200914794 九、發明說明： 【發明所屬之技術領域】 本發明涉及一種測厚儀，尤其涉及一種用於測量透鏡 中心肉厚之透鏡測厚儀。 【先前技術】 近年來，隨著光學產品之發展，光學透鏡之應用範圍 持續擴大，如數碼相機、具有照相功能之手機等。該光學 透鏡以及包括有光學透鏡之鏡頭模組需要很高之精密性。 光學透鏡通常採用注射成型。採用注射成型生產產品，大 大提高生產效率及產量，降低成本。 生產過程中，透鏡於完成注射成型後需要檢測其中心 肉厚以確保產品之精度。如Tomas Fischer等人於2006年 IEEE系統、儀器及檢測技術之國際研討會（Instrumentation and Measurement Technology Conference)上發表之論文 A Novel Optical Method of Dimension Measurement of Objects with Circular Cross-section中揭示了 一種透鏡等光學元件 之高度檢測方法。 請參閱圖1，目前，生產過程中通常採用接觸式表面輪 廓儀50,其係利用一探針502接觸一透鏡52表面並於透鏡 52表面移動，然後計算移動過程中最高點與最低點之差值 求得透鏡52之中心肉厚。然而，接觸式表面輪廓儀50價 格昂貴，且當透鏡52容易放置傾斜，造成測量誤差。 請參閱圖2，也有採用高度規60來測量透鏡52之中心 肉厚。高度規60包括一測量承載臺604與一接觸頭602， 5 200914794 :時，將透鏡52放置 .面與承載臺6〇4接觸， 604上，透鏡52之-表 ™表面接觸，此時高产颊』602之端面與透鏡52之另 之間之距離數值，即：透鏡二：載臺_與接觸頭6〇2 然而’-般承載臺6〇4# 肉厚。 平面，測量透鏡52日士，、面與接觸頭602之端面皆為 成測量誤差；另外 ^將透鏡52有效固定，容易造 透鏡52表面之接觸：至6〇4表面及接觸頭6〇2端面與 面接觸時易it較小’當接觸頭_ 【發二成透鏡52局部受力變形’使測量精度變差。 儀。有鑒於此’有必要提供—種測量精度較高之透鏡測厚 測厂；？Ξ鏡:則厚儀，用於測量透鏡之中心肉厚，該透鏡 透it二：頭及與接觸頭相對之透鏡承載體。該 ^鏡承載體用於承載該透鏡，該接觸頭用於配合該透鏡承 载體將該透鏡固持於該接觸頭與透鏡承載體之間。該接觸 頭，有一第一吻合面，該透鏡承載體具有一第二吻合面。 =第一吻合面與第二吻合面正對，該第一吻合面及第二吻 5面刀別具有與該透鏡之兩相對表面相吻合之形狀。於測 量透鏡之中心肉厚時，該第一吻合面及第二吻合面分別與 透鏡之兩相對表面緊密接觸。 、 相對於先前技術，該透鏡測厚儀採用了接觸頭與透鏡 承載體，該接觸頭及透鏡承載體分別具有與透鏡之兩相對 表面相吻合之第一吻合面及第二吻合面，於測量透鏡中心 200914794 肉厚時，該第一吻合面及第二吻合面分別與透鏡之兩相對 表面緊密接觸。使用該透鏡測厚儀測量透鏡時，透鏡之受 力面積較大，從而可避免透鏡局部受力產生形變而造成之 測量誤差。 【實施方式】 下面將結合附圖，對本發明作進一步之詳細說明。 請參閱圖3至圖5,本發明第一實施例提供一種透鏡測 厚儀10，用於測量一透鏡18之中心肉厚，本實施例中該透 鏡18為雙凸透鏡，其具有兩相對表面182與184。該透鏡 測厚儀10包括：一個承載臺11，一個垂直固定於該承載臺 11上之支架12，一個設置於該支架12上之傳動裝置13， 一個與傳動裝置13連接之接觸頭15，一個設置於承載臺 11上且位置與接觸頭15相對之透鏡承載體16，以及一個 與傳動裝置13電連接之控制裝置17。 該承載臺11具有一承載面111，該透鏡承載體16設置 於該承載面111。該支架12内設置一滑軌121，該滑軌121 之延伸方向與該承載面111垂直，該支架12外侧設置一安 裝部122，該安裝部122用於固定安裝該傳動裝置13。 該傳動裝置13包括一驅動機構20及一從動機構30。 該驅動機構20包括一個齒輪21、一個齒條22以及一台電 機23。該電機23與齒輪21連接，該電機23與齒輪21固 定於安裝部122上；該齒條22嵌設於滑軌内並可沿滑執121 滑動，齒條22之另一侧與齒輪21互相嚙合。該從動機構 30與齒條22之一端連接。該傳動裝置13之工作原理如下： 7 200914794200914794 IX. Description of the Invention: [Technical Field] The present invention relates to a thickness gauge, and more particularly to a lens thickness gauge for measuring the center thickness of a lens. [Prior Art] In recent years, with the development of optical products, the application range of optical lenses has continued to expand, such as digital cameras and mobile phones with camera functions. The optical lens and the lens module including the optical lens require high precision. Optical lenses are typically injection molded. Injection molding is used to produce products that greatly increase production efficiency and output, and reduce costs. During the production process, the lens needs to be tested for its center thickness after injection molding to ensure the accuracy of the product. A lens, etc. is disclosed in A Novel Optical Method of Dimension Measurement of Objects with Circular Cross-section by Tomas Fischer et al., 2006 Instrumentation and Measurement Technology Conference. Height detection method for optical components. Referring to FIG. 1, at present, a contact surface profiler 50 is generally used in the production process, which uses a probe 502 to contact the surface of a lens 52 and move on the surface of the lens 52, and then calculates the difference between the highest point and the lowest point during the movement. The value