TW201133037A - Image sensing lens and image sensing module - Google Patents

Abstract

An image sensing lens is arranged such that the image surface is present at a location shifted away from a first location in an optical axis direction by a distance Pdis (where 0 < Pdis), the first location being a location at which an image formed of the object has a resolving power which is maximal at a center of the image, that 0.014 < Pdis/f < 0.035, where f is an overall focal length of the image sensing lens, that 0.18 < d/d2 < 0.30, where d is a thickness at a center of the single lens, and d2 is a length in air from a center of a first surface of the single lens to the image surface, the first surface facing the image surface, and that the concave surface and the first surface of the single lens are each an aspheric surface.

Description

[Technical Field] The present invention relates to an imaging lens and an imaging module for a digital camera or the like mounted on a portable terminal. [Prior Art] As a camera module, various compact digital cameras and digital video units with built-in solid-state imaging devices have been developed. In particular, in recent years, mobile terminals such as information portable terminals and mobile phones have been popularized, and camera modules mounted in mobile phones for mobile phones in emerging countries and camera modules mounted in cameras of mobile terminals are required to pass. Simple construction and process technology to achieve cost reduction. To meet this requirement, there is an increasing demand for an image pickup lens constructed using one lens. An image pickup lens using one lens is a technique capable of achieving a good image-capturing capability. In Patent Documents 1 and 2, a surface facing the object (subject) side and the image plane (imaging surface) side is disclosed. Both sides are convex father camera lenses. Further, Patent Document 3 discloses that a diaphragm is disposed on the object side of the lens main body in which the first surface on the object side is a concave surface, and the lens system satisfies the following condition (A). An imaging lens constructed in the manner of ~(C). (A) Y'/flg 0.6 (B) 0.9^ Dt/Dc^ 0.5 (C) 1.0 ^ Ap2/Am2^ 0.9 where 154059.doc 201133037 f 1: focal length of the lens system as a whole Y': maximum image height (image Height 1.0) D "Thickness of the thinnest part of the area of the lens containing at least one optical surface

Dc: the center thickness of the lens

Ap2 : effective radius of the second side of the image side (the maximum radius of the portion through which the effective light passes)

Am2 : The maximum radius of the second side of the image side. As a technique for achieving good image shaving using a meniscus lens, an image pickup lens disclosed in Patent Document 4 can be cited. [Prior Art Document] [Patent Literature]. [Patent Document 1] Japanese Laid-Open Patent Publication (Japanese Laid-Open Patent Publication No. (10) 7% (published on Dec. 3, 2003). [Patent Document 2] Japanese Laid-Open Publication No. Japanese Patent Publication No. Hei 6-_9 (1994)公开 专利 2003 2003 2003 2003 2003 2003 2003 2003 2003 2003 2003 2003 2003 2003 2003 2003 2003 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 2002 Published Patent Gazette No. (published on Apr. 5, 2002) [Summary of the Invention] [Problems to be Solved by the Invention] Shape, Good 154059.doc 201133037 Correcting Distortion' On the other hand, if the angle of view becomes wider, it will be generated. The resolution of the image formed by imaging the object is deteriorated, or the focal length is excessively large, and the image is darkened. The image pickup lens including the two lenses having convex shapes on both sides may be used as disclosed in Patent Documents 1 and 2. Correctly correcting the distortion, but it is necessary to have the same optical f-number as the glass material, and it is difficult to make the {image surface uniform at the level of the plastic material. Correction of the distortion of the imaging lens system composed of one lens having a convex shape on both sides becomes easy and For wide angle Although it is a basic configuration, it can be implemented in a large number of ways. However, as a wide-angle lens that requires 52 or more horizontal viewing angles, it is difficult to ensure the sagittal image surface as an image formed by imaging an object. The imaging lens disclosed in Patent Document 3 sets optimal conditions (A) to (1) with respect to a lens having a concave surface in which the first surface on the object side is concave. C), but the conditions (A) to (C) are not optimal for the wide-angle and small-sized optical system, and the optimum conditions for obtaining a good resolution of the image formed by imaging the object are obtained. The angle of view is about 30. Above, the angle of view is about 3 inches or more, and the specification value necessary for the camera module is the specification required for the image pickup lens compared with the condition for obtaining a good image pickup lens. Further, the condition (B) It is a specification relating to the concave y of the meniscus lens, but an imaging lens which does not necessarily obtain and has good resolution is satisfied. Moreover, the condition (C) is not related to the optical characteristic of the imaging lens itself. As in Patent Documents 3 and 4 disclosed in the imaging lens composed of a meniscus lens 1 'by the lens system and the imaging lenticular lens shape of a similarly configured 154059.doc

