1308230 九、發明說明： 【發明所屬之技術領域】 特別是指一種用來成像用 本發明是有關於一種鏡片 的光學鏡片。 【先前技術】 近年來’在行動電話上加入可照相的功能已成風潮， 光學鏡頭為了要能安裝在行動電話上，也遂漸縮小外觀尺 寸同時’該鏡頭内含的鏡片也縮小了，目前行動電話上 的鏡頭内含的鏡片半徑甚至可小到1 ·5χηηι，如此小型的鏡 片’則以塑膠鏡片相較於玻璃鏡片在製造成本與加工可行 性上更有競爭優勢。 參閱圖1、圖2，一種現有光學塑膠鏡片包含一光軸u 、一第一塑形面12,及一第二塑形面b。該第一塑形面12 包括由該光軸11沿一徑向依序區分成的一光學區14、一頂 針區15,及一承靠區16;其中，該光學區14具有一光學 有效徑141，及一由該光學有效徑141環繞區分並供成像光 線通過的圓形光闌（Aperture)142 ;該頂針區15具有多數個 適用於在一分模動作中供多數支頂針（圖未示）頂抵的頂出部 151 ;該承靠區16是呈封閉環开少並沿該光轴丨丨方向突出於 該頂針區15。該第二塑形面π是延該光軸丨丨方向上與該 第一塑形面12相背設置。 參閱圖2’該鏡片在一半徑方向上，該頂針區15的長 度0.65mm是由一間隔部152長度加上一頂針部153長度組 成，其中該間隔部152長度是〇.〇5mm，該頂針部153長度 5 1308230 則包括—導角154的0.1mm、一頂出部151(與該等頂針直 從相同）的〇.4mm，及一導角154的0.1mm ;該承靠區16 的長度0.30mm則是由一承靠部161長度加上一導角162組 成’其中該承靠部161長度是〇.2mm，該導角162是 〇· 1mm。換句話說’該鏡片在該半徑方向上必需預留一長度 0.95mm用以容置該頂針區μ與承靠區μ。 如以上述行動電話用鏡頭所内含一鏡片的最小半徑 % h5mm為例，扣除半徑方向上的預留長度0.95mm，則該光 予區14的半控最大值只可達到0.55mm，即使該光學有效 徑141擴大到與該光學區14 一樣，該光闌142也只能擴大 到與該光學區14相等，如此，限縮了該鏡片在光學設計時 的自由度’有時甚至無法滿足整顆鏡頭的設計規格。相反 地’如果該鏡片在光學設計上使用了超過〇_55mrn的光學有 效徑141時’一般做法是放棄以頂針頂出的方式改用一模 仁頂出’如此’會造成該模仁壽命縮短或穩定度不良的現 # 象’另外的做法是限縮該承靠區16的承靠部161徑向長度 ’但會造成承靠上不穩定的現象；目前上述兩種做法皆有 衍生的缺點。 【發明内容】 因此’本發明之目的’即在提供一種減少一半徑方向 上預留給非光線通過的長度並可相對擴大光學有效徑的鏡 片。 於是’本發明可相對擴大光學有效徑的鏡片包含一光 軸、一第一塑形面，及一第二塑形面。該第一塑形面包括 6 1308230 • - 〇 形成在該周緣一内部中並供該光軸通過的光學 . 區風及-介於該周緣與該光學區之間的作用區，其中，該 "品、有光學有效徑，該作用區具有多數呈環狀間隔 排列並由該周緣朝該光軸方向凸出的内派壁，及多數由該 f内弧壁與該周緣相互配合界定出的承靠部，該等承靠部 I沿該料方向突出於該作用區；該第二塑形面是沿該光 • 軸方向上與該第一塑形面相背設置。 • ^本發明之功效在於該作用區中多數環狀間隔排列的承 罪口p之間’適用於在一分模動作中供多數支頂針頂抵，即 每支頂針頂抵的位置是位在於相鄰二個承靠部之間，如 此減少該半徑方向上預留給非光線通過的長度，而擴大光 予區的半徑，即相對地擴大了光學有效徑，確實能達到本 發明之目的。 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 藝以下配合參考圖式之一個較佳實施例的詳細說明中，將可 清楚的呈現。 參閱圖3、圖4,分別是一正視圖與一剖視圖，說明本 發明可相對擴大光學有效徑的鏡片的一較佳實施例，本發 明之鏡片包含一光軸2、一第一塑形面3,及一第二塑形面 4。該第一塑形面3包括一周緣31、及由該光軸2沿一徑向 依序區分成的一光學區32與一作用區33;該第二塑形面4 是延該光軸2方向上與該第一塑形面3相背設置。其中， 該光學區32具有一以光軸2為對稱中心的光學有效徑321 7 1308230 : ，及一由該光學有效徑321環繞區分並供成像光線通過的 圓形光闌（ApertUre)322 ;該作用區33具有四個呈環狀間隔 排列並由該周緣31朝該光軸2方向凸出的内弧壁331、多 數由該等内弧壁331與該周緣31相互配合界定出的承靠部 332，及四個呈環狀間隔排列且介於該等承靠部332之間的 頂出部333，其配置是每二個承靠部332之間容置有一頂出 -部333 ;其中，該等承靠部332是沿該光轴2方向凸出於該 寒 作用區33，而該頂出部333適用於供一頂出裝置（圖未示）頂 抵。而該等内弧壁331各具有一相同的曲率半徑15mm， 其對應的圓心是位在該周面31 —夕卜部，而且該等内弧壁 331是對稱於該光軸2並呈等角度（9()度）配置。 在本實施例中，S以行動電話用㈣所内含一鏡片為 例’該鏡片的直徑是3mm，而為延長該模仁壽命及增加鏡 片製造上的穩定冑，在成型製造過程中的—分模動作時， 使用四頂針（圖未示）頂抵該作用區33的四頂出部333，以便 φ 頂出該鏡片。 ★另外，該等頂出部333只要能夠呈等角度的配置，讓 〜等頂針（圖未示）在分模動作時能均句地頂抵即可，頂出部 333的數量也可以與該等承靠部332的數量是不相同。 以下詳細說明本發明中利用在該作輕33的該等承靠 部332之間容置頂出冑333的配置，以減少一半徑方向上 預留給非光線通過的長度，且相對地擴大該光學有效徑321 ，以及衍生的相關優點： 參閱圖4’為圖3中通過該等頂出部如之切割線4_4 8 1308230 的剖視圖，顯示該鏡片在該半徑 的長度分配，該光 學區心長度是G.9mm，該作用區33的長度是⑽聰， 其令該作用區33的長度0.60_可區分成一導角说的 〇」麵、-頂出部333(與頂針直徑相同）的〇4咖，及一導 角334的〇.lmm所組成；參閱圖5,是圖3令通過該等承 靠部332之切割線5_5的剖視圖，該鏡片在該半徑方向上的 長度分配如下··該光學區32的長度是❹随，該作用區Μ 的長度是0.60_，其中該作用區33的長度〇 6〇咖可區分 成一間隔部335的〇.lmm，及—承靠部如的〇 5麵。 由上述圖4、圖5中可以得知，利用環狀間隔排列的該 等承靠部332之間容置頂出部333,可在該半徑方向上只要 預留一該作用區33的長度〇·6ππη即可，其餘的長度皆可供 該光學區32成像料光線襲，達到相對_线光學有 效徑321的目的。 參閱圖5，值得一提的是，該等承靠部332與該光學區 32之間存在有一間隔區335，使其相互不連接，如此，可 避免該鏡片在成型製造時，產生應力集中在此的現象。 另外，本發明在擴大光學有效徑321下仍採用頂針頂 出方式來製造鏡片’對於當該鏡片光學區32被設計成—非 軸對稱形式的面型時，將不會有類似用模仁頂出方式時， 因非軸對稱而使該光學區32上某一方位區域會與其它方位 區域有受力不均的問題。 歸納上述’本發明可相對擴大光學有效徑的鏡片，利 用％狀間隔排列的該等承靠部332之間容置頂出部333，使 !3〇823〇 得在該徑向上節省下來的長度’可用來放大光學區32，即 可相對擴大光學有效徑321 ’確實能達到本發明之目的。 惟以上所述者，僅為本發明之較佳實施例而已，當不 能以此限定本發明實施之範圍’即大凡依本發明申請專利 範圍及發明說明内容所作之簡單的等效變化與修飾，皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是一種現有光學塑膠鏡片的一正視圖； 圖2是沿圖1中的線2_2所取的一剖視圖，說明現有光 學塑膠鏡片在一半徑方向上各區域的長度分佈； 圖3疋一正視圖，說明本發明可相對擴大光學有效徑 的鏡片的一較佳實施例； 圖4是沿圖3中的線“所取的—剖視圖，說明上述較 佳實施例在一半徑方向上具有一頂出部的各區域長度分佈 ;及 圖5是沿圖3中的線5.5所取的一剖視圖，說明上述較 佳實施例在該半徑方向上具有—承靠部的各區域長度分佈 10 1308230 【主要元件符號說明】 2…… —光軸 331… •…内弧壁 3…… …·第一塑形面 332 ·· •…承靠部 31 •.