TWM367338U - Photographing lens and camera apparatus using the same - Google Patents

Description

M367338 V. New description: [New technical field] This creation is about a kind of photographic lens for taking a subject and a photographic device using a photographic lens. x 5 [Prior Art] A small photographic lens for a camera device such as a car camera or a surveillance camera has been known from the past. A photographic element composed of a small-sized and high-pixel CCD or CMOS or the like, or a small photographic lens combined with the photographic element, is also known. Further, as a photographing lens used in such an image pickup apparatus, a photographing lens described in Patent Documents 2, 3, 4, and 5 which is miniaturized by a cemented lens is known. The photographic lens described in Patent Document 1 is a bright fluoroscope having an F number of 2 ’. However, a lens made of a material having a refractive index of more than 19 is used, and the cost is increased. The imaging lens described in Patent Document 2 and Patent Document 4 is a lens formed of an aspherical lens. When the photographic lens is used as, for example, a lens for a vehicle camera or a lens for a surveillance camera, when plastic is used for the lens, the performance change with temperature increases. In addition, when the glass is molded into a lens, the cost is increased. The photographing lens described in Patent Document 3 is a lens having an F number of 2.8 to 4'0, and is too dark as a vehicle-mounted camera or a surveillance camera. Further, the lenses described in Patent Documents 1 to 4 each have a bonded lens, and there is room for improvement in environmental resistance. M367338 The lens described in Patent Document 5 uses a large number of aspherical surfaces, and the -plane in the lens serves as a diffractive optical surface. Therefore, when plastic is used for the lens, the performance change with temperature increases. In addition, the lens towel makes the time-lapse high. Patent Document 1: US Pat. No. 7023628 B1; Patent Document 2: Japanese Patent No. 2599312; Patent Document 3: 曰本特开ΗΗ!! 2%"Bulletin; Patent Document 4: JP-A 2007- Japanese Patent Publication No. 279632; Patent Document 5: Japanese Patent Publication No. 2000-39985. However, this type of camera, which is suitable for use in a vehicle-mounted camera or a surveillance camera, requires, for example, an outdoor car in the car below the equator in the summer or in a cold place in the winter, so that (4) the performance with temperature change is reduced. A small, low-cost roll-through that is excellent in weather resistance and bright (small F number). The problem of the optical performance of a low-photographic lens is that the photographic lens that utilizes the adhesive lens deteriorates or deforms when the adhesive material forming the adhesive layer is kept under a strict environment for a long time. H also considers that in order to make the bonded lens resistant to the use of special processing in a strict environment, there is a problem that the cost rises. The above problem is not limited to the use of a photographic lens using a cemented lens in an environment of a vehicle or a surveillance camera. [New content] 20 M367338 This creation is made in the above-mentioned situation, and its purpose is not to A photographic lens that can improve environmental resistance and a photographic apparatus using the photographic lens, which can reduce the performance of the lens or increase the manufacturing cost. The first photographic lens of the present invention, wherein, from the object side, a front group having a negative power of 5, a light barrier, and a rear group having a positive power; the front group including the concave surface toward the image in order from the object side The absolute value of the radius of curvature of the negative first lens and the object side lens surface is larger than the negative second lens of the image side, the positive third lens; the rear group includes the positive fourth lens from the object side, and the concave surface a negative 苐5 lens in the shape of a f-shape toward the object side, and a positive sixth lens 10; the first lens, the second lens, the fourth lens, and the sixth lens respectively set the Abbe number of the d line 4 (m); the third lens and the fifth lens respectively have an Abbe number of 40 or less for the d line; and the lenses constituting the front group and the rear group are each a single lens. The second photographic lens of the present invention, wherein A front group having a negative power of 15 degrees, a light field, and a rear group having positive powers are sequentially included from the object side; the front group includes, in order from the object side, a negative first lens and a concave surface facing the image side. The absolute value of the radius of curvature of the lens surface of the side is larger than the negative second lens of the image side and has a meniscus shape, a third lens; the rear group includes two positive lenses and one negative lens; the Abbe number of the first lens and the second lens pair _ is 45 to 20, and the Abbe number of the third lens to the d line is It is the following; the Abbe number of the negative transparent constituting the rear group is 25 or less for the d line, and the Abbe number of the positive lens to the d line is set to 45 or more; the lenses constituting the front group and the rear group are set to be single. The distance from the lens surface on the object side of the first lens to the imaging surface of the photographic lens is i8 mm or less. M367338 The third lens is that the absolute value of the radius of curvature of the lens surface on the object side is preferably smaller than that on the image side. Preferably, the two positive lenses constituting the rear group are biconvex. 5 The second lens is preferably a flat-concave lens having a plane facing the object side, or an object side. The absolute value of the radius of curvature of the mirror surface is larger than that of the meniscus lens on the image side. The above-mentioned photographing lens preferably satisfies the conditional expression (1): 0 5 < R10/R9 < 1 〇. Among them, R9 is the one of the lenses constituting the rear group. The radius of curvature of the lens side of the image side of the lens 10 near the object side, and, R 10 is a radius of curvature of a lens surface on the object side of the lens adjacent to the image side of the lens located closest to the object side among the lenses constituting the rear group. The above-described photographing lens preferably satisfies the conditional expression (2): 〇8<| Fl2/fj<15, where f is the focal length of the entire lens system, and fl2 is the combined focal length of the first lens and the second lens. The above-mentioned photographic lens preferably satisfies the conditional expression (3): 1.0<|fl23/f456 |<2.2, where f123 is the composite focal length of the former group, and % is the composite focal length of the latter group. The above-mentioned photographic lens preferably satisfies the conditional expression (4): 5 < L/f < 13 wherein 20 f is the whole The focal length of the lens system, L, is the distance from the lens surface on the object side of the first lens to the imaging surface of the photographic lens. Further, in the calculation of the L value, the distance (back intercept) from the lens surface closest to the image side among the lens faces constituting the photographic lens to the imaging surface of the photographic lens is a value converted by air. M367338 The above photographic lens preferably satisfies the conditional expression (5): 〇 5 < Bf / f < 3 〇. Where f is the focal length of the entire lens system and Bf is the back intercept. Further, the 'back intercept is a distance from the lens surface of the lens surface constituting the photographic lens which is located closest to the image side to the optical axis of the imaging surface of the photographic lens, and has a cover glass between the photographic lens and the imaging surface. Or a variety of filters, etc., Bf uses the value after air conversion. The above photographic lens preferably satisfies the conditional expression (6): 2. 〇 <f45/f<5.2. Where f is the focal length of the entire lens system, and f45 is the combined focal length of the mutually adjacent two lenses located closest to the object side among the lenses constituting the rear group. 10 Preferably, the first to sixth lenses are glass lenses. The photographing apparatus according to any one of claims 1 to 12, and an image pickup element that converts an optical image formed by the photographing lens into an electric signal. According to the first photographic lens and the photographing apparatus of the present invention, the front group 15 having a negative power, the light ray, and the rear group having a positive power are sequentially included from the object side, and the 刖 group includes the concave surface in order from the object side. The absolute value of the radius of curvature of the negative first lens toward the image side and the lens surface of the object side is larger than the negative second lens of the image side, the positive third lens; the rear group includes the positive fourth lens from the object side in order, a negative fifth lens having a meniscus shape with a concave surface facing the object side, and a /, a lens of the positive 20, the first lens, the second lens, the fourth lens, and the sixth lens respectively having an Abbe number of the d line All are set to 40 or more; the third lens and the fifth lens knife are all set to 4 Å or less for the d-line; all the lenses constituting the front group and the rear group are set as single lenses, so the lens performance is not required to be lowered. Or increase the production cost to improve environmental tolerance. M367338 In more detail, according to the first photographic lens and the photographing apparatus of the present invention, the following effects can be obtained. That