determines the center flesh thickness of the lens 52. However, the contact surface profiler 50 is expensive, and when the lens 52 is easily placed tilted, measurement errors are caused. Referring to Figure 2, a height gauge 60 is also used to measure the center thickness of the lens 52. The height gauge 60 includes a measuring carrying platform 604 and a contact head 602, 5 200914794: when the lens 52 is placed, the surface is in contact with the carrying table 6〇4, and on the 604, the surface of the lens 52 is in contact with the surface of the watch. The distance between the end face of the 602 and the lens 52, that is, the lens 2: the stage _ and the contact head 6 〇 2, however, the 'normal carrier table 6 〇 4 # is thick. The plane, the measuring lens 52, and the end faces of the surface and the contact head 602 are all measurement errors; in addition, the lens 52 is effectively fixed, and the contact of the surface of the lens 52 is easily made: to the surface of 6〇4 and the end face of the contact head 6〇2 When it is in contact with the surface, it is easy to be smaller. 'When the contact head _ [the partial deformation of the lens of the second lens 52] makes the measurement accuracy worse. instrument. In view of this, it is necessary to provide a lens measuring and measuring factory with high measurement accuracy; Ξ Mirror: The thick gauge is used to measure the center thickness of the lens. The lens is transparent to the head: the lens carrier opposite to the contact head. The mirror carrier is for carrying the lens, and the contact head is for supporting the lens carrier to hold the lens between the contact head and the lens carrier. The contact head has a first mating surface and the lens carrier has a second mating surface. = the first mating surface is opposite the second mating surface, and the first mating surface and the second kiss surface have a shape that matches the opposite surfaces of the lens. When the center of the lens is measured, the first and second matching surfaces are in close contact with the opposite surfaces of the lens. Compared with the prior art, the lens thickness gauge adopts a contact head and a lens carrier, and the contact head and the lens carrier respectively have a first matching surface and a second matching surface which are matched with the opposite surfaces of the lens, and are measured. When the lens center 200914794 is thick, the first and second matching surfaces are in close contact with the opposite surfaces of the lens. When the lens is measured by the lens thickness gauge, the force area of the lens is large, so that the measurement error caused by the local deformation of the lens can be avoided. [Embodiment] Hereinafter, the present invention will be further described in detail with reference to the accompanying drawings. Referring to FIG. 3 to FIG. 5, a first embodiment of the present invention provides a lens thickness gauge 10 for measuring the center thickness of a lens 18. In this embodiment, the lens 18 is a lenticular lens having two opposing surfaces 182. With 184. The lens thickness gauge 10 includes: a carrier 11 , a bracket 12 vertically fixed to the carrier 11 , a transmission 