… •…周緣 333·.. •…頂出部 32…… •…光學區 334… •…導角 321… •…光學有效徑 335… •…間隔部 322… —光闌 4…… •…第二塑形面 33-···. •…作用區1308230 IX. Description of the invention: [Technical field to which the invention pertains] In particular, an optical lens for use in imaging is disclosed in the present invention. [Prior Art] In recent years, 'the ability to add camera functions to mobile phones has become a trend. In order to be able to be installed on mobile phones, the optical lens has gradually reduced its size and the lens contained in the lens has also been reduced. The lens on the mobile phone can even have a lens radius as small as 1 · 5χηηι, so a small lens is more competitive with plastic lenses than glass lenses in terms of manufacturing cost and processing feasibility. Referring to Figures 1 and 2, a prior art optical plastic lens includes an optical axis u, a first molding surface 12, and a second molding surface b. The first molding surface 12 includes an optical zone 14, a thimble zone 15, and a bearing zone 16 which are sequentially separated by the optical axis 11 in a radial direction; wherein the optical zone 14 has an optical effective path 141, and a circular aperture 142 surrounded by the optical effective path 141 for imaging light passage; the thimble region 15 has a plurality of apical pins suitable for use in a parting operation (not shown) Abutting ejector portion 151; the bearing portion 16 is opened in a closed loop and protrudes from the thimble region 15 in the direction of the optical axis. The second molding surface π is disposed opposite to the first molding surface 12 in the direction of the optical axis 。. Referring to Fig. 2', the length of the thimble region 15 is 0.65 mm in a radial direction. The length of a spacer portion 152 is combined with the length of a thimble portion 153. The length of the spacer portion 152 is 〇.〇5 mm. The length 153 1308230 of the portion 153 includes - 0.1 mm of the lead angle 154, 〇. 4 mm of an ejector portion 151 (same as the thimble straight), and 0.1 mm of a lead angle 154; the length of the bearing area 16 0.30 mm is composed of a bearing portion 161 length plus a lead angle 162. The length of the bearing portion 161 is 〇.2 mm, and the lead angle 162 is 〇·1 mm. In other words, the lens must have a length of 0.95 mm in the radial direction for accommodating the thimble area μ and the bearing area μ. For example, if the minimum radius % h5mm of a lens included in the above-mentioned mobile phone lens is taken as an example, and the reserved length in the radial direction is 0.95 mm, the maximum half-control of the light-receiving area 14 can only reach 0.55 mm, even if The optical effective diameter 141 is expanded to be the same as the optical zone 14, and the aperture 142 can only be expanded to be equal to the optical zone 14, thus limiting the degree of freedom of the lens in optical design 'sometimes even unable to meet the entire The design specifications of the lens. Conversely, 'if the lens uses an optical effective diameter 141 of more than 〇55mrn in the optical design', the general practice is to abandon the ejector pin-out method and use a mold to eject the 'so', which will shorten the life of the mold. Or the other method of poor stability is to limit the radial length of the bearing portion 161 of the bearing area 16 but it will cause instability on the bearing; at present, both of the above practices have disadvantages . SUMMARY OF THE INVENTION Therefore, the object of the present invention is to provide a lens which reduces the length of a non-light passage in a radial direction and can relatively expand the optical effective diameter. Thus, the lens of the present invention which relatively expands the optical effective diameter comprises an optical axis, a first molding surface, and a second molding surface. The first molding surface includes 6 1308230 • - an optical field formed in the inner periphery of the circumference and passing through the optical axis. The wind and the active area between the circumference and the optical zone, wherein the " The product has an optical effective