is, 'all lenses constituting the front group and the rear group are single lenses, and no adhesive lens is used. Therefore, it is not necessary to perform special 5 processing relating to lens bonding, and the occurrence of defects caused by lens bonding also disappears. Therefore, environmental tolerance can be improved without lowering the lens performance or increasing the manufacturing cost. Further, the first lens and the second lens disposed on the object side closest to the object side of the lens system are lenses having a negative refractive power, and it is easy to widen the entire lens system. The first lens is a lens having a concave surface toward the image side, and the second lens is a negative lens 211 having a larger absolute value of the curvature radius toward the object side so as to be able to capture, for example, more than 13 来自. The wide angle of view of the incident light. By setting the Abbe number of the d-line of the first lens and the second lens to 40 or more, 15 can suppress the occurrence of chromatic aberration while widening the lens system. By setting the third lens as a positive lens, the image plane curvature can be corrected well. Further, by setting the Abbe number of the third lens to the d line to 4 〇 or less, the chromatic aberration of the magnification can be corrected well. The fourth lens is set to be positive, the fifth lens is set to a negative lens, the Abbe number of the second fourth lens to the d line is 40 or more, and the Abbe number of the fifth lens to the d line is 40. The following 'so that the axial chromatic aberration and the chromatic aberration of magnification can be well corrected. By setting the fifth lens as a negative meniscus lens having a concave surface toward the object side, the field curvature can be satisfactorily corrected. 9 M367338 The sixth lens is set as a lens with positive power, so that the angle at which the surrounding light is incident on the imaging surface of the photographic lens can be reduced, and a so-called telecentric lens can be obtained. According to the second photographic lens and the photographing apparatus of the present invention, the front group 5 having a negative refractive power, the light barrier, and the rear group having a positive refractive power are sequentially arranged from the object side 5, and the 刖 group is set as the object side. The negative first lens having the concave surface facing the image side and the lens surface of the object side have the absolute value of the radius of curvature larger than the image side, the negative second lens having the meniscus shape, and the positive third lens. It is assumed that two positive lenses and one negative lens are included; the Abbe number of the first lens and the second lens 10 for the d line is 45 or more, and the Abbe number of the third lens to the d line is 25 or less. The Abbe number of the negative lens pairing line of the latter group is set to 25 or less, and the Abbe number of the two positive lenses to the 4-line is set to 45 or more; all the lenses constituting the front group and the rear group are set. It is a single lens; the distance from the lens surface of the object side of the first lens to the image plane of the photographic lens is set to i8 mm & 15, so that environmental resistance can be improved without lowering the lens performance or increasing the manufacturing cost. In more detail, according to the second photographic lens and the photographing apparatus of the present invention, the following effects can be obtained. In other words, all the lenses constituting the front group and the rear group are single lenses, and the bonding lens is not used. Therefore, it is not necessary to perform special processing relating to lens bonding, and the occurrence of defects caused by lens bonding also disappears. Therefore, environmental tolerance can be improved without lowering the lens performance or increasing the manufacturing cost. Further, the lenses constituting the front group and the rear group are each a single lens, and = M367338 can suppress deterioration or deformation caused by physical and chemical stimuli of the joint surface, and environmental resistance can be improved. Further, the first lens L1 and the second lens L2 are provided as lenses having a negative refractive power, and the lens system as a whole is easily widened. The first lens 5 is a lens having a concave surface facing the image side, and the second lens is a negative meniscus lens having a larger absolute value of the curvature radius toward the object side, and can be captured, for example, from over 130. The incident angle of the wide angle of view of the light. The third lens is set as a positive lens, so that the image plane curvature can be corrected well. 10 Configure two positive lenses and one negative lens after the light barrier to correct the image mask and spherical aberration. By setting the Abbe number of the lens having a negative refractive power to the d line in the front group to 45 or more', it is possible to suppress the occurrence of chromatic aberration while widening the lens system. Ί5 The Abbe number of the lens having the positive refractive power in the front group to the d line is set to 25 or less, so that the chromatic aberration of the magnification can be satisfactorily corrected. The Abbe number of the d-line of the lens having the negative refractive power in the latter group is set to 25 or less, and the Abbe number of the d-line of the lens having the negative refractive power in the latter group is set to 45 or more. Thus, the axial chromatic aberration and the magnification 20 chromatic aberration can be well corrected. The distance from the lens surface on the object side of the first lens to the image plane is set to 18 mm or less, so that the lens system can be made small. [Embodiment] M367338 Hereinafter, an embodiment of the present creation will be described with reference to the drawings. Fig. 1 is a cross-sectional view showing a schematic configuration of an embodiment of a photographing lens and a photographing apparatus using the photographing lens. The photographing apparatus 100 shown in the drawing is applied to an in-vehicle camera or the like for photographing the front side, the side 5 side, the rear side, and the like of the automobile. The photographing apparatus 100 includes a photographing element 1 () and a photographing lens 2A composed of a CCD or a CMOS or the like. The photographic lens 20 images the optical image of the subject on the light-emitting surface Jk of the photographic element 1A. The imaging element 1 converts an optical image of a subject imaged on the light-receiving surface Jk by the imaging lens 2 into an electrical signal, and outputs an image signal indicating the optical image. [Basic Structure, Effect, and Effect of the Photographic Lens] First, the first basic structure and the second basic structure, which are two basic configurations of the photographing lens 20, will be described. The photographing lens 2 having the following first basic structure includes, in order from the object side (the arrow_Z direction side in the drawing) along the optical axis 21, the front group G1 having a negative refractive power, the aperture stop, and the positive After the power of the group 〇2. The rigid group G1 includes, in order from the object side, a negative first lens having a meniscus shape having a concave surface toward the image side (the arrow + z direction side in the drawing). [1. The absolute value of the curvature radius of the lens surface on the object side is larger than the image side. The negative second lens ^2, the positive third 20 lens L3. The rear group G2 includes, in order from the object side, a positive fourth lens L4, a negative fifth lens L5 having a meniscus shape having a concave surface toward the object side, and a positive sixth lens L6 〇12 M367338. The Abbe number of the second lens L2, the fourth lens L4, and the sixth lens•L6 knife for the d line is 40 or more, and the Abbe number of the third lens L3 and the fifth lens L5 for the d line is 4〇. the following. The lenses constituting the front group G1 and the rear group G2 are all single lenses. Further, the photographic lens 20 having the following second basic structure includes a front group G1 having a negative refractive power, an aperture diaphragm St, and a rear group G2 having a positive refractive power from the object side. The rigid group G1 includes, in order from the object side, the absolute value of the radius of curvature of the lens surface of the negative first lens L1 and the object side which has a meniscus shape toward the image side, which is larger than the image side. The second lens L2 and the positive third lens L3. The rear group G2 includes two positive lenses and one negative lens. The Abbe number of the first lens L1 and the second lens 1^ is 45 or more, the Abbe number of the third lens L3 to the d line is 25 or less; 15 of the negative lens pair constituting the rear group 〇2 The Abbe number of the d line is 25 or less, and the Abbe number of the above two positive lenses to the d line is 45 or more. • The distance from the lens surface S1 on the object side of the first lens L1 to the imaging surface S16 of the photographic lens 20 is 18 mm or less. The 20-image surface S10' indicating the optical image of the subject is imaged by the photographic lens 20 as described above, and the light-receiving surface of the photographic element 1 〇 is arranged. In addition, the photographic lens 20 may have a flat plate shape such as an infrared cut filter or a cover glass that protects the light receiving surface Jk between the rear group G2 and the imaging element 10 in any of the first and second basic configurations. Optical component 13 M367338 CG1. The optical component CG1 is provided with components selected in accordance with the specifications of the photographing apparatus 100. Further, the symbols S1 to S16 in Fig. 1 indicate the following configurations.

