TWI764639B

TWI764639B - Zoom lens

Info

Publication number: TWI764639B
Application number: TW110110506A
Authority: TW
Inventors: 劉權輝
Original assignee: 大陸商廣州立景創新科技有限公司
Priority date: 2021-03-24
Filing date: 2021-03-24
Publication date: 2022-05-11
Also published as: TW202127092A

Abstract

A zoom lens including a first lens group and a second lens group is provided. The first lens group and the second lens group are adapted to move relatively so that the zoom lens zooms between a wide end and a tele end. When the zoom lens is switched from the wide end to a relay position, the first lens group is adapted to move toward an image side. When the zoom lens is switched from the relay position to the tele end, the first lens group is adapted to move toward an object side.

Description

zoom lens

本發明是有關於一種鏡頭，且特別是有關於一種變焦鏡頭。The present invention relates to a lens, and particularly to a zoom lens.

目前的手機鏡頭在進行長焦變倍時需使用多個鏡頭來互相搭配作動以達到期望的倍率，然而，經過變倍的照片會使照片解析度下降，並且隨著鏡頭數量的提升，組裝難度也會隨之提升。The current mobile phone lens needs to use multiple lenses to cooperate with each other to achieve the desired magnification when performing telephoto zooming. However, the zoomed photo will reduce the resolution of the photo, and with the increase of the number of lenses, the assembly is difficult. will also increase.

本發明提供一種變焦鏡頭，具有良好的解析度，且易於組裝。The present invention provides a zoom lens with good resolution and easy assembly.

本發明的變焦鏡頭包括一第一透鏡群以及一第二透鏡群。第一透鏡群包括從一物側往一像側依序排列的一第一透鏡、一第二透鏡、一第三透鏡以及一第四透鏡。第二透鏡群配置於第一透鏡群與像側之間，並包括從物側往像側依序排列的一第五透鏡、一第六透鏡、一第七透鏡以及第八透鏡，其中第一透鏡群與第二透鏡群適於相對移動，以使變焦鏡頭在一廣角端與一望遠端之間變焦，且當變焦鏡頭由廣角端切換至中繼位置時，第一透鏡群適於往像側移動，當變焦鏡頭由中繼位置切換至望遠端時，第一透鏡群適於往物側移動，且變焦鏡頭切換至中繼位置時，變焦鏡頭的變焦倍率為5.7倍。The zoom lens of the present invention includes a first lens group and a second lens group. The first lens group includes a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged from an object side to an image side. The second lens group is disposed between the first lens group and the image side, and includes a fifth lens, a sixth lens, a seventh lens and an eighth lens arranged in sequence from the object side to the image side, wherein the first lens The lens group and the second lens group are suitable for relative movement, so that the zoom lens is zoomed between a wide-angle end and a telephoto end, and when the zoom lens is switched from the wide-angle end to the relay position, the first lens group is suitable for moving the image When the zoom lens is switched from the relay position to the telephoto end, the first lens group is suitable for moving to the object side, and when the zoom lens is switched to the relay position, the zoom magnification of the zoom lens is 5.7 times.

本發明的變焦鏡頭包括一第一透鏡群以及一第二透鏡群。第一透鏡群包括從一物側往一像側依序排列的一第一透鏡、一第二透鏡、一第三透鏡以及一第四透鏡。第二透鏡群配置於第一透鏡群與像側之間，並包括從物側往像側依序排列的一第五透鏡、一第六透鏡、一第七透鏡以及第八透鏡，且變焦鏡頭滿足：5 ＜ T/H ＜ 10；以及0.3＜(D₁₁ *F_w )/(H*F_t ) ＜ 0.9，其中H為變焦鏡頭的最大成像高度，T為變焦鏡頭的總長度，D₁₁ 為第一透鏡的直徑，F_w 為變焦鏡頭切換至一廣角端的等效焦距，F_t 為變焦鏡頭切換至一望遠端的等效焦距。The zoom lens of the present invention includes a first lens group and a second lens group. The first lens group includes a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged from an object side to an image side. The second lens group is disposed between the first lens group and the image side, and includes a fifth lens, a sixth lens, a seventh lens and an eighth lens arranged in sequence from the object side to the image side, and the zoom lens Satisfy: 5 < T/H <10; and 0.3 < (D ₁₁ *F _w )/(H*F _t ) < 0.9, where H is the maximum imaging height of the zoom lens, T is the total length of the zoom lens, and D ₁₁ is the diameter of the first lens, F _w is the equivalent focal length at which the zoom lens is switched to a wide-angle end, and F _t is the equivalent focal length at which the zoom lens is switched to a telephoto end.

在本發明的一實施例中，當上述的變焦鏡頭由廣角端切換至望遠端時，第二透鏡群適於往物側移動。In an embodiment of the present invention, when the aforementioned zoom lens is switched from the wide-angle end to the telephoto end, the second lens group is adapted to move toward the object side.

在本發明的一實施例中，當上述的變焦鏡頭在進行同一倍率的對焦時，第一透鏡群與第二透鏡群之間的距離保持不變。In an embodiment of the present invention, when the aforementioned zoom lens is focusing at the same magnification, the distance between the first lens group and the second lens group remains unchanged.

在本發明的一實施例中，上述的變焦鏡頭滿足：5 ＜ T/H ＜ 10；以及0.3＜(D₁₁ *F_w )/(H*F_t ) ＜ 0.9，其中H為變焦鏡頭的最大成像高度，T為變焦鏡頭的總長度，D₁₁ 為第一透鏡的直徑，F_w 為變焦鏡頭切換至一廣角端的等效焦距，F_t 為變焦鏡頭切換至一望遠端的等效焦距。In an embodiment of the present invention, the above-mentioned zoom lens satisfies: 5 < T/H <10; and 0.3 < (D ₁₁ *F _w )/(H*F _t ) < 0.9, where H is the maximum value of the zoom lens Imaging height, T is the total length of the zoom lens, D ₁₁ is the diameter of the first lens, F _w is the equivalent focal length of the zoom lens when it is switched to a wide-angle end, and F _t is the equivalent focal length of the zoom lens when it is switched to a telephoto end.

在本發明的一實施例中，上述的第一透鏡群與第二透鏡群適於相對移動，以使變焦鏡頭在廣角端與望遠端之間變焦，當變焦鏡頭由廣角端切換至中繼位置時，第一透鏡群適於往像側移動，當變焦鏡頭由中繼位置切換至望遠端時，第一透鏡群適於相對往物側移動，且變焦鏡頭切換至中繼位置時，變焦鏡頭的變焦倍率為5.7倍。In an embodiment of the present invention, the above-mentioned first lens group and second lens group are suitable for relative movement, so that the zoom lens zooms between the wide-angle end and the telephoto end. When the zoom lens is switched from the wide-angle end to the relay position When the zoom lens is switched from the relay position to the telephoto end, the first lens group is adapted to move relative to the object side, and when the zoom lens is switched to the relay position, the zoom lens The zoom magnification is 5.7 times.

在本發明的一實施例中，上述的變焦鏡頭，更包括一光學轉向元件，其中光學轉向元件在變焦鏡頭中的位置維持固定。In an embodiment of the present invention, the above-mentioned zoom lens further includes an optical turning element, wherein the position of the optical turning element in the zoom lens remains fixed.

在本發明的一實施例中，上述的第二透鏡群更包括一孔徑光闌，配置於第一透鏡群與第二透鏡群之間。In an embodiment of the present invention, the above-mentioned second lens group further includes an aperture stop disposed between the first lens group and the second lens group.

在本發明的一實施例中，上述的第一透鏡群具有負屈光度，且第一透鏡、第二透鏡、第三透鏡以及第四透鏡的屈光度分別為正、負、負、正。In an embodiment of the present invention, the first lens group has a negative refractive power, and the refractive powers of the first lens, the second lens, the third lens and the fourth lens are positive, negative, negative, and positive, respectively.

