TWM283186U - Zoom lens system - Google Patents

Description

M283186

[Technical field to which the new type belongs] This type of creative creation involves a zoom lens combination, especially a zoom lens group used in portable electronic products such as mobile phones. [Previous technology] ^ In recent years, simple digital cameras with photo or video functions Camera, mobile, Π, and personal digital assistants (PerSonai Digital Assistant, Jane: and other portable electronic devices are becoming more and more widely used. However, due to the limitation of their own thickness, these internal image module electronic devices are often required. The total length of the lens combination whose f 柘 π is sought is as short as possible, and the structure is as simple as possible = ΤΟ20, U.S. Patent No. 6,545,82 published on April 8, 2003 ^ A three-group type Negative positive positive lens combination. The three groups of the lens combination are composed of a plurality of lenses, the structure of which is complicated, resulting in a large t length of the lens group Ό, so it is not suitable for application to ^ 隹 and the second lens group moves back and forth to It can achieve the focus function without realizing the two functions, so the lens combination cannot change the visual distance and take advantage of flexible framing when taking pictures. 浐 & West 71: May 10, 2005 National Patent No. 6,891,6, can not be a four-group positive-negative positive-positive lens combination. This lens = continuously moving the second and third groups to achieve the zoom function, continuous by the other two lenses of the group Move the mirror of the front and back lenses to achieve the focusing function. This type of continuous zooming method requires complex control = structure, so the lens with the lens combination has a relatively large volume and a complicated structure, so this lens combination is not suitable. For application to portable M283186

Electronics. The zoom lens has become a problem, so how to provide an urgent problem that can overcome the above problems. [New content]

The purpose of this creation is to provide 'a first lens group with a negative refractive power and a fourth lens group with a negative refractive power in this order. Among them, the first lens group is composed of a single lens body and the fourth lens group is fixed; the second lens group is located at the wide-angle position and the lens and the zoom lens combination are located at the wide-angle position. A lens group, a third lens group having a positive refractive power, and a lens group having a positive refractive power, and a third lens group are fourth. During the zooming process, the first lens group, the second lens group, and the third lens group move forward and backward for zooming and focusing, and one of the second far positions. As described above, since the first lens group and the second lens group and the fourth lens group of the creative zoom lens combination are all composed of a single lens body, when zooming, the first lens group and the fourth lens of the zoom lens combination The fixed length of the group fixed zoom lens combination is fixed, and the second lens group is in a wide-angle position or a telephoto position, so the combination structure of the zoom lens is simple and the total length is short. _ [Embodiment] In order to explain the technical content of this creation, the purpose and effect achieved in detail, the following examples are given in conjunction with the drawings to explain in detail. Please refer to the first and second figures, which disclose the first embodiment of the zoom lens assembly 100 of the present invention. In this embodiment, from the object side, the zoom lens assembly 100 includes a first lens group 110 having a negative refractive power, and

M283186 Creative instructions (3) The second lens group with positive refractive power, 20, the third lens group with negative refractive power, 130, and the fourth lens group with positive refractive power, 14. . The first lens group 110 is composed of a single lens body (a cemented lens, a compound lens j single lens). In this embodiment, it is composed of a biconcave negative lens π 1. In order to reduce the chromatic aberration of the lens combination, the double concave negative lens m 2 Abbe number is preferably greater than 50. In addition, in order to reduce the aberration of the lens combination 10 (), the refraction surface facing the object side of the biconcave negative lens 111 is spherical, and the refraction surface facing the image side is aspheric. : (X ~. Μ4 + city 6+ sister 8+ 尨. Furnace. + Extinguish 12 (1) where 'c represents the curvature at the vertex of the aspheric refraction surface, and S represents the coordinate from the non-I, refraction surface to the optical axis The distance κ represents the conic coefficient, ~, II \ and A1 () represent aspheric coefficients, and χ represents the tangent plane from the coordinate point of the non-distance 2 refractive surface with a distance s from the optical axis to the vertex of the aspherical refractive surface. The second lens group 120 includes three lenses, which are a biconvex positive lens, a convex and concave negative lens 122, and a convex and concave negative lens 123. The projection surfaces of the convex and concave negative lens 123 are all aspheric. The formula (1) is expressed. The material of the t-lens 12i and the concave-convex negative lens 122 is vermiculite glass. This 钫 2 lens group 12 〇 also includes an aperture stop (not shown in the figure), = South diameter stop attached The second lens group 120 is fixed on the refractive surface of the biconvex positive lens 121 toward the object side so as to be integrated with the second lens group 120. Lens group 120-- with the second lens group 130 by a line 131 composed of a negative lens irregularities, the irregularities