201133037 It is difficult to ensure the resolution required for the image to be formed around the object. Further, the imaging lens composed of a single meniscus lens causes a problem of large distortion. The present invention has been made in view of the above problems, and an object thereof is to provide a good periphery around an image formed by imaging an object. In order to solve the above problems, the imaging lens of the present invention is characterized in that it has an aperture stop sequentially from the object side toward the image surface side. a single lens in which the single lens is a concave-convex lens whose concave surface faces the object side, and a moving distance Pdis (in the optical axis direction from a position at which the resolution at the center of the image formed by imaging the object is maximized) Wherein the position of 〇&lt;Pdis) is set as the image plane, and satisfies the relationship of 0.014 &lt; Pdis/f &lt; 〇〇 352 and 〇〇. 3 ' 'the surface of the single lens facing the object side and the side facing the image side Both sides of the surface are aspherical. The focal length of the entire 'f-type imaging lens' d is the thickness of the center of the single lens, which is the center of the surface of the single lens from the side facing the image surface to the image surface. According to the above configuration, the image plane is arranged such that the position at which the image b is the largest in the image formed by imaging the object is moved by the distance Pdis in the optical axis direction, whereby the image periphery can be improved. In addition, when the Pdls/f is 0.014 or less, the resolution of the periphery of the image formed by imaging the object is insufficient, and it is the image of the existence of It35 or more. The resolution of the center is not sufficient. If considering 4 aspects, Pdis/f must be more than 〇〇14 and less than 〇〇35&lt;5 154059.doc 201133037. When d/d2 is below 0.18, The single lens becomes too thin, which may result in a decrease in the productivity of the image pickup lens due to the limited manufacturing process, and it is difficult to realize a wide-angle image pickup lens. When 〇3〇 or more, there is distortion and astigmatic aberration. In view of the above, the d/d2 must be more than 018 and less than 〇3〇. The camera module of the present invention is characterized by having: the imaging lens of the present invention and solid Image sensor, which will utilize According to the above configuration, an image pickup module that has a wide viewing angle, a small size, and a good resolution can be realized by the image pickup lens. [Effect of the Invention] In the imaging lens of the present invention, the aperture stop and the single lens are sequentially provided from the object side toward the image surface side, and the single lens concave surface faces the concave-convex lens on the object side, and the image formed by imaging the object is formed. The position where the resolution at the center becomes the largest position, and the position of the moving distance Pdis (where 〇&lt;Pdis) is set in the optical axis direction as the image plane, and satisfies the relationship of 〇〇14&lt;PdiS/f&lt;0.035, and 〇.18&lt;d/d2&lt;〇3〇, both of the surface facing the object side and the surface facing the image surface side of the single lens are aspherical surfaces. Here, f is the focal length of the entire imaging lens, d is the thickness of the center of the single lens, and d2 is the air-converted length of the single lens from the center of the surface on the image surface side to the image surface. Therefore, the present invention achieves the effect of obtaining a good resolution ability by the periphery of an image formed by imaging an object. [Embodiment] 154059.doc 201133037 Fig. 1 is a cross-sectional view showing the configuration of an image pickup lens 1GG according to an embodiment of the present invention. Fig. 2 is a cross-sectional view showing the configuration of an image pickup lens 2 according to another embodiment of the present invention. The bismuth system is a cross-sectional view showing the configuration of an imaging lens according to still another embodiment of the present invention. Fig. 4 is a cross-sectional view showing the configuration of an image pickup lens shed according to another embodiment of the present invention. The imaging lens 100, the imaging lens 2, the imaging lens 300, and the imaging lens 400 have the following basic configurations. In the following, for convenience of explanation, any of the imaging lens 1 〇〇, the imaging lens 2 〇〇, the imaging lens 300, and the imaging lens 4 称 will be referred to as "imaging lens 1". [Basic Configuration of Image Pickup Lens] Figs. 1 to 4 are views each showing a cross section including an γ (drawing up and down) direction and a ζ (left and right drawing) direction of the image pickup lens. The ζ direction indicates the direction from the object 3 side toward the image plane S5 side and the direction from the image plane S5 side toward the object 3 side, and the optical axis La of the photographic lens 1 extends in the z direction. The normal direction opposite to the optical axis La of the imaging lens is from an optical axis. The direction extending in a line extending in a direction including the X direction and the γ direction. The imaging lens 1 is configured by sequentially providing an aperture stop 2, a single lens L', and a cover glass cg from the object 3 side toward the image surface S5 side. Body. The aperture stop 2 is disposed around the surface (the side of the lens object) S1 of the single lens 1 facing the object 3 side. The purpose of setting the aperture stop 2 is 154059.doc 201133037. The light incident on the imaging lens 1 can be appropriately passed through the single lens L·, and the diameter of the beam on the axis of the incident light is limited. The object 3 is an object to be imaged by the image pickup lens 1, in other words, an object to be imaged by the camera. In the drawings, the illustration of the object 3 is very close to the imaging lens 1 for convenience of explanation. However, the distance between the object 3 and the imaging lens 1 is, for example, about 12 〇〇mm. The single lens L is a surface-oriented concave-convex lens that faces the object 3 side. Therefore, the surface (the lens image side surface) S2 of the single lens L facing the image surface S5 side is a convex surface and the surfaces S1 and S2 of the single lens L. The convex surface of the lens means that the spherical surface of the lens is bent outward. P is the concave surface of the stomach lens, which means that the lens is bent toward the hollow portion, that is, the lens is bent inward. The optical axis La of the imaging lens 1 is formed on a line segment connecting the center s1 of the surface S1 of the single lens L and the center S2 of the surface S2 of the single lens L, and extends substantially linearly in the z direction. The glass CG is provided between the single lens L and the image surface S5. The cover glass CG protects the image surface S5 from physical damage by covering the image surface S5, etc. The cover glass CG has a surface facing the object 3 side (object S3 and a surface (image side surface) S4 facing the image surface S5 side. The image surface S5 is perpendicular to the optical axis La of the imaging lens 1 and forms an image surface. The real image can be set on the image surface S5. Observed on the screen of the display. Also, in the camera module with the camera lens 1, the image An imaging element is disposed on s 5. The distance d is the distance from the center s 1 to the center s2, and corresponds to the thickness of the center of the lens L. 154059.doc -10- 201133037. The distance d2 is from the center 2 to the image plane The distance to S5 (air change &amp; and corresponds to the air conversion length from the center a to the image plane S5 of the surface S2 on the side toward the image surface S5 side of the single lens L. The air conversion length refers to the geometric length of the medium. The long-term yield obtained by dividing the refractive index of the medium. The distance d is the distance from the end portion of the effective aperture of the surface S1 of the lens L to the end portion e2 of the effective aperture of the surface S2 of the single lens L. The distance d' is the distance from the end ea of the effective aperture of the surface S1 of the single lens L to the end eb of the effective aperture of the surface S2 of the single lens. The distance line corresponds to the end of the effective aperture of the single lens L. The thickness of the portion. The actual image pickup lens 1 is of course three-dimensional. Therefore, the end portion U or α corresponds to the entire edge (for example, the circumference) of the effective aperture of the surface 81, or the end portion, or eb corresponds to the effective aperture of the surface S2. The entire edge (for example, the circumference). In this case, the distance d It can be interpreted as a single lens [the size of the Z direction containing at least the thinnest part of the optical surface area. The distances d, d2, and d· are the distances (sizes) in the z direction, and the unit is mm (mm) The image plane S5 is arranged such that the image forming capability at the center of the image (not shown) formed by imaging the object 3 by the imaging lens 仏 is raised, and is moved in the z direction, that is, the direction of the optical axis La. The position of the distance pdis (where 〇&lt;pdis). That is, the position Sa can be interpreted as the image height h〇 at the center of the image, the resolution of the image pickup lens 1 is higher than other image heights, and the image height h〇 The resolution of the imaging lens i is higher than that of other image plane positions. From the position Sa, z 154059.doc 11 201133037 The position of the displacement lens Pdis in the direction is 'the image plane S5 of the imaging lens 1 exists. Moreover, the above distance Pdis is the focal length f of the entire imaging lens i (details below) The value of the relationship (1) below is satisfied between the narratives. 0.014&lt;Pdis/f&lt;0.035 ... (1) The imaging lens 1 is configured such that the image plane S5 is moved from the position in the Z direction parallel to the optical axis La by a moving distance. Thereby, the center of the image formed by imaging the object 3 by the imaging lens 1 is lower than the resolution when the image surface S5 is set to the position Sa, but the image surface is formed around the image. S5 can improve the resolution as compared to the case of the position Sa. In addition, when Pdis/f is 0.014 or less, there is a problem that the resolution of the periphery of the image formed by imaging the object 3 is insufficient; in the case of 〇〇35 or more, there is a solution of the center of the image. Insufficient capacity. If you consider these aspects, Pdis/f must be greater than 〇 14 and less than 0.035 in order to reduce the resolution of the center of the image and to improve the resolution of the image. Further, the imaging lens 1 satisfies the value of the following relational expression (2) between the distance d and the distance d2. 18.18&lt;d/d2&lt;0.30 · (2) When the d/d2 is 0.18 or less, the single lens 1 may become too thin, and the imaging lens 1 may be caused by a limited manufacturing procedure. The productivity is lowered' and it is difficult to realize the wide-angle imaging lens i; in the case of 〇3〇 or more, 'there is distortion and the astigmatic aberration becomes large, so that the resolution of the image is deteriorated. If these aspects are considered, d/d2 must exceed 〇.18 and be less than 0.30. 154059.doc

S • 12· 201133037 Further, the image pickup lens 1 satisfies the value of the following relational expression (3) between the distance d of the single lens L and the distance d'. 0.5&lt;d, /d&lt;0.9 · · · (3) When d'/d is 0.5 or less, the single lens 1 may become too thin, and the imaging lens may be limited due to a limited manufacturing procedure. The productivity of the product is degraded; when it is 0.9 or more, it is difficult to correct the resolution ability of the image around it. If these aspects are considered, d, /d is preferably more than 〇5 and less than 09. Further, the thickness of the thinnest portion of the effective aperture of the single lens L of the imaging lens 1 (distance d' in FIGS. 1 to 4) is preferably more than 150 μm, whereby the single lens L does not become too thin. Therefore, it is possible to achieve excellent productivity. Further, in Fig. 1 to Fig. 4, for convenience of explanation, only the effective aperture is shown for the single lens L. However, the single lens L may have a flat surface formed on the outer periphery of the effective aperture.卩, but even in this case, the thickness of the thinnest portion of the effective aperture of the single lens L is preferably more than 150 μm. Further, the focus of the image pickup lens 1 is preferably less than 3; The focal length of the imaging lens 丨 is expressed by the value obtained by dividing the equivalent focal length of the imaging lens 1 by the incident diameter of the imaging lens 1. The imaging lens 1 can increase the received light summer by setting the focal ratio to less than 3. The chromatic aberration is well corrected, so that a higher resolution can be obtained. Moreover, the refractive index μ of the single lens L and the d-ray (wavelength: 587 6 nm) is more than 1.4, which is opposite to the d-ray. The number is preferably more than 43. The Abbe number refers to the ratio of the optical transmittance of the ratio of the refractive index to the dispersion of light, that is, the s stomach Abe number refers to the refraction of light of different wavelengths to different squares. To a certain extent, the dispersion of the high Abbe number medium with respect to the intensity of the light of different wavelengths becomes less. Thereby, the image pickup lens can have a low refractive index for the single lens 154059.doc •13-201133037 mirror L application, And the material of the optical constant of high dispersion value, so that the selection of the materials constituting the single lens L can be increased, thereby realizing the application of the manufacturing procedure which is not limited by the selection of materials and materials. The detailed description of the manufacturing procedure will be described below. Narrative. Also 'constituting a single lens L The material is preferably a thermosetting resin or a UV (Ultra Voilet) resin. The thermosetting resin has a property of changing a state from a liquid to a solid by imparting a specific amount or more of heat. The resin has a property of changing the state from a liquid to a solid by irradiation with ultraviolet rays having a specific intensity or higher. The single lens L is formed to contain a thermosetting resin or a uv curable resin in the manufacturing stage of the image sensor module. The plurality of single lenses L can be formed into a resin to produce the lens array described below, and the image pickup lens j can be reflowed. However, the single lens L can be a plastic lens or a glass lens. The lens 100, the imaging lens 200, the imaging lens 3A, and the imaging lens 400 are each configured to be the image surface S5 after moving the position from the position Sa toward the object 3, but the position may be from the position. The position after moving Pdis to the opposite side of the object 3 is set to the image plane S5. [MTF and aberration characteristics of the image pickup lens 100] Fig. 5 shows an image pickup lens. The MTF (unit: none) indicated by the axis and the focus displacement position (unit: relationship) shown on the horizontal axis. Fig. 6 shows the MTF of the imaging lens 100, the vertical axis, and the horizontal axis 154059. Doc -14· 201133037 Curve of the relationship between spatial frequency (unit: lp/mm). Fig. 7 shows the MTF indicated by the vertical axis of the imaging lens 1 and the image height indicated by the horizontal axis (unit: Fig. 8 is a graph showing the characteristics of various aberrations of the image pickup lens 100, and shows (a) astigmatic aberration and (b) _ change. Further, Fig. 5 to Fig. 7 The respective image heights shown in FIG. 9 to FIG. 11 , FIG. 13 to FIG. 15 , and FIG. 17 to FIG. 19 are expressed in absolute values, and the center of the image formed by imaging the object 3 by the imaging lens 1 is used as a reference. Like the height, but can also be expressed relative to the ratio of the maximum image height, and the absolute value and the ratio relative to the maximum image height have the following correspondence. 0.0000 mm=image height h0 (center of image) 〇, 1400 mm=image height h0.2 (equivalent to the height of 2最大% of the maximum image height) 〇_2800 mm=image height h0.4 (equivalent to the maximum image height) 40% height) 0.4200 mm=image height h0.6 (equivalent to 60% of the maximum image height) 0.5 600 mm=image height h0.8 (equivalent to 80% of the maximum image height) 0.7000 mm= Image height h 1.0 (maximum image height) Fig. 5, and Fig. 9, Fig. 13, and Fig. 17 below illustrate the case where the spatial frequency is "Nyquist frequency/4" and the image heights h0, h0.2. The characteristics of the tangential image plane (T) and the sagittal image plane (S) of each of h0.4, h0.6, h0.8, and hl. FIG. 6 and FIG. 1 , FIG. 14 , and FIG. 18 below illustrate the case where the spatial frequency is 0 to “Nyquist frequency/2”, and the image heights h0, h0.2, h0.4, and h0. 6. The characteristics of the tangential image plane (T) and the sagittal image plane (S) of each of Ρι0·8 and hl.O. 154059.doc • 15· 201133037 Figure 7 and the following Figure 11 Figure 1 5 and Figure 19 illustrate the spatial frequency of "Nyquist frequency / 4" and "Nyquist frequency / 2" And the characteristics of the tangential image plane and the sagittal image plane related to the height hO~hl.O. Furthermore, the above-mentioned $Quest frequency is set to be suitable for the camera lens! The Nyquist frequency of the combined sensor (solid-state imaging device) corresponds to the value of the spatial frequency of the solvable image calculated from the pixel pitch of the sensor. In terms of body I, the Nyquist frequency N (eight) of the sensor (unit: lp/mm) is

