TWM332199U - Five element optical imaging lens - Google Patents

Description

.M332199 (1) The representative representative of the case is: Figure (1). (2) Element symbol of the representative figure Brief description of the taking lens 1 First lens group 2 • • First lens L1 Object side S1 Image side S2 Second lens L2 Second lens group 3 Object side S3 Image side S4 Third lens L3 object side S5 image side surface S6 fourth lens L4 object side surface S7 image side surface S8 fifth lens L5 aperture stop (object) side S8 4 image side surface S9 infrared filter 5 image sensing element 6 object side S10 image side surface S11 Eight, new description: [New technical field] Φ This creation is about a five-lens optical imaging lens, especially for the driving data recording device (EDR, Event Data Recorder) used in the vehicle safety monitoring system. A thin optical image pickup lens comprising five lenses and having a wide angle angle, a small aperture value (Fno), a high resolution, and a small lens total length is provided. [Prior Art] The image taking lens mainly uses one or several lenses or a plurality of lens groups to form an optical path, and then selects an image sensing component such as c(3) (Charge Coupled Device) or CMOS. (" Complementary Metal Oxide, Complementary Metal-Oxide Mutual «Μ332199

Semiconductors are arranged in the same optical axis (〇ptical axis) in order to make a single lens element, two lens groups or lens elements, and three glasses: Or lens elements), or multi-lens (muiti_lens gr〇ups or lens elements) and other types of imaging lenses; when taking images, the light of the object is first imaged through the lens or lens group to the image sensing element In the above, the image sensing component is converted into a signal and transmitted to the relevant supporting device. The general purpose is that an IR cut-off filter is additionally provided before the sensing component is also used in the image sensing component. A coating film is formed on the side of the image of the previous lens to replace (replace) the infrared filter. The above-mentioned image taking lens has been widely used in the current city monitoring system, such as safety monitoring, (4) (10) ^ (EDR, Event Data Recorder) such as digital video recorder (MR, Digital Video Recorder) Image capture lens; However, the image capture lens used in the monitoring system, especially the driving recorder (E(10)), generally has the following disadvantages: its wide-angle angle is generally small, which affects the angle and range of image capture; aperture The value (Fn〇) is large, which affects the brightness and resolution of image capture, especially when the image quality is relatively poor at night; the total length (or twist) and the size of the matching device cannot be used. Effectively shrinking, the lens volume can not be reduced, the production cost, the method is reduced, and the effect of the lens is relatively affected, and the application effect or the product competitiveness. Therefore, the imaging lens used in the monitoring system, especially the vehicle recording device (EDR) There is still room for improvement in the image-taking lens, and this creation is to improve the design for the shortcomings of the above-mentioned conventional imaging lens used in the surveillance camera. . 4 M332199 [New content] The main purpose of this creation is that the FIVE ELEMENT ΟΡΤΙΓΑΤ, tm two five-lens optical imaging mirror UPTICAL imagi from the object side to the image side sequentially. Thirsty) optical axis, * Negative refractive power (abbreviated as negative) first through =, to the image side sequentially includes a negative first lens, a negative second lens, and a positive refractive power (referred to as the image side sequentially included - Orthodox: through the clock, ; =:: the nuclear group 'the side of the object side spear red, a positive fourth lens and a fifth lens; wherein the first and second lens # |

The first face of % R χ has at least one side that is non-spherical. The side of the image of the fourth lens and the side of the positive fifth lens are formed to have a wide angle, such as at least 110. , if circle value factory FnQ), twist, high-resolution five-lens optical image pickup, in order to enhance the application and use of the lens. The present invention aims to provide a five-lens optical imaging lens that satisfies the following optical conditions: 2R2 > R4 >R2; 2 I F12 | < | F34 I ; and • Vdl > Vd2 ^ Vd4 >Vd5; Where R2 and R4 are the curvature radii of the image side and the surface of the negative first lens and the negative second lens, respectively, F12 and F34 are the negative first lens and the negative second lens respectively, and the effective focal length of the mirror, Vdl, Vd2, Vd4 Vd5 is the Abbe number of the first to fifth lenses respectively; thereby, the image capturing lens can effectively reduce the total length of the lens and can be applied at 1/4" (quarter inch) ) or smaller CCD (photocoupled image sensing element,