Symbols S1 and S2 are a lens surface on the object side (arrow-Z direction side in the drawing) 5 of the first lens L1 and a lens surface on the image side (arrow + Z direction side in the drawing), and symbols S3 and S4 indicate the second lens L2. The lens surface on the object side and the lens surface on the image side, the symbols S5 and S6 represent the lens surface on the object side of the third lens L3 and the lens surface on the image side, and S7 represents the aperture portion of the aperture stop B, the symbol 38 and still indicate The lens surface on the object side of the fourth lens L4 and the lens surface on the image side, the symbols sl1 and su indicate the lens surface on the object side of the fifth lens L5 and the lens surface on the image side, and the symbols s2 and S13 indicate the fifth. The lens surface on the object side of the lens L5 and the lens surface on the image side, and the symbol S14 and S15 indicate that the lens surface on the object side of the optical member CG1 and the lens surface on the image side symbol S16 indicate the light receiving surface of the image pickup element 1 as described above. The imaging surface of the photographic lens 20 is identical. 15 symbol SU denotes shading disposed on the image side surface of the first lens L1

The plate Sk2 represents a light shielding plate that is not disposed on the image side surface of the second lens L2. Moreover, the symbol 2ω represents the full angle of view of the photographic lens 2〇. In order to satisfy only the first basic structure or the second base, the photographic lens 20 may be any one of the structures. 20 with [the basic structure or the first, the effect] a structure attached to the basic structure, and its 14 M367338 ^ and 'this real wealth lens 2G can only be added to the first basic structure or the second basic structure (10) of the plurality of structures, or two or more combinations added to the plurality of structures of the first basic structure or the second basic structure may be satisfied. .5 Further, the meanings of the respective parameters indicated by the symbols in the conditional expressions (1) to (13) are shown below, and the above conditional expression indicates a configuration additionally added to the basic configuration of the above-described photographic lens. Further, the meaning of the parameters and the like which have been explained is shown below. Lu f. The focal length of the entire lens system, 10 n2: the combined focal length of the first lens and the second lens, Π23. The composite focal length of the front group g 1 , f456 . The composite focal length of the rear group G2, f45. The combined focal length of two adjacent lenses located closest to the object side, 15 R9 : the radius of curvature of the lens side S 9 of the image side of the fourth lens L4 closest to the object side in the rear group G2, • 1110 The radius of curvature of the lens surface si〇 of the object side of the fifth lens L5 adjacent to the image side of the fourth lens L4 located closest to the object side in the rear group, L: from the object side of the first lens L1 The distance from the mirror surface 81 to the image plane S16 of the photographing lens (the light receiving surface Jk of the photographing element 10) (the back intercept portion is empty* gas conversion),

Bf : the back intercept (the distance converted from the lens surface sn of the sixth lens [the image side of the image side to the image surface S16 (the air conversion length)),

Ndl : refractive index of the material constituting the first lens L1 to the d line, 15 M367338