Nyq. = l/ (sensor pixel pitch) /2 is calculated. When measuring the characteristics of FIG. 5 to FIG. 2G, the sensor is applied as follows: VGA type, size is 1/13 type, pixel size (pixel pitch) is 1.75 μηι, and D (diagonal) is Uoo mm, H (horizontal) size is 1.120 mm 'V (vertical) size is 〇84〇mm. Further, in order to obtain the characteristics shown in Figs. 5 to 20, it is assumed that the object distance is 500 mm, and the analog light source (not shown) is used in the following manner by using the following weighting ratio (the mixing ratio of the respective wavelengths constituting white) Adjust) white light 0 404.66 nm=0.13 435.84 nm=0.49 486.1327 nm=l.57 546.07 nm=3.12 587.5618 nm=3.18 656.2725 nm=l .5 1 Figure 51 curve 51 shows the object 3 with the imaging lens i Imaging and shape 154059.doc •16- 201133037 The center of the image corresponds to the relationship between the height of the ho and the focus displacement position of -0.1 mm~ol mm relative to the MTF. Curve 51 indicates that there is a peak of MTF at a focus displacement position of 0.025 mm. In other words, at the focus displacement position of 0.025 mm, the maximum resolution is obtained at a height h〇. The 0.025 mm focus shift position is equivalent to the position Sa shown in Fig. 1. On the other hand, the image plane S5 (see Fig. 1) of the actual image pickup lens 1 corresponds to a focus shift position of 0 mm. Further, it can be understood from this that the Pdis of the image pickup lens 100 becomes 〇_〇 25 mm (refer to Table 5). Moreover, the focal length f of the imaging lens 100 is 〇_853 mm (refer to Table 5). Therefore, the Pdis/f of the image pickup lens 100 becomes 0.029, which is a value satisfying the relationship (丨). Fig. 6 and Fig. 7 show the characteristics of the position of the image plane 35 determined in accordance with the graph of Fig. 5. As shown in FIG. 6, the image pickup lens ι has the following MTF characteristics: in the south spatial frequency band exceeding 70 lp/mm, the mtf of the sagittal image plane of the image height hi is slightly decreased, but in other cases Even if the MTF is high for any image height of the image height h0 to hl. ,, as the integrated image-capturing ability, it is considered that the image formed by imaging the object 3 by using the image pickup lens 1 is compared with the previous image pickup lens. From the center to the periphery, it has excellent resolution. As shown in FIG. 7, the imaging lens 1 is an image height h0.8 (0.56 mm) or more for the curve 74 indicating the MTF of the sagittal image plane corresponding to the spatial frequency of "Nyquist frequency/2". The MTF dropped slightly. However, for the MTF of the tangential image plane representing the spatial frequency of the Nyquist frequency §, § 154059.doc -17- 201133037 line η and the curve representing the MTF of the paper surface of the same spatial frequency 72. And the curve 73 indicating the MTF of the tangential image plane corresponding to the spatial frequency of the "Nysterst frequency/2", even if the image height is (10) Μ ( 0 (() 7 has an arbitrary image height. Therefore, the overall resolution of the 'imaging lens (10) is superior to that of the previous imaging lens, and it is considered to have excellent resolution from the center to the periphery of the image formed by imaging the object 3 by the imaging lens 100. According to the curves shown in (4) and (8) of Fig. 8, it can be seen that the tangential image plane (7) and the sagittal image plane (8) have a small amount of aberration (the opposite of the normal direction with respect to the optical axis ^). Since the difference in the size of the difference is small, the imaging lens 1 has good optical characteristics. [MTF and aberration characteristics of the imaging lens 200] Fig. 9 shows the vertical axis of the imaging lens 2, which is the defocus Μτρ The relationship between the MTF and the position of the focus displacement indicated by the horizontal axis, and its graph 5 corresponds to each of the characteristics of the image pickup lens 2. Fig. 1 shows a relationship between the MTF indicated by the vertical axis of the image pickup lens 200 and the spatial frequency of the horizontal axis, and corresponds to Fig. 6 Each characteristic of the imaging lens 200 is shown in Fig. 11 which shows the relationship between the MTF indicated by the vertical axis and the image of the horizontal axis of the imaging lens 2, which corresponds to Fig. 7 and shows each of the imaging lenses 200. Fig. 12 is a graph showing characteristics of various aberrations of the image pickup lens 200, showing astigmatic aberrations, and (b) showing distortion, and respectively showing images corresponding to (a) and (b) of Fig. 8 . Each characteristic of the lens 2 is 154059.doc 201133037 The curve 91 of FIG. 9 indicates the image height h0 and -0.1 mm corresponding to the center of the image formed by imaging the object 3 by the imaging lens 200. The relationship between the focus displacement position of 0_ 1 mm and the MTF. Curve 91 indicates that there is a peak of MTF at the focus displacement position of 0.025 mm, in other words, at the focus displacement position of 0.025 mm, the image height h0 is the largest. Resolution capability. The 0.025 mm focus shift position On the other hand, the image plane S5 (see FIG. 2) of the actual image pickup lens 200 corresponds to a focus shift position of 0 mm. Further, it can be understood from this that the Pdis of the image pickup lens 200 In addition, the focal length f of the imaging lens 200 is 0,853 mm (refer to Table 5). Therefore, Pdis/f of the imaging lens 200 becomes 0·029, and the value of the relational expression (1) is satisfied. 10 and 11 show the characteristics of the position of the image plane S5 determined according to the graph of Fig. 9. As shown in FIG. 10, in the higher spatial frequency band of the imaging lens 200 exceeding 70 lp/mm, the MTF of the sagittal image plane of the image height hl. O is slightly decreased, but in other cases, even Any image height of the image height h0~hi.0 has a higher MTF characteristic, and the integrated image decoding capability is considered to be from the center of the image formed by imaging the object 3 to the periphery as compared with the previous image pickup lens. Excellent image resolution. As shown in FIG. 11, the imaging lens 200 has an image height h0.8 (0.56 mm) or more for the curve 114 indicating the MTF of the sagittal image plane corresponding to the spatial frequency of "Nyquist frequency/2". MTF dropped slightly. However, for the curve 111 representing the MTF of the tangential image plane of the spatial frequency of the Nyquist frequency /4 and the curve representing the MTF of the sagittal image plane of the same spatial frequency, the phase 154059.doc •19-201133037丨丨2, and the curve 113 of the MTF indicating the tangential image plane of the spatial frequency corresponding to the "Nyquist frequency/2", even for any image with an image height h〇~hl 〇(〇7 mm) High average has a higher MTF. Therefore, the integrated image-capturing capability of the image pickup lens 2 is superior to that of the conventional image pickup lens, and it is considered to have excellent resolution from the center to the periphery of the image formed by imaging the object 3 by the image pickup lens 200. According to the curves shown in (a) and (b) of FIG. 12, it is understood that the tangential image plane (D) and the sagittal image plane (s) are small in residual aberration amount (and relative to the optical axis La). Since the line direction has a small deviation from the magnitude of each aberration, the imaging lens 2 has good optical characteristics. [MTF and aberration characteristics of the imaging lens 300] FIG. 13 is a graph showing the relationship between the MTF of the vertical axis of the imaging lens 3, that is, the MTF indicated by the vertical axis, and the focus displacement position indicated by the horizontal axis, which corresponds to Fig. 5 shows the characteristics of the image pickup lens 3''. Fig. 14 is a graph showing the relationship between the MTF indicated by the vertical axis of the imaging lens 3 and the spatial frequency indicated by the horizontal axis, and the characteristics of the imaging lens 300 are shown in Fig. 6 . Fig. 5 is a graph showing the relationship between the MTF indicated by the vertical axis of the image pickup lens 300 and the image of the horizontal axis, and shows the characteristics of the image pickup lens 300 corresponding to Fig. 7 . Fig. 16 is a graph showing the characteristics of various aberrations of the imaging lens 3, which is different from u) for astigmatic aberration, and (b) for distortion, and corresponds to Fig. 8 154059.doc • 20-201133037, respectively ( A) and (b) show the characteristics of the image pickup lens 300. A curve 131 of FIG. 13 indicates an MTF which is opposite to the focus displacement position of _〇丨mm to 〇丨mm when the image height h〇 corresponds to the center of the image formed by imaging the object 3 by the imaging lens 3〇〇. relationship. Curve 131 indicates that the peak displacement position at 0.024 mm has a peak of the river ridge, in other words, at the focus displacement position of 0.024 mm, the maximum resolution is obtained when the image is at a high level. The focus displacement position of the 〇 24 mm is equivalent to the position Sa shown in Fig. 3. On the other hand, the image plane S5 (see Fig. 3) of the image pickup lens 3 is actually at a focus shift position of 0 mm. Further, it can be understood from this that the Pdis of the image pickup lens 300 becomes 〇.〇 24 mm (refer to Table 5). Further, the focal length f of the imaging lens 300 is 0.872 mm (refer to Table 5). Therefore, Pdis/f of the image pickup lens 300 becomes 〇·〇28, and the value of the relational expression (1) is satisfied. Fig. 14 and Fig. 15 show the respective characteristics of the position of the image plane S5 determined by the graph of Fig. 13. As shown in FIG. 14, in the higher spatial frequency band of the image pickup lens 3 exceeding 85.74 lp/mm, the MTF of the sagittal image plane of the image height hl. 略 is slightly decreased, but in other cases, even It is considered to have the MTF characteristic of any image height like high h〇~hl '' and the comprehensive resolution is compared with the previous imaging lens, and it is considered that the image formed by imaging the object 3 by the imaging lens 3 is used. Excellent resolution from the center to the periphery. As shown in Fig. 15, the image pickup lens is 154059.doc 21 201133037 image height h0.85 (0.595 mm) for the curve 154 representing the MTF of the sagittal image plane corresponding to the spatial frequency of "Nyquist frequency/2". The above MTF decreased slightly. However, the curve 151 indicating the MTF of the tangential image plane corresponding to the spatial frequency of the Nyquist frequency/4 and the curve 1 52 indicating the MTF of the sagittal image plane of the same spatial frequency, and the equivalent of " The curve 153 of the MTF of the tangential image plane of the spatial frequency of the Nyquist frequency/2" has a higher MTF even for any image height of the image height h0 to hl.0 (0.7 mm). Therefore, the integrated image-capturing capability of the image pickup lens 300 is superior to that of the previous image pickup lens, and it is considered to have excellent resolution from the center to the periphery of the image formed by the image pickup lens 300. According to the curves shown in (a) and (b) of FIG. 16, it can be seen that the tangential image plane (T) and the sagittal image plane (S) have a small residual aberration amount (for the normal to the optical axis La). Since the magnitude of the aberration of the direction is small, the imaging lens 300 has good optical characteristics. [MTF and Aberration Characteristics of Imaging Lens 400] FIG. 17 is a graph showing the relationship between the MTF indicated by the vertical axis and the focus displacement position indicated by the horizontal axis of the defocus MTF of the imaging lens 400, and the display corresponds to FIG. Each characteristic of the imaging lens 400. Fig. 18 is a graph showing the relationship between the MTF indicated by the vertical axis of the imaging lens 400 and the spatial frequency indicated by the horizontal axis, and shows the respective characteristics of the imaging lens 400 corresponding to Fig. 6. Fig. 19 is a graph showing the relationship between the MTF indicated by the vertical axis and the image height indicated by the horizontal axis of the image pickup lens 400, and shows the respective characteristics of the image pickup lens 400 corresponding to Fig. 7. Fig. 20 is a graph showing the characteristics of various aberrations of the image pickup lens 400, and is divided into 154059.doc • 22-201133037. (a) indicates astigmatic aberration, (b) indicates distortion, and each display corresponds to Fig. 8 ( The characteristics of the imaging lens 4 of a) and (b). A curve 171 of Fig. 17 indicates the relationship of the MTF of the focus displacement position with respect to the center of the image h formed by the image pickup lens 4 at the image height h0 with respect to _〇"mm~〇" mm. Curve 171 indicates that the focus displacement position at 〇_〇 23 mm has a peak of MTF, in other words, at the focus displacement position of 0.023 mm, the maximum resolution is obtained at the image height 。. The focus displacement position of 0 〇 23 mm corresponds to the position Sa shown in Fig. 4. On the other hand, the image plane S5 (see Fig. 4) of the actual image pickup lens 4 corresponds to a focus shift position of 0 mm. Therefore, the imaging lens 4 can be understood.

