TW202121040A - Zoom lens module - Google Patents
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Abstract
Description
本發明是有關於一種鏡頭模組,且特別是有關於一種變焦鏡頭模組。The present invention relates to a lens module, and particularly relates to a zoom lens module.
目前行動裝置(如手機、平板等)的鏡頭模組在長焦變倍時需使用多個鏡頭模組來互相搭配,且變倍的相片有解析度下降的問題。At present, the lens modules of mobile devices (such as mobile phones, tablets, etc.) need to use multiple lens modules to match each other during telephoto zooming, and the resolution of zoomed photos has a problem of reduced resolution.
本發明提供一種變焦鏡頭模組,其可提供連續光學變焦的功能。The present invention provides a zoom lens module, which can provide the function of continuous optical zoom.
本發明的一種變焦鏡頭模組包括從物端至像端依序排列的第一透鏡、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。變焦鏡頭模組中具有屈光度的透鏡的數量共八片。第一透鏡以及第二透鏡組成第一透鏡群。第三透鏡以及第四透鏡組成第二透鏡群。第五透鏡以及第六透鏡組成第三透鏡群。第七透鏡以及第八透鏡組成第四透鏡群。第一透鏡群以及第四透鏡群在變焦時保持固定不動,且第二透鏡群以及第三透鏡群在變焦時移動。A zoom lens module of the present invention includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens sequentially arranged from the object end to the image end . There are a total of eight lenses with diopter in the zoom lens module. The first lens and the second lens form a first lens group. The third lens and the fourth lens form a second lens group. The fifth lens and the sixth lens form a third lens group. The seventh lens and the eighth lens form a fourth lens group. The first lens group and the fourth lens group remain fixed during zooming, and the second lens group and the third lens group move during zooming.
在本發明的一實施例中,第一透鏡群、第二透鏡群、第三透鏡群以及第四透鏡群的屈光度依序為正、負、正以及正。In an embodiment of the present invention, the refractive powers of the first lens group, the second lens group, the third lens group, and the fourth lens group are positive, negative, positive, and positive in order.
在本發明的一實施例中,第二透鏡群從廣角端切換至望遠端時,由物端向像端移動。In an embodiment of the present invention, when the second lens group is switched from the wide-angle end to the telephoto end, it moves from the object end to the image end.
在本發明的一實施例中,第三透鏡群從廣角端切換至望遠端時,由像端向物端移動。In an embodiment of the present invention, when the third lens group is switched from the wide-angle end to the telephoto end, it moves from the image end to the object end.
在本發明的一實施例中,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的屈光度依序為正、負、負、正、正、負、正以及負。In an embodiment of the present invention, the refractive powers of 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 are positive, negative, and negative in order. , Positive, positive, negative, positive and negative.
在本發明的一實施例中,第一透鏡至第八透鏡包括七片非球面透鏡以及一片球面透鏡。In an embodiment of the present invention, the first lens to the eighth lens include seven aspheric lenses and one spherical lens.
在本發明的一實施例中,第一透鏡至第八透鏡全為非球面透鏡。In an embodiment of the present invention, the first lens to the eighth lens are all aspherical lenses.
在本發明的一實施例中,變焦鏡頭模組更包括光圈。光圈位於第四透鏡以及第五透鏡之間。In an embodiment of the present invention, the zoom lens module further includes an aperture. The aperture is located between the fourth lens and the fifth lens.
在本發明的一實施例中,變焦鏡頭模組更包括感測器。感測器設置在像端,其中變焦鏡頭模組滿足以下條件:5<T/L<10,其中T為鏡頭總長,且L為感測器的對角線長度。In an embodiment of the present invention, the zoom lens module further includes a sensor. The sensor is arranged at the image end, where the zoom lens module satisfies the following condition: 5<T/L<10, where T is the total length of the lens, and L is the diagonal length of the sensor.