Nd3 : Applicable to the refractive index of the material of the third lens [3 to the d line, ED2 · The effective diameter of the lens surface S2 of the image side of the first lens, IH: Maximum image height, ^ 1 : Suitable for the first lens L1 The Abbe number of the material to the d line, 5 W 2 . The Abbe number of the material applied to the second lens L2 to the d line, ^ 3 : the Abbe number of the material applied to the third lens L3 to the d line, ^ 4: Abbe number of the material applied to the fourth lens ^ to the d line, ^ 5 : Abbe number of the material applied to the fifth lens ^ to the d line, ^ 6 : material pair for the sixth lens " Abbe number of the line, 10 D1 : thickness on the optical axis of the first lens L1 (hereinafter, also referred to as center thickness), D8 : center thickness of the fourth lens L4, D9: fourth lens L4 and fifth lens L5 The interval (air spacing). Π~f6 respectively indicate the focal lengths of the first lens L1 to the sixth lens [6. The third lens L3 is preferably a lenticular lens. The third lens L3 is biconvex shaped. The third lens L3 has a positive large refractive power, and it is easy to correct the chromatic aberration of the image plane curvature and the magnification. Moreover, the third lens L3 is transparent on the object side. The 〇 absolute value of the radius of curvature of the mirror surface S5 is preferably smaller than the absolute value of the radius of curvature of the lens surface S6 on the image side. The third lens L3 is made so that it is easier to bend the image of the parent image. M367338 The two positive lenses in the rear group G2 are preferably lenticular lenses, and the two lenses having the positive refractive power in the rear group G2 are formed into a biconvex lens, so that the telecentricity can be ensured. Preferably, the chromatic aberration is corrected. The lens closest to the object side of the rear group G2, that is, the fourth lens 5 L4 is preferably a lenticular lens. By transmitting the fourth lens L4 in a biconvex shape, it is possible to make the fourth lens L4 have a biconvex shape. Since the fourth lens L4 has a positive large refractive power, the chromatic aberration can be satisfactorily corrected by the combination of the fifth lens L5. Preferably, the lens closest to the image side of the rear group G2, here the sixth lens L6 It is a lenticular lens. By arranging the sixth lens to have a biconvex shape, the sixth lens L6 can have a positive large power from 10, so that good telecentricity can be easily obtained. Further, the sixth lens L6 is preferably such that the absolute value of the curvature radius of the lens surface s 12 on the object side is smaller than the lenticular lens of the lens surface S13 on the image side. In this way, the spherical aberration can be corrected well. The second lens L2 is preferably a concave light having a flat lens surface S3 on the object side or a negative light having an absolute value of a radius of curvature of the lens surface S3 on the object side that is larger than the absolute value of the radius of curvature of the lens surface S4 on the image side. A meniscus lens with a power. By setting the second lens 匕2 as such, the second lens L2 can have a large negative power, which is advantageous for wide-angle. The rear group G2 is a second lens from the lens located closest to the object side, and the fifth lens L5 is preferably a meniscus lens having a concave surface facing the object side. By setting the fifth lens L5 as such, it is possible to satisfactorily correct the image tube curvature. 17 M367338 The lens surface of the image side of the lens closest to the object side in the rear group G2 is here, that is, the radius of curvature R9' of the lens surface S9 of the fourth lens L4 and the slave from the closest object side in the rear group G2. The lens surface which is the second lens, that is, the object side lens of the lens adjacent to the fourth lens L4, that is, the radius of curvature R10 of the lens surface S10 of the fifth lens 5 is preferably satisfied by the conditional expression (1): 0.5 <Rl 〇 / R9 < l. 〇〇 疋 若 若 若 若 若 若 R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R The power of the fifth lens L5 is reduced, and it is difficult to correct chromatic aberration. Further, when the value of R10/R9 is equal to or lower than the lower limit of the conditional expression (丨), R1〇 becomes too small, and processing becomes difficult. Conditional Formula (2): 0.8 < £12/1' 丨 < 1.5 is a formula relating to wide angle and field curvature. When the lens system is configured to satisfy the conditional expression (2), it is possible to suppress the enlargement of the lens and widen the angle, and it is also possible to suppress the curvature of field. When the value of °2/€ is equal to or higher than the upper limit of the conditional expression (2), it is difficult to achieve wide angle without the lens being enlarged. In addition, when the value of £12/5 is equal to or lower than the lower limit of the conditional expression (2), it is easy to achieve wide angle, but the image curvature is increased and it is difficult to obtain a good image. And ' |fl2 / f丨 denotes the absolute value of the value of fi2 / f. (2) Conditional expression (3): 101^23/^4561 (2.2 is an expression relating to wide-angle and field curvature. When the lens system is configured to satisfy the conditional expression (3), it is possible to suppress the enlargement of the lens. In addition, it is possible to suppress the curvature of the image surface. M367338 However, if the value of |fl23/f456| is equal to or higher than the upper limit of the conditional expression (3), it is difficult to achieve wide angle without the lens being enlarged. When the value of '|fl23/f456丨 is equal to or lower than the lower limit of the conditional expression (3), it is difficult to correct the field curvature well. 5 Conditional Formula (4): 5<L/f< 13 is the size and wide angle of the lens system. When the lens system is configured to satisfy the conditional expression (4), it is possible to suppress the enlargement of the lens system and to achieve wide angle. However, if the value of L/f is equal to or higher than the upper limit of the conditional expression (4), In addition, when the value of L/f becomes the lower limit of the conditional expression (4) to 10, it becomes difficult to widen the angle. In order to reduce the size of the lens system, the preferred distance L is 22 mm or less. If the distance L is 18 mm or less, it can be further miniaturized. Further, the distance l is equal to or smaller than 16 mm, and the total viewing angle 2ω of the photographing lens 20 is preferably 130 or more. By setting the I5 full angle of view 2ω to 130 or more, the photographic lens 20 can be provided. It is more suitable for the performance of a car camera or surveillance camera. • Conditional formula (5): 〇.8<Bf/f<3.0 is the formula for the size of the back intercept. The lens system is configured to satisfy the conditional expression (5). The size of the back intercept can be appropriately set. 20 However, if the value of Bf/f is equal to or higher than the upper limit of the conditional expression (5), the lens length of the rear section is too large. Further, if Bf/f is When the value becomes lower than the lower limit of the conditional expression (5), the back intercept becomes too small, and it is difficult to insert a cover glass or various filters between the lens system and the photographic element. 19 M367338 In order to insert a cover between the lens system and the photographic element The value of the back intercept Bf of the glass or various calenders is preferably 2.5 mm or more. Conditional formula (6): 2.0 < f45/f < 5.2 is a formula relating to chromatic aberration and field curvature. The system is configured to satisfy the conditional formula (6), then it can be well When the value of f45/f is equal to or higher than the upper limit of the conditional expression (6), it is difficult to correct the chromatic aberration. Further, if the value of 5/^ is a conditional expression ( 6) below the lower limit, it is difficult to correct the field curvature well. Conditional Formula (7) 0.5 < fl / f2 < 2.5 is a formula 10 relating to coma aberration and distortion. If the lens system is configured to satisfy the conditional expression (7), the coma aberration and distortion can be well corrected. However, if the value of fl / f2 is equal to or higher than the upper limit of the conditional expression (7), it is difficult to properly correct the coma aberration. In addition, if the value of / is equal to or lower than the lower limit of the conditional expression (7), the curvature radius of the lens surface S2 on the image side of the first lens L1 becomes too small, processing becomes difficult, or the optical focus of the first lens L1 Correction of the distortion caused by the excessively large degree of curvature of the surrounding light becomes difficult. Conditional Formula (8): 2.0 <f3/f<4.7 is a formula relating to curvature of field and assembly. When the lens system is configured to satisfy the conditional expression, it is possible to suppress good assemblability while suppressing the curvature of the surface. However, if the value of f3/f is equal to or higher than the upper limit of the conditional expression (8), it is difficult to satisfactorily correct the field curvature. In addition, if the value of the door juice becomes lower than the lower limit of the conditional expression, the power of the third lens L3 becomes too large, and the performance change of 20 M367338 " is increased by the eccentricity, so the allowable amount of manufacturing error and assembly error is reduced. Small, difficult to assemble, and at the same time become the cause of rising costs. • Conditional Formula (9): 2.0<|f6/f|<4.5 is a formula relating to telecentricity and assembly. If the lens system is configured to satisfy the conditional expression (9), good telecentricity and assemblability can be obtained. However, if the value of lf6/f丨 is equal to or higher than the upper limit of the conditional expression (9), the angle at which the surrounding light rays enter the image plane becomes large, and it is difficult to produce a lens having a high telecentricity. Further, when the value of 'right|f6/f丨 is equal to or lower than the lower limit of the conditional expression (9), the refractive power of the sixth lens L6 becomes too large, and the sensitivity to the eccentricity is too sensitive, and assembly of the photographic lens becomes difficult. . The conditional expression (10) . 0.40<Dl/f is an equation regarding the physical strength of the first lens li. When the lens system is configured to satisfy the conditional expression (1), for example, when the photographic lens is applied to an in-vehicle camera or the like, desired impact resistance can be obtained with respect to the first lens [1]. However, when the value of the 01 juice is less than or equal to the lower limit of the conditional expression (10), the first lens is thinned and it is difficult to obtain desired impact resistance. • Conditional Formula (11): 0.80<D8/f<1>80 is an expression relating to the size and assembly of the lens system. When the lens system is configured to satisfy the conditional expression, good 20 assembly can be obtained without the size of the lens system being increased. - However, if the value of D8/f is equal to or higher than the upper limit of the conditional expression (丨丨), the lens closest to the object side of the rear group is increased in size, that is, the fourth lens L4 is large, and it is difficult to achieve miniaturization. Further, if the value of D8/f becomes the lower limit of the conditional expression (1 1} to 21 M367338, the lens closest to the object side of the rear group becomes too thin, and it is difficult to secure the edge (8). Difficulty _. Conditional formula (12): 〇.i〇<D9/f<i.00 is a formula relating to the size and chromatic aberration of the lens system and light vignetting. If the lens system is configured to satisfy the condition In the formula (12), the chromatic aberration can be corrected without increasing the size of the lens system or vignetting. However, if the value of D9/f is equal to or higher than the upper limit of the conditional expression (丨2), the latter group is the most The interval between the fourth lens L4 on the object side and the second lens L5 from the object side increases, and the lens system is enlarged, and it is difficult to correct the color 10 aberration. Further, if the value of D9/f becomes When the lower limit of the conditional expression (12) is equal to or less, the interval between the fourth lens L4 closest to the object side of the rear group and the second lens L5 from the object side becomes too small, and the fourth lens and the fifth lens are made too small. Contact at the edge is prone to lens debris, etc., or vignetting occurs when light is incident from the periphery when the spacer ring is placed. (13): 2. 〇 <f6/IH<4_0 is a formula relating to telecentricity and assemblability. If the lens system is configured to satisfy the conditional expression (13), good telecentricity and assembly can be obtained. However, if the value of f6/IH is equal to or higher than the upper limit of the conditional expression (13), the incident angle of the light incident from the periphery to the imaging surface is increased, and it is difficult to produce a lens having a high telecentricity of 20. For example, if f6/IH When the value is less than or equal to the lower limit of the conditional expression (13), the refractive power of the sixth lens L6 is excessively large, and the change due to eccentricity is increased. Therefore, the allowable amount of manufacturing error and assembly error is reduced, and assembly is difficult. It is the reason for the increase in cost. 22 M367338 All the lenses constituting the front group G1 and the rear group G2 are preferably glass lenses. Thus, 'all the lenses constituting the front group and the rear group are made into glass lenses' so that they are in a strict environment. In the case of using a lens system, focus shift can also be suppressed. 5 When the photographic lens of the present embodiment is applied to, for example, an photographic lens of an in-vehicle camera or a surveillance camera, the photographic lens is used over a wide temperature range. Therefore, the material constituting the lens system is preferably glass. The refractive index Nd of the material constituting the first lens L1 for the d line is preferably 1.7 or more. 10 If the refractive index Ν < Π is less than 1.7, in order to make the first lens L1 The processing of the concave shape which deepens the rear surface of the first lens Li, that is, the lens surface 82, with large refractive power becomes difficult, and distortion such as image reduction of the peripheral portion occurs. The lens material constituting the second lens L3 The refractive index Nd3 of the d line is preferably 1.8 or more. 15 The refractive index of the lens material constituting the third lens L3 on the d line is transmitted.

