201037290 六、發明說明： 【發明所屬之技術領域】 本發明涉及鏡頭測試技術領域，尤其涉及一種用於鏡頭調制 傳遞函數值測試工藝的鏡頭固持裝置。 【先前技術】 數位相機、攝像機及手機攝像頭等成像設備的影像品質主要 取決於鏡頭的成像品質，而鏡頭的成像品質監控在於鏡頭的測試 過程。調制傳遞函數值(Modulation Transfer Function, MTF)係一種 ^ 分析鏡頭的解像力跟反差再現能力、綜合評價鏡頭的銳度、反差[Technical Field] The present invention relates to the field of lens testing technology, and more particularly to a lens holding device for a lens modulation transfer function value testing process. [Prior Art] The image quality of an imaging device such as a digital camera, a video camera, and a mobile phone camera mainly depends on the imaging quality of the lens, and the imaging quality monitoring of the lens lies in the test process of the lens. Modulation Transfer Function (MTF) is a kind of analysis lens resolution and contrast reproducibility, comprehensive evaluation of lens sharpness, contrast
%J 及解析度的一個重要參數，參見文獻：A simple method for ^ determining the modulation transfer function indigital radiography;%J and an important parameter of the resolution, see the literature: A simple method for ^ determining the modulation transfer function in digital radiography;
Fujita, H., Tsai, D-Y., Itoh, T., Department of Electronic & Computer Engineering, England, Gifu University; Medical imaging, TF.FF,Fujita, H., Tsai, D-Y., Itoh, T., Department of Electronic & Computer Engineering, England, Gifu University; Medical imaging, TF.FF,
transactions on; pages 34〜39, Volume 11，Issue 1，March.1992。MTF 值介於0%至100%之間’通常調MTF值愈高的鏡頭，愈能解析待 測影像裏更細微的變化。 現有MTF值的測量裝置包括鏡頭盤及分別位於鏡頭盤上方及 下方並與鏡頭盤相對的圖像感測器及測試板。該測試板具有複數 〇 間隔排佈的明暗測試條紋。該鏡頭盤設有複數階梯狀通孔，各通❹ 孔用於收容一待測鏡頭。該圖像感測器用於透過置於階梯狀通孔 内的各鏡頭對該間隔排佈的明暗測試條紋成像。各待測鏡頭的 MTF 值由下述公式算得：ΜΤΡΚΙιη3χ_ΙπώιΜΐηΐ3χ+Ιιηΐη)。其中，。 為圖像^測器透過待測鏡頭所感測的最亮條紋的亮度值，Imin為圖 像感測器透過待測鏡頭所感測的最暗條紋的亮度值。測試完畢一 個鏡頭後，需轉動鏡頭盤，直至圖像感測器與下一待測鏡頭相對。 ^然而著電子產品輕薄化的需要，鏡頭製作得越來越輕巧。 巧用現有測量裝置測試小尺寸塑膠鏡頭的MTF值時，該鏡頭易因 靜電吸附力吸附在圖像感測II上。在測試下―鏡頭時，需取走該 3 201037290 •鏡頭二由此花費大量時間，且各待測鏡頭在被吸附過程中與圖像 -感測器發生碰撞，影響圖像感測器靈敏度，引起測試所得的待測 . 鏡頭的MTF值誤差較大，誤將合格的待測鏡頭判斷為不合格品。 ，鑑巧此’提供一種鏡頭固持裝置來避免待測鏡頭被吸附至 圖像感測器上，從而提高MTF值測試效率及測試精度實為必要。 【發明内容】 以下將以實施例為例說明一種固持效果好的鏡頭固持裝置。 該鏡頭固持裝置包括具有腔體的承載裝置及吸氣裝置。該承 ❹載裝置包括頂盍及與頂蓋相對的透明底壁。該頂蓋設有複數與腔 體相通的階梯狀通孔。該吸氣裝置與腔體相通，用於抽取腔體内 的空氣’由此於各階梯狀通孔處產生吸附力。 本技術方案的鏡頭固持裝置採用真空吸附作用原理固定鏡 頭’防止了在測試鏡頭MTF值時鏡頭從階梯狀通孔中脫離出來而 受損或吸附至圖像感測器碰撞圖像感測器，從而提高了測試精度 及測試效率。 【實施方式】 以下結合實施例及附圖詳細說明本技術方案提供的鏡頭固持 ❹ 裝置。 參見圖1，本技術方案第一實施例提供的鏡頭固持裝置1〇〇 包括承載裝置10、與承載裝置1〇相連的導氣件3〇及與導氣件3〇 相連的吸氣裝置20。 承载裝置10包括頂蓋11、與頂蓋11相對的底壁12及位於頂 蓋11與底壁12之間並與頂蓋11及底壁12相連的側壁13。頂蓋 U、底壁12及側壁13相配合圍合形成腔體i(n。頂蓋u包括承 载面111及與承載面111相對的内表面112 ’其開設有複數階梯狀 通孔113。各階梯狀通孔113貫通承載面Hi及内表面112，並與 腔體101相通。該複數階梯狀通孔113呈直線陣列式排列，其用 201037290 111的一端的直 於收容待測鏡頭，且階梯狀通孔113靠近承載面 徑較大。 翻材料製成，優選光透過率較高的材料，如聚甲 曰鏡頭MTF值時’不阻礙圖像感測器透過 1見員及底土 12制试板上的明暗條紋成像。側壁13言史有鱼腔體 3 =的排氣通孔（圖未示）’導氣件3〇通過該排氣通孔與腔體 lUi相通。 ❹ ❹ 導氣件30呈官狀，其用以於承載農置1〇的腔體1〇 空氣通道，職吸氣裝置2G對綱的真空吸附力。 裝置20具有抽氣功能，其通過導氣件30抽取腔體101 内的工亂。當制鏡頭收容於階梯狀通孔113内時，承載裝置10 由與外界相通的狀態轉為封閉狀態，吸氣裝置20抽取 1 使得腔體101内處於真空狀態，*此於階梯 二*產生侧於制鏡__力，從而將測鏡頭穩 固的固持在階梯狀通孔113内。 此外，本實施例提供的承載裝置1〇的結構不限於此，只要且 =體101，並設有與腔體101相通的階梯狀通孔113及由透明^ ΐίΐίΐ壁12 ’便於利用真空吸附原理吸附待測鏡頭及不阻擔 ，像感應g透過紐12制試板上的明暗條紋絲即可。階梯狀 、孔113可呈同心圓狀陣列或其他任何幾何圖形陣列排佈。導氣 件30可省略，對應地’吸氣裝置2〇直接與承載装f 1〇相連通。 本實施例的鏡頭固持裝置卿採用真空吸附作用原理固定鏡 ，，防止了在測试鏡頭MTF值時鏡頭從階梯狀通孔113中脫離出 士而受損或吸附至圖像感測器碰撞圖像感測器，從而提高了測試 精度及測試效率。 請:併參見圖2至圖4,與鏡頭固持裝置咖相比，本技術方 ，、第一貫施例提供的鏡頭固持裝置2〇〇中，承載裝置21〇僅包括 頂蓋211及紐212。頂蓋211具有承載面灿、與承載面2111 201037290 相對的内表面2112及位於承載面2111與内表面2112之間並與承 載面2111及内表面2112相連的侧表面2114。内表面2112貼合於 底壁 212。 、口、 ❹ Ο 頂蓋210自内表面2112向内部開設有複數直條狀導氣槽。具 體地，本實施例中，該複數導氣槽包括複數第一導氣槽21〇1及^ 個第一導氣槽2102。第一導氣槽2101呈直線陣列式排列，且與複 數階梯狀通孔2113相通。兩第二導氣槽2102與各第一導氣槽^〇1 相父於第一導氣槽2101的兩端部，且一端部還貫通側表面2114， 即’兩第一導氣槽2102均與外界相通。由此，第一導氣槽21〇1 ，第二導氣槽2102相互配合地與所有階梯狀通孔2113相通。吸 氣裝置220通過兩個管狀導氣件23〇與承載裝置21〇的 導氣槽2102相連通。 ^外’第一導氣槽2101及第二凹槽21〇2的形狀並不限於此。 