在本發明的一實施例中,變焦鏡頭模組更包括感測器。感測器設置在像端,其中變焦鏡頭模組滿足以下條件:0.3<(D11*fw)/(L*ft)<0.9,其中D11為第一透鏡的直徑,fw為變焦鏡頭模組在廣角端的等效焦距,L為感測器的對角線長度,且ft為變焦鏡頭模組在望遠端的等效焦距。In an embodiment of the present invention, the zoom lens module further includes a sensor. The sensor is set at the image end, where the zoom lens module satisfies the following conditions: 0.3<(D11*fw)/(L*ft)<0.9, where D11 is the diameter of the first lens, and fw is the zoom lens module at wide angle The equivalent focal length at the telephoto end, L is the diagonal length of the sensor, and ft is the equivalent focal length of the zoom lens module at the telephoto end.
為讓本發明的上述特徵和優點能更明顯易懂,下文特舉實施例,並配合所附圖式作詳細說明如下。In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.
本文中所提到的方向用語,例如:「上」、「下」、「前」、「後」、「左」、「右」等,僅是參考附圖的方向。因此,使用的方向用語是用來說明,而並非用來限制本發明。The directional terms mentioned in this article, such as "up", "down", "front", "rear", "left", "right", etc., are only directions with reference to the drawings. Therefore, the directional terms used are used to illustrate, but not to limit the present invention.
在附圖中,各圖式繪示的是特定實施例中所使用的方法、結構或材料的通常性特徵。然而,這些圖式不應被解釋為界定或限制由這些實施例所涵蓋的範圍或性質。舉例來說,為了清楚起見,各膜層、區域或結構的相對尺寸、厚度及位置可能縮小或放大。In the drawings, each drawing depicts the general features of methods, structures, or materials used in specific embodiments. However, these drawings should not be construed as defining or limiting the scope or nature covered by these embodiments. For example, for clarity, the relative size, thickness, and position of each layer, region, or structure may be reduced or enlarged.
本說明書或申請專利範圍中提及的「第一」、「第二」等用語僅用以命名不同元件或區別不同實施例或範圍,而並非用來限制元件數量上的上限或下限,也並非用以限定元件的製造順序或設置順序。此外,一元件/膜層設置在另一元件/膜層上(或上方)可涵蓋所述元件/膜層直接設置在所述另一元件/膜層上(或上方),且兩個元件/膜層直接接觸的情況;以及所述元件/膜層間接設置在所述另一元件/膜層上(或上方),且兩個元件/膜層之間存在一或多個元件/膜層的情況。The terms "first" and "second" mentioned in this specification or the scope of the patent application are only used to name different elements or distinguish different embodiments or ranges, and are not used to limit the upper or lower limit of the number of elements, nor are they It is used to define the manufacturing order or the arrangement order of the components. In addition, the provision of one element/film layer on (or above) another element/film layer can encompass that the element/film layer is directly arranged on (or above) the other element/film layer, and two elements/ The film layer is in direct contact; and the element/film layer is indirectly arranged on (or above) the other element/film layer, and there are one or more elements/film layers between the two elements/film layers Happening.
圖1至圖3分別是本發明的一實施例的一種變焦鏡頭模組在廣角端、中間位置以及望遠端的示意圖。請參照圖1至圖3,變焦鏡頭模組1可應用於電子裝置(如手機或平板,但不以此為限)中,以擷取目標物S的影像或影片。1 to 3 are schematic diagrams of a zoom lens module at a wide-angle end, a middle position, and a telephoto end, respectively, according to an embodiment of the present invention. Please refer to FIGS. 1 to 3, the
變焦鏡頭模組1具有物端X1以及像端X2。物端X1以及像端X2為變焦鏡頭模組1的相對兩端。在擷取目標物S的影像或影片時,物端X1為變焦鏡頭模組1面向目標物S的一端,而像端X2則為感測器10的所在端。The
變焦鏡頭模組1可包括從物端X1至像端X2依序排列的第一透鏡L1、第二透鏡L2、第三透鏡L3、第四透鏡L4、第五透鏡L5、第六透鏡L6、第七透鏡L7以及第八透鏡L8。變焦鏡頭模組1中具有屈光度的透鏡只有上述八片透鏡,即,變焦鏡頭模組1中具有屈光度的透鏡的數量共八片。The
第一透鏡L1至第八透鏡L8的材質可為玻璃或塑膠,但不以此為限。在一些實施例中,第一透鏡L1至第八透鏡L8可全為非球面透鏡,但不以此為限。在其他實施例中,第一透鏡L1至第八透鏡L8可包括七片非球面透鏡以及一片球面透鏡。The material of the first lens L1 to the eighth lens L8 can be glass or plastic, but not limited to this. In some embodiments, the first lens L1 to the eighth lens L8 may all be aspherical lenses, but not limited to this. In other embodiments, the first lens L1 to the eighth lens L8 may include seven aspheric lenses and one spherical lens.