Since Nd3 is 1.8 or more, it is easy to increase the power of the third lens, and as the lens material, a material having a small Abbe number can be selected, which is advantageous for correcting the chromatic aberration of magnification. In addition, it is easy to ensure the edge of the third lens. The Abbe number of the lens material applied to the third lens L3 to the d line is preferably 40 or less. By making the Abbe number ^ 3 of the lens material applied to the third lens L3 to the d line 40 or less, the chromatic aberration of the magnification can be satisfactorily corrected. By making the Abbe number P 3 of the lens material applied to the third lens B 3 to the d line 25 or less, the chromatic aberration of the magnification can be corrected more satisfactorily. 23 M367338 It is preferable that the second lens from the object side of the rear group G2, that is, the refractive index Nd5 of the lens material of the fifth lens L5 to the d line is 1.8 or more. The Abbe number υ 1 of the lens material applied to the first lens L1 to the d line is preferably 75 or less. 5 If the Abbe number of the lens material exceeds 75, the material cost will increase and it is difficult to provide the lens system at a low price. Further, the Abbe number of the lens material of the first lens L1 may be 70 or less. The Abbe's number y 2 of the lens material applied to the first lens L2 to the d line is preferably 75 or less. If the Abbe number of the lens material exceeds 75, the material cost will increase, and it is difficult to provide the lens system at low cost. Moreover, the Abbe number 2^2 of the lens material may be the following. The lens closest to the object side of the rear group G2, and the lens material of the fourth lens 15 L4, the Abbe number u 4 of the d line is preferably 75 or less. If the Abbe number of the lens material exceeds 75, the material cost will increase, and it is difficult to provide the lens system at low cost. And the Abbe number of the lens material. 4 may be the following lens suitable for the image side of the rear group G2, and the Abbe number υ 6 of the lens material of the sixth lens 20 L6 to the d line is preferably 75 q γ if the Abbe number of the lens material When V 6 exceeds 75, the material cost increases, and it is difficult to provide the lens system at a low price. Further, the Abbe number of the lens material is 6 or less and 24 M367338. When the photographic lens 20 is used in a strict environment such as a vehicle-mounted camera, the first lens li disposed on the closest object side is preferably used. Resistance to surface deterioration caused by wind and rain, temperature changes caused by direct sunlight, and chemicals against chemicals such as grease and knee-washing agents, that is, materials with high water resistance, weatherability, acid resistance, and chemical resistance. . Further, the first lens u disposed on the object side is preferably a hard, non-fragile material. According to the above, it is preferable to specifically use the glass item in the first lens L1, or to use a transparent ceramic. Pottery has the property of being stronger than usual glass and having high heat. Further, the center thickness D1 of the first lens L1 is preferably 〇.8 mm or more. By setting the center thickness D1 of the first lens L1 to 〇8 or more, the first lens L1 can be made non-fragile. Further, when the photographic lens 2 〇 is applied to a vehicle-mounted camera as described above, it is required to use, for example, a wide temperature range of the interior 15 of the summer in a cold place to the tropical place. When used in a wide temperature range, the material of the lens is preferably a linear expansion system or a small number of materials. When it is required to be used in a car camera or the like, or when it is used in a wide temperature range, it is preferable to use all the lenses as glass lenses. Further, a waterproof structure may be applied to the first lens to block the ingress and egress of air or moisture from the outside of the outside, in order to prevent fog from being generated internally by a sharp temperature change or humidity change. As the waterproof structure, the first lens Li and the lens frame accommodating the first lens L1 may be bonded together as a sealing structure, or a ring may be placed between the first lens L1 and the lens frame as a sealing structure. 25 M367338 In addition, when the lens system is used in a harsh temperature environment or a humidity environment, the lens system preferably does not use a cemented lens (also called a cemented lens). The photographic lens of the present invention can be constructed such that all lenses are single lenses, and a structure in which an adhesive lens is not used in the entire system. In addition, in order to provide a low cost photographic lens, all lenses are preferably spherical lenses. Alternatively, an aspherical lens may be used in order to correct the aberration more satisfactorily in order to pay attention to performance. Further, in order to form the aspherical surface with high precision and at low cost, plastic can be used as the lens material. Moreover, the light beam passing outside the effective diameter between the lenses becomes a stray light, and the light reaches the image forming surface, and ghosting may occur. Therefore, a light shielding mechanism for shielding the stray light is preferably provided as needed. As the light-shielding means, for example, an opaque paint or an opaque plate material (for example, the light-shielding plates Sk1, Sk2 shown in Fig. 1) may be applied to a portion other than the effective diameter of the image side of the lens. Alternatively, an opaque plate may be provided as an optical path in the optical path of the beam of the stray light. Alternatively, a mechanism such as a cover that blocks stray light is provided on the object side of the lens closest to the object side. As an example, the lens surface S2 on the image side of the first lens L1 and the lens surface S4 on the image side of the second lens L2 are examples in which the light shielding mechanisms Sk1 and Sk2 are separately provided, but the portion where the light shielding mechanism is provided is shown in FIG. It is not limited to the portion shown in Fig. i, but may be between other lenses or through the mirror. In addition, a light bar that blocks peripheral light can be disposed between the lenses. Peripheral light refers to the light that is off-axis and passes through the peripheral portion of the lens system. By blocking the peripheral light in such a manner that the peripheral light amount is practically no problem, the image quality of the peripheral portion of the image plane S16 can be improved 26 M367338*. In addition, the blocking of the peripheral light is the interruption of the ghosting light, which can make the ghost image not obvious. [Specific embodiment] Next, the numerical data of each of the imaging lenses of the embodiment 丨 to the fifth embodiment 8 will be described with reference to Figs. 2 to 17 and the table 丨 to the table 9'. 2 to 9 are cross-sectional views showing schematic configurations of the imaging lenses of the first to eighth embodiments, and the symbols in Figs. 2 to 9 corresponding to the reference numerals in Fig. 1 indicate mutually corresponding configurations. Tables 1 to 9 shown below are tables showing basic data of the imaging lenses of Examples 1 to 8 10, respectively. The left part (indicated by symbol (a) in the figure) of Tables 1 to 8 indicates lens data, and the right part (indicated by symbol (b) in the figure) indicates the photographic lens outline specification. In the lens data of the left part in Tables 1 to 8, the surface number of the optical member such as a lens is set as the first 〇15-1, 2, 3'... which increases sequentially from the object side toward the image side. The face number is indicated. Further, the lens data includes the surface number (i = 7) of the erecting aperture stop St, and the surface side of the object side surface and the image side surface of the parallel plane plate, that is, the optical component cgi (i) =14, 15), the face number of the imaging surface (i=16), etc.