Page 7 M283186 IV. Creative Instructions (4) Both refractive surfaces of the negative lens 1 3 1 are aspheric, and these aspheric surfaces are also represented by the aforementioned formula (1). The fourth lens group 140 is composed of a biconvex positive lens 141, which is used to change the telecentricity of the lens combination 1000, and the biconvex positive lens 141 is fixed to protect the image. sensor. — The following describes the zooming process of the zoom lens group and the zoom lens combined with the first and second images. The first lens group 110 and the fourth lens group 140 are fixed, and the second lens group 120 and the third lens group 30 are moved to respectively zoom and focus the zoom lens combination 100 °. During the above-mentioned zooming process, the second lens group 120 is moved from one position to another to change the focal length of the zoom lens combination 100 to achieve the zoom function of the zoom lens combination 100. The lens group 130 moves to a corresponding position to focus the zoom lens combination 100, thereby achieving the focusing function of the zoom lens combination 100. Therefore, this zoom method is different from the continuous zoom method, and can only select the zoom position discretely to achieve a segmented zoom, thereby reducing the zoom and focus control structure of the zoom lens combination 〇〇 and reducing the zoom. The volume of the lens assembly makes the zoom lens assembly 100 suitable for application to portable electronic devices. • In this embodiment, the first position is the wide-angle end, and the second position is the telephoto end. When the second lens group 120 is in a wide-angle position, as shown in the first figure, the second lens group 120 and the third lens group 13 are close to the fourth lens group 415; when the second lens group 120 is in the photo In the far position, as shown in the second figure, the second lens group 120 and the third lens group 130 are close to the first lens group 110, and relative to the first position, the second lens group 120 and the third lens group 13 °. The distance between them becomes larger.

M283186 Fourth, the creation description (5) 'The specific data related to the first embodiment are listed in Tables 1 and 2, where' R, the radius of curvature, and d2, d2 represent the lens refraction at the first and second positions, respectively The distance between the surface vertices, v represents the Abbe number of the lens, PR (Pupil Radius) represents the pupil radius of the segmented zoom lens 100, and MF (Maximum Field) represents the maximum image field of the segmented zoom lens 100, nd Represents the refractive index of the d-line (λ = 5 8 7 · 6 nm), and the units of d !, d2, and R are nmm " 11.0505 1. 5748 0. 1000 aspheric 3 2. 0 0 0 0 1. 1118 1. 1118 1. 804 46. 5 aperture stop 4 -5.2023 0. 100 0 0. 1000 1. 806 25. 5 5 -3.2432 0. 7420 0. 7420 1.805 25. 5 6 -17.5112 0. 3391 0. 3391 7 2. 9675 0. 6072 0. 6072 1.607 27. 6 Aspheric 8 1.5177 0. 6651 1. 6060 Aspheric 9 -9.0822 0. 8000 0. 8000 1. 525 56. 3 Aspheric Art 10 -50.9269 0.8051 1. 3391 Aspheric 11 26.5590 1. 3548 1. 3548 1. 805 25. 5 12 -8.2526 0.3000 0. 3000 Table two

M283186 IV. Creation instructions (6) Refraction surface K 2 3 9. 0 0 62 7 -17. 1964 8 -0.1246 a4 -4. 05740E-03 -1 · 97602E-02 -6 · 69706E-02 a6 -1 · 50710E -03 -1.22007E-01 -6 · 12734E-02 9 -10 3.67969E -03 9 · 51233E-03 10 -10 -6. 79528E-03 4.30880E-03 Refractive surface V Αι〇2 -1.14035E-04 9.22284 E-06 7 6. 30003E-02-4.58731E-02 8 3. 53452E-02 '9. 1 6573E-03 9-1.95842E-03 1.69337E-04 10 -7.83427E-04 1 · 1 7 297E-04 In this embodiment, the focal length of each lens group is as follows: f1 = -5.9428 f2 = 2.8059 f3 = -21.1167 f4 = 7.8855 where fl is the focal length of the first lens group 110 and f2 is the second lens group 120 F3 represents the focal length of the third lens group 130, and f4 represents the focal length of the fourth lens group 140. The third A-three C diagrams and the fourth A-four C diagrams are various aberration diagrams when the zoom lens combination 100 of this embodiment is in a wide-angle position and a telephoto position, respectively, where the D line (λ = 546 · 0 740nm), F-line (λ = 486 · 1 327nm), and C-line (λ

Page 10 M283186 Fourth, the creation description (7) 6 3 2 · 8 0 0 0 nm) various aberrations explain the optical characteristics of the zoom lens combination 丨 〇〇 s line is a radial astigmatism curve , Τ line is a tangential astigmatism curve. The first to fifth and sixth figures reveal the first embodiment of the zoom lens combination 100 of the present invention. The "native embodiment" is similar to the embodiment shown in the first and second figures. The differences are mainly: The third lens group 30 in this embodiment is composed of a double concave negative lens 131 '. The specific data related to the first embodiment are listed in Tables 3 and 4, and the meanings of the specific parameters are as described in the first embodiment. Table three refractive surface R 1 -4.1496 2 3 4 5 12.0411 2. 0000 -4. 5897 -2.9064 6 -11.7521 7 2. 8700 8 1.4902 9 -7.3170 10 83. 5899 11 58.3954 12 -5.8623 di 0.6000 1.5137 1.0825 0.1000 0-7500 0.3991 0.6000 0. 5859 0.8000 0. 7094 1.4593 0.3000 d2 0.6000 0.1000 1. 08 25 0.1000 0.7500 0.3991 0.6000 1.3036 0.8000 1.4054 1 · 45 93 0.3000 nd V 1.525 56.3 1. 80 4 46. 5 1.80 6 25.5 1.80 5 25 5 1.60 7 27. 6 1.525 56.3 1.80525.5 Aspheric aperture diaphragm Aspheric Aspheric Aspheric Aspheric Aspheric