複數第-導氣槽21G1還可按任賴何形狀排列，如同心圓阵列， 置—讎—端端部貫_表面2114並與所有階梯狀通孔 =1目=第二導氣槽2102,進一步地，可僅僅設置一個導氣槽， =見圖5，與鏡頭固持裝置2〇〇 *同之處在於，本技術 供的鏡賴持裝置3()G中，承載裝置31G還包括側 。頂盖311、侧壁313及底μ 312相互配合圍合形成腔體观。 ，二，參閱圖6、7 ’與鏡頭固持裝置3〇〇相比，本技術方案 鏡頭固持裝置中，承載裝置410 _壁似3 ί f孔4131，導氣槽樣1與所有_狀通孔4113相通， 匕二二:广表面乂m。導氣件43❹的—端收容於該排氣通 的氣Ϊ 420通過導氣件抽取腔體401内 利申ί上Ϊ述，本發明確6符合發明翻之要件，遂依法提出專 Α月。惟，以上所述者僅為本發明之較佳實施方式，自不能^ 201037290 【圖式簡單說明】 ®為本技術方案第一實施例提供的鏡頭固持裝置的分解示 圖為本技術方案第二實施例提供的鏡頭固持裝置的示意圖。 圖3為圖2所示鏡頭畴裝置的分解示意圖。 圖4為圖2所示鏡顧持裝置的承餘置的示意圖。 圖5為本技術方案第三實細提供的鏡頭畴裝置的分解示 〇 圖6為本技術方案第四實施例提供的鏡頭固持裝置的分解示 圖7為圖6所示鏡頭固持裝置的承載裝置的示意圖。 【主要元件符號說明】 鏡頭固持裝置 100、200、300、400 承載裝置 10、210、310、410 導氣件 30、230、430 吸氣裝置 20、220、420 頂蓋 11、211、311 底壁 12、212、312 側壁 13、313、413 腔體 101、301、401 承載面 111 、 2111 内表面 112、2112 階梯狀通孔 113 侧表面 2114 、 4114 201037290 第一導氣槽 2101 第二導氣槽 2102 階梯狀通孔 2113 排氣通孔 4131 導氣槽 4101 4113 Ο Ο 〇 ΟTransactions on; pages 34~39, Volume 11, Issue 1, March. The MTF value is between 0% and 100%. The higher the MTF value is, the better the resolution of the more subtle changes in the image to be measured. The existing MTF value measuring device includes a lens disk and an image sensor and a test board respectively located above and below the lens disk and opposite to the lens disk. The test board has a plurality of light and dark test strips spaced apart. The lens disk is provided with a plurality of stepped through holes, and each of the through holes is for receiving a lens to be tested. The image sensor is used to image the spaced dark and dark test strips through the lenses placed in the stepped through holes. The MTF value of each lens to be tested is calculated by the following formula: ΜΤΡΚΙιη3χ_ΙπώιΜΐηΐ3χ+Ιιηΐη). among them,. The brightness value of the brightest stripe sensed by the image detector through the lens to be tested, and Imin is the brightness value of the darkest stripe sensed by the image sensor through the lens to be tested. After testing one lens, turn the lens disk until the image sensor is opposite the next lens to be tested. However, with the need for thinner electronic products, the lens is made lighter and lighter. When using the existing measuring device to test the MTF value of a small-sized plastic lens, the lens is easily adsorbed on the image sensing II by electrostatic adsorption. When testing the lens, the 3 201037290 is needed. • The lens 2 takes a lot of time, and each lens to be tested collides with the image-sensor during the adsorption process, affecting the sensitivity of the image sensor. The test results are to be tested. The MTF value of the lens has a large error, and the qualified lens to be tested is judged as a non-conforming product by mistake. It is necessary to provide a lens holding device to prevent the lens to be tested from being adsorbed onto the image sensor, thereby improving the MTF value test efficiency and test accuracy. SUMMARY OF THE INVENTION Hereinafter, a lens holding device with good holding effect will be described by taking an embodiment as an example. The lens holding device includes a carrier device having a cavity and a getter device. The load carrying device includes a top cymbal and a transparent bottom wall opposite the top cover. The top cover is provided with a plurality of stepped through holes communicating with the cavity. The getter device is in communication with the cavity for extracting air from the chamber, thereby generating an adsorption force at each of the stepped through holes. The lens holding device of the technical solution fixes the lens by the principle of vacuum adsorption, which prevents the lens from being detached from the stepped through hole when the MLF value of the test lens is damaged or adsorbed to the image sensor collision image sensor. Thereby improving