Ri represents the radius of curvature of the first (i = 1 ' 2, 3, ...) plane, and Di (i = 20 1, 2, 3, ...) represents the optical axis 21 of the i-th face and the i-th face On the upper side - separated. Further, the symbol Ri representing the radius of curvature of the lens data corresponds to the symbol Si (i = 1, 2, 3, which represents the lens surface in Fig. 1 . Further, Ndj in the respective lens data indicates the image toward the image from the object side. The side of the jth 丨, 2, 3, ...) optical element is added to the 丄 line (wavelength 27 M367338 587.6nm), and j represents the Abbe number of the jth optical element to the d line. Further, the unit of the radius of curvature and the surface interval is 〇1111, and the radius of curvature is set to be positive for the object side and negative for the image side. The following values are shown in the brief specifications of the right part in Tables 1 to 8. The distance from the lens surface of the object side of the lens L1 to the imaging surface: in the air), the back focus: Bf (in the air), the focal length of the entire lens system (the combined focal length of the first to sixth lenses): f, the focal length of the first lens, flf, the focal length of the second lens: f2, the focal length of the third lens: The focal length of the fourth lens: f4, the focal length of the fifth lens: the focal length of the sixth lens of the heart. The value of f6 is expressed as a brief specification. Moreover, the combined focal length of the first lens and the second lens are respectively: fl2, the combined pupil distance of the fourth lens and the fifth lens: f45, the focal length of the front group: fl23, the focal length of the rear group: (10) the maximum image of the south. IH The value is expressed as a brief specification. Further, in the lower left part of Tables 1 to 9, the values of the coefficients K, A3, A4, and m of the aspherical type indicating each aspherical master = 3 '4...) are shown as a simple specification. Table 9 is a table showing the values of the conditional formula (1) to the parameter in each of the examples 1 to 8. [Table 1] Example 1 (a) Number of lenses 摅 face number Si Ri Di Ndj v di Specification; % _ 1 24.99 1.00 1.7550 52.1 ~~ .M air, 20.49 2 4.42 2.19 3.68 ———-—1 f 2.19 28 M367338

3 oo 0.80 1.583 1 59.4 fl -6.87 4 3.32 1.13 f2 -5.69 5 7.62 2.40 1.9229 20.9 f3 7.39 6 -55.34 2.88 f4 3.80 St 7 OO 0.20 f5 -6.67 8 9.56 2.80 1.7550 52.3 f6 8.16 9 -3.58 0.30 fl2 -2.58 10 -3.04 0.80 1.9229 18.9 f45 7.73 11 -6.78 0.10 fl23 -7.48 12 7.58 2.20 1.7130 53.9 f456 4.57 13 -21.97 2.92 IH 2.4 14 OO 0.40 1.5168 64.2 15 OO 0.50 Imaging surface 16 OO

[Table 2] Example 2 (a) (b)

Lens data plane number Si Ri Di Ndj v dj 1 24.84 1.00 1.7550 52.3 2 4.42 1.81 3 10.45 0.80 1.7550 52.3 4 3.22 2.18 5 9.56 2.40 1.9229 20.9 6 -54.10 2.31 St 7 OO 0.59 8 9.46 2.80 1.7550 52.3 9 -3.60 0.30 10 - 3.04 0.80 1.9229 18.9 11 -7.52 0.10 12 6.88 2.20 1.7130 53.9 13 -28.81 2.84 14 OO 0.40 1.5168 64.2 15 OO 0.50 Imaging surface 16 oo Brief gauge; L (in the air) 20.90 Bf (in the air) 3.60 f 2.16 fl -7.28 f2 -6.48 f3 8.97 f4 3.81 f5 -6.06 f6 8.00 fl2 -2.92 f45 8.46 fl23 -8.95 f456 4.74 IH 2.4 29 M367338 [Table 3] Example 3 (a) (b) Lens data plane number Si Ri Di Ndj v dj 1 16.57 1.00 1.7550 52.3 2 3.22 1.38 3 9.38 0.80 1.7550 52.3 4 2.85 0.81 5 7.17 2.12 1.9229 20.9 6 -20.98 1.66 St 7 〇〇0.20 8 11.14 2.50 1.7550 52.3 9 -2.96 0.40 10 -2.40 1.00 1.9229 18.9 11 -4.81 0.10 12 5.77 2.20 1.7130 53.9 13 -29.80 2.09 14 〇〇0.50 1.5168 64.2 15 oo 0.50 Imaging surface 16 oo Brief specification L (in the air) 17.09 Bf (in the air) 2. 92 f 2.14 fl -5.47 f2 -5.73 f3 6.01 f4 3.36 f5 -6.50 f6 6.96 fl2 -2.39 f45 6.78 fl23 -7.61 f45 6 3.94 IH 2.4