在本發明的一實施例中，上述的第二透鏡群具有正屈光度，且第五透鏡、第六透鏡、第七透鏡以及第八透鏡的屈光度依序為正、負、負、正。In an embodiment of the present invention, the second lens group has a positive refractive power, and the refractive powers of the fifth lens, the sixth lens, the seventh lens and the eighth lens are positive, negative, negative, and positive in sequence.

在本發明的一實施例中，上述的第一透鏡、第二透鏡、第三透鏡、第四透鏡、第五透鏡、第六透鏡、第七透鏡以及第八透鏡中的至少四者為非球面透鏡。In an embodiment of the present invention, at least four of the above-mentioned first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens and eighth lens are aspherical surfaces lens.

基於上述，本發明的變焦鏡頭僅透過相對移動的第一透鏡群與第二透鏡群，就可滿足變焦鏡頭的連續光學變焦的需求，光學配置相對簡單，進而可在維持良好成像品質的前提下，達到易於進行組裝以及控制的優點。Based on the above, the zoom lens of the present invention can meet the requirements of continuous optical zooming of the zoom lens only through the relatively moving first lens group and the second lens group, and the optical configuration is relatively simple, so that good imaging quality can be maintained under the premise of , to achieve the advantages of easy assembly and control.

圖1是本發明一實施例的一種變焦鏡頭的結構示意圖。圖2A至圖2C分別是圖1的變焦鏡頭的焦距為廣角端、中繼位置與望遠端時的示意圖。圖3A與圖3B是本發明一實施例的變焦鏡頭於廣角端時的光學模擬數據圖。圖4A與圖4B是本發明一實施例的變焦鏡頭於望遠端時的光學模擬數據圖。請參照圖1，變焦鏡頭100包括一光學轉向元件PM、一第一透鏡群110以及一第二透鏡群120。第一透鏡群110包括從一物側往一像側依序排列的一第一透鏡111、一第二透鏡112、一第三透鏡113以及一第四透鏡114。並且，第一透鏡群110具有負屈光度，且第一透鏡111、第二透鏡112、第三透鏡113以及第四透鏡114的屈光度分別為正、負、負、正。第二透鏡群120配置於第一透鏡群110與像側之間，並包括從物側往像側依序排列的一孔徑光闌130（Aperture stop）、一第五透鏡121、一第六透鏡122、一第七透鏡123以及第八透鏡124。孔徑光闌130配置於第一透鏡群110與第二透鏡群120之間。並且，第二透鏡群120具有正屈光度，且第五透鏡121、第六透鏡122、第七透鏡123以及第八透鏡124的屈光度依序為正、負、負、正。進一步而言，在本實施例中，第一透鏡111、第二透鏡112、第三透鏡113、第四透鏡114、第五透鏡121、第六透鏡122、第七透鏡123以及第八透鏡124分別為雙凸透鏡、雙凹透鏡、雙凹透鏡、雙凸透鏡、雙凸透鏡、雙凹透鏡、雙凹透鏡、凹面朝向像側的凹凸透鏡。FIG. 1 is a schematic structural diagram of a zoom lens according to an embodiment of the present invention. 2A to 2C are schematic diagrams of the zoom lens of FIG. 1 when the focal lengths are at the wide-angle end, the relay position, and the telephoto end, respectively. 3A and 3B are optical simulation data diagrams of the zoom lens at the wide-angle end according to an embodiment of the present invention. 4A and 4B are optical simulation data diagrams of the zoom lens at the telephoto end according to an embodiment of the present invention. Referring to FIG. 1 , the zoom lens 100 includes an optical turning element PM, a first lens group 110 and a second lens group 120 . The first lens group 110 includes a first lens 111 , a second lens 112 , a third lens 113 and a fourth lens 114 arranged in sequence from an object side to an image side. In addition, the first lens group 110 has a negative refractive power, and the refractive powers of the first lens 111 , the second lens 112 , the third lens 113 and the fourth lens 114 are positive, negative, negative, and positive, respectively. The second lens group 120 is disposed between the first lens group 110 and the image side, and includes an aperture stop 130 (Aperture stop), a fifth lens 121 and a sixth lens arranged in sequence from the object side to the image side 122 , a seventh lens 123 and an eighth lens 124 . The aperture stop 130 is disposed between the first lens group 110 and the second lens group 120 . In addition, the second lens group 120 has a positive refractive power, and the refractive powers of the fifth lens 121 , the sixth lens 122 , the seventh lens 123 and the eighth lens 124 are positive, negative, negative, and positive in sequence. Further, in this embodiment, the first lens 111 , the second lens 112 , the third lens 113 , the fourth lens 114 , the fifth lens 121 , the sixth lens 122 , the seventh lens 123 and the eighth lens 124 are respectively It is a biconvex lens, a biconcave lens, a biconcave lens, a biconvex lens, a biconvex lens, a biconcave lens, a biconcave lens, and a meniscus lens with the concave surface facing the image side.

具體而言，如圖2A至圖2C所示，在本實施例中，光學轉向元件PM在變焦鏡頭100中的位置維持固定，第一透鏡群110與第二透鏡群120適於相對移動，以使變焦鏡頭100在一廣角端與一望遠端之間變焦。在本實施例中，光學轉向元件PM例如為三稜鏡。光學轉向元件PM具有表面SO、表面S101與表面S102，表面S101連接表面SO與表面S102，光學轉向元件PM的表面S102朝向第一透鏡群110。並且，從表面SO入射所述光學轉向元件PM的光束被表面S101反射後，經由表面S102離開光學轉向元件PM。如此，通過光學轉向元件PM的配置，本發明的變焦鏡頭100可改變被攝物所形成的影像光的行進方向，而能使其中的光學元件配置緊湊，進而具有小體積的優點。Specifically, as shown in FIG. 2A to FIG. 2C , in this embodiment, the position of the optical steering element PM in the zoom lens 100 is kept fixed, and the first lens group 110 and the second lens group 120 are adapted to move relatively so as to The zoom lens 100 is zoomed between a wide-angle end and a telephoto end. In the present embodiment, the optical turning element PM is, for example, a triangular element. The optical turning element PM has a surface SO, a surface S101 and a surface S102 , the surface S101 connects the surface SO and the surface S102 , and the surface S102 of the optical turning element PM faces the first lens group 110 . And, the light beam incident on the optical steering element PM from the surface SO is reflected by the surface S101, and then leaves the optical steering element PM via the surface S102. In this way, through the configuration of the optical turning element PM, the zoom lens 100 of the present invention can change the traveling direction of the image light formed by the subject, and can make the optical elements in the zoom lens 100 compact and have the advantage of small volume.

更詳細而言，如圖2A至圖2C所示，在本實施例中，當變焦鏡頭100由廣角端往望遠端切換時，第二透鏡群120適於往物側移動，且當變焦鏡頭100由廣角端往中繼位置切換時，第一透鏡群110適於往像側移動，當變焦鏡頭100由中繼位置往望遠端切換時，第一透鏡群110適於往物側移動。此時變焦鏡頭100的可變間距d1會變大，至中繼位置後再折返而變小，而可變間距d2會持續變小，可變間距d3會持續變大，而變焦鏡頭100的焦距亦會從廣角端依序切換至中繼位置與望遠端。In more detail, as shown in FIGS. 2A to 2C , in this embodiment, when the zoom lens 100 is switched from the wide-angle end to the telephoto end, the second lens group 120 is adapted to move to the object side, and when the zoom lens 100 is switched to the object side When switching from the wide-angle end to the relay position, the first lens group 110 is adapted to move to the image side, and when the zoom lens 100 is switched from the relay position to the telephoto end, the first lens group 110 is adapted to move to the object side. At this time, the variable distance d1 of the zoom lens 100 will become larger, and then return to the relay position to become smaller, while the variable distance d2 will continue to decrease, the variable distance d3 will continue to increase, and the focal length of the zoom lens 100 It will also switch from the wide-angle end to the relay position and the telephoto end in sequence.