Pdis becomes 0.023 mm (refer to Table 5). Further, the focal length f of the imaging lens 400 is f*〇891 mm (refer to Table 5). Therefore, Pdis/f of the image pickup lens 400 becomes 〇〇26, which satisfies the value of the relational expression (1). Fig. 18 and Fig. 19 show the characteristics of the position of the image plane S5 determined based on the graph of Fig. 17. As shown in FIG. 18, the imaging lens 4 is in a higher spatial frequency band of more than 1 〇〇 ip/mm, and the river image of the sagittal image plane of the high hi.0 is slightly decreased, but even if For any image height such as high h〇~hi·〇, it has a higher MTF characteristic, and the comprehensive resolution capability is compared with the previous imaging lens, which can be said to be formed by imaging the object 3 with the imaging lens 400. From the center of the image to the periphery, it has excellent resolution. As shown in FIG. 19, for the image lens 194 representing the mTF of the sagittal image plane corresponding to the spatial frequency of "Nyquist frequency/2", 154059.doc •23·201133037 image height h0 The Μτρ above .9 (0.63 mm) decreased slightly. However, the curve 191 indicating the MTF of the tangential image plane corresponding to the spatial frequency of the Nyquist frequency/4 and the curve 192 indicating the orphan image plane of the same spatial frequency are equivalent to "Nyquis". For the MTF curve 193 of the tangential image plane of the spatial frequency of the special frequency /2", even if the image height h〇~hi 〇 (〇7 mm: any image height has a higher image, the imaging lens Compared with the previous imaging lens, the comprehensive imaging capability can be said to have excellent resolution from the image of the image formed by imaging the image of the object 3 to the periphery. According to (4) and (Fig. 2G) b) For each of the curves shown, it can be seen that the tangential image plane (7) and the sagittal image plane (8) have a small residual aberration amount (relative to the normal direction with respect to the optical axis ^, and the magnitude of each aberration is small. Therefore, the imaging lens has good optical characteristics. Further, in view of the excellent resolution of the image around the image formed by imaging the object 3 by the imaging lens 1, it is considered that the imaging lens 3 is superior to the imaging. The lenses 100 and 200, and the imaging lens 4 is also superior to the imaging lens 3〇 [Table 1] is a table showing design data of the image pickup lens 100. [Table 2] is a table showing design data of the image pickup lens 200. [Table 3] shows the image pickup lens 3 [Table 4] is a table showing design data of the imaging lens 4 。. [Table 5] shows the imaging lens 1 〇〇, the imaging lens 2 〇〇, the imaging lens 300, and A table in which the imaging lens 4 is disposed on the image plane S5 and the sensor (solid-state imaging device) is disposed to form an image sensor module. I54059.doc