diameter, and the active area has a plurality of inner walls which are arranged at an annular interval and protrude from the peripheral edge toward the optical axis direction, and a plurality of inner arc walls and the peripheral edge are mutually defined The bearing portion I protrudes in the direction of the material in the action region; the second molding surface is disposed opposite to the first molding surface along the optical axis direction. • The effect of the present invention is that the majority of the annularly spaced prosthetic ports p in the active area are adapted to abut the majority of the ejector pins in a parting operation, that is, the position of each ejector pin is located. Between the two adjacent abutting portions, the length reserved for the non-light rays in the radial direction is reduced, and the radius of the light-preserving region is enlarged, that is, the optical effective diameter is relatively enlarged, and the object of the present invention can be achieved. The above and other technical contents, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. 3 and FIG. 4 are respectively a front view and a cross-sectional view showing a preferred embodiment of the lens for relatively expanding the optical effective diameter of the present invention. The lens of the present invention comprises an optical axis 2 and a first molding surface. 3, and a second molding surface 4. The first molding surface 3 includes a peripheral edge 31, and an optical zone 32 and an active zone 33 which are sequentially separated by the optical axis 2 in a radial direction; the second shaping surface 4 extends the optical axis 2 The direction is opposite to the first molding surface 3. The optical zone 32 has an optical effective path 321 7 1308230 with a center of symmetry of the optical axis 2, and a circular aperture (ApertUre) 322 surrounded by the optical effective path 321 for imaging light to pass through; The action area 33 has four inner arc walls 331 which are arranged at an annular interval and protrude from the peripheral edge 31 toward the optical axis 2, and a plurality of bearing portions which are defined by the inner arc walls 331 and the peripheral edge 31 cooperate with each other. The ejector portion 333 is disposed between the two abutting portions 332 and is disposed between the two abutting portions 332. The abutting portions 332 protrude from the cold acting region 33 in the direction of the optical axis 2, and the ejecting portion 333 is adapted to be abutted by an ejecting device (not shown). The inner arc walls 331 each have a same radius of curvature of 15 mm, the corresponding center of the circle is located at the peripheral surface 31, and the inner arc walls 331 are symmetric with respect to the optical axis 2 and are equiangular ( 9 () degrees) configuration. In the present embodiment, S uses a lens included in the mobile phone (4) as an example. The diameter of the lens is 3 mm, and in order to extend the life of the mold and increase the stability of the lens manufacturing, during the molding process. During the parting operation, a four ejector pin (not shown) is used to abut the four ejector portions 333 of the action area 33 so that φ ejects the lens. In addition, as long as the ejector portions 333 can be arranged at equal angles, the ejector pins (not shown) can be uniformly offset during the parting operation, and the number of the ejector portions 333 can also be The number of the abutting portions 332 is different. Hereinafter, the configuration for accommodating the ejection hopper 333 between the abutting portions 332 of the light beam 33 in the present invention is described in detail to reduce the length of a radial direction reserved for non-light rays, and the optical is relatively