舉例而言，在本實施例中，當變焦鏡頭100切換至廣角端時，變焦鏡頭100的變焦倍率為3倍，當變焦鏡頭100切換至中繼位置時，變焦鏡頭100的變焦倍率為5.7倍，當變焦鏡頭100切換至廣角端時，變焦鏡頭100的變焦倍率為8倍。在本實施例中，當變焦鏡頭100在進行同一倍率的對焦時，第一透鏡群110與第二透鏡群120的移動行程會相同，也就是說，當變焦鏡頭100在進行同一倍率的對焦時，第一透鏡群110與第二透鏡群120之間的距離保持不變。For example, in this embodiment, when the zoom lens 100 is switched to the wide-angle end, the zoom magnification of the zoom lens 100 is 3 times, and when the zoom lens 100 is switched to the relay position, the zoom magnification of the zoom lens 100 is 5.7 times , when the zoom lens 100 is switched to the wide-angle end, the zoom magnification of the zoom lens 100 is 8 times. In this embodiment, when the zoom lens 100 is focusing at the same magnification, the moving strokes of the first lens group 110 and the second lens group 120 are the same, that is, when the zoom lens 100 is focusing at the same magnification , the distance between the first lens group 110 and the second lens group 120 remains unchanged.

另一方面，當第一透鏡群110與第二透鏡群120以與上述的作動方式相反的作動方式移動時，變焦鏡頭100就會由望遠端往中繼位置與廣角端切換，此時變焦鏡頭100的可變間距d1會變小，至中繼位置後再折返而變大，而可變間距d2會持續變大，可變間距d3會持續變小，而變焦鏡頭100的焦距亦會從望遠端依序切換至中繼位置與廣角端。On the other hand, when the first lens group 110 and the second lens group 120 move in the opposite operation mode to the above-mentioned operation mode, the zoom lens 100 will switch from the telephoto end to the relay position and the wide-angle end. At this time, the zoom lens The variable spacing d1 of 100 will become smaller, and then return to the relay position and become larger, while the variable spacing d2 will continue to increase, the variable spacing d3 will continue to become smaller, and the focal length of the zoom lens 100 will also increase from the telephoto lens. switch to the relay position and the wide-angle end in sequence.

如此，在本實施例中，由於變焦鏡頭100僅透過相對移動的第一透鏡群110與第二透鏡群120，就可滿足變焦鏡頭100的連續光學變焦的需求，光學配置相對簡單，進而有利於進行組裝。In this way, in this embodiment, since the zoom lens 100 can only pass through the first lens group 110 and the second lens group 120 that move relatively, the continuous optical zooming requirement of the zoom lens 100 can be met, and the optical configuration is relatively simple, which is beneficial to Assemble.

更具體而言，在本實施例中，變焦鏡頭100滿足：5 ＜ T/H ＜ 10；以及0.3＜(D₁₁ *F_w )/(H*F_t ) ＜ 0.9，其中H為變焦鏡頭100的最大成像高度，T為變焦鏡頭100的總長度，D₁₁ 為第一透鏡111的直徑，F_w 為變焦鏡頭100切換至廣角端的等效焦距，F_t 為變焦鏡頭100切換至望遠端的等效焦距。H為像高，也為成像表面上所形成的影像畫面的對角線長。在本實施例中，半像高定義為位於物側的影像感測元件140在其成像表面SI上所形成的影像畫面中距離變焦鏡頭100的光軸O最遠的點至光軸O的距離，而此距離是指在與光軸O垂直的方向上的距離。而在本實施例中，由於影像感測元件140的光軸O與變焦鏡頭100的光軸O重合，因此半像高的兩倍即為成像表面SI上所形成的影像畫面的對角線長。此外，在本實施例中，變焦鏡頭100的總長度例如為35毫米，但本發明不以此為限。More specifically, in the present embodiment, the zoom lens 100 satisfies: 5 < T/H <10; and 0.3 < (D ₁₁ *F _w )/(H*F _t ) < 0.9, where H is the zoom lens 100 , T is the total length of the zoom lens 100, D ₁₁ is the diameter of the first lens 111, F _w is the equivalent focal length of the zoom lens 100 switched to the wide-angle end, F _t is the equivalent focal length of the zoom lens 100 switched to the telephoto end focal length. H is the image height, and is also the diagonal length of the image frame formed on the imaging surface. In this embodiment, the half image height is defined as the distance from the point farthest from the optical axis O of the zoom lens 100 to the optical axis O in the image frame formed by the image sensing element 140 on the object side on the imaging surface SI , and this distance refers to the distance in the direction perpendicular to the optical axis O. In this embodiment, since the optical axis O of the image sensing element 140 is coincident with the optical axis O of the zoom lens 100 , twice the height of the half image is the diagonal length of the image frame formed on the imaging surface SI . In addition, in this embodiment, the total length of the zoom lens 100 is, for example, 35 mm, but the invention is not limited to this.

在上述的變焦鏡頭100中，第一透鏡111、第二透鏡112、第三透鏡113、第四透鏡114、第五透鏡121、第六透鏡122、第七透鏡123以及第八透鏡124中的至少四者為非球面透鏡。在本實施例中，第一透鏡群110的第一透鏡111、第二透鏡112、第三透鏡113、第四透鏡114例如各為一球面透鏡。而第二透鏡群120的第五透鏡121、第六透鏡122、第七透鏡123以及第八透鏡124是非球面透鏡，但本發明不以此為限。並且，第一透鏡111至第八透鏡124的材質例如是玻璃或塑膠，舉例而言，在本實施例中，第一透鏡群110的第一透鏡111、第二透鏡112、第三透鏡113、第四透鏡114為玻璃透鏡，第二透鏡群120的第五透鏡121、第六透鏡122、第七透鏡123以及第八透鏡124為塑膠透鏡，但本發明也不以此為限。In the zoom lens 100 described above, at least one of the first lens 111 , the second lens 112 , the third lens 113 , the fourth lens 114 , the fifth lens 121 , the sixth lens 122 , the seventh lens 123 and the eighth lens 124 The four are aspherical lenses. In this embodiment, each of the first lens 111 , the second lens 112 , the third lens 113 , and the fourth lens 114 of the first lens group 110 is, for example, a spherical lens. The fifth lens 121 , the sixth lens 122 , the seventh lens 123 and the eighth lens 124 of the second lens group 120 are aspherical lenses, but the invention is not limited thereto. In addition, the material of the first lens 111 to the eighth lens 124 is, for example, glass or plastic. For example, in this embodiment, the first lens 111 , the second lens 112 , the third lens 113 , the The fourth lens 114 is a glass lens, and the fifth lens 121 , the sixth lens 122 , the seventh lens 123 and the eighth lens 124 of the second lens group 120 are plastic lenses, but the invention is not limited thereto.

此外，在本實施例中，變焦鏡頭100用於成像時，像側可設置紅外線截止濾鏡（IR Cut Filter）IR以及影像感測元件140，其中表面SI即為影像感測元件140的成像表面。此外，在本實施例中，影像感測元件140例如為電荷耦合元件(charge coupled device, CCD)或互補式金屬氧化物半導體(complementary metal oxide semiconductor, CMOS)影像感測元件。In addition, in this embodiment, when the zoom lens 100 is used for imaging, an infrared cut filter (IR Cut Filter) IR and an image sensing element 140 can be set on the image side, wherein the surface SI is the imaging surface of the image sensing element 140 . . In addition, in the present embodiment, the image sensing element 140 is, for example, a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) image sensing element.