在本實施例中,第一透鏡L1的屈光度為正,且第一透鏡L1為雙凸透鏡,其中第一透鏡L1的物側面S11以及像側面S12皆為非球面,但不以此為限。第二透鏡L2的屈光度為負,且第二透鏡L2為凸面(像側面S22)朝向像端X2的凸凹透鏡,其中第二透鏡L2的物側面S21以及像側面S22皆為非球面,但不以此為限。第三透鏡L3的屈光度為負,且第三透鏡L3為雙凹透鏡,其中第三透鏡L3的物側面S31以及像側面S32皆為非球面,但不以此為限。第四透鏡L4的屈光度為正,且第四透鏡L4為雙凸透鏡,其中第四透鏡L4的物側面S41以及像側面S42皆為非球面,但不以此為限。第五透鏡L5的屈光度為正,且第五透鏡L5為雙凸透鏡,其中第五透鏡L5的物側面S51以及像側面S52皆為非球面,但不以此為限。第六透鏡L6的屈光度為負,且第六透鏡L6為雙凹透鏡,其中第六透鏡L6的物側面S61以及像側面S62皆為非球面,但不以此為限。第七透鏡L7的屈光度為正,且第七透鏡L7為雙凸透鏡,其中第七透鏡L7的物側面S71以及像側面S72皆為非球面,但不以此為限。第八透鏡L8的屈光度為負,且第八透鏡L8為凸面(像側面S82)朝向像端X2的凸凹透鏡,其中第八透鏡L8的物側面S81以及像側面S82皆為非球面,但不以此為限。In this embodiment, the refractive power of the first lens L1 is positive, and the first lens L1 is a biconvex lens. The object side surface S11 and the image side surface S12 of the first lens L1 are both aspherical, but not limited to this. The refractive power of the second lens L2 is negative, and the second lens L2 is a convex-concave lens with a convex surface (image side surface S22) facing the image end X2. The object side surface S21 and the image side surface S22 of the second lens L2 are both aspherical, but not This is limited. The refractive power of the third lens L3 is negative, and the third lens L3 is a biconcave lens. The object side surface S31 and the image side surface S32 of the third lens L3 are both aspherical, but not limited to this. The refractive power of the fourth lens L4 is positive, and the fourth lens L4 is a biconvex lens. The object side surface S41 and the image side surface S42 of the fourth lens L4 are both aspherical, but not limited to this. The fifth lens L5 has a positive refractive power, and the fifth lens L5 is a biconvex lens. The object side surface S51 and the image side surface S52 of the fifth lens L5 are aspherical, but not limited to this. The refractive power of the sixth lens L6 is negative, and the sixth lens L6 is a biconcave lens, wherein the object side surface S61 and the image side surface S62 of the sixth lens L6 are both aspherical, but not limited to this. The seventh lens L7 has a positive refractive power, and the seventh lens L7 is a biconvex lens. The object side surface S71 and the image side surface S72 of the seventh lens L7 are both aspherical, but not limited to this. The refractive power of the eighth lens L8 is negative, and the eighth lens L8 is a convex-concave lens with a convex surface (image side S82) facing the image end X2. The object side S81 and the image side S82 of the eighth lens L8 are both aspherical, but not This is limited.