•24· 201133037 [ϊ&lt;] 154059.doc ool^^TW^-^] Εε05.0^, 'γ(Λ)ΙΓ钿Τ · εεο-ι^, 'γϊ)^^* εεο§-5Γ, γ (α)¥^- εες-ι 嫦迓This *琏机械•踮茛瑶到寂ν°Λ ,^钵2-: Chowder bracelet&quot;:? Tian Youyou I aspheric coefficient 1 VO &lt; 1 I -1.3582464E+12 1 I 4.1680076E+09 1 I 1 &lt; 1 Μ .7585772Ε+11 1 I -9.7944828E408 1 1 I 1 (S &lt; 1 | -8.7369257Ε+09 | | 9.3225962E+07 | 1 I Coveted &lt; • 1 2.2019684Ε+08 | | -4.6398799E+06 | 1 1 1 Μ 1 1 -3.0660223Ε+06 | | 1.3115032E+05 | 1 垂• 1 [2.3689743Ε+04 | Γ -2.1847802E+03 | • ι 1 • | -9.9305667Ε+01 | | 2.2037641E+01 | ' ' • 1 cone coefficient | ' [0.00Ε+00 1 1 0.00 E+00 1 • ' The sum | 0.152 I [0.160 | 1 0.250 | • * • 17 core thickness [mm] | 0.021 I 00 &lt;N Ο | 0.729 | | 0.545 | | 0.050 | 1 • 1 -0.48964076 | -2.70742185 | 1 1 &lt; vB 1 S ΙΛ C/5 1 -D 1 S ' 1 00 1.516 ' 1 ritual light 1 8 I sensor 1 os^^iik1 1 Aspheric coefficient 1 [_ A16 I • I -1.0911299E+12 1 I 4.0872282E+09 1 1 1 1 | A14 J 1 I 1.5535276E+11 1 | -9.7563241E+08 | 1 1 1 1_A12_I 1 | -8.2478268E+09 | | 9.4286154E+07 | 1 • 1 Γ A10_! 1 | 2.1975265E+08 | | -4.7487958E+06 | 1 I 1 00 &lt; 1 | -3.2201249E+06 | I 1.3442932E+05 | I 1 1 | 2.6089023E+04 | Γ-2.ΙΒ71469Ε+03 | 1 1 1 • | -1.1335464E+02 | I 2.0489872E+01 | 1 1 1 I Cone | 1 | O.OOE+OO | 0.00E+00 | 1 1 1 Effective radius [mm] | 0.152 I | 0.160 | | 0.251 1 Vertical 1 1 Center thickness [mm] 1 0.022 | | 0.282 | | 0.762 | | 0.500 | 0.050 | 1 Curvature [mm·1 ] | | -0.45255527 | I -2.68170597 | 1 1 ΐΛ m C/3 I Material • S • g 〇〇 VO ' 1 aperture stop 1 transparent Ο u I sensor | ooe冢铕-班 [e1 1 non Spherical Coefficient | 1 Α16 III -1.1387877E+12 II 4.1770778E+09 I « 1 1 1— AH III 1.562513IE+11 I | -9.8339503E+08 | 1 1 1 1_^_I « 1 -8.2224741 E+09 | I 9.4050546E+07 | 1 • 1 1_Α10_I 1 | 2.1938156E+08 | | -4.7257411EK)6 | 1 t 1 CO • | -3.2303272E+06 | | 1.3567214E+05 | 1 1 1 1 ΓΤ6354085Ε+04 | | -2.3000 丨20E+03 | 1 1 垂1 | -1.1597910E+02 | | 2.3075423EK)! | 1 1 t 1Cone coefficient | I 1 O.OOE+OO | 1 0.00E+00 | 1 1 1 1 Effective radius | [mm] 1 0.156 1 | 0.163 | | 0.250 | 1 1 Vertical 1 center thickness [mm] 1 0.024 1 | 0.278 | 0.852 | I 0.500 | | 0.050 | 1 余菊_ε旦 | -0.51575391 | I -2.67902476 | ' • S3 vn Vi | Materials | *Ό s ' OO § SO »n * Element 1 ceremony light ι 透锐 au I sensor | 0§^^祭%[5] 1 aspheric coefficient | Ό &lt; • 1 -1.I845780E+12 1 | 4.0932129E+09 | 1 1 1 inch&lt; 1 | I.56714457E+I1 [-9.6459493E+08 | 1 1 t ΓΊ &lt; 1 | -8.1733015E+09 | | 9.2865067E+07 | 1 1 • 〇&lt; ' | 2.I922941E+08 | | -4.7424530E+06 | 1 • 00 &lt; • I -3.2722599E+06 | | 1.4034589E+05 | 1 1 1 ΓΪ7211944Ε+04 | | -2.4860818E+03 | 1 t 垂' I -1.2230882 E+02 | | 2.5975736E+01 | 1 &lt; I Cone System ΪΠ ' | O.OOE+OO | | O.OOE+OO | • 1 Effective Radius [mm] | 0.159 1 | 0.166 | | 0.251 | &lt; 1 1 珅£ ^ ε •ί*&quot ; | 0.025 | | 0.274 | | 0.955 | | 0.500 | | 0.050 | 1 Curvature [mm'1] * | -0.54648856 | | -2.65467688 | • ' « vS C/5 V» ! •a • S • 2 • 00 VO u-| • 1 aperture stop | 〇U ί sensor ι -25- 201133037 [Table 2] [Table 5] Camera lens 100 Lens 200 imaging lens 300 imaging lens 400 coke ratio 2.80 2.80 2.80 2.80 focal length f [mm] 0.853 0.853 0.872 0.891 viewing angle [deg] D (diagonal) 74.6 74.6 69.6 64.7 H (horizontal) 59.9 59.9 56.0 52.0 V (vertical) 45.2 45.2 42.2 39.3 TV distortion [%] -3.68 -3.71 -3.15 -2.61 Peripheral light ratio [%] 0.6h 88.5 88.4 89.2 90.1 0.8h 81.0 80.7 82.3 83.9 l.Oh 71.7 71.5 73.8 76.2 CRA [deg] 0.6h 16.6 16.5 15.6 14.6 0.8h 21.7 21.6 20.4 19.3 l.Oh 26.6 26.4 25.1 23.6 Optical full length (including CG) [mm] 1.626 1.615 1.704 1.805 CG thickness [mm] 0.545 0.500 0.500 0.500 Lens center thickness d [mm] 0.281 0.282 0.278 0.274 Lens optical effective radius End thickness d' [mm] 0.203 0.203 0.205 0.203 d'/d 0.723 0.721 0.737 0.739 d/d2 0.25 0.25 0.23 0.21 Pdis [mm] 0.025 0.025 0.024 0.023 Pdis/f 0.029 0.029 0.028 0.026 Determination [Table 1]~[Table For each of the data, the sensor uses the following: VGA type, size 1/13, pixel size (pixel pitch) is 1.75 μιη, D (diagonal) size is 1.400 mm, Η (horizontal ) the size is 1.120 mm V (vertical) size of 0.840 mm. Further, in order to obtain the characteristics shown in [Table 5], it is assumed that the object distance is 500 mm, and as an analog light source (not shown), the following weighting is used (the mixing ratio of each wavelength constituting white is adjusted as follows) ) White 154059.doc -26- 201133037 shades of light. 404.66 nm=0.13 435.84 nm=0.49 486.1327 nm=l .57 546.07 nm=3.12 587.5618 nm=3.l8 656.2725 nm=l .5 1 [Table 1]~[Table 4] The items "Elements" are respectively The line of "Live" indicates the design information related to the aperture stop 2, and the line of 9 "lens" indicates the design data related to the single lens L' in "CG" - the line indicates the 0 and 0 data related to the cover glass (3). The row of the detector indicates the design information related to the sensor disposed on the image plane S5. In the item "Material" of [Table 4], "Nd" indicates that the single lens L and the cover glass CG are opposite to the d-ray, and "vd" indicates the single lens L and the cover glass. The Abbe number of CG versus d-ray. As is apparent from the present item, the imaging lens 100, the imaging lens 200, the imaging lens 3A, and the imaging lens 400 are all preferable, and the refractive index of the single lens L· is more than 1 4 丨·498 'single lens L The number of bets is more than 43 of 46. The items "surfaces" iS1 to S5 of the table [Table 4] correspond to the surface S1, the surface S3, the surface S4, and the image surface S5', respectively, and the design data relating to the respective surfaces are shown in the same direction. The item "curvature" of [Table 4] [Table 4] indicates the curvature of the faces S1 and S2 of the single lens L. [Table Π ~ [Table 4] The item "Center Thickness" indicates the center of the corresponding surface to 154059.doc • 27- 201133037 Optical axis La (refer to Figure 丨 ~ Figure 4 to the image side S5 side as the center of the lower side) The distance from the direction. [Table 1] ~ [Table 4] The item "Side of the single lens L and the effective radius of the diameter of S2" means that the aperture stop 2, and the half of the circular area that can limit the beam range [Table 1] [Table 4] The term "aspherical coefficient" indicates that the surface of the single lens l = the aspherical surface of the aspherical surface (4) constituting each aspheric surface (1 is an even number of 4 or more). In the aspherical type (4), the coordinate of the Z-axis direction (direction 2 of Fig. 1) and the coordinate of the normal direction of the optical axis (the X direction of Fig. 1), the radius of curvature of the ruler (the inverse of the curvature) Number), κ system conic coefficient. [Equation 1] (4) As shown in the item "Aspherical Coefficient" of [Table 1] to [Table 4], the imaging lens 1GG, the imaging lens 2GG, the imaging lens 3GG, and the imaging lens 400 are all directed to the single lens L. The aspherical coefficients are imparted to both sides, whereby the two faces of the single lens 1 have an aspherical shape. It is preferable to use the single lens L· whose both surfaces are aspherical, and it is possible to easily and satisfactorily correct various aberrations in the imaging lens 1. As shown in [Table 5], since the imaging lens, the imaging lens 2, the imaging lens 3, and the imaging lens 400 have a focal length of less than 3, 28 Å, a high resolution can be obtained. In the item "focal length f" of [Table 5], the focal length f of the entire imaging lens 1 is 154059.doc