以下內容將舉出變焦鏡頭100的一實施例，然而，下文中所列舉的數據資料並非用以限定本發明，任何所屬領域中具有通常知識者在參照本發明之後，當可對其參數或設定作適當的更動，惟其仍應屬於本發明的範疇內。〈表一〉表面曲率半徑(mm) 間距(mm) 折射率阿貝數備註 SO 無限大無限大 S101 無限大 11.000 光學轉向元件PM S102 無限大可變間距(d1) S103 14.963 1.722 1.517 64.167 第一透鏡111 S104 -24.827 0.362 　　 S105 -651.428 0.500 1.620 60.374 第二透鏡112 S106 9.162 2.203 　　 S107 -7.331 0.913 1.517 64.167 第三透鏡113 S108 11.229 0.226 　　 S109 12.051 1.111 1.673 32.179 第四透鏡114 S110 -1331.759 可變間距(d2) 　　 S111 無限大 0.100 　　孔徑光闌130 S112 5.329 2.842 1.545 55.987 第五透鏡121 S113 -6.460 0.100 　　 S114 -9.470 3.290 1.643 22.456 第六透鏡122 S115 34.736 7.425 　　 S116 71.681 0.599 1.545 55.987 第七透鏡123 S117 8.173 0.201 　　 S118 8.228 0.888 1.643 22.456 第八透鏡124 S119 13.675 可變間距(d3) 　　 S120 無限大 0.210 1.517 64.167 紅外線截止濾鏡IR S121 無限大 0.500 SI 無限大 0.00 影像感測元件140 The following content will illustrate an embodiment of the zoom lens 100, however, the data listed in the following is not intended to limit the present invention, any person with ordinary knowledge in the art can refer to the present invention when the parameters or settings are Appropriate modifications should be made, but they should still fall within the scope of the present invention. <Table I> surface Radius of curvature (mm) Spacing(mm) refractive index Abbe number Remark SO Unlimited Unlimited S101 Unlimited 11.000 Optical steering element PM S102 Unlimited Variable spacing (d1) S103 14.963 1.722 1.517 64.167 first lens 111 S104 -24.827 0.362 S105 -651.428 0.500 1.620 60.374 Second lens 112 S106 9.162 2.203 S107 -7.331 0.913 1.517 64.167 third lens 113 S108 11.229 0.226 S109 12.051 1.111 1.673 32.179 Fourth lens 114 S110 -1331.759 Variable spacing (d2) S111 Unlimited 0.100 Aperture diaphragm 130 S112 5.329 2.842 1.545 55.987 Fifth lens 121 S113 -6.460 0.100 S114 -9.470 3.290 1.643 22.456 Sixth lens 122 S115 34.736 7.425 S116 71.681 0.599 1.545 55.987 Seventh lens 123 S117 8.173 0.201 S118 8.228 0.888 1.643 22.456 Eighth lens 124 S119 13.675 Variable spacing (d3) S120 Unlimited 0.210 1.517 64.167 Infrared cut filter IR S121 Unlimited 0.500 SI Unlimited 0.00 Image sensing element 140

在〈表一〉中，曲率半徑是指每一表面的曲率半徑，間距是指兩相鄰表面間的距離。舉例來說，表面S101的間距，即表面S101至表面S102在光軸O上的距離。備註欄中各透鏡所對應的厚度、折射率與阿貝數請參照同列中各間距、折射率與阿貝數對應的數值。此外，表面S101、S102是光學轉向元件PM的反射面與出光面。表面S103、S104是第一透鏡111的兩表面。表面S105、S106是第二透鏡112的兩表面。表面S107、S108是第三透鏡113的兩表面。表面S109、S110是第四透鏡114的兩表面。孔徑光闌130位於表面S111上。表面S112、S113是第五透鏡121的兩表面。表面S114、S115是第六透鏡122的兩表面，表面S116、S117是第七透鏡123的兩表面。表面S118、S119是第八透鏡124的兩表面。表面S120、S121為紅外線截止濾鏡IR的兩表面。表面SI則為影像感測元件140的成像表面。In <Table 1>, the radius of curvature refers to the radius of curvature of each surface, and the spacing refers to the distance between two adjacent surfaces. For example, the distance between the surfaces S101 is the distance from the surface S101 to the surface S102 on the optical axis O. For the thickness, refractive index and Abbe number corresponding to each lens in the remarks column, please refer to the values corresponding to each pitch, refractive index and Abbe number in the same column. In addition, the surfaces S101 and S102 are the reflection surface and the light-emitting surface of the optical turning element PM. Surfaces S103 and S104 are both surfaces of the first lens 111 . Surfaces S105 and S106 are both surfaces of the second lens 112 . Surfaces S107 and S108 are both surfaces of the third lens 113 . Surfaces S109 and S110 are both surfaces of the fourth lens 114 . The aperture stop 130 is located on the surface S111. Surfaces S112 and S113 are both surfaces of the fifth lens 121 . The surfaces S114 and S115 are the two surfaces of the sixth lens 122 , and the surfaces S116 and S117 are the two surfaces of the seventh lens 123 . Surfaces S118 and S119 are both surfaces of the eighth lens 124 . The surfaces S120 and S121 are the two surfaces of the infrared cut filter IR. The surface SI is the imaging surface of the image sensing element 140 .

承上述，表面S112、S113、S114、S115、S116、S117、S118、S119為非球面，而非球面的公式如下：

其中，Z為光軸O方向的偏移量。R是密切球面(osculating sphere)的半徑，也就是接近光軸O處的曲率半徑。K為圓錐常數(conic constant)。H是非球面高度，即為從透鏡中心往透鏡邊緣的高度，從公式中可得知，不同的H會對應出不同的Z值。A、B、C、D、E、F、G為非球面係數(aspheric coefficient)。表面S112、S113、S114、S115、S116、S117、S118、S119的非球面係數及K值如〈表二〉所示：〈表二〉

表面 K A B C D E F G S112 -7.61E-01 4.72E-04 8.88E-06 1.21E-07 2.84E-08 8.97E-09 5.90E-11 -2.24E-12 S113 0 1.57E-03 7.04E-05 -3.34E-07 -3.66E-08 1.74E-09 -1.88E-10 1.61E-11 S114 0 -3.43E-04 1.12E-04 3.40E-06 -5.28E-07 -2.36E-09 -8.73E-11 3.08E-11 S115 0 -1.65E-05 9.87E-05 7.69E-06 -9.17E-07 5.20E-08 -2.56E-10 -8.13E-12 S116 0 -9.52E-03 7.69E-04 -1.74E-05 5.75E-07 -7.11E-08 -1.11E-08 -2.66E-10 S117 0 -1.02E-02 8.40E-04 6.08E-06 -6.76E-06 8.59E-07 -5.02E-08 8.51E-11 S118 0 -8.07E-04 -2.74E-05 7.94E-05 -2.60E-05 3.63E-06 -2.36E-07 5.76E-09 S119 0 -2.10E-04 1.32E-04 -1.15E-05 -2.63E-06 -2.62E-07 1.16E-07 -7.33E-09

Based on the above, the surfaces S112, S113, S114, S115, S116, S117, S118, and S119 are aspherical, and the aspherical formula is as follows:

Among them, Z is the offset in the direction of the optical axis O. R is the radius of the osculating sphere, that is, the radius of curvature near the optical axis O. K is the conic constant. H is the height of the aspheric surface, which is the height from the center of the lens to the edge of the lens. It can be known from the formula that different H will correspond to different Z values. A, B, C, D, E, F, and G are aspheric coefficients. The aspheric coefficients and K values of surfaces S112, S113, S114, S115, S116, S117, S118, and S119 are shown in <Table 2>: <Table 2>

surface K A B C D E F G S112 -7.61E-01 4.72E-04 8.88E-06 1.21E-07 2.84E-08 8.97E-09 5.90E-11 -2.24E-12