Charge Coupled Device) or CMOS (Connective Metal-Oxide Semiconductor) sensing element 'relatively reduces the volume of the image taking lens and enhances the applicability of the image taking lens. 5 • M332199 Another object of the present invention is to provide a five-lens optical imaging lens, wherein the image capturing lens can be provided with a center aperture, and the aperture stop is disposed on the first lens group and the second lens. Between the groups, including on the image side of the second lens or on the object side of the third lens or between the two optical surfaces, the use efficiency of the image taking lens is improved. '- Another object of the present invention is to provide a five-lens optical imaging lens, wherein the first lens and the second lens of the image taking lens can be formed by using a plastic lens or a molded glass lens, thereby enhancing the image taking lens. Use efficiency. [Embodiment] In order to make the creation more clear and detailed, the preferred embodiment and the following diagrams are used to describe the structure and technical features of the creation as follows: Referring to Figure 1, it is the first creation. STRUCTURAL STRUCTURE OF THE EMBODIMENT 'The present five-lens optical image taking lens i includes, along the optical axis x, from the object side to the image side sequentially: a negative refractive power (abbreviated as negative) first lens group 2, A negative first lens, a negative second lens L2, and a positive refractive power (abbreviated as positive) second lens group 3 are sequentially included from the object side to the image side, and are sequentially included by the side of the side f image side. a positive third lens L3, a positive fourth lens L4 and a negative fifth lens L5; an infrared filter (IReut-〇ff, f 丨iter) 5, and an image sensing chip, 6 and arranged in the same optical axis (optlcal axis) X as shown in the figure, wherein the first and second lenses L1, L2, light, and surface (S1, S2, S3, At least one side of S4) is aspherical; and the image of the positive fourth lens in the lens group 2 is the same as that of the positive Face (§8) glue; when taking the image, the light emitted by the object passes through the first to fifth lenses U~LW4, and then passes through the infrared filter 5 to image the image sensing element (image sensing6 6 M332199 The above-mentioned five-lens optical imaging lens 1 satisfies the following condition 2R2>R4>R2; and 2 I fl2 | < | f34 I

Vdl>Vd2, Vd4>Vd5; wherein R2 and R4 are the radius of curvature of the image side surfaces S2 and S4 of the negative first lens L1 and the negative second lens L2, respectively, and fi2 and f34 are negative first lenses, respectively. The focal length of the lens L2, Vdl, Vd2, Vd4, Vd5 are the Abbe numbers (Abbe, s, , number) of the first to fifth lenses LI, L2, L3, L4, L5, respectively. The image lens 1 may be provided with a center aperture, such that the aperture stop 4 is disposed between the first lens group 2 and the second lens group 3^, and is disposed above the image side of the second lens L2 or the third lens. The object side of u is stained between the two optical surfaces of the image side surface S4 and the object side surface S5. The optical imaging lens is also used on the image side of the lens before the image sensing element 6, that is, on the image side of the fifth lens 15, and a plating film is formed thereon (instead of) the infrared filter (IR). Cut_〇ff曰fiIter )5° The first optical lens 1 of this creation is read in 々Λ ^ 1 The first lens L1 and the second lens L2 in the transparent group 2 can be selected by using 勉-,# , ... flat ~ state type 胗 或 或 or molded glass lens, and the second rr lens group 3 in the rr 浐 浐 M ^, learned from τ to ... ... 罘 - transparent L3, 罘 four lens L4 and fifth I^L5 is made up of glass lenses. - in the technical field of the imaging lens of the monitoring system, especially for vehicles

As a driving record in the safety monitoring system I D , Λ , ^ 卞 ϋ ϋ 衣 (EDR, Event Data