第一透鏡L1以及第二透鏡L2組成第一透鏡群G1。第一透鏡群G1的屈光度例如為正,以利收光及/或消除基礎像差。第三透鏡L3以及第四透鏡L4組成第二透鏡群G2。第二透鏡群G2的屈光度例如為負,以利光學變倍。第五透鏡L5以及第六透鏡L6組成第三透鏡群G3。第三透鏡群G3的屈光度例如為正,以補償光學變倍時像點的移動,使像點的位置固定,而不隨光學變倍而改變。第七透鏡L7以及第八透鏡L8組成第四透鏡群G4。第四透鏡群G4的屈光度例如為正,以將來自第三透鏡群G3的光匯聚在像平面(感測器10的感光面S10)上及/或消除像差或色差。The first lens L1 and the second lens L2 constitute a first lens group G1. The refractive power of the first lens group G1 is, for example, positive, so as to facilitate light collection and/or eliminate basic aberrations. The third lens L3 and the fourth lens L4 constitute a second lens group G2. The refractive power of the second lens group G2 is, for example, negative to facilitate optical zooming. The fifth lens L5 and the sixth lens L6 constitute a third lens group G3. The refractive power of the third lens group G3 is, for example, positive, to compensate for the movement of the image point during optical zooming, so that the position of the image point is fixed and does not change with the optical zooming. The seventh lens L7 and the eighth lens L8 constitute a fourth lens group G4. The refractive power of the fourth lens group G4 is, for example, positive, so as to converge the light from the third lens group G3 on the image plane (photosensitive surface S10 of the sensor 10) and/or eliminate aberrations or chromatic aberrations.
如圖1至圖3所示,第一透鏡群G1以及第四透鏡群G4在變焦時保持固定不動,且第二透鏡群G2以及第三透鏡群G3在變焦時移動。舉例來說,第二透鏡群G2從廣角端(圖1)切換至望遠端(圖3)時,由物端X1向像端X2移動。另一方面,第三透鏡群G3從廣角端(圖1)切換至望遠端(圖3)時,由像端X2向物端X1移動。As shown in FIGS. 1 to 3, the first lens group G1 and the fourth lens group G4 remain fixed during zooming, and the second lens group G2 and the third lens group G3 move during zooming. For example, when the second lens group G2 is switched from the wide-angle end (Figure 1) to the telephoto end (Figure 3), it moves from the object end X1 to the image end X2. On the other hand, when the third lens group G3 is switched from the wide-angle end (FIG. 1) to the telephoto end (FIG. 3 ), it moves from the image end X2 to the object end X1.
變焦鏡頭模組1可依需求而增加或減少一個或多個元件。舉例來說,變焦鏡頭模組1可進一步包括光圈AS。光圈AS位於第四透鏡L4以及第五透鏡L5之間。換句話說,光圈AS位於第二透鏡群G2以及第三透鏡群G3之間。光圈AS在變焦時可移動。舉例來說,光圈AS從廣角端(圖1)切換至望遠端(圖3)時,由像端X2向物端X1移動。The
變焦鏡頭模組1也可進一步包括濾光片9以及感測器10。感測器10設置在像端X2,而濾光片9可設置在第四透鏡群G4以及感測器10之間。舉例來說,濾光片9可為用以過濾紅外光的紅外光濾光片,但不以此為限。感測器10可包括電荷耦合元件(charge coupled device,CCD)影像感測元件或互補性氧化金屬半導體(complementary metal-oxide semiconductor,CMOS)影像感測元件,但不以此為限。在一實例中,感測器10可為3200萬畫素的感測器,但不以此為限。The
在一些實施例中,變焦鏡頭模組1可滿足以下條件:5<T/L<10,其中T為鏡頭總長,且L為感測器10的對角線長度。鏡頭總長指的是第一透鏡L1的物側面S1到感測器10的感光面S10在光軸I上的距離。感測器10的對角線長度指的是感測器10的感光區域的對角線長度。在一實例中,T為42 mm,且L為5.76 mm,但本揭露不以此為限。In some embodiments, the