S113

0 1.57E-03 7.04E-05 -3.34E-07 -3.66E-08 1.74E-09 -1.88E-10 1.61E-11 S114 0 -3.43E-04 1.12E-04 3.40E-06 -5.28E-07 -2.36E-09 -8.73E-11 3.08E-11 S115 0 -1.65E-05 9.87E-05 7.69E-06 -9.17E-07 5.20E-08 -2.56E-10 -8.13E-12 S116 0 -9.52E-03 7.69E-04 -1.74E-05 5.75E-07 -7.11E-08 -1.11E-08 -2.66E-10 S117 0 -1.02E-02 8.40E-04 6.08E-06 -6.76E-06 8.59E-07 -5.02E-08 8.51E-11 S118 0 -8.07E-04 -2.74E-05 7.94E-05 -2.60E-05 3.63E-06 -2.36E-07 5.76E-09 S119 0 -2.10E-04 1.32E-04 -1.15E-05 -2.63E-06 -2.62E-07 1.16E-07 -7.33E-09

在〈表三〉中分別列出變焦鏡頭100的焦距為廣角端及望遠端時的一些重要參數值，包括有效焦距、視場角、光圈數及可變間距d1、d2、d3。〈表三〉廣角端中繼位置望遠端有效焦距(mm) 10.51 19.28 28.04 光圈數 3.00 4.25 5.50 視場角(度) 31.6 17.2 11.8 可變間距(mm) d1 2.40 3.56 1.00 d2 8.34 2.42 0.20 d3 2.07 6.84 11.61 Table 3 lists some important parameter values when the focal length of the zoom lens 100 is at the wide-angle end and the telephoto end, including the effective focal length, field of view, aperture number, and variable spacings d1, d2, and d3. <Table 3> wide end relay location telephoto end Effective focal length (mm) 10.51 19.28 28.04 Aperture number 3.00 4.25 5.50 Field of view (degrees) 31.6 17.2 11.8 Variable pitch (mm) d1 2.40 3.56 1.00 d2 8.34 2.42 0.20 d3 2.07 6.84 11.61

圖3A為利用波長為470奈米、510奈米、555奈米、610奈米及650奈米的光所作的像散場曲(Field Curvature)圖，其橫軸為與焦面相差的距離，其最大值為0.033mm，而縱軸為從0到最大的視場角，其最大值為15.8度。此外，在圖3A的像散場曲圖形中，S代表弧矢（sagittal）方向的數據，而T代表子午（tangential）方向的數據。圖3B為利用波長為470奈米、510奈米、555奈米、610奈米及650奈米的光所作的畸變(Distortion)圖，其橫軸為多少百分比的畸變，其最大值為-1.941 %。而縱軸為從0到最大的視場角，其最大值為15.8度。圖4A與圖4B分別與圖3A與圖3B對應，兩者的模擬條件的差異在於圖4A與圖4B是在望遠端所得到的數據，其縱軸的最大值（即，最大的視場角）為5.94度，而其他的模擬條件則分別與圖3A與圖3B相同。FIG. 3A is an astigmatic field curve (Field Curvature) graph using light with wavelengths of 470 nm, 510 nm, 555 nm, 610 nm and 650 nm, the horizontal axis is the distance from the focal plane, the The maximum value is 0.033mm, while the vertical axis is from 0 to the largest field of view, which has a maximum value of 15.8 degrees. Furthermore, in the astigmatic field curvature graph of FIG. 3A , S represents data in the sagittal direction, and T represents data in the tangential direction. FIG. 3B is a Distortion diagram using light with wavelengths of 470 nm, 510 nm, 555 nm, 610 nm and 650 nm, the horizontal axis is the percentage of the distortion, and the maximum value is -1.941 %. The vertical axis is from 0 to the largest field of view, and its maximum value is 15.8 degrees. Figures 4A and 4B correspond to Figures 3A and 3B respectively, and the difference in the simulation conditions between the two is that Figures 4A and 4B are data obtained at the telephoto end, and the maximum value of the vertical axis (that is, the maximum angle of view) ) is 5.94 degrees, while other simulation conditions are the same as those in Fig. 3A and Fig. 3B, respectively.

如圖3A與圖3B與圖4A與圖4B所示，變焦鏡頭100的焦距為在廣角端及望遠端於畸變、像散場曲方面上，皆有良好的成像品質。因此，本實施例的變焦鏡頭100可在維持良好成像品質的前提下，達到易於進行組裝以及控制的優點。As shown in FIGS. 3A and 3B and FIGS. 4A and 4B , the focal length of the zoom lens 100 has good imaging quality in terms of distortion and astigmatic field curvature at the wide-angle end and the telephoto end. Therefore, the zoom lens 100 of this embodiment can achieve the advantages of easy assembly and control under the premise of maintaining good imaging quality.

圖5是本發明一實施例的一種變焦鏡頭的結構示意圖。圖6A與圖6B是本發明另一實施例的變焦鏡頭於廣角端時的光學模擬數據圖。圖7A與圖7B是本發明另一實施例的變焦鏡頭於望遠端時的光學模擬數據圖。請參照圖5，變焦鏡頭500與圖1的變焦鏡頭100類似，而其中差異在於：變焦鏡頭500的各光學數據、非球面係數及其他參數略有不同。FIG. 5 is a schematic structural diagram of a zoom lens according to an embodiment of the present invention. 6A and 6B are optical simulation data diagrams of the zoom lens at the wide-angle end of another embodiment of the present invention. 7A and 7B are optical simulation data diagrams of the zoom lens according to another embodiment of the present invention when the zoom lens is at the telephoto end. Referring to FIG. 5 , the zoom lens 500 is similar to the zoom lens 100 of FIG. 1 , and the difference is that the optical data, aspheric coefficients and other parameters of the zoom lens 500 are slightly different.

進一步而言，在本實施例中，第一透鏡511、第二透鏡512、第三透鏡513、第四透鏡514、第五透鏡521、第六透鏡522、第七透鏡523以及第八透鏡524分別為雙凸透鏡、凹面朝向像側的凸凹透鏡、雙凹透鏡、雙凸透鏡、雙凸透鏡、雙凹透鏡、凹面朝向像側的凸凹透鏡、凹面朝向像側的凹凸透鏡。Further, in this embodiment, the first lens 511 , the second lens 512 , the third lens 513 , the fourth lens 514 , the fifth lens 521 , the sixth lens 522 , the seventh lens 523 and the eighth lens 524 are respectively It is a biconvex lens, a convex-concave lens with the concave surface facing the image side, a biconcave lens, a biconvex lens, a biconvex lens, a biconcave lens, a convex-concave lens with the concave surface facing the image side, and a meniscus lens with the concave surface facing the image side.

第一透鏡群510的第一透鏡511與第二透鏡512各為一材質為玻璃的球面透鏡，而第一透鏡群510的第三透鏡513與第四透鏡514、第二透鏡群520的第五透鏡521、第六透鏡522、第七透鏡523以及第八透鏡524各為一材質為塑膠的非球面透鏡。除此之外，在本實施例中，變焦鏡頭500的結構與作動機制與變焦鏡頭100的結構與作動機制皆類似，相關細節請參考上述段落，在此不再重述。並且，在本實施例中，由於變焦鏡頭500與變焦鏡頭100結構相似，因此，變焦鏡頭500同樣具有變焦鏡頭100所提及的優點，在此亦不再贅述。The first lens 511 and the second lens 512 of the first lens group 510 are each a spherical lens made of glass, and the third lens 513 and the fourth lens 514 of the first lens group 510 and the fifth lens of the second lens group 520 Each of the lens 521 , the sixth lens 522 , the seventh lens 523 and the eighth lens 524 is an aspherical lens made of plastic. In addition, in this embodiment, the structure and actuation mechanism of the zoom lens 500 are similar to the structure and actuation mechanism of the zoom lens 100 . Please refer to the above paragraphs for relevant details, which will not be repeated here. Moreover, in this embodiment, since the zoom lens 500 is similar in structure to the zoom lens 100 , the zoom lens 500 also has the advantages mentioned in the zoom lens 100 , which will not be repeated here.

