiment of the present invention. FIGS. 27A to 27D are diagrams of the longitudinal spherical aberration and various aberrations of the optical imaging lens of the sixth embodiment. FIG. 28 shows the detailed optical data of the optical imaging lens of the sixth embodiment of the present invention. FIG. 29 shows the aspheric parameters of the optical imaging lens of the sixth embodiment of the present invention. FIG. 30 is a schematic diagram of the optical imaging lens of the seventh embodiment of the present invention. FIGS. 31A to 31D are diagrams of the longitudinal spherical aberration and various aberrations of the optical imaging lens of the seventh embodiment. FIG. 32 shows the detailed optical data of the optical imaging lens of the seventh embodiment of the present invention. FIG. 33 shows the aspheric parameters of the optical imaging lens of the seventh embodiment of the present invention. FIG. 34 is a schematic diagram of the optical imaging lens of the eighth embodiment of the present invention.Figures 35A to 35D are longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the eighth embodiment. Figure 36 shows the detailed optical data of the optical imaging lens of the eighth embodiment of the present invention. Figure 37 shows the aspherical parameters of the optical imaging lens of the eighth embodiment of the present invention. Figure 38 is a schematic diagram of the optical imaging lens of the ninth embodiment of the present invention. Figures 39A to 39D are longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the ninth embodiment. Figure 40 shows the detailed optical data of the optical imaging lens of the ninth embodiment of the present invention. Figure 41 shows the aspherical parameters of the optical imaging lens of the ninth embodiment of the present invention. Figure 42 is a schematic diagram of the optical imaging lens of the tenth embodiment of the present invention. Figures 43A to 43D are longitudinal spherical aberration and various aberration diagrams of the optical imaging lens of the tenth embodiment. Figure 44 shows the detailed optical data of the optical imaging lens of the tenth embodiment of the present invention. Figure 45 shows the aspherical parameters of the optical imaging lens of the tenth embodiment of the present invention. Figures 46 to 49 show the numerical values of the important parameters and their relational expressions of the optical imaging lenses of the first to tenth embodiments of the present invention. 0: Aperture 1: First lens 2: Second lens 3: Third lens 4: Fourth lens 10: Optical imaging lens 11, 21, 31, 41, F1: Object side 12, 22, 32, 42, F2: Image side 99: Imaging surface 113, 123, 213, 223, 313, 323, 413, 423: Optical axis region 114, 124, 214, 224, 314, 324, 414, 424: Circumferential region A1: Object side A2: Image side I: Optical axis F: Filter

Claims

1. An optical imaging lens, comprising, in sequence along an optical axis from an object side to an image side, a first lens, a second lens, a third lens, and a fourth lens, wherein each of the first to fourth 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 the imaging light passes; an optical axis region of the object-side surface of the first lens is convex; the second lens has a positive refractive index; an optical axis region of the image-side surface of the fourth lens is convex, and a circumferential region of the image-side surface of the fourth lens is convex; The optical imaging lens has only the four lenses mentioned above, and satisfies the following conditions: BFL / AAG≧2.400; ImgH / (G12+G23)≧2.400; 2.200≦T4 / G12≦4.500 and HFOV / TTL≧15.000 degrees / mm, where BFL is the distance from the image side of the fourth lens to the imaging surface on the optical axis, AAG is the sum of the three air gaps between the first lens and the fourth lens on the optical axis, ImgH is the image height of the optical imaging lens, G12 is the air gap between the first lens and the second lens on the optical axis, G23 is the air gap between the second lens and the third lens on the optical axis, T4 is the thickness of the fourth lens on the optical axis, HFOV is the half angle of view of the optical imaging lens, and TTL is the distance from the object side of the first lens to the imaging surface on the optical axis.

2. The optical imaging lens as claimed in claim 1, wherein the optical imaging lens further satisfies the following condition: (T3+BFL) / T4≦2.300, where T3 is the thickness of the third lens on the optical axis.

3. An optical imaging lens, comprising, in sequence along an optical axis from an object side to an image side, a first lens, a second lens, a third lens, and a fourth lens, wherein each of the first lens to the fourth lens 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 the imaging light passes; an optical axis region of the image-side surface of the fourth lens is convex. The optical imaging lens has only the four lenses mentioned above, and satisfies the following conditions: ImgH / (G12+G23)≧2.400; 2.200≦T4 / G12≦4.500 and HFOV / TTL≧15.000 degrees / mm, where ImgH is the image height of the optical imaging lens, G12 is the air gap between the first lens and the second lens on the optical axis, G23 is the air gap between the second lens and the third lens on the optical axis, T4 is the thickness of the fourth lens on the optical axis, HFOV is the half angle of view of the optical imaging lens, and TTL is the distance from the object side of the first lens to an imaging surface on the optical axis.

4. The optical imaging lens as claimed in claim 3, wherein the optical imaging lens further satisfies the following condition: BFL / AAG ≥ 2.400, where BFL is the distance from the image side of the fourth lens to the imaging surface on the optical axis, and AAG is the sum of the three air gaps from the first lens to the fourth lens on the optical axis.