• 28- 201133037 Unit: mm. In the "project perspective", the angle of view of the image pickup lens 1 can be used = image lens! The angle of imaging is expressed in units of deg (.) and is represented by three-dimensional parameters of = diagonal, H (horizontal), and V (vertical). The angle of view of the camera lens (fire level) is 52. The above can be used as a wide-angle lens for a portable terminal, such as a lens. In the item "peripheral light amount ratio" of the table, the peripheral light amount ratio of the image pickup lens 1 of the image height hG.6, the image height_, and the image space h1.0 is shown (relative to the light amount of the image height h〇). The ratio of the amount of light). The image pickup lens 1 is obtained at an image height hl. /. Above the higher amount of light. ▲ [Table 5] The item "CRA" indicates the image lens of height h〇6, image height h〇8, and Nhl.〇! The chief ray angle (Chief ruler)

Angle : CRA). The item "Optical full length (including CG)" in [Table 5] indicates the distance from the aperture lens 2 to the imaging lens 1 from the boring tool to the image plane S 5. That is, the optical full length of the imaging lens 丨Refers to the total of the dimensions in the optical axis direction of all the components that have some influence on the optical characteristics. The item "CG thickness" in Table 5 indicates the thickness of the cover glass (3) in the optical axis direction. The item "Lens center thickness d" of [Table 5] indicates the thickness of the center of the single lens [i.e., the distance from the center sl to the center 82 of the single lens L. [Item 5] The item "lens optical effective radius end thickness" indicates the thickness of the end portion of the effective aperture of the single lens L, that is, the distance from the end portion ei (ea) of the single lens L to the end portion e2 (eb). . In particular, in the imaging lens 1 〇〇, the imaging lens 154059.doc -29·201133037 200, the imaging lens 300, and the imaging lens 4, the thickness of the thinnest portion of the effective aperture of the single lens L corresponds to the d. As shown in the present item, the thickness d of the thinnest portion of the effective aperture of the single lens 1 in the imaging lens 100, the imaging lens 200, the imaging lens 300, and the imaging lens 400 is 0.203 mm, 0.203 mm, and 0.205, respectively. Mm, 0.203 mm, both exceeding 150.150 mm (ie 150 μηη), is preferred. As is apparent from the item "dVd" of [Table 5], d, /d of the imaging lens 1 〇〇, the imaging lens 200, the imaging lens 3 〇〇 ', and the imaging lens 4 〇 are both more than 〇·5 and smaller than 〇. .9, thus becoming the value of the above relationship. As is apparent from the item rd/d2 of [Table 5], d/d2 of the imaging lens 1 〇〇, the imaging lens 200, the imaging lens 3 〇〇, and the imaging lens 4 〇 () exceeds 〇·18 and is smaller than 〇.3〇, so it becomes the value satisfying the above relation (2). The item "pdis" in [Table 5] indicates the specific value of Pdis. The item "pdis/f" in [Table 5] indicates the specific value of Pdis/f. As described above, in the imaging lens 100, the imaging lens 200, the imaging lens 3, and the imaging lens 400, Pdis/f is satisfied. The value of formula (1). [Manufacturing Method of Camera Module 270] FIGS. 21(a) to 21(c) are cross-sectional views showing a method of manufacturing the camera module 270. 21(a) to (c) show an example in which the image pickup module 270 is manufactured by a manufacturing process called a wafer level lens process. The wafer-level lens process is a manufacturing process in which a plurality of single lenses L are formed or formed on the same surface with respect to a molded object such as a resin, thereby producing a lens array 211' and having a plurality of pixels on the same surface. The sensor array 217 of the sensor 218 is equipped with a sensor array on the lens array 211 in such a manner that each single lens L is disposed opposite to each of the sensors 218 154059.doc • 30·201133037. After 217, the combination of the single lens L and the sensor 218 arranged in the opposite direction is divided into units by the dividing line 220, whereby the camera module 27A is manufactured. According to this manufacturing procedure, a large number of camera modules can be manufactured in a short time, so that the manufacturing cost of the camera module can be reduced. In recent years, development of a so-called heat-resistant camera module using a thermosetting resin or a UV curable resin as a material of the single lens L has been progressing. The camera module 270 described here is one of the heat-resistant camera modules, and a thermosetting resin or a UV curable resin is used as the material of the single lens 1. The reason why a thermosetting resin or a UV curable resin is used as the material of the single lens 1 is to collectively manufacture a large number of camera modules 207 in a short time, thereby reducing the manufacturing cost of the camera module 27, and The image pickup module 270 including the image pickup lens 1 can be reflowed. The technique for manufacturing the camera module 270 proposes a plurality of types of β which are representative of the injection molding process and the wafer level lens process described in detail below. Special Series Recently, a more favorable wafer level lens (reflowable lens) process was considered in the manufacturing time of the camera module and other comprehensive findings. In the case of the η-day-circle lens process, it is necessary to suppress the plastic deformation of the single lens 1 due to heat. According to this necessity, it is necessary to use a thermosetting dendritic material which is hard to be formed by heating and which is excellent in heat resistance, or a wafer-level lens (lens array) which is a single lens L as a single lens L. : Specifically, t, a wafer-level lens having a heat-curable resin material or a UV-curable resin material having a heat resistance of a temperature of 26 〇 to 28 ° C, a degree of heat resistance, or a UV curable resin material attention. % 154059.doc -31· 201133037 Prepare an array upper mold 212 having a convex portion on the same surface. In the wafer level lens process, first, the surface has the same shape as the surface S1 of the single lens L. A plurality of array lower molds having a concave shape opposite to the surface of the single lens L are formed thereon, and the convex portions of the array upper mold 212 are in one-to-one correspondence with the concave portions of the array lower mold 213, and One of the convex portions is disposed opposite to one of the concave portions corresponding to the one convex portion. The array upper mold 212 and the array lower mold 213 are sandwiched with a thermosetting resin or a UV curable resin and heated to be heated. After hardening, a lens array 211 having a single lens L formed on the same surface in accordance with a combination of the corresponding convex portion and concave portion is formed (see FIG. 21(a)). A sense of forming a plurality of sensors 218 on the same surface is prepared. The detector array 217. The spacing of the sensors 218 formed on the sensor array 217 is the same as the spacing of the single lenses 1 formed on the lens array 211. As shown in Fig. 21 (b), The sensor array 2丨7 is pre-set with a level that can collectively cover the plurality of sensors 218 The larger cover glass 216* is also disposed between the cover glass 2丨6 or the sensor array 2丨7 and the lens array 211, as shown in FIG. 21(b), and may be provided for fixing as needed. The spacer array 215 is mounted on the lens array 211. Here, the sensing array 217 is mounted on the lens array 211 via the spacer 215 and the cover glass 216. The lens array 211 and the sensor array 217 are disposed opposite to each of the single lenses L and the respective sensors 218 with respect to one single lens L (see FIG. 21(b)). Further, in the step shown in FIG. 21(b), a light-shielding member which becomes the aperture stop 2 is mounted around each concave portion of the surface 81 of each lens L of the lens array 211 which is 154059.doc -32-201133037.遮光) 214. The light shielding member (the aperture) 214 is disposed on the outer peripheral portion of each concave portion so as to expose the concave portions of the lens array 2 11. As a method of positioning between the lens array 211 and the sensor array 217, List a variety of methods such as positioning on the side of the camera, and positioning is also processed by wafer spacing. After the steps shown in FIG. 21(b), the plurality of camera modules 270 in an array form are disposed in opposite directions, and the single lens L and the sensor 218 are disposed, and the single lens L and the sensor are interposed therebetween. The aperture stop 2 (one part of the light shielding member 2丨4) between the 218, the spacer 219 (one part of the spacer 215), and the cover glass CG (one part of the cover glass 216) are one set The combination unit, in other words, the ι camera module 270 as a unit is divided by the dividing line 22 (see Fig. 21 (c)). According to the above steps, one camera module 270 is completed. According to the wafer level lens process shown in Figs. 21(a) to (c), a plurality of image pickup modules 270 are collectively manufactured, whereby the manufacturing cost of the image pickup module 27 can be reduced. Further, when the completed camera module 270 is mounted on the substrate, the heat generated by the reflow (the maximum temperature is about 260 degrees Celsius) can be prevented from being plastically deformed by the single lens L. Therefore, the single lens L is preferably used relatively. A thermosetting resin or a uV curable resin having a resistance of 20 Torr to 28 deg. In this way, the camera module 27 can be implemented. In the wafer-level manufacturing step, a heat-resistant resin material is further used, whereby an image pickup module capable of supporting reflow can be manufactured at low cost. [Composition of camera module 1]