13 disposed on the bracket 12 , and a contact 15 connected to the transmission 13 , A lens carrier 16 disposed on the carrier 11 and opposite the contact head 15 and a control device 17 electrically coupled to the transmission 13 are provided. The carrier 11 has a bearing surface 111 on which the lens carrier 16 is disposed. A sliding rail 121 is disposed in the bracket 12, and the sliding rail 121 extends perpendicularly to the bearing surface 111. A mounting portion 122 is disposed outside the bracket 12 for fixing the transmission device 13. The transmission device 13 includes a drive mechanism 20 and a follower mechanism 30. The drive mechanism 20 includes a gear 21, a rack 22, and a motor 23. The motor 23 is coupled to the gear 21, and the motor 23 and the gear 21 are fixed to the mounting portion 122; the rack 22 is embedded in the slide rail and slidable along the slide 121, and the other side of the rack 22 is in mesh with the gear 21. . The follower mechanism 30 is coupled to one end of the rack 22. The working principle of the transmission device 13 is as follows: 7 200914794
.電機23驅動齒輪21轉動，齒輪21帶動齒條22 >VL .滑動，齒條22帶動從動機構3〇沿垂直 ^:切 作升降運動。 八戰至之方向 該控制裝置17包括-控制電路（圖未示）、_立 171及複數操作按紐。該控制電路用於控制電機23之= Γ7ΓΓ齒I22之移動距離並將該移動距離傳送至顯示Ϊ ”.，不，齒輪21轉動一周，齒條22即移動齒輪釘之— =周長之距離，因此可通過檢測齒輪21轉動周數來二 :22移動距離。齒條22沿遠離或靠近承載臺二 ,J 卩71之頃數分別增加或減小。該複數操作赴 連 =歸零-172、慢速上升峨、慢速下降輪、： 171 ^之:5及快速下降-m ’歸零紐172用於將顯示部 快速1:Π立歸零’慢速上升紐173、慢速下降㈣、 進r相廡、丑5及快速下降紐17 6分別用於使從動機構3 〇 示；等了之動作。可理解’該顯示部171還可為指針式顯 3〇通亥過^文頭之一端部152與傳動裝置13之從動機構 15作升降動從動機構3〇之升降可帶動接觸頭 16正對。兮接觸，頭15之另一端部154與透鏡承載體 可為盆他方Γ 端部152與傳動裝置13之連接還 拆卸即可/〜、要接觸頭15可從傳動裝置U上方便地 田使用透鏡測厚儀10測量透鏡18中心肉 200914794 厚時，該透鏡承載體16與承載臺11位置固定，當測量另 一種不同規格之透鏡時，透鏡承載體16可被取下並更換為 對應於該另一規格透鏡之透鏡承載體。本實施例中透鏡承 '載體16與承載臺11通過螺釘19加以固定。 該接觸頭15之端部154具有一第一端部表面1542,透 鏡承載體16具有一第二端部表面162,該第二端部表面162 與第一端部表面1542相對。於第一端部表面1542與第二 端部表面162分別開設有接觸槽1544與承載槽164，該接 觸槽1544與承載槽164分別具有第一吻合面1546與第二 吻合面166，該第一吻合面1546與第二吻合面166正對。 該第一吻合面1546及第二吻合面166分別具有與透鏡18 之兩個相對表面182及184之部分表面吻合之形狀，第一 吻合面1546及第二吻合面166分別用於與表面182及184 之部分表面緊密接觸（見圖3)，且第一吻合面1546及第二 吻合面166之中心與透鏡之表面182及184之中心相對應。 可理解，第一吻合面1546及第二吻合面166也可設計成分 別與表面182及184之全部表面吻合之形狀，並不限於本 實施例。 如圖6所示，使用透鏡測厚儀10測量透鏡18之中心 肉厚時，第一吻合面1546及第二吻合面166分別與透鏡18 之兩個相對表面182及184緊密接觸，此時第一端部表面 1542之與第二端部表面162之之間之距離為W1，第一吻 合面1546之中心與第一端部表面1542之間之距離為W2， 第二吻合面166之中心與第二端部表面162之間之距離為 9 200914794 W3，則透鏡18之中心肉厚W0為W0=W1+W2+W3。需要 說明，第一吻合面1546及第二吻合面166之參數與透鏡18 之設計參數相同，第一吻合面1546與第二吻合面166可通 過超精密加工制得，距離W2與W3之值可於第一吻合面 1546與第二吻合面166加工完畢後測量獲得。 請一併參閱圖3至圖6，採用該透鏡測厚儀10測量該 透鏡18之中心肉厚之測量方法包括如下步驟： 1) 通過操作控制裝置17上之按鈕使接觸頭15之第一 端部表面1542與透鏡承載體16之第二端部表面162相接 觸，待顯示部171之讀數不發生變化時，觀察讀數係否為 零，如果讀數不為零，操作歸零鈕172使顯示部171之讀 數為零。 2) 操作控制裝置17將接觸頭15遠離透鏡承載體16, 將透鏡18放置於透鏡承載體16上並使第二吻合面166與 透鏡18之表面184緊密接觸。 3) 操作控制裝置17使接觸頭15下降至與透鏡18之 表面182緊密接觸，此時顯示部171之讀數為第一端部表 面1542與第二端部表面162之間之距離，即W1，將預先 已經測得之上述距離W2及W3之值與W1加總，即可得出 透鏡18之中心肉厚W0。 本實施例之透鏡測厚儀10採用了接觸頭15與透鏡承 載體16，該接觸頭15及透鏡承載體16分別具有與透鏡18 之兩相對表面182及184相吻合之第一吻合面1546及第二 吻合面166，於使用透鏡測厚儀10測量透鏡18之中心肉厚 200914794 變，二表面182及184受力面積較大，不易產生形 -差.另外技透鏡18局部受力產生形變而造成之測量誤 ^另夕卜，接觸頭15與透鏡承載體16可拆卸，因此 透鏡18之表面形狀之不同而隨意更換。 又 (未 、兄8之配δ。該接觸頭45具有第一吻合面 -::二第鏡承載體46具有第二吻合面(未標示)，該第 且面分別與透鏡48之兩相對表面吻合， °面及第二吻合面之中心'分別與透鏡之兩相對 面，因此顯示部17 勿δ ®分別為凸 i /J·之3貝數即為透鏡48之中心肉厚。 