在一些實施例中,變焦鏡頭模組1可滿足以下條件:0.3<(D11*fw)/(L*ft)<0.9,其中D11為第一透鏡L1的直徑,fw為變焦鏡頭模組1在廣角端的等效焦距,且ft為變焦鏡頭模組1在望遠端的等效焦距。第一透鏡L1的直徑指的是第一透鏡L1的有效區域(光學作用區)的直徑。在一實例中,D11為10.8 mm,fw10.38 mm,L為5.76 mm,且ft為27.7 mm,但本揭露不以此為限。In some embodiments, the
在一些實施例中,變焦鏡頭模組1的視場角(Field of View,FOV)為31.6至11.8,其中31.6為變焦鏡頭模組1在廣角端的視場角,而11.8為變焦鏡頭模組1在望遠端的視場角。在一些實施例中,變焦鏡頭模組1可滿足在3倍到8倍連續光學變焦的需求。在一些實施例中,變焦鏡頭模組1的光圈值(F數,F/#)為3.4至4.3,其中3.4為變焦鏡頭模組1在廣角端的光圈值,而4.3為變焦鏡頭模組1在望遠端的光圈值。In some embodiments, the field of view (FOV) of the
表一至表三分別舉出變焦鏡頭模組1的一實例。然而,表一至表三所列舉的數據資料並非用以限定本揭露,任何熟習此項技術之人士在參照本揭露之後,當可對參數或設定作適當的更動,惟其仍應屬於本揭露的範疇內。
在表一中,間距指的是所在表面至下一表面在光軸I上的距離。例如,物側面S11的間距為2.473指的是第一透鏡L1的物側面S11至像側面S12在光軸I上的距離為2.473。像側面S22、像側面S42以及像側面S62所對應的間距隨著光學變倍而改變,請參照表二。
非球面的公式如下:
其中,X為光軸I方向之偏移量。R是密切球面(osculating sphere)的半徑,也就是接近光軸處的曲率半徑。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X值。A、B、C、D、E、F、G為非球面係數(aspheric coefficient)。在一實例中,各透鏡表面的K值皆為0,且非球面係數如表三所示:
圖4以及圖5是第一實例的變焦鏡頭模組在廣角端的光學品質參考圖像,包括像散場曲(astigmatic field curves)圖及畸變(distortion)圖。圖6以及圖7是第一實例的變焦鏡頭模組在望遠端的光學品質參考圖像。圖4至圖7顯示變焦鏡頭模組的焦距在廣角端及望遠端時皆有良好的成像品質。因此,本實施例的變焦鏡頭模組可藉由光學變焦維持解析度及良好的成像品質。4 and 5 are optical quality reference images of the zoom lens module of the first example at the wide-angle end, including astigmatic field curves and distortion images. 6 and 7 are optical quality reference images of the zoom lens module of the first example at the telephoto end. 4 to 7 show that the focal length of the zoom lens module has good imaging quality at both the wide-angle end and the telephoto end. Therefore, the zoom lens module of this embodiment can maintain the resolution and good imaging quality through the optical zoom.
表四至表六分別舉出變焦鏡頭模組1的另一實例。在此實例中,第八透鏡L8例如為球面透鏡,即,第八透鏡L8的物側面S81以及像側面S82皆為球面。
在此實例中,各非球面的K值皆為0,且非球面係數如表六所示:
圖8以及圖9是第二實例的變焦鏡頭模組在廣角端的光學品質參考圖像,包括像散場曲圖及畸變圖。圖10以及圖11是第二實例的變焦鏡頭模組在望遠端的光學品質參考圖像。圖8至圖11顯示變焦鏡頭模組的焦距在廣角端及望遠端時皆有良好的成像品質。因此,本實施例的變焦鏡頭模組可藉由光學變焦維持解析度及良好的成像品質。8 and 9 are the optical quality reference images of the zoom lens module of the second example at the wide-angle end, including the astigmatic field curve diagram and the distortion diagram. 10 and 11 are optical quality reference images of the zoom lens module of the second example at the telephoto end. 8 to 11 show that the focal length of the zoom lens module has good imaging quality at both the wide-angle end and the telephoto end. Therefore, the zoom lens module of this embodiment can maintain the resolution and good imaging quality through the optical zoom.