SS 154059.doc •33· 201133037 FIG. 22 is a cross-sectional view showing the configuration of the camera module 27〇. The camera module 27 is the same as that produced by the wafer level lens process shown in FIGS. 21(a) to (c). The camera module 270 is provided with an aperture stop 2, a single lens L, a spacer 219, and a protector. Cover glass CG, and sensor 218. Among them, the aperture stop 2, the single lens, and the cover glass CG constitute an imaging lens 丨 (see Fig. 4 to Fig. 4), and have the same configurations and functions as those of the imaging lens 1, and therefore detailed description thereof will be omitted. The spacer 219 is placed on the cover glass CG and has a single lens mounted thereon, and the interval between the single lens L and the sensor 218 on which the cover glass CG is mounted is fixed to a desired interval in accordance with the size of the spacer 219. . The sensor (solid-state imaging device) 218 is disposed on the image plane S5 (see FIG. 4 to FIG. 4 ) of the imaging lens 1 which is a component of the imaging module 27 , and is formed by imaging the object 3 by the imaging lens 1 . Receive as an optical signal and convert the optical signal into an electrical signal. The sensor 218 is constituted by a well-known electronic imaging element or the like. Here, the sensor 218 is preferably a VGA type imaging element, whereby the camera module 27A having good resolution can be realized, and the number of lenses can be reduced to one single lens L, thereby reducing The cause of manufacturing tolerances may occur, so that a camera module 27 that is simple to manufacture can be realized. Moreover, the size (pixel pitch) of the pixels of the sensor 218 is preferably 丄5 μ or less, whereby the camera module 270 ′ that effectively utilizes the image capturing capability of the imaging lens 可 can be realized and by the sensor 218 In the miniaturization, the imaging lens 1 and the imaging module 270 can be miniaturized, so that the imaging module 270 such as a smaller digital camera can be realized. I54059.doc -34 - 201133037 Sensor 218 light # estimating field / , , _ is preferably used, for example, to obtain the above various characteristics VGA type, size is 1/13 uni, pixel size (pixel pitch) is 1.75 The size of the angle is Η (horizontal) and the size of i 12〇mm V (vertical) is 0.840 mm. The camera module 270 is not provided to adjust the camera lens! The focal point of the organization. Since the imaging lens 1 has a feature of obtaining a good resolution of the image formed by imaging the object 3, it is possible to realize the configuration. That is, the camera module 270 does not need to adjust the position of the sensor 218 in the optical axis La direction of the imaging lens 1 with respect to the position of the most excellent image surface, so that it can be omitted (4) "Adjust the focus of the imaging lens i before the m necessary. Further, by omitting the mechanism, the camera module 270 can reduce the manufacturing cost. Further, according to the above configuration, the camera module 27 can omit the lens barrel and/or the lens holder, so that the manufacturing steps can be reduced and configured. Fig. 23 is a cross-sectional view showing a configuration of a camera module 28, which is a modification of the camera module 270. The camera module 280 is coupled to the camera. The module 270 is different in the following aspects. Unlike the camera module 270, the camera module 280 does not use the spacer 219. On the other hand, the camera module 28 is different from the camera lens group 270. A lens side surface 231 that protrudes toward the image plane S5 side is formed on L. Further, the lens side surface 231 corresponds to a region of the outer peripheral portion of the effective aperture in the single lens L. 154059.doc -35- 201133037 protrudes toward the image plane S5 side Lens side 23 1 is placed on the cover glass CG and integrally formed with the single lens L and has the same function as the spacer 219, that is, corresponding to the protruding size of the lens side surface 231, the single lens 1 and the cover glass are mounted thereon. The interval of the CG sensing β 218 is fixed to the required interval. In addition, the configuration of the camera module 280 is the same as that of the camera module 277. The spacer 219 is not required in the camera module 280, and is not set by The configuration of the spacer 219 can further reduce the number of manufacturing steps and reduce the number of components, thereby achieving further cost reduction. [Configuration of Camera Module 3] FIG. 24 shows another modification of the camera module 270. A cross-sectional view of the camera module 290. The camera module 290 is different from the camera module 270 in that it is different from the camera module 270, and the camera module 290 does not use the spacer 219. Unlike the module 270, the single lens L of the camera module 290 is inserted and fixed to the lens barrel 241 mounted on the cover glass cg. The lens barrel 241 is placed on the cover glass cG, and the inserted single lens L is fixed. 'With and spacer The same function of 219 is to fix the interval between the single lens 1 and the sensor 21 8 on which the cover glass CG is mounted at a desired interval. Further, the aperture stop 2 is formed as a part of the lens barrel 241. The camera module 290 has the same configuration as the camera module 27. The camera module 270, the camera module 280, and the camera module 29 have a wide viewing angle and are small, and have good resolution and are preferably used. The image pickup lens of the present invention is characterized in that the image pickup lens of the present invention is characterized in that the single lens system is 154059.doc.

• 36 - 201133037 Foot 0.5&lt;d’/d&lt;0.9 The relationship between _ν· &amp;# _l,. <The structure of the relationship. Where d• is the thickness of the end of the effective aperture of the single lens. When the d'/d is 0.5 or less, the single lens becomes too thin, and the productivity of the image pickup lens may be degraded due to the limitation of the applicable manufacturing procedure. When it is G.9 or more, it is difficult to correct the solution around the image. Like ability. If these aspects are considered, cT/d is preferably more than 〇5 and less than 〇9. Further, the image pickup lens of the present invention is characterized in that the thickness of the thinnest portion of the effective perforation of the single lens exceeds i 5 〇 . According to the above configuration, since the single lens does not become too thin, an image pickup lens excellent in productivity can be realized. Further, the image pickup lens of the present invention is characterized in that the focal ratio is less than 3. According to the above configuration, since the focal ratio is less than 3, the amount of received light can be increased, and chromatic aberration can be corrected satisfactorily, so that a high resolution can be obtained. Further, the image pickup lens of the present invention is characterized in that the single lens has a refractive index of more than 1.4 and an Abbe number of more than 43. According to the above configuration, a material having an optical constant having a lower refractive index and a higher dispersion value can be applied to a single lens, so that an option of a material constituting a single lens can be increased, thereby being applicable to inexpensive material selection and materials. Restricted manufacturing procedures. Further, in the image pickup lens of the present invention, the single lens is formed of a thermosetting resin or an ultraviolet curable resin. By forming a single lens from a thermosetting resin or a uv (uhra Violet) curable resin, in the manufacturing stage of the image sensor module of the present invention, a plurality of single lenses can be formed into a resin to form the lens 154059. .doc •37· 201133037 Array, which in turn allows resurfacing of the camera lens. Further, in the image pickup module of the present invention, the (four) image pickup device is a VGA (Vide (Graphics Array) type) image pickup element. According to the above configuration, the VGA type imaging element can be applied as a solid-state imaging element, whereby an imaging module having good resolution can be realized, and the number of lenses can be reduced, thereby reducing the possibility of manufacturing tolerances. 'This makes it possible to manufacture a simple camera module. Further, the image pickup module of the present invention is characterized in that the size of the pixel of the solid-state image sensor is 2.5 μm or less. According to the above configuration, it is possible to realize an image pickup module that effectively utilizes the image-capturing capability of the image pickup lens of the present invention. Further, by miniaturizing the solid-state imaging device, the imaging lens and the imaging module can be downsized, so that an imaging module such as a digital camera can be realized. Further, the image pickup module of the present invention is characterized in that it does not include a mechanism for adjusting the focus position of the image pickup lens. The image pickup lens of the present invention has a good resolution ability in the periphery of an image formed by imaging an object. Accordingly, the camera module of the present invention does not need to adjust the position of the solid-state imaging device in the optical axis direction with respect to the position of the best image plane, so that the focus position for adjusting the image pickup lens which is previously necessary for the adjustment can be omitted. Agency. Moreover, the manufacturing cost can be reduced by omitting the mechanism of the present invention. Further, the image pickup module of the present invention is characterized in that a lens array having a plurality of the above-mentioned single lenses is prepared on the same surface, and a plurality of J54059.doc are provided on the same surface.