中心ΪΓΓΓ厚儀還可用於測量其他形式之透鏡之 逢二玉 表面為波浪形之透鏡等，只需將接觸頭及 透鏡承載體之第一吻合面及筮-咖人工\ 伐沏貝及 之兩相對表面吻合之形狀即可口 成與透鏡 雜、晋广β 乃外接觸碩與透鏡承載 體於遊標高度規，或其他通過翻頭與透鏡承載 = 中心肉厚之 、里、亚不限於本實施例之透鏡測厚儀1〇。 提出明辱已符合發明專利之要件，遂依法 利申"。惟’以上所述者僅為本發明之較佳實施方 二自此限制杨之U專利㈣。舉 =一:趣之精神所作之等效修飾或變化，皆 應涵盍於以下申請專利範圍内。 【圖式簡單說明】 11 200914794 圖1係先前技術接觸式表面輪廓儀與透鏡配合示意圖。 圖2係先前技術高度規與透鏡配合示意圖。 圖3係本發明第一實施例透鏡測厚儀之結構示意圖。 圖4係圖1所示透鏡測厚儀之俯視示意圖。 圖5係圖1所示透鏡測厚儀與雙凸透鏡配合示意圖。 圖6係圖5之VI-VI方向之截面示意圖。 圖7係本發明第二實施例之透鏡測厚儀與雙凹透鏡之 配合示意圖。 【主要元件符號說明】 透鏡測厚儀 10 滑執 121 支架 12 安裝部 122 傳動裝置 13 端部 152 ， 154 接觸頭 15，45 第二端部表面 162 透鏡承載體 16，46 承載槽 164 控制裝置 17 第二吻合面 166 透鏡 18，48 顯示部 171 通過螺釘 19 歸零紐 172 驅動機構 20 慢速上升鈕 173 齒輪 21 慢速下降鈕 174 齒條 22 快速上升钮 175 電機 23 快速下降鈕 176 從動機構 30 表面 182 ， 184 承載面 111 第一端部表面 1542 第一吻合面 1546 接觸槽 1544 12 11 200914794 承載臺 13The motor 23 drives the gear 21 to rotate, and the gear 21 drives the rack 22 > VL to slide. The rack 22 drives the follower mechanism 3 to move up and down along the vertical direction. The direction of the eight wars The control device 17 includes a control circuit (not shown), a _ stand 171, and a plurality of operation buttons. The control circuit is used to control the moving distance of the motor 23 = Γ 7 ΓΓ I22 and transmit the moving distance to the display ” ”. No, the gear 21 rotates one revolution, and the rack 22 moves the gear nail — the distance of the circumference, so By detecting the number of revolutions of the gear 21, the moving distance is two: 22. The rack 22 is increased or decreased along the distance from the loading platform 2, J 卩 71. The complex operation goes to the connection = return to zero - 172, slow speed Rising 峨, slow down wheel,: 171 ^: 5 and fast descent - m 'return to zero 172 for quick display of the display 1: stand up to zero 'slow increase NZ, 173, slow down (four), enter r The opposite phase, the ugly 5, and the fast-down button 17 are respectively used to make the slave mechanism 3 display; the action is waited for. It can be understood that the display portion 171 can also be a pointer type display. The lifting and lowering of the follower mechanism 152 with the follower mechanism 15 of the transmission device 13 can drive the contact head 16 to face the 兮 contact. The other end portion 154 of the head 15 and the lens carrier can be the other end portion 152. The connection with the transmission device 13 can also be disassembled/~, and the contact head 15 can be conveniently accessed from the transmission U. When using the lens thickness gauge 10 to measure the lens 18 center meat 200914794 thick, the lens carrier 16 and the carrier 11 are fixed in position. When measuring another lens of different specifications, the lens carrier 16 can be removed and replaced. The lens carrier of the other size lens. In this embodiment, the lens carrier 'carrier 16 and the carrier 11 are fixed by screws 19. The end portion 154 of the contact head 15 has a first end surface 1542, the lens carrier 16 has a second end surface 162 opposite the first end surface 1542. The first end surface 1542 and the second end surface 162 are respectively provided with a contact groove 1544 and a bearing groove 164. The contact groove 1544 and the bearing groove 164 respectively have a first matching surface 1546 and a second matching