綜上所述,在本發明的實施例中,藉由第二透鏡群以及第三透鏡群在變焦時移動,來實現光學變焦,從而改善習知變焦時解析度下降的問題,並維持良好的成像品質。To sum up, in the embodiment of the present invention, the second lens group and the third lens group move during zooming to achieve optical zoom, thereby improving the problem of resolution degradation during conventional zooming and maintaining good Image quality.
雖然本發明已以實施例揭露如上,然其並非用以限定本發明,任何所屬技術領域中具有通常知識者,在不脫離本發明的精神和範圍內,當可作些許的更動與潤飾,故本發明的保護範圍當視後附的申請專利範圍所界定者為準。Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the relevant technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be subject to those defined by the attached patent application scope.
1:變焦鏡頭模組 9:濾光片 10:感測器 AS:光圈 G1:第一透鏡群 G2:第二透鏡群 G3:第三透鏡群 G4:第四透鏡群 I:光軸 L1:第一透鏡 L2:第二透鏡 L3:第三透鏡 L4:第四透鏡 L5:第五透鏡 L6:第六透鏡 L7:第七透鏡 L8:第八透鏡 S:目標物 S11、S21、S31、S41、S51、S61、S71、S81、S91:物側面 S12、S22、S32、S42、S52、S62、S72、S82、S92:像側面 S10:感光面 X1:物端 X2:像端1: Zoom lens module 9: filter 10: Sensor AS: Aperture G1: The first lens group G2: Second lens group G3: Third lens group G4: The fourth lens group I: Optical axis L1: The first lens L2: second lens L3: third lens L4: Fourth lens L5: fifth lens L6: sixth lens L7: seventh lens L8: Eighth lens S: target S11, S21, S31, S41, S51, S61, S71, S81, S91: Object side S12, S22, S32, S42, S52, S62, S72, S82, S92: like side S10: photosensitive surface X1: Object end X2: image side
圖1至圖3分別是本發明的一實施例的一種變焦鏡頭模組在廣角端、中間位置以及望遠端的示意圖。 圖4以及圖5是第一實例的變焦鏡頭模組在廣角端的光學品質參考圖像。 圖6以及圖7是第一實例的變焦鏡頭模組在望遠端的光學品質參考圖像。 圖8以及圖9是第二實例的變焦鏡頭模組在廣角端的光學品質參考圖像。 圖10以及圖11是第二實例的變焦鏡頭模組在望遠端的光學品質參考圖像。1 to 3 are schematic diagrams of a zoom lens module at a wide-angle end, a middle position, and a telephoto end, respectively, according to an embodiment of the present invention. 4 and 5 are optical quality reference images of the zoom lens module of the first example at the wide-angle end. 6 and 7 are the optical quality reference images of the zoom lens module of the first example at the telephoto end. 8 and 9 are the optical quality reference images of the zoom lens module of the second example at the wide-angle end. 10 and 11 are optical quality reference images of the zoom lens module of the second example at the telephoto end.
1:變焦鏡頭模組 1: Zoom lens module
9:濾光片 9: filter
10:感測器 10: Sensor
AS:光圈 AS: Aperture
G1:第一透鏡群 G1: The first lens group
G2:第二透鏡群 G2: Second lens group
G3:第三透鏡群 G3: Third lens group
G4:第四透鏡群 G4: The fourth lens group
I:光軸 I: Optical axis
L1:第一透鏡 L1: The first lens
L2:第二透鏡 L2: second lens
L3:第三透鏡 L3: third lens
L4:第四透鏡 L4: Fourth lens
L5:第五透鏡 L5: fifth lens
L6:第六透鏡 L6: sixth lens
L7:第七透鏡 L7: seventh lens
L8:第八透鏡 L8: Eighth lens
S:目標物 S: target
S11、S21、S31、S41、S51、S61、S71、S81、S91:物側面 S11, S21, S31, S41, S51, S61, S71, S81, S91: Object side
S12、S22、S32、S42、S52、S62、S72、S82、S92:像側面 S12, S22, S32, S42, S52, S62, S72, S82, S92: like side
S10:感光面 S10: photosensitive surface
X1:物端 X1: Object end
X2:像端 X2: image side
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