5 [Table 4]

Example 4 (a) (b) Lens data Brief gauge number Si Ri Di Ndj v dj L (in the air) 21.00 1 15.00 1.85 1.7550 52.3 Bf (in the air) 3.77 2 4.48 2.29 f 2.13 3 0.00 0.80 1.7550 52.3 fl - 8.33 4 3.13 0.96 η -4.14 5 6.97 2.40 1.9229 20.9 f3 6.63 6 -42.03 2.52 f4 3.75 St 7 OO 0.20 f5 -7.13 8 11.48 2.80 1.7550 52.3 f6 7.75 30 M367338 9 -3.36 0.30 fl2 -2.34 10 -2.87 0.80 1.9229 18.9 f45 7.42 11 -5.78 0.10 fl23 -6.18 12 7.27 2.20 1.7130 53.9 f456 4.33 13 -16.60 3.01 IH 2.4 14 〇〇0.40 1.5168 64.2 15 〇〇0.50 Imaging surface 1 6 〇〇[Table 5] Example 5

Lens data surface number S i Ri Di Ndj v dj 1 15.00 1.91 1.8348 42.7 2 4.69 2.51 3 -67.69 0.88 1.7550 52.3 4 3.63 1.77 5 9.45 2.40 1.8467 23.8 6 -17.30 2.97 St 7 〇〇1.17 8 13.16 2.80 1.7550 52.3 9 -3.80 0.30 10 -3.33 0.80 1.9229 18.9 11 -8.33 0.10 12 6.78 2.20 1.6779 55.3 13 -23.50 3.34 14 〇〇0.40 1.5168 64.2 15 oo 0.50 Imaging surface 1 6 oo Brief gauge 4 L (in the air) 23.92 Bf (in the air) 4.10 f 2.13 fl -8.94 f2 -4.54 f3 7.53 f4 4.21 f5 -6.52 f6 8.00 fl2 -2.54 f45 10.17 fl23 -9.53 f456 5.06 IH 2.4 [Table 6] Example 6 (a) (b) Lens data Brief specification 31 M367338 Face number Si Ri Di Ndj v dj L (in the air) 15.30 1 14.20 0.09 1.7725 49.6 Bf (in air) 2.63 2 2.97 1.21 f 2.13 3 6.82 0.90 1.7880 47.4 fl -5.04 4 2.43 0.72 f2 -5.27 5 5.32 1.70 1.9229 20.9 f3 5.36 6 - 60.61 1.25 f4 2.94 St 7 oo 0.20 f5 -6.16 8 8.06 2.20 1.7550 52.3 f6 7.04 9 -2.71 0.40 fl2 -2.17 10 -2.13 1.00 1.9229 18.9 f45 5.57 11 -4.16 0.10 fl23 -6.20 12 5.61 2.10 1.7130 53.9 f456 3.6 13 -40.34 1.80 IH 2.4 14 OO 0.50 1.5168 64.2 15 OO 0.50 Imaging surface 16 oo [Table 7] Example 7 (a) Lens data surface number Si Ri Di Ndj v dj 1 23.54 1.00 1.7725 49.6 2 3.31 1.64 3 18.12 0.90 1.7880 47.4 4 3.57 0.08 5 9.37 2.10 1.9229 20.9 6 -17.44 2.26 St 7 OO 0.53 8 21.28 2.45 1.7550 52.3 9 -3.38 0.44 10 -2.75 1.00 1.9229 18.9 11 -5.39 0.10 12 10.84 2.20 1.7130 53.9 13 -9.17 3.72 14 OO 0.50 1.5168 64.2 (b) Brief specification L (in air) 19.97 Bf (in air) 4.55 f 2.14 fl -5.10 f2 -5.79 f3 6.86 f4 4.04 f5 -7.41 f6 7.30 fl2 -2.26 f4 5 8.93 fl23 -6.04 f456 4.61 IH 2.4 32 M367338 15 〇〇0.50 Imaging surface 16 〇〇 [Table 8] Example 8 (a) (b) Lens data surface number Si Ri Di Ndj v dj 1 18.46 1.00 1.7725 49.6 2 2.97 1.27 3 8.21 0.90 1.7880 47.4 4 2.79 0.69 5 5.93 1.70 1.9229 20.9 6 -42.79 1.52 St 7 〇〇0.20 8 17.16 2.20 1.7550 52.3 9 -2.82 0.40 10 -2.27 1.00 1.9229 18.9 11 -4.29 0 .10 12 8.91 2.10 1.7130 53.9 13 -8.91 2.84 14 〇〇 0.50 1.5168 64.2 15 oo 0.50 Imaging surface 16 oo

Brief specification L (in air) 16.75 Bf (in air) 3.67 f 2.14 fl -4.71 f2 -5.77 f3 5.74 f4 3.37 f5 -6.85 f6 6.57 fl2 -2.18 f45 6.99 fl23 -5.89 f456 3.91 IH 2.4 [Table 9] Article name h Equation (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (il) (12) (13) R10/ R9 |f!2/ f丨|fl23 / f456| L/f Bf/f f4 5/f |fl/ f2| f3/f f6/f Dl/f D8/f D9/f f6/ IH Example 1 0.85 1.18 1.64 9.37 1.68 3.53 1.21 3.38 3.73 0.46 1.28 0.14 3.40 Example 2 0.84 1.35 1.89 9.67 1.67 3.91 1.12 4.15 3.70 0.46 1.30 0.14 3.33 Example 3 0.81 1.12 1.93 8.00 1.37 3.17 0.96 2.81 3.26 0.47 1.17 0.19 2.90 Implementation 0.85 1.10 1.43 9.85 1.77 3.48 2.01 3.11 3.64 0.8 7 1.31 0.14 3.23 33 M367338 Example 4 Example 5 0.88 1.20 1.88 11.25 1.93 4.79 1.97 3.54 3.76 0.90 1.32 0.14 3.33 Example 6 0.79 1.02 1.72 7.19 1.24 2.62 0.96 2.52 3.31 0.42 1.03 0.19 2.93 Example 7 0.81 1.06 1.31 9.34 2.13 4.17 0.88 3.21 3.41 0.47 1.15 0.21 3.04 Example 8 0.80 1.02 1.51 7.82 1.71 3.26 0.82 2.68 3.07 0.47 1.03 0.19 2.74 MAX 0.88 1.35 1.93 11 .25 2.13 4.79 2.01 "4.15 3.76 0.90 1.32 0.21 3.40 MIN 0.79 1.02 1.31 7.19 1.24 2.62 0.82 "2.52 3.07 0.42 1.03 0.14 2.74 Upper limit 1.00 1.50 2.20 13.00 3.00 5.20 2.50 4.70 4.50 - 1.80 1.00 4.00 Lower limit 0.50 0.80 1.00 5.00 0.80 2.00 0.50 2.00 2.00 0.40 0.80 0.10 2.00 Figs. 10 to 1 7 are diagrams showing various aberrations of each of the imaging lenses of the first to eighth embodiments. Fig. 10 to Fig. 17 show aberrations of each of the imaging lenses of the respective embodiments for the d line (wavelength: 587.6 nm), the F line (wavelength: 486.1 nm), and the C line (wavelength: 656.3 nm). In addition, the two-dot chain line indicates a sine condition (indicated by the symbol SNC in the figure). 〇 Moreover, the distortion map uses the focal length f of the entire system, the half angle of view 0 (variable processing, 0$<9$ω), and sets the ideal image height to fxtan0, indicating the offset from it. 15 In the aberration diagram, the d line (587.6nm) is indicated by a solid line, called Na1nm), which is indicated by a broken line, and the c line (656.3nm) is indicated by a dotted line. It can be seen that the root lens = the basic data of the first to eighth embodiments and the lens of the material such as the various aberrations are realized by the shape of each lens or the like: without lowering the lens performance or increasing the manufacturing cost, 34 M367338, Further, the present invention is not limited to the above-described embodiments and the respective embodiments, and can be implemented in various modifications. For example, the radius of curvature of each lens component, the value of the surface 2, and the like are not limited to the numerical values shown in the above figures, and may be, for example, a car camera lens and a received optical image. A diagram of a car of a device having a photographic element that is used to form an on-the-job photograph and is converted into an electrical signal output on a light receiving surface. 10