test accuracy and test efficiency. [Embodiment] Hereinafter, a lens holding device provided by the present technical solution will be described in detail with reference to the embodiments and the accompanying drawings. Referring to Fig. 1, a lens holding device 1A according to a first embodiment of the present invention includes a carrying device 10, a gas guiding member 3A connected to the carrying device 1A, and a getter device 20 connected to the air guiding member 3A. The carrying device 10 includes a top cover 11, a bottom wall 12 opposite the top cover 11, and a side wall 13 between the top cover 11 and the bottom wall 12 and connected to the top cover 11 and the bottom wall 12. The top cover U, the bottom wall 12 and the side wall 13 are cooperatively formed to form a cavity i (n. The top cover u includes a bearing surface 111 and an inner surface 112 ′ opposite to the bearing surface 111. The plurality of stepped through holes 113 are opened. The stepped through hole 113 penetrates the bearing surface Hi and the inner surface 112 and communicates with the cavity 101. The plurality of stepped through holes 113 are arranged in a linear array, and one end of the 201037290 111 is used to receive the lens to be tested, and the step is The shape of the through hole 113 is close to the bearing surface. The material is made of a material, preferably a material with a high light transmittance, such as the MTF value of the polymethacrylate lens, which does not hinder the image sensor from passing through the 1st and the subsoil 12 test. The light and dark stripes on the board are imaged. The side wall 13 has a fish chamber 3 = exhaust through hole (not shown) 'the air guide member 3' communicates with the cavity lUi through the exhaust through hole. ❹ ❹ Air guide 30 is an official shape, which is used for carrying a 1 inch air passage of a chamber, and a vacuum suction force of a 2G pair of suction devices. The device 20 has a pumping function, which extracts a cavity through the air guide 30. Work mess in 101. When the lens is housed in the stepped through hole 113, the carrying device 10 is externally The state is changed to the closed state, and the air suction device 20 draws 1 so that the cavity 101 is in a vacuum state, and the step 2 is generated on the side of the mirror __ force, thereby firmly holding the measuring lens in the stepped through hole 113. In addition, the structure of the carrying device 1〇 provided by the embodiment is not limited thereto, as long as the body 101 is provided with a stepped through hole 113 communicating with the cavity 101 and the vacuum is used to facilitate the use of the vacuum. The adsorption principle adsorbs the lens to be tested and does not resist, like the sensing g through the light and dark stripe on the test panel of the New 12. The stepped shape, the hole 113 can be arranged in a concentric circular array or any other geometric pattern array. The member 30 can be omitted, correspondingly the 'suction device 2 〇 directly communicates with the carrying device f 1 。. The lens holding device of the embodiment uses a vacuum adsorption principle to fix the mirror, and prevents the lens when testing the lens MTF value. It is damaged or adsorbed to the image sensor collision image sensor from the stepped through hole 113, thereby improving the test accuracy and the test efficiency. Please: See also Figure 2 to Figure 4, and hold the lens Compared with the device, this technology In the lens holding device 2 provided by the first embodiment, the carrying device 21A includes only the top cover 211 and the button 212. The top cover 211 has a bearing surface, an inner surface 