enlarged. Effective diameter 321 , and related advantages of derivation: Referring to Figure 4' is a cross-sectional view through the ejector portions such as the cutting line 4_4 8 1308230 in Figure 3, showing the length distribution of the lens at the radius, the optical zone length is G.9mm, the length of the action zone 33 is (10) Cong, which makes the length of the action zone 33 0.60_ can be divided into a 导 面 face, a ejector 333 (the same diameter as the thimble) And FIG. 5 is a cross-sectional view of the cutting line 5_5 passing through the bearing portions 332. The length of the lens in the radial direction is distributed as follows. The length of the region 32 is ❹, and the length of the active region Μ is 0.60_, wherein the length of the active region 33 can be divided into 〇.lmm of a spacer 335, and the 〇5 surface of the bearing portion . It can be seen from the above-mentioned FIG. 4 and FIG. 5 that the ejector portion 333 is accommodated between the bearing portions 332 arranged in an annular interval, and the length of the action region 33 can be reserved in the radial direction. 6ππη can be used, and the remaining lengths can be used for the optical zone 32 image material to strike, achieving the purpose of the relative optical efficiency 321 of the line. Referring to FIG. 5, it is worth mentioning that there is a space 335 between the abutting portion 332 and the optical zone 32 so as not to be connected to each other, so that the stress concentration of the lens during molding is prevented. This phenomenon. In addition, the present invention still uses the ejector ejection method to manufacture the lens under the enlarged optical effective diameter 321 'When the lens optical zone 32 is designed to be a non-axisymmetric form, there will be no similar die top In the case of the mode, due to the non-axis symmetry, a certain azimuth region on the optical zone 32 may have a problem of uneven force with other azimuth regions. In the above-mentioned lens, the lens of the present invention can relatively expand the optical effective diameter, and the ejector portion 333 is accommodated between the bearing portions 332 arranged in a %-like interval so that the length of the ?3〇823 is saved in the radial direction. It can be used to enlarge the optical zone 32, that is, to relatively expand the optical effective diameter 321 'to achieve the object of the present invention. However, the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention, All remain within the scope of the invention patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a prior art optical plastic lens; FIG. 2 is a cross-sectional view taken along line 2_2 of FIG. 1 illustrating the length distribution of various optical plastic lenses in various regions in a radial direction. Figure 3 is a front elevational view showing a preferred embodiment of the lens of the present invention which can relatively expand the optical effective diameter; Figure 4 is a cross-sectional view taken along line " of Figure 3, illustrating the preferred embodiment of the preferred embodiment a length distribution of each region having an ejector portion in the radial direction; and FIG. 5 is a cross-sectional view taken along line 5.5 of FIG. 3, illustrating that the preferred embodiment has regions in the radial direction - the abutment portion Length distribution 10 1308230 [Description of main component symbols] 2... - Optical axis 331... •... Inner arc wall 3... ...·First shaping surface 332 ·· •...Receiving part 31 •.... •...Circumference 333· .. •... ejector 32... •...optical zone 334... •...guide angle 321... •...optical effective diameter 335... •...spacer 322...-optical 4... •...second shaping surface 33- ···. •...acting area
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