surface 166, and the first matching surface 1546 is opposite to the second matching surface 166. The first matching surface 1546 and the second matching surface 166 Each having a shape that conforms to a portion of the surfaces of the opposing surfaces 182 and 184 of the lens 18, the first mating surface 1546 and the second mating surface 166 are in close contact with portions of the surfaces 182 and 184, respectively (see Figure 3). First matching surface 1 The center of the 546 and second mating faces 166 corresponds to the centers of the surfaces 182 and 184 of the lens. It will be appreciated that the first mating face 1546 and the second mating face 166 can also be designed to conform to the entire surface of the surfaces 182 and 184, respectively. The shape is not limited to the embodiment. As shown in Fig. 6, when the center thickness of the lens 18 is measured using the lens thickness gauge 10, the first matching surface 1546 and the second matching surface 166 are respectively opposite to the lens 18 182 and 184 are in close contact, and the distance between the first end surface 1542 and the second end surface 162 is W1, and the distance between the center of the first matching surface 1546 and the first end surface 1542 is W2. The distance between the center of the second matching surface 166 and the second end surface 162 is 9 200914794 W3, and the center flesh thickness W0 of the lens 18 is W0=W1+W2+W3. It should be noted that the parameters of the first matching surface 1546 and the second matching surface 166 are the same as the design parameters of the lens 18. The first matching surface 1546 and the second matching surface 166 can be obtained by ultra-precision processing, and the values of the distances W2 and W3 can be After the first matching surface 1546 and the second matching surface 166 are processed, the measurement is obtained. Referring to FIG. 3 to FIG. 6 together, the method for measuring the center flesh thickness of the lens 18 by using the lens thickness gauge 10 includes the following steps: 1) making the first end of the contact head 15 by operating a button on the control device 17. The surface 1542 is in contact with the second end surface 162 of the lens carrier 16. When the reading of the portion to be displayed 171 does not change, the observation reading is zero. If the reading is not zero, the zero button 172 is operated to display the display portion. The reading of 171 is zero. 2) The operation control device 17 moves the contact head 15 away from the lens carrier 16, places the lens 18 on the lens carrier 16, and brings the second matching surface 166 into close contact with the surface 184 of the lens 18. 3) The operation control device 17 lowers the contact head 15 into close contact with the surface 182 of the lens 18, at which time the reading of the display portion 171 is the distance between the first end surface 1542 and the second end surface 162, that is, W1, The center flesh thickness W0 of the lens 18 is obtained by summing the values of the above-mentioned distances W2 and W3 which have been previously measured and W1. The lens thickness gauge 10 of the present embodiment employs a