Recorder ) such as digital video recording n. l D , , ~ Hungry I , Digital Video

Recorder) image capture lens, Beben created the image lens l and the conventional 7 M332199 image capture lens, the creation of the image lens 丨 has a wide angle of angle such as wide angle angle is at least greater than 110. , small aperture value (Fno), high brightness and high resolution, and can effectively reduce the total lens length (TTL), such as the total length of the lens is less than 12mm (mm), so that the creation of the lens} can be applied to 1/4 (a quarter inch) or smaller CCD (Charge Coupled Device) or CMOS (Complementair Metal-Oxide Semiconductor) on the image sensing element, In order to enhance the applicability and use effect of the image capturing lens 1 , the image capturing lens 1 is particularly suitable for use in a vehicle safety monitoring system as an operation recording device (EDR) such as a digital video recording and playback machine (DVR). The image capture lens to improve the efficiency of EDR. The preferred embodiment will be described with reference to the following, in which the optical surface j surface of the object side to the image side is sequentially listed in the table (1) shown in each embodiment, and the optical surfaces on the optical axis are respectively listed. The radius of curvature ((10), unit ram) (wherein the image side surface of the fourth lens L4 is equivalent to the object side surface S8 of the fifth lens L5), and the spacing between the optical surfaces on the optical axis _ (Distance, unit· · _), the refractive index of each lens (Μ), the Abbe number of each mirror (7), the focal length of each lens (such as F12 represents the first through, L1 focal length, F789 represents the fourth, fifth lens glue L4, "Joint focus / distance", the focal length of each lens group (such as Fgl for the first lens group 2 = focal length, 2 for the focal length of the second lens group 3) and the Creator lens 1 The effective focal length EFL (f); in the table of each embodiment (2, the optical surface in which the first lens L1 or the second lens L2 is listed is designed as an aspherical coefficient (CQeffleients), wherein each aspherical surface is composed Use the following formula: 8 • M332199

The form of conic arid asphere surfaces is as follows: Z : ^ 十 Ak4 十; Bh6 十 CM 十 十 EJiU 十 Fli to ten caw ten pull late ten Λ 33 i ten SQRT [ 1 - (1 ten k) eli2] where, z For the sag value, c is the curvature, h is the lens height, K is the conic coefficient (Conic Constant), and A, B, C, D, E, F, and J are 4, 6, 8, 10, 12, 14, and 16 respectively. , 18th and 20th order Aspherical Coefficients <First Embodiment> • Referring to Figures 1-4, which are optical structure diagrams and scattering field diagrams of the first embodiment of the present invention, respectively (Astigmatic field curvature), _distortion, and six different pairs of line pairs in the horizontal axis image height of 0 to 2 · 24 mm, the vertical axis is the resolution (MTF, modulation transfer function). Table 1 )

Surface Raduis Distance Nd Vd S1 R1 13.170 0.70 1.543 55.5 F12=-3.638 Fg 1=-2.527 f=2.294 S2 R2 1.686 0.54 S3 R3 3.733 0.40 1.585 30 F34=-10.99 S4 R4 2.268 0.15 S5 R5 (stop) 9.677 1,69 1.697 55.4 F56=2.424 F〇2=lMl S6 R6 -1.900 0.05 S7 R7 4.5 J 8 1.92 1.697 55.4 F789=8.539 S8 R8 -2.000 0.50 1.847 23.8 S9 R9 -27.377 0.76 S10 〇〇0.30 1.517 64.2 Sll oo 1.00 Image oo 0.00 Table 2 )

Asphere Surface KABCD SI -411.03278 0.01050 S2 1.36376 -0.03758 S3 -15.66895 -0.13456 0.00085 S4 3.66812 -0.16242 -0.00556 It can be seen from Table (1) that the image taking lens of this embodiment satisfies the above formula 9 • M332199 (1), (TTL) 140°; piece constitutes 'constitution. Equation (2) and formula (8mm (mm) and the first instance of the present example), and the total length of the lens is wide angle, the two lenses LI, L2 are made of plastic mirrors, The five lenses L3, L4, and L5 utilize a glass lens <the second embodiment> ί 图 5 5 5 其 其 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学The pair of images has an image height of 〇 to 2·24匪 on the horizontal axis and a resolution (MTF) on the vertical axis. Table 1 )