以下內容將舉出變焦鏡頭500的一實施例，然而，下文中所列舉的數據資料並非用以限定本發明，任何所屬領域中具有通常知識者在參照本發明之後，當可對其參數或設定作適當的更動，惟其仍應屬於本發明的範疇內。〈表四〉表面曲率半徑(mm) 間距(mm) 折射率阿貝數備註 SO 無限大無限大 S501 無限大 11.000 光學轉向元件PM S502 無限大可變間距(d1) S503 18.349 1.646 1.517 64.167 第一透鏡511 S504 -21.606 0.392 　　 S505 42.866 1.006 1.620 60.374 第二透鏡512 S506 8.784 1.630 　　 S507 -6.348 0.786 1.545 55.987 第三透鏡513 S508 16.371 0.286 　　 S509 15.722 1.099 1.643 22.456 第四透鏡514 S510 -466.499 可變間距(d2) 　　 S511 無限大 0.100 　　孔徑光闌130 S512 5.234 2.726 1.545 55.987 第五透鏡521 S513 -6.326 0.109 　　 S514 -9.348 3.450 1.643 22.456 第六透鏡522 S515 32.181 7.442 　　 S516 11.454 0.507 1.545 55.987 第七透鏡523 S517 5.900 0.208 　　 S518 6.981 1.158 1.643 22.456 第八透鏡524 S519 9.545 可變間距(d3) 　　 S520 無限大 0.210 1.517 64.167 紅外線截止濾鏡IR S521 無限大 0.500 SI 無限大影像感測元件140 The following content will illustrate an embodiment of the zoom lens 500. However, the data listed in the following is not intended to limit the present invention. Anyone with ordinary knowledge in the art can refer to the present invention and can adjust its parameters or settings after referring to the present invention. Appropriate modifications should be made, but they should still fall within the scope of the present invention. <Table 4> surface Radius of curvature (mm) Spacing(mm) refractive index Abbe number Remark SO Unlimited Unlimited S501 Unlimited 11.000 Optical steering element PM S502 Unlimited Variable spacing (d1) S503 18.349 1.646 1.517 64.167 The first lens 511 S504 -21.606 0.392 S505 42.866 1.006 1.620 60.374 Second lens 512 S506 8.784 1.630 S507 -6.348 0.786 1.545 55.987 Third lens 513 S508 16.371 0.286 S509 15.722 1.099 1.643 22.456 Fourth lens 514 S510 -466.499 Variable spacing (d2) S511 Unlimited 0.100 Aperture diaphragm 130 S512 5.234 2.726 1.545 55.987 Fifth lens 521 S513 -6.326 0.109 S514 -9.348 3.450 1.643 22.456 Sixth lens 522 S515 32.181 7.442 S516 11.454 0.507 1.545 55.987 Seventh lens 523 S517 5.900 0.208 S518 6.981 1.158 1.643 22.456 Eighth lens 524 S519 9.545 Variable spacing (d3) S520 Unlimited 0.210 1.517 64.167 Infrared cut filter IR S521 Unlimited 0.500 SI Unlimited Image sensing element 140

在〈表四〉中，曲率半徑是指每一表面的曲率半徑，間距是指兩相鄰表面間的距離。舉例來說，表面S501的間距，即表面S501至表面S502在光軸O上的距離。備註欄中各透鏡所對應的厚度、折射率與阿貝數請參照同列中各間距、折射率與阿貝數對應的數值。此外，表面S501、S502是光學轉向元件PM的反射面與出光面。表面S503、S504是第一透鏡511的兩表面。表面S505、S506是第二透鏡512的兩表面。表面S507、S508是第三透鏡513的兩表面。表面S509、S510是第四透鏡514的兩表面。孔徑光闌130位於表面S511上。表面S512、S513是第五透鏡521的兩表面。表面S514、S515是第六透鏡522的兩表面，表面S516、S517是第七透鏡523的兩表面。表面S518、S519是第八透鏡524的兩表面。表面S520、S521為紅外線截止濾鏡IR的兩表面。表面SI則為影像感測元件140的成像表面。In <Table 4>, the radius of curvature refers to the radius of curvature of each surface, and the spacing refers to the distance between two adjacent surfaces. For example, the distance of the surface S501, that is, the distance on the optical axis O from the surface S501 to the surface S502. For the thickness, refractive index and Abbe number corresponding to each lens in the remarks column, please refer to the values corresponding to each pitch, refractive index and Abbe number in the same column. In addition, the surfaces S501 and S502 are the reflection surface and the light exit surface of the optical turning element PM. The surfaces S503 and S504 are the two surfaces of the first lens 511 . Surfaces S505 and S506 are the two surfaces of the second lens 512 . Surfaces S507 and S508 are both surfaces of the third lens 513 . Surfaces S509 and S510 are both surfaces of the fourth lens 514 . Aperture stop 130 is located on surface S511. Surfaces S512 and S513 are both surfaces of the fifth lens 521 . The surfaces S514 and S515 are the two surfaces of the sixth lens 522 , and the surfaces S516 and S517 are the two surfaces of the seventh lens 523 . Surfaces S518 and S519 are both surfaces of the eighth lens 524 . The surfaces S520 and S521 are the two surfaces of the infrared cut filter IR. The surface SI is the imaging surface of the image sensing element 140 .

承上述，表面S507、S508、S509、S510、S512、S513、S514、S515、S516、S517、S518、S519為非球面，而非球面的公式如下：

其中，Z為光軸O方向的偏移量。R是密切球面(osculating sphere)的半徑，也就是接近光軸O處的曲率半徑。K為圓錐常數(conic constant)。H是非球面高度，即為從透鏡中心往透鏡邊緣的高度，從公式中可得知，不同的H會對應出不同的Z值。A、B、C、D、E、F、G為非球面係數(aspheric coefficient)。表面S507、S508、S509、S510、S512、S513、S514、S515、S516、S517、S518、S519的非球面係數及K值如〈表五〉所示：〈表五〉

表面 K A B C D E F G S507 0 9.30E-05 1.14E-05 9.20E-08 2.97E-08 2.48E-09 -4.36E-10 -7.84E-12 S508 0 -4.77E-05 -2.27E-06 -3.22E-08 -1.60E-08 2.14E-09 -5.97E-10 -2.88E-11 S509 0 -4.99E-05 -5.64E-06 -4.96E-07 -2.88E-08 -3.85E-09 -2.45E-10 -1.35E-11 S510 0 2.94E-06 -5.08E-07 -9.83E-08 -4.32E-08 -1.37E-09 -1.73E-10 3.05E-12 S512 -7.62E-01 4.72E-04 1.09E-05 1.59E-07 1.59E-08 9.62E-09 -2.56E-11 -5.05E-13 S513 0 1.55E-03 6.95E-05 -4.12E-07 -4.04E-08 -6.30E-10 -2.71E-11 -3.31E-12 S514 0 -3.35E-04 1.08E-04 3.06E-06 -5.52E-07 1.21E-10 -1.10E-11 -4.15E-12 S515 0 1.17E-04 1.08E-04 8.37E-06 -9.69E-07 6.45E-08 2.09E-10 -1.04E-11 S516 0 -9.63E-03 7.22E-04 -1.69E-05 2.51E-06 -4.75E-08 -1.11E-08 -2.66E-10 S517 0 -1.05E-02 8.29E-04 6.13E-06 -6.95E-06 1.00E-06 -3.59E-08 8.51E-11 S518 0 -6.84E-04 -2.05E-05 7.85E-05 -2.63E-05 3.66E-06 -2.38E-07 5.76E-09 S519 0 -5.54E-04 1.30E-04 -1.02E-05 -2.03E-06 -3.12E-07 1.04E-07 -7.33E-09