contact head 15 and a lens carrier 16, the contact head 15 and the lens carrier 16 respectively having a first matching surface 1546 that coincides with the opposite surfaces 182 and 184 of the lens 18 and The second matching surface 166 is used to measure the center thickness of the lens 18 by using the lens thickness gauge 10, and the two surfaces 182 and 184 have a large force area, which is not easy to produce shape-difference. In addition, the lens 18 is partially deformed by force. The measurement error caused by the contact lens 15 and the lens carrier 16 are detachable, so that the surface shape of the lens 18 is freely changed. Further (not, brother 8 is matched with δ. The contact head 45 has a first matching surface-:: the second mirror carrier 46 has a second matching surface (not labeled), and the second surface is opposite to the lens 48, respectively The anastomosis, the center of the ° surface and the second matching surface are respectively opposite to the two faces of the lens, so that the display portion 17 is not δ ® respectively, and the convex number i / J · 3 is the center thickness of the lens 48. The instrument can also be used to measure the lens of other forms of lens, such as a wave-shaped lens, etc., and only need to match the first matching surface of the contact head and the lens carrier with the opposite surface of the 筮-咖人工\ The shape can be made into a lens, the Jinguang β is externally contacted with the lens carrier and the vernier height gauge, or the other is carried by the tumbling and lens = central flesh thickness, and the lens is not limited to the lens of the embodiment. Thickness meter 1 提出. Proposal of insults has met the requirements of the invention patent, 遂法利申". 'The above is only the preferred embodiment of the invention. Secondly, Yang’s U patent (4) has been restricted since then. : Equivalent modifications or changes made by the spirit of interest should be Figure 1 is a schematic diagram of the prior art contact surface profiler and lens. Figure 2 is a schematic diagram of the prior art height gauge and lens. Figure 3 is a lens of the first embodiment of the present invention. Figure 4 is a schematic plan view of the lens thickness gauge shown in Figure 1. Figure 5 is a schematic view of the lens thickness gauge and the lenticular lens shown in Figure 1. Figure 6 is in the direction of VI-VI of Figure 5. Fig. 7 is a schematic view showing the cooperation between the lens thickness gauge and the double concave lens according to the second embodiment of the present invention. [Main component symbol description] Lens thickness gauge 10 Slipper 121 Bracket 12 Mounting portion 122 Transmission device 13 end portion 152, 154 contact head 15, 45 second end surface 162 lens carrier 16, 46 bearing groove 164 control device 17 second matching surface 166 lens 18, 48 display portion 171 by screw 19 zero button 172 drive mechanism 20 slow rise button 173 Gear 21 Slow down button 174 Rack 22 Fast rise button 175 Motor 23 Fast down button 176 Follower mechanism 30 Surface 182 , 184 Bearing surface 111 A first surface of the contact groove 1546 1542 1544 anastomosis end face bearing table 13 1211200914794