Surface S1 Rad R] uis Distance —Nd — --- Vd S2 R2 JU· J / I 1.861 u.500 0.717 1.543 55.5 F12=.3.570 Fgl=-2.194 f=2.278 S3 R3 9.888 1.741 1.607 27 F34=-9.780 S4 R4 3.463 0.177 S5 R5 (stop) 6.380 1.954 1.744 44.9 F56=2.781 Fg2=2.097 S6 R6 -2.663 0.196 S7 4.453 2.370 1.696 55.4 F789=9.17S S8 R8 Γ -2.400 0.700 "1.846 23.8 S9 R9 -498.956 0.840 S10 〇〇0.300 1.517 64.1 S11 oo 1.000 linage oo 0.000 AIR — • Table (2)

Asphere Surface k ABCD SI 330.27761 0,00634 -0.00034 S2 0.71282 0.00519 S3 ^181.15144 -0.00771 -0.00606 S4 4.10321 -0.02015 -0.00199 It can be seen from Table (1) that the image taking lens of this embodiment satisfies the above formula (1), formula ( 2) and (3) and other conditions, and the total lens length (TTL) is 10·5_ (mm), and the wide angle is 150. . Further, the first and second lenses 11 and L2 of the present embodiment are formed by a plastic mirror M332199 sheet, and the second, fourth, and fifth lenses L3, L4, and L5 are formed of glass lenses. <Third Embodiment> Referring to Figs. 9-12, respectively, the optical structure diagram, the scattering field curvature diagram, the distortion diagram, and the six different image pairs of the third embodiment of the present invention have an image height of 〇2 on the horizontal axis. · 24mm, vertical axis is the corresponding map of resolution (MTF).

Table 1 )

Surface Rad uis Distance Nd Vd 1 S1 R1 8.720 0.50 1.485 70.1 F12=-3.738 Fgl=-2.422 f=1.933 S2 R2 1.472 1.25 AIR S3 R3 2.243 0.67 1.800 40.8 F34=-13.74 S4 R4 1.615 0.41 S5 R5 (stop) 11.394 1.93 1.697 55.4 F56=2.54 Fg2=1.969 S6 R6 -1.950 0.16 AIR S7 R7 4.549 1.78 1.697 55.4 F789=8.87c S8 R8 -2.000 0.50 1.847 23.8 —S9 R9 -30.882 0.80 AIR S10 oo 0.30 1.517 64.2 S11 oo 0.90 AIR Image oo 0.00 AIR table (2)

Asphere Surface KABCD SI -93.51297 0.00129 0.00004 S2 -0.84112 0.00364 0.00312 S3 -0.94697 -0.01272 -0.02689 S4 0.86575 •0.02960 -0.04753 • As shown in Table (1), the image taking lens of this embodiment satisfies the above formula (1), (2) and (3) and other conditions, and the total lens length (TTL) is 9.2 mm (mm), wide angle is 175 °; and the first and second lenses LI, L2 of this embodiment It is composed of a molded glass lens, and the third, fourth, and fifth lenses L3, L4, and L5 are formed by a glass lens. 11 M332199 <Fourth Embodiment> Referring to Figs. 13-16, respectively, the optical structure diagram, the scattering field curvature diagram, the distortion diagram, and the six different image pairs of the fourth embodiment of the present invention are horizontally 0 to 2.2411111, longitudinal The axis is the corresponding map of the resolution (^17). ' … Table 1 )