Based on the above, the surfaces S507, S508, S509, S510, S512, S513, S514, S515, S516, S517, S518, and S519 are aspheric surfaces, and the formula for aspheric surfaces is as follows:

Among them, Z is the offset in the direction of the optical axis O. R is the radius of the osculating sphere, that is, the radius of curvature near the optical axis O. K is the conic constant. H is the height of the aspheric surface, which is the height from the center of the lens to the edge of the lens. It can be known from the formula that different H will correspond to different Z values. A, B, C, D, E, F, and G are aspheric coefficients. The aspheric coefficients and K values of the surfaces S507, S508, S509, S510, S512, S513, S514, S515, S516, S517, S518 and S519 are shown in <Table 5>: <Table 5>

surface K A B C D E F G S507 0 9.30E-05 1.14E-05 9.20E-08 2.97E-08 2.48E-09 -4.36E-10 -7.84E-12 S508 0 -4.77E-05 -2.27E-06 -3.22E-08 -1.60E-08 2.14E-09 -5.97E-10 -2.88E-11 S509 0 -4.99E-05 -5.64E-06 -4.96E-07 -2.88E-08 -3.85E-09 -2.45E-10 -1.35E-11 S510 0 2.94E-06 -5.08E-07 -9.83E-08 -4.32E-08 -1.37E-09 -1.73E-10 3.05E-12 S512 -7.62E-01 4.72E-04 1.09E-05 1.59E-07 1.59E-08 9.62E-09 -2.56E-11 -5.05E-13 S513 0 1.55E-03 6.95E-05 -4.12E-07 -4.04E-08 -6.30E-10 -2.71E-11 -3.31E-12 S514 0 -3.35E-04 1.08E-04 3.06E-06 -5.52E-07 1.21E-10 -1.10E-11 -4.15E-12 S515 0 1.17E-04 1.08E-04 8.37E-06 -9.69E-07 6.45E-08 2.09E-10 -1.04E-11 S516 0 -9.63E-03 7.22E-04 -1.69E-05 2.51E-06 -4.75E-08 -1.11E-08 -2.66E-10 S517 0 -1.05E-02 8.29E-04 6.13E-06 -6.95E-06 1.00E-06 -3.59E-08 8.51E-11 S518 0 -6.84E-04 -2.05E-05 7.85E-05 -2.63E-05 3.66E-06 -2.38E-07 5.76E-09 S519 0 -5.54E-04 1.30E-04 -1.02E-05 -2.03E-06 -3.12E-07 1.04E-07 -7.33E-09

在〈表六〉中分別列出變焦鏡頭500的焦距為廣角端及望遠端時的一些重要參數值，包括有效焦距、視場角、光圈數及可變間距d1、d2、d3。〈表六〉廣角端中繼位置望遠端有效焦距(mm) 10.51 19.28 28.04 光圈數 3.00 4.25 5.50 視場角(度) 31.6 17.2 11.8 可變間距(mm) d1 3.20 3.80 1.00 d2 7.59 2.14 0.10 d3 1.96 6.80 11.65 Table 6 lists some important parameter values when the focal length of the zoom lens 500 is at the wide-angle end and the telephoto end, including the effective focal length, field of view, aperture number, and variable spacings d1, d2, and d3. <Table 6> wide end relay location telephoto end Effective focal length (mm) 10.51 19.28 28.04 Aperture number 3.00 4.25 5.50 Field of view (degrees) 31.6 17.2 11.8 Variable pitch (mm) d1 3.20 3.80 1.00 d2 7.59 2.14 0.10 d3 1.96 6.80 11.65

圖6A為利用波長為470奈米、510奈米、555奈米、610奈米及650奈米的光所作的像散場曲(Field Curvature)圖，其橫軸為與焦面相差的距離，其最大值為0.028mm，而縱軸為從0到最大的視場角，其最大值為15.8度。此外，在圖6A的像散場曲圖形中，S代表弧矢（sagittal）方向的數據，而T代表子午（tangential）方向的數據。圖6B為利用波長為470奈米、510奈米、555奈米、610奈米及650奈米的光所作的畸變(Distortion)圖，其橫軸為多少百分比的畸變，其最大值為-1.916%，而縱軸為從0到最大的視場角，其最大值為15.8度。圖7A與圖7B分別與圖6A與圖6B對應，兩者的模擬條件的差異在於圖7A與圖7B是在望遠端所得到的數據，其縱軸的最大值（即，最大的視場角）為5.94度，而其他的模擬條件則分別與圖6A與圖6B相同。FIG. 6A is an astigmatic field curve (Field Curvature) graph using light with wavelengths of 470 nm, 510 nm, 555 nm, 610 nm and 650 nm, the horizontal axis is the distance from the focal plane, the The maximum value is 0.028mm, while the vertical axis is from 0 to the maximum field of view, which has a maximum value of 15.8 degrees. Furthermore, in the astigmatic field curvature graph of FIG. 6A , S represents data in a sagittal direction, and T represents data in a tangential direction. FIG. 6B is a graph of the distortion (Distortion) using light with wavelengths of 470 nm, 510 nm, 555 nm, 610 nm and 650 nm, the horizontal axis is the percentage of the distortion, and the maximum value is -1.916 %, while the vertical axis is from 0 to the maximum field of view, which has a maximum value of 15.8 degrees. Figures 7A and 7B correspond to Figures 6A and 6B respectively, and the difference in the simulation conditions between the two is that Figures 7A and 7B are data obtained at the telephoto end, and the maximum value of the vertical axis (that is, the maximum angle of view) ) is 5.94 degrees, while other simulation conditions are the same as those in Fig. 6A and Fig. 6B, respectively.

如圖6A與圖6B與圖7A與圖7B所示，變焦鏡頭500的焦距為在廣角端及望遠端於畸變、像散場曲方面上，皆有良好的成像品質。因此，本實施例的變焦鏡頭500可在維持良好成像品質的前提下，達到易於進行組裝以及控制的優點。As shown in FIGS. 6A and 6B and FIGS. 7A and 7B , the focal length of the zoom lens 500 has good imaging quality in terms of distortion and astigmatic field curvature at the wide-angle end and the telephoto end. Therefore, the zoom lens 500 of this embodiment can achieve the advantages of easy assembly and control on the premise of maintaining good imaging quality.

綜上所述，本發明的變焦鏡頭僅透過相對移動的第一透鏡群與第二透鏡群，就可滿足變焦鏡頭的連續光學變焦的需求，光學配置相對簡單，進而可在維持良好成像品質的前提下，達到易於進行組裝以及控制的優點。To sum up, the zoom lens of the present invention can meet the requirements of continuous optical zooming of the zoom lens only through the relatively moving first lens group and the second lens group, and the optical configuration is relatively simple, thereby maintaining good imaging quality. On the premise, the advantages of easy assembly and control are achieved.