5. The optical imaging lens as claimed in claim 3, wherein the optical imaging lens further satisfies the following condition: TTL / (G12+T2+T4)≦2.800, where T2 is the thickness of the second lens on the optical axis.

6. The optical imaging lens as claimed in claim 1 or claim 3, wherein the optical imaging lens further satisfies the following condition: (EFL+T4) / (G12+G23)≧4.900, where EFL is the effective focal length of the optical imaging lens.

7. The optical imaging lens as claimed in claim 1 or claim 3, wherein the optical imaging lens further satisfies the following condition: (G12+T4) / T3≧2.500, where T3 is the thickness of the third lens on the optical axis.

8. The optical imaging lens as claimed in claim 1 or claim 3, wherein the optical imaging lens further satisfies the following condition: (T2+T4) / T3≧3.500, where T2 is the thickness of the second lens on the optical axis and T3 is the thickness of the third lens on the optical axis.

9. The optical imaging lens as claimed in claim 1 or claim 3, wherein the optical imaging lens further satisfies the following condition: (T2+T3+T4) / EFL≧1.000, where T2 is the thickness of the second lens on the optical axis, T3 is the thickness of the third lens on the optical axis, and EFL is the effective focal length of the optical imaging lens.

10. The optical imaging lens as claimed in claim 1 or claim 3, wherein the optical imaging lens further satisfies the following condition: T4 / T1 ≥ 2.000, where T1 is the thickness of the first lens on the optical axis.

11. An optical imaging lens, comprising, in sequence along an optical axis from an object side to an image side, a first lens, a second lens, a third lens, and a fourth lens, wherein each of the first lens to the fourth lens 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 the imaging light passes; a circumferential region of the image-side surface of the first lens is concave; an optical axis region of the image-side surface of the third lens is concave; and a circumferential region of the object-side surface of the fourth lens is concave. The optical imaging lens has only the four lenses mentioned above, and satisfies the following conditions: ImgH / (G12+G23)≧2.400; HFOV / TTL≧15.000 degrees / mm; and BFL / AAG≧2.400, where ImgH is the image height of the optical imaging lens, G12 is the air gap between the first lens and the second lens on the optical axis, G23 is the air gap between the second lens and the third lens on the optical axis, HFOV is the half angle of view 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, BFL is the distance from the image side of the fourth lens to the imaging surface on the optical axis, and AAG is the sum of the three air gaps between the first lens and the fourth lens on the optical axis.

12. The optical imaging lens as claimed in claim 11, wherein the optical imaging lens further satisfies the following condition: T4 / G12≦4.500, where T4 is the thickness of the fourth lens on the optical axis.

13. The optical imaging lens as claimed in claim 1 or claim 11, wherein the optical imaging lens further satisfies the following condition: BFL / (T3+G34)≧2.000, where T3 is the thickness of the third lens on the optical axis, and G34 is the air gap between the third lens and the fourth lens on the optical axis.

14. The optical imaging lens as claimed in claim 1 or claim 11, wherein the optical imaging lens further satisfies the following condition: TL / (EFL+AAG)≧1.200, where TL is the distance on the optical axis from the object side of the first lens to the image side of the fourth lens, and EFL is the effective focal length of the optical imaging lens.

15. An optical imaging lens as claimed in claim 1, claim 3 or claim 11, wherein the second lens is a glass lens; wherein the optical imaging lens further satisfies the following condition: 0.500 ≦ |RLGmin| / TG, where RLGmin is the radius of curvature of the smaller of the absolute values ​​of the object-side and image-side radii of curvature of the glass lens of the optical imaging lens, and TG is the thickness of the glass lens on the optical axis.

16. The optical imaging lens as claimed in claim 1, claim 3 or claim 11, wherein the optical imaging lens further satisfies the following condition: ALT / (T2+G23)≧2.600, where ALT is the sum of the thicknesses of the four lenses from the first lens to the fourth lens on the optical axis, and T2 is the thickness of the second lens on the optical axis.

17. An optical imaging lens as claimed in claim 1, claim 3 or claim 11, wherein the optical imaging lens further satisfies the following condition: T2 / G12≦3.100, where T2 is the thickness of the second lens on the optical axis.

18. An optical imaging lens as claimed in claim 1, claim 3 or claim 11, wherein the optical imaging lens further satisfies the following condition: (V1+V2+V3) / V4≦3.000, where V1 is the Abbe number of the first lens, V2 is the Abbe number of the second lens, V3 is the Abbe number of the third lens, and V4 is the Abbe number of the fourth lens.

19. An optical imaging lens as claimed in claim 1, claim 3 or claim 11, wherein the optical imaging lens further satisfies the following condition: G12 / (G23+G34)≧1.500, where G34 is the air gap between the third lens and the fourth lens on the optical axis.

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