Asphei *e Surface KA Β CD S1 229.65535 0.00109 0.00005 S2 -1.01263 Γ〇.02621 0.00654 S3 '14.99646 -0.01753 :0.01521 S4 5.43959 -0.00164 -0.02804 It can be seen from Table (1) that the image taking lens of this embodiment satisfies the above formula fif (1) and (3) and other conditions, and the total length of the lens is 170. ) is 1 〇.5 咖 (mm), the wide angle is (Wide angle) is the first ―, the second lens U, L2 is made of plastic mirror =, and the third, fourth, fifth through m3, L4, L5_M_^ <Fifth Embodiment> Referring to Figs. 17-20, the composition and the scattering field map are respectively the optical knot, the distortion map and the six different image pairs of the fifth embodiment of the present invention. .M332199 0 to 2·24mm, and the vertical axis is the corresponding map of the resolution transfer function (MTF). Table 1 )

Surface Racluis Distance Nd Vd — SI R1 31.5368 0.58 1.543 55.5 S2 R2 1.9734 0.86 F12=-3.903 S3 R3 7.7013 2.03 1.607 27 S4 R4 3.1242 0.37 F34=-10.39 Fgl =-2.29 S5 R5 (stop) 6.3582 2.15 1.744 44.9 S6 R6 - 2.8769 0.98 F56=2.95 f=2.462 S7 R7 4.7313 1.59 1.696 55.4 S8 R8 -2.5846 "0.81 1.846 23.8 Fg2=2.45 S9 R9 186.0000 0.98 F789=10.68 S10 DO 0.30 1.517 64.1 Sll oo 1.34 Image oo 1 _ 0.00 AIR • Table (2 )

Aspher e Surface KABCD SI 114.90755 0.0050821 0.00006 S2 0.55265 -0.0058137 S3 -66.76446 -0.0022212 -0.00377 It can be seen from Table (1) that the image taking lens of the present embodiment satisfies the above formula (1), formula (2) and formula (3), etc. Condition, and the total lens length (TTL) is 12_ (mm), and the wide angle is 110. In addition, the first and second lenses LI and L2 of the present example are constructed using plastic mirrors, and the third, fourth, and fifth lenses (8) are constructed using glass lenses. From the above, and referring to FIGS. 4, 8, 12, 16, _$, 1 at the same time, the resolution of the first to fifth embodiments of the present invention is known (the Μτρ is about 80%, and the wide-angle angle is 14 〇, 15〇, respectively). 175. 170, 110. Therefore, the creation of the lens can be achieved. It is said that the ==== angle of the angle of the operation (at least greater than 1ΠΤ) and the high resolution, and there is a large 13 M332199