100、500:變焦鏡頭 110、510:第一透鏡群 111、511:第一透鏡 112、512:第二透鏡 113、513:第三透鏡 114、514:第四透鏡 120、520:第二透鏡群 121、521:第五透鏡 122、522:第六透鏡 123、523:第七透鏡 124、524:第八透鏡 130:孔徑光闌 140:影像感測元件 S101、S102、S103、S104、S105、S106、S107、S108、S109、S110、S111、S112、S113、S114、S115 S116、S117、S118、S119、S120、S121、S501、S502、S503、S504、S505、S506、S507、S508、S509、S510、S511、S512、S513、S514、S515 S516、S517、S518、S519、S520、S521、SO、SI:表面 d1、d2、d3:可變間距 PM:光學轉向元件 IR:紅外線截止濾鏡 O:光軸100, 500: zoom lens 110, 510: The first lens group 111, 511: The first lens 112, 512: Second lens 113, 513: The third lens 114, 514: Fourth lens 120, 520: The second lens group 121, 521: Fifth lens 122, 522: sixth lens 123, 523: seventh lens 124, 524: Eighth lens 130: Aperture diaphragm 140: Image Sensing Components S101, S102, S103, S104, S105, S106, S107, S108, S109, S110, S111, S112, S113, S114, S115 S116, S117, S118, S119, S120, S121, S501, S502, S503, S504, S5 , S506, S507, S508, S509, S510, S511, S512, S513, S514, S515 S516, S517, S518, S519, S520, S521, SO, SI: Surface d1, d2, d3: variable spacing PM: Optical steering element IR: Infrared cut filter O: Optical axis

圖1是本發明一實施例的一種變焦鏡頭的結構示意圖。圖2A至圖2C分別是圖1的變焦鏡頭的焦距為廣角端、中繼位置與望遠端時的示意圖。圖3A與圖3B是本發明一實施例的變焦鏡頭於廣角端時的光學模擬數據圖。圖4A與圖4B是本發明一實施例的變焦鏡頭於望遠端時的光學模擬數據圖。圖5是本發明一實施例的一種變焦鏡頭的結構示意圖。圖6A與圖6B是本發明另一實施例的變焦鏡頭於廣角端時的光學模擬數據圖。圖7A與圖7B是本發明另一實施例的變焦鏡頭於望遠端時的光學模擬數據圖。FIG. 1 is a schematic structural diagram of a zoom lens according to an embodiment of the present invention. 2A to 2C are schematic diagrams of the zoom lens of FIG. 1 when the focal lengths are at the wide-angle end, the relay position, and the telephoto end, respectively. 3A and 3B are optical simulation data diagrams of the zoom lens at the wide-angle end according to an embodiment of the present invention. 4A and 4B are optical simulation data diagrams of the zoom lens at the telephoto end according to an embodiment of the present invention. FIG. 5 is a schematic structural diagram of a zoom lens according to an embodiment of the present invention. 6A and 6B are optical simulation data diagrams of the zoom lens of another embodiment of the present invention at the wide-angle end. 7A and 7B are optical simulation data diagrams of the zoom lens of another embodiment of the present invention when the zoom lens is at the telephoto end.

100:變焦鏡頭 100: zoom lens

110:第一透鏡群 110: The first lens group

111:第一透鏡 111: The first lens

112:第二透鏡 112: Second lens

113:第三透鏡 113: The third lens

114:第四透鏡 114: Fourth lens

120:第二透鏡群 120: The second lens group

121:第五透鏡 121: Fifth lens

122:第六透鏡 122: sixth lens

123:第七透鏡 123: Seventh Lens

124:第八透鏡 124: Eighth Lens

130:孔徑光闌 130: Aperture diaphragm

140:影像感測元件 140: Image Sensing Components

S101、S102、S103、S104、S105、S106、S107、S108、S109、S110、S111、S112、S113、S114、S115S116、S117、S118、S119、S120、S121、SO、SI:表面 S101, S102, S103, S104, S105, S106, S107, S108, S109, S110, S111, S112, S113, S114, S115, S116, S117, S118, S119, S120, S121, SO, SI: Surface

d1、d2、d3:可變間距 d1, d2, d3: variable spacing

PM:光學轉向元件 PM: Optical steering element

IR:紅外線截止濾鏡 IR: Infrared cut filter

O:光軸 O: Optical axis

Claims

A zoom lens, comprising: a first lens group including a first lens, a second lens, a third lens and a fourth lens arranged in sequence from an object side to an image side; and A second lens group is disposed between the first lens group and the image side, and includes a fifth lens, a sixth lens, a seventh lens and a eighth lens, wherein The first lens group and the second lens group are suitable for relative movement, so that the zoom lens is zoomed between a wide-angle end and a telephoto end, and when the zoom lens is switched from the wide-angle end to a relay position, The first lens group is adapted to move to the image side, when the zoom lens is switched from the relay position to the telephoto end, the first lens group is adapted to move to the object side, and the zoom lens is switched to the middle In the following position, the zoom ratio of this zoom lens is 5.7 times.

The zoom lens of claim 1, wherein when the zoom lens is switched from the wide-angle end to the telephoto end, the second lens group is adapted to move toward the object side.

The zoom lens of claim 1, wherein when the zoom lens is focusing at the same magnification, the distance between the first lens group and the second lens group remains unchanged.

The zoom lens of claim 1, wherein the zoom lens satisfies: 5 < T/H <10; and 0.3 < (D ₁₁ *F _w )/(H*F _t ) <0.9; wherein H is the zoom lens maximum imaging height, T is the total length of the zoom lens, D ₁₁ is the diameter of the first lens, F _w is the equivalent focal length of the zoom lens switched to the wide-angle end, F _{t is} the zoom lens switched to the telephoto end Equivalent focal length.

The zoom lens according to claim 1, further comprising: An optical turning element, wherein the position of the optical turning element in the zoom lens remains fixed.

The zoom lens of claim 1, wherein the second lens group further comprises an aperture stop disposed between the first lens group and the second lens group.

The zoom lens of claim 1, wherein the first lens group has a negative refractive power, and the refractive powers of the first lens, the second lens, the third lens and the fourth lens are positive, negative, negative, just.

The zoom lens of claim 1, wherein the second lens group has a positive refractive power, and the refractive powers of the fifth lens, the sixth lens, the seventh lens and the eighth lens are positive, negative and negative in sequence ,just.

The zoom lens of claim 1, wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens At least four of them are aspherical lenses.

A zoom lens, comprising: a first lens group, including a first lens, a second lens, a third lens and a fourth lens arranged in sequence from an object side to an image side; and a second lens a group, disposed between the first lens group and the image side, and comprising a fifth lens, a sixth lens, a seventh lens and an eighth lens arranged in sequence from the object side to the image side, And the zoom lens satisfies: 5 < T/H <10; and 0.3 < (D ₁₁ *F _w )/(H*F _t ) <0.9; where H is the maximum imaging height of the zoom lens, and T is the zoom lens D ₁₁ is the diameter of the first lens, F _w is the equivalent focal length at which the zoom lens is switched to a wide-angle end, and F _t is the equivalent focal length at which the zoom lens is switched to a telephoto end.

The zoom lens of claim 10, wherein the first lens group and the second lens group are adapted to move relative to each other, so that the zoom lens is zoomed between the wide-angle end and the telephoto end, when the zoom lens is moved by the When the wide-angle end is switched to a relay position, the first lens group is adapted to move toward the image side, and when the zoom lens is switched from the relay position to the telephoto end, the first lens group is adapted to face the object relatively When the zoom lens is moved to the relay position, the zoom ratio of the zoom lens is 5.7 times.

The zoom lens of claim 10, wherein when the zoom lens is switched from the wide-angle end to the telephoto end, the second lens group is adapted to move relatively to the object side.

The zoom lens of claim 10, wherein when the zoom lens is focusing at the same magnification, the distance between the first lens group and the second lens group remains unchanged.

The zoom lens according to claim 10, further comprising: An optical turning element, wherein the position of the optical turning element in the zoom lens remains fixed.

The zoom lens as claimed in claim 10, wherein the second lens group further comprises an aperture stop disposed between the first lens group and the second lens group.

The zoom lens of claim 10, wherein the second lens group has a positive refractive power, and the refractive powers of the fifth lens, the sixth lens, the seventh lens and the eighth lens are positive, negative and negative in sequence ,just.

The zoom lens of claim 10, wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens At least four of them are aspherical lenses.