2112 opposite to the bearing surface 2111 201037290, and The side surface 2114 is located between the bearing surface 2111 and the inner surface 2112 and is connected to the bearing surface 2111 and the inner surface 2112. The inner surface 2112 is attached to the bottom wall 212. The mouth, the top cover 210 is opened from the inner surface 2112 to the inside. There are a plurality of straight air guiding grooves. Specifically, in the embodiment, the plurality of air guiding grooves include a plurality of first air guiding grooves 21〇1 and a first first air guiding groove 2102. The first air guiding grooves 2101 are arranged in a linear array and communicate with the plurality of stepped through holes 2113. The two second air guiding grooves 2102 and the first air guiding grooves 1 are disposed at both ends of the first air guiding groove 2101, and one end portion also penetrates the side surface 2114, that is, both the first air guiding grooves 2102 Connect with the outside world. Thereby, the first air guiding groove 21〇1 and the second air guiding groove 2102 are in communication with each of the stepped through holes 2113. The suction device 220 communicates with the air guiding groove 2102 of the carrying device 21 through the two tubular air guiding members 23A. The shape of the outer air guide groove 2101 and the second groove 21〇2 is not limited thereto. The plurality of air-guiding grooves 21G1 may also be arranged in any shape, such as a circle array, with the end-end surface _ surface 2114 and all the stepped through holes = 1 mesh = the second air guiding groove 2102, Further, only one air guiding groove can be provided, = see FIG. 5, which is the same as the lens holding device 2 〇〇 *, in the mirror holding device 3 () G provided by the present technology, the carrying device 31G further includes a side. The top cover 311, the side wall 313 and the bottom μ 312 are fitted together to form a cavity view. Second, referring to Figures 6 and 7 'Compared with the lens holding device 3 ,, in the lens holding device of the present invention, the carrying device 410 _ wall like 3 ί f hole 4131, air guiding groove sample 1 and all _ shaped through holes 4113 is connected, 匕22: wide surface 乂m. The air enthalpy 420 of the air guiding member 43 is received in the air venting chamber 401 through the air guiding member. The invention is in accordance with the invention, and the invention is in accordance with the law. However, the above description is only a preferred embodiment of the present invention, and the following is an exploded view of the lens holding device provided by the first embodiment of the present technical solution. A schematic diagram of a lens holding device provided by the embodiment. 3 is an exploded perspective view of the lens domain device shown in FIG. 2. 4 is a schematic view of the rest of the mirror holding device shown in FIG. 2. FIG. 5 is an exploded perspective view of a lens holding device according to a third embodiment of the present invention. FIG. 6 is an exploded view of the lens holding device according to a fourth embodiment of the present invention. FIG. Schematic diagram. [Main component symbol description] Lens holding device 100, 200, 300, 400 Carrier device 10, 210, 310, 410 Air guiding member 30, 230, 430 Suction device 20, 220, 420 Top cover 11, 211, 311 Bottom wall 12, 212, 312 side wall 13, 313, 413 cavity 101, 301, 401 bearing surface 111, 2111 inner surface 112, 2112 stepped through hole 113 side surface 2114, 4114 201037290 first air guiding groove 2101 second air guiding groove 2102 stepped through hole 2113 exhaust through hole 4131 air guide groove 4101 4113 Ο Ο 〇Ο