Page 11 M283186 IV. Creation instructions (8) Table four refractive surfaces K 18.5534 -13.3166 0.047888 A4 1.69078E-03 2.39933E-02 5.95527E-02 eight 6 -1. 1 893 4E-03 -1. 1 946 4E- 01 -8.94148E-02 9 -10 1. 59720E-02 4.12035E-03 10 -10 6. 63994E-04 1.74196E-03 Refraction surface 8 Αι〇2-35367E-04 1. 72931E-04 7 5 96592E-02 -4. 63294E-02 8 5.0 0 83 4 1 E-0 2 -1. 54165E-02 9 -5. 30247E-04 3.38511E-05 10 -5. 73486E-04 1.38850E-04 at In this embodiment, the focal length of each lens group is as follows: fl-2-5.78 f2-2.70 f3 = -12.73 丨 4 = 6 · 62 where fl represents the focal length of the first lens group 110 and f2 represents the second lens group 120 F3 represents the focal length of the third lens group 130 ′, and f4 represents the focal length of the fourth lens group 130. The seventh A-C and eighth A-C are the zoom lens group of this embodiment.

M283186 Fourth, creation instructions (9) and 1 0 0 are various aberration diagrams when they are in a wide-angle position and a telephoto position, respectively. The meaning of each symbol is as described in the first embodiment. To sum up, the zoom lens combination of this creation is constructed by the above disclosure to achieve the stated effect, and the application of this creation meets the requirements of a patent, so an application is made in accordance with the law. However, what is disclosed above is only a preferred embodiment of this creation, and it cannot be used to limit the scope of rights of this creation. As for this creation, other equivalent modifications or changes should be covered by the scope of the patent application in this case.

Page 13 M283186 _Brief description of the drawings / [Brief description of the drawings] The first figure is a cross-sectional view of the first embodiment of the creative zoom lens assembly in a wide-angle position. The second figure is a cross-sectional view of the first embodiment of the creative zoom lens assembly at a telephoto position. • The third A-C picture is the first embodiment of this creative zoom lens combination. • Various aberration diagrams at the wide-angle position. The fourth A-IV (: is a variety of aberration diagrams of the first embodiment of the creative zoom lens combination in a telephoto position. # The fifth diagram is a cross-sectional view of the second embodiment of the creative zoom lens combination in a wide-angle position. The sixth diagram is a cross-sectional view of the second embodiment of the creative zoom lens assembly in a telephoto position. The seventh A to Seven C diagrams are various aberration diagrams of the second embodiment of the creative zoom lens assembly in a wide-angle position. The eighth pictures A-C are the aberration diagrams of the j-th embodiment of the zoom lens assembly in the telephoto position. [Explanation of Symbols of Major Components] Zoom lens assembly 100 First lens group 110 ® Double concave negative lens 11 1. 131 'second lens group 120 biconvex positive lens 121, 141 concave and convex negative lens 122 > 131 convex and concave negative lens 123 third lens group 130' 130, fourth lens group 140

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Claims (1)

M283186 5. Scope of patent application 1. The first and the first type of variable lens-lens three-lens four-lens. Among them, the first single lens body constitutes the third focal point and the condenser lens group to change the position m, starting from the object side, including: Group, the first lens group has a negative refractive power; group, the second lens group has a positive refractive power; group, the third lens group has a negative refractive power; the group '苐 lens group has a positive refractive power; the lens group and the second lens group have a fourth refractive power; The first lens group and the fourth lens group are fixed; the second lens group moves back and forth, and the focus of the zoom lens is combined, wherein the first lens group is only in a wide-angle position and a telephoto 2. The first The third through the object side, the second through, and 4. The third through the two folds I5. The third through the two folds 6. The fourth through the application of the lens group refraction surface, such as the application of the lens group convex and concave, such as the application of the mirror The group shooting surface is the same as the application of the lens group shooting surface described in the first application of the lens group zoom lens combination, which consists of a concave negative lens, the biconcave negative lens facing away from the object side of the refractive surface is aspherical. The zoom lens assembly described in item 1, wherein the refractive surfaces of the lens, the concave-convex negative lens, and the convex-concave negative lens group are all aspheric. The zoom lens combination according to item 1, which is composed of a concave negative lens, and the biconcave negative lens. The zoom lens combination according to item 1, which is composed of a convex negative lens, and the patent scope of the concave-convex negative lens is composed of one piece. The double is spherical, the patent range consists of a double convex positive lens, the two patent scopes consist of a double aspheric patent scope, and the concave aspheric patent range of the zoom lens assembly described in item 1, which consists of a double convex positive lens. Page 15