-38-201133037, the sensor array of the solid-state imaging device, wherein each of the single lenses and the solid-state imaging devices are arranged in one-to-one correspondence, and the sensor array is mounted on the lens array, and then facing The combination of the single lens and the solid-state imaging device arranged as described above is divided and manufactured. According to the above configuration, a large number of imaging modules can be manufactured in a short period of time, so that the manufacturing cost of the imaging module can be reduced. The present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention, and embodiments in which the respective technical means disclosed in the respective embodiments are appropriately combined are also included in the technology of the present invention. range. [Industrial Applicability] The present invention can be applied to an imaging lens and an imaging module for the purpose of a digital camera or the like mounted on a portable terminal. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing the configuration of an image pickup lens according to an embodiment of the present invention. Fig. 2 is a cross-sectional view showing the configuration of an image pickup lens according to another embodiment of the present invention. Fig. 3 is a cross-sectional view showing the configuration of an image pickup lens according to still another embodiment of the present invention. Fig. 4 is a cross-sectional view showing the configuration of an image pickup lens according to another embodiment of the present invention. Fig. 5 is a graph showing a defocus MTF (Modulati〇n Transfer Functi〇n) of the image pickup lens shown in Fig. 1. § 154059.doc • 39- 201133037 Fig. 6 is a graph showing the mtf·spatial frequency characteristics of the image pickup lens shown in Fig. 1. Fig. 7 is a graph showing the mtf·image height characteristic of the image pickup lens shown in Fig. 1. Fig. 8 is a graph showing the characteristics of various aberrations of the image pickup lens shown in Fig. 1 respectively. (a) indicates astigmatic aberration, respectively. (b) indicates distortion. Fig. 9 is a view showing a defocus MTF2 curve of the image pickup lens shown in Fig. 2. Fig. 1 is a graph showing the MTF-spatial frequency characteristic of the image pickup lens shown in Fig. 2. Fig. 1 is a graph showing the MTF-image height characteristic of the image pickup lens shown in Fig. 2. Fig. 12 is a graph showing the characteristics of various aberrations of the image pickup lens shown in Fig. 2, and Fig. 12 shows that (a) indicates astigmatic aberrations and (b) indicates sag. Fig. 13 is a graph showing the dispersion of iMTF of the image pickup lens shown in Fig. 3. Fig. 14 is a graph showing the MTF_ spatial frequency characteristics of the image pickup lens 2 shown in Fig. 3. Fig. 15 is a graph showing the MTF image height characteristic of the image pickup lens shown in Fig. 3. Fig. 16 is a graph showing the characteristics of various aberrations of the image pickup lens shown in Fig. 3, in which (a) indicates astigmatic aberration and (b) indicates distortion. Fig. 17 is a graph showing the defocus of the image pickup lens shown in Fig. 4; Fig. 18 is a graph showing the mtf_ spatial frequency characteristics of the image pickup lens shown in Fig. 4. Fig. 19 is a view showing the MTF-image height characteristic curve J54059.doc 201133037 of the image pickup lens shown in Fig. 4. Fig. 20 is a graph showing the characteristics of various aberrations of the image pickup lens shown in Fig. 4, in which (a) indicates astigmatic aberration and (b) indicates distortion. 21(4) to (c) are cross-sectional views showing a method of manufacturing an image pickup module according to an embodiment of the present invention. Fig. 22 is a cross-sectional view showing the configuration of an image pickup module according to an embodiment of the present invention. Figure 23 is a cross-sectional view showing the configuration of an image pickup module according to another embodiment of the present invention. Fig. 24 is a cross-sectional view showing the configuration of an image pickup module according to still another embodiment of the present invention. [Main component symbol description] 1, 100, 200 '300, 400 camera lens 2 aperture stop 3 object 211 lens array 212 array upper mold 213 array lower mold 214 light shielding member (optical) 215, 219 spacer 216 cover glass 217 sensor array 218 sensor (solid-state imaging device) 220 dividing line 154059.doc 41 201133037 231 241 270 ' 280 ' 290 CG dd' d2 e 1, e2, ea, eb f lens side lens barrel camera module protection Center thickness of the cover glass single lens Thickness of the end of the effective aperture of the single lens The thickness of the end face of the single lens toward the image surface side to the image plane The length of the effective aperture of the single lens L La Pdis si S1-S4 single lens optical axis from the image center to the maximum resolution of the image to the image surface distance from the center surface of the single lens s2 single lens center S5 image surface

Sa's position as the center's largest image resolution 154059.doc -42·

Claims (1)

201133037 VII. Patent application scope: It is from the object side toward the image surface side and the single lens is concave toward the image pickup lens. The feature is that the aperture stop and the single lens and the object side concave and convex lens are sequentially provided, and The position of the image at the center of the image formed by imaging the object is maximized, and the position of the towel is set in the direction of the optical axis (the position of the towel (4) is set as the image plane, and satisfies 0.014 &lt;Pdis/f&lt; 〇.〇3 5 (where f: the focal length of the entire imaging lens), and υ.18&lt;d/d2&lt;0.30 (where d: the thickness of the center of the single lens 廑~the degree of the self-aligning image side of the early lens The air conversion from the center of the surface to the image surface is a long-distance relationship, and both the surface facing the object side and the surface facing the image surface side of the single lens are aspherical surfaces. 2. The image of the request item! a lens in which the above-described single lens system is configured to satisfy the relationship of 5.5 &lt;d'/d&lt;0.9 (where d'·· the thickness of the end portion of the effective aperture of the single lens). Lens 'the above single through The thickness of the thinnest portion of the effective aperture of the mirror exceeds 15 〇μιη 〇 4. The imaging lens of claim 1 wherein the focal ratio is less than 3. 5 · The image lens of the request item 其中 wherein the refractive index of the above single lens exceeds 154059 .doc 201133037 1.4 'And the Abbe number exceeds 43. 6. The imaging lens of claim 1 , the wipes, the above-mentioned early lens contains a thermosetting resin or an ultraviolet curable resin. 7· A camera module, its characteristics In addition, the imaging lens includes an aperture stop and an early lens from the object side toward the image surface side, and the single lens is a concave-convex lens whose concave surface faces the object side, and the center of the image formed by imaging the object When the resolution is the largest position, the moving distance is in the direction of the optical axis (the position is set to the above image surface, and satisfies 〇.014&lt;Pdis/f&lt;〇.〇35 (where f: the entire lens of the imaging lens) The relationship between the focal length and 〇.18&lt;d/d2&lt;0.30 (where d: the thickness of the center of the single lens, and d2: the air conversion from the center of the face toward the image side in the single lens to the image plane) And the relationship between the surface of the single lens facing the object side and the surface facing the image surface side is an aspherical surface; and the solid-state imaging element uses an image formed by imaging the object by the imaging lens as light. 8. The camera module of claim 7, wherein the solid-state imaging device is a video graphic Array (VGA) type of imaging element 0 154059.doc 201133037 9. 10. 11. The pixel of the above solid-state imaging device does not have the size of the image sensor module for adjusting the above-mentioned imaging, such as the request item 7, which is 2.5 μm or less. The mechanism camera module of the focus position of the camera module lens of claim 7 is prepared by the lens array having the plurality of the early lenses on the same surface and the plurality of solid imaging elements on the same surface The sensor array is configured such that the single lens and the solid-state imaging device are disposed in a pair with each of the solid-state imaging devices in a paired manner, and the sensor array is mounted on the lens array. The combination is divided into manufacturers. 154059.doc