However, they will fall within the scope of this new type of protection. BRIEF DESCRIPTION OF THE DRAWINGS An optical structural diagram of an embodiment. A scattering field diagram of an embodiment (Astigmati) 0 is a distortion of an embodiment. Figure 1: This is the first picture of Figure 2: the first field curvature of this creation. Figure 3: The first picture of this creation. Figure 4: This is the first embodiment of the six different image pairs (10LP/mm (sagittal) &gt ; l〇LP/mm (tangential) > 45LP/, nm (sagittal), 45LP/mm (tangential) ^ 90LP/mm (sagittal), 90LP/_ (tangential) in the horizontal axis image height is 0 to 2·24mm Corresponding resolution graph (the vertical axis is the resolution MTF) Fig. 5 is an optical structural diagram of the second embodiment of the present invention. Fig. 6 is an Astigmatic field curvature of the second embodiment of the present invention. Fig. 7 is a distortion diagram of the second embodiment of the present invention. Fig. 8 is a linepair of the second embodiment of the present invention. 10LP/mm (sagittal), 10LP/mm (tangential), 45LP/_ (sagittal), 45LP/mm (tangential), 90LP/min (sagittal), 90LP/mm (tangential) in the horizontal axis image height of 0 to 2·24匪 corresponding resolution map (vertical axis is the resolution MTF ) 14 M332199 Figure 9 is an optical structure diagram of the third embodiment of the present creation. Figure ίο: A scattering field diagram of the third embodiment of the present creation (Astigmatic field curv Figure 11: Distortion diagram (dist〇ri: i〇n) of the third embodiment of the present creation. Fig. 12 is a six different embodiment of the third embodiment of the present invention (lin print air) lOLP/mm ( Sagittal) ^ 10LP/mm (tangential) > 45LP/mm (sagittal) ^ 45LP/mm (tangential) > Call 90LP/mm (sagittal), 90LP/mm (tangential) on the k-axis like 0 to 2. Corresponding resolution diagram of 24 mm (vertical axis is resolution MTF) Fig. 13 is an optical structure diagram of the fourth embodiment of the present creation. Fig. 14 is an astigmatic field curvature of the fourth embodiment of the present creation. Fig. 15 is a distortion diagram of the fourth embodiment of the present creation (dist〇r1: i〇n). 0 16 · Six different pairs of images (1丨nepa丨r) of the four-part embodiment of the creation of the author • lOLP /mra ( sagittal ) > lOLP/ram (tangential) > 45LP/mm ( sagittal ), 45LP/mni ( tangential ), , 90LP/_ (sagittal), 9〇Lp/mra ( tangential) in • horizontal axis image The height is 〇 to the corresponding resolution map of 2.24 mm (the vertical axis is the resolution MTF). Figure Π: The optical structure diagram of the fifth embodiment of the present invention. 0 18 · The scattering field map of the five-part example of this creative brother (am丨g cheats i c field curvature) 〇 Figure 19 · The distortion diagram (dist〇rti〇n) of the fifth embodiment of this creation. 15 M332199 Figure 20 · The six different pairs of line pairs in the fifth embodiment of this creation 10LP/mm (sagittal), 10LP/mm (tangential), 45LP/mm (sagittal), 45LP/mm (tangential), 90LP/ram (sagittal), 90LP/mm (tangential) in the nucleus: the corresponding resolution map of the axis image from the south to the ·24 mm (the vertical axis is the resolution MTF). also

Explanation of main component symbols] Image taking lens 1 First lens group 2 First lens 丄1 Object side S1 Image side S2 Second lens L2 Second lens group 3 Object side S3 Image side S4 Third lens L3 Object side S5 Image side S6 Fourth lens L4 object side S7 image side surface S8 fifth lens L5 object side surface S8 image side surface S9 aperture stop (stop) 4 infrared filter 5 image sensing element 6 object side S10 image side surface S11 16

Claims (1)

M332199 Nine, the scope of application for patents ·· It is arranged along the optical axis and consists of the object side 1 · A five-lens optical imaging lens to the image side sequentially includes: Negative refractive power (abbreviated as negative) lens group, The object side to the image side sequentially include a negative first lens and a negative second lens; πίίί rate (referred to as positive) second lens group, from the object side to the image side: 匕3—positive third lens, one positive a fourth lens and a negative fifth pass: and the image side of the positive fourth lens is an infrared filter of the object side surface of the positive fifth lens; and an image sensing element; wherein 'the following conditions are met · 2R2> ;R4>R2 ; , and Vdl>Vd2 ^ Vd4>Vd5 ΐ!:?, R4 are the image side of the negative first lens and the negative second lens respectively = radius, m, F34 are negative first lens and negative second Transparency = focal length 'Vdl, Vd2, Vd4, respectively, is the Abbe, s number of the first to the first lens. 2·^ΐ ΐ 范围 ΐ ΐ ΐ 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五 五"::: At least one side of the lens side and the image side is aspherical. The patent range is the fifth lens optical imaging lens, which can be set to a center aperture to make it aperture aperture (different - Between the lens group and the second lens group. Further 17 ♦ M332199 5. The five-lens optical imaging lens according to claim 4, wherein the aperture stop is provided in the image of the second lens On the side or on the object side of the third lens or between the image side of the second lens and the object side of the third lens. 6. The five-lens optical imaging lens described in the first paragraph of the patent item 7. If a plastic lens or Molded glass lens constitutes its Plastic lens or molded glass lens structure: The fifth lens optical imaging lens described in the third item is a spherical or aspherical lens. 18