~5〇Γτ ‘The vehicle-mounted equipment for the photographic device of this creation is installed in the car. The vehicle planting equipment is an out-of-vehicle camera for the dead angle range of the side of the (four) two-seat side, and the in-vehicle device ^ photographs the dead (four) surrounding outdoor camera of the rear side of the car 1. In addition: the carrier device 5:4 is an in-vehicle camera that is used to capture the field of view of the driver 4 in the back of the endoscope. ^ 15

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a photographic lens and a photographic view of the present invention. Section of the brief structure

FIG. 2 is a cross-sectional view showing a schematic configuration of an imaging lens in which m is performed. Fig. 3 is a cross-sectional view showing a schematic configuration of an imaging lens of Example 2. 4 is a cross-sectional view showing a schematic configuration of an imaging lens of Example 3. Fig. 5 is a cross-sectional view showing a schematic configuration of an imaging lens of Example 4; Fig. 6 is a cross-sectional view showing a schematic configuration of an imaging lens of Example 5; Fig. 7 is a cross-sectional view showing a schematic configuration of an imaging lens of Example 6; 35 M367338 S4 second lens L2 image side lens surface S5 third lens L3 object side lens surface S6 third lens L3 image side lens surface S7 aperture diaphragm St aperture portion S8 fourth lens L4 Lens surface S9 on the image side S10 on the image side of the fourth lens L4, lens surface S11 on the object side of the fifth lens L5, lens surface S12 on the image side of the fifth lens L5, and lens surface S13 on the object side of the sixth lens L6 The lens surface S14 on the image side of the six lens L6 The lens surface S15 on the object side of the optical member CG1 The lens surface S16 on the image side of the optical member CG1 The imaging surface of the image lens 20

37

Claims (1)

M367338 VI. Patent application scope: 1. A photographic lens, wherein a front group having a negative power, a light column, and a rear group having a positive power are sequentially included from the object side; the front group is sequentially from the object side The negative first lens 5 having the concave surface facing the image side, the absolute value of the radius of curvature of the lens surface on the object side is larger than the negative second lens on the image side, and the positive third lens; the rear group includes from the object side in order a positive fourth lens, a negative fifth lens having a meniscus shape with a concave surface facing the object side, and a positive sixth lens; the first lens, the second lens, the fourth lens, and the sixth lens respectively The Abbe number of the d line is 4 Å or more, and the Abbe numbers of the third lens and the fifth lens for the d line are each 4 Å or less; and the lenses constituting the front group and the rear group are all single lenses. 2. A photographic lens, wherein a front group having a negative power, a light barrier, and a rear group having a positive power are sequentially included from the object side; 15 the front group includes the concave surface toward the image in order from the object side a negative first lens of the side, a lens surface of the object side has an absolute value of a radius of curvature greater than an image side and a negative second lens in a meniscus shape, and a positive third lens; the rear group includes two positive lenses and a negative lens; the Abbe number of the first lens and the first lens to the d line is 45 or more, and the Abbe number of the second lens to the d line is 25 or less; the negative lens constituting the rear group The Abbe number of the d line is 25 or less, the Abbe number of the positive lens to the d line is 45 or more; the lenses constituting the front group and the rear group are both single lenses; and 38 M367338 from the object side of the first lens The distance from the lens surface to the imaging surface of the photographic lens is 18 mm or less. 3. The photographic lens according to claim 1 or 2, wherein the third lens has a lens surface having an absolute value of a radius of curvature of the object side that is smaller than a lenticular lens on the image side. 4. The photographic lens of claim 1 or 2, wherein the two positive lenses constituting the rear group are biconvex. 5. The photographic lens of claim 2, wherein the second lens is a lens having a plano-convex shape with a plane facing the object side, and a radius of curvature of the lens surface of the 10 or the object side. The absolute value is larger than the image lens. 6. If the photographic lens described in the second or second paragraph of the patent application is applied, the following conditional formula (1) is satisfied: 〇.5<Rl〇/R9<l.〇····._ conditions In the equations (1) and 15 ,, R9 is the radius of curvature of the lens surface located on the image side closest to the object side = the lens t constituting the rear group, and is the most sinful of the bucket constituting the rear group. The radius of curvature of the lens surface on the object side of the lens adjacent to the image side of the object side lens. 7· Please ask for the scope of patents! The photographic lens described in the second item or the second item satisfies the following conditional expression (2): /, ο·8,12,1·5.···.. conditional expression (2), : f is the focal length of the entire lens system, and fi2 is the combined focal length of the first lens and the second lens. 39 M367338 8. The photographic lens according to claim 1 or 2, wherein 'the following conditional expression (3) is satisfied: !-〇<|〇23/£456|<2.2... ...conditional formula (3), where 'Π 23 is the combined focal length of the front group, and f456 is the combined focal length of the rear group. 9. The photographic lens according to claim 1 or 2, wherein 'the following conditional expression (4) is satisfied: 5 < L / f < l3 ... conditional expression (4), wherein 'f is the focal length of the entire lens system, and L is the distance from the lens surface on the object side of the first lens to the image plane of the photographic lens. (1) The photographic lens according to the first or second aspect of the invention, wherein the following conditional expression (5) is satisfied: 〇.5 <Bf/f<3. The conditional expression (5), where 'f is the focal length of the entire lens system, and Bf is the rear-wearing distance. 15 U. The photographic lens according to claim 1 or 2, wherein the following conditional expression is satisfied (6) ): 2.0 <f45/f<5.2...conditional expression (6) where 'f is the focal length of the entire lens system' f45 is adjacent to each other in the lens constituting the rear group, which is located closest to the object side The photographic lens of the first lens or the second lens of the invention is the glass lens of the first lens to the sixth lens. A photographing apparatus comprising: the photographing lens according to claim 1 or 2; and M367338 " a photographing element that converts an optical image constituted by the photographing lens into an electric signal. 41