201106037 六、發明說明： 【發明所屬之技術領域】 ^本發明提供一種可有效降低光學系統中有效孔徑外雜散 光之光學設計，主要是降低光學系統中雜散光的數量，提升光 學成像品質。有觀傳統人卫塗黑絲面加讀化粗操處理， 本發明可於歸開模射城形時，於有效孔㈣同時製造出可 消除雜散光之鋸齒狀結構，將雜散光線反射回物方或侷限於材 料中，減少有效孔徑外之光線反射至像方，能有效抑制光學系 統中之雜散光漫射或反射至成像面，避免不必要的光線在成像 處造成鬼影等雜訊，並也同時省去製造後再次人力加工的成 本0 【先前技術】 隨著光學設計與半導體感光元件的進步，影像儲存的方式 也從傳統的感光膠捲軟片轉換為電子訊號以數位方式儲存於 特定規格的儲存媒介中’而相機鏡頭成像品質也隨著鍍膜技術 的進步，使儲存影像越來越清晰。但光學鏡頭的製造，從古至 今’鏡片與鏡片間或是有效孔徑外機構件之間有些許光線於其 中產生反射，造成了成像時影像成像品質的雜訊。也因此，相 關消除雜散光之技術逐漸開始得到重視。 常見傳統降低雜散光之設計，是於鏡片外侧與鏡桶内部進 行塗黑，使的大角度打至有效孔徑外的光線能有效被吸收，減 201106037 >光線反射到成像面的機會；另外一種降低雜散光之設計，是 中華民國經濟部智慧財產局於2〇〇5年7月〗曰授權公告之專 利號碼為I2351G3之專财f請公町—觀时效孔徑外雜 散光之方法，如圖一所示，其特徵在於成型機構的護環模仁表 面，經霧化處理形成相對粗操面，降低光線入射時的反射，此 習知降低雜散光之技術，主要將有效孔徑外部份之鏡片邊緣 12以人力方式加工霧化使其形成粗操的表面，降低光線的反 射。 但上述之習知降低雜散光之技術效果有限，在製造流程上 需耗費大量人力進行加工’且加工品質不易掌握^相較於本發 明之有效餘外降錄散光之設計，*僅錄神純，也不 需耗費人力額外加工’所以本發明之應用將會是指日可待的。 有鑑於此，提供一種可有效降低光學系統中雜散光之光學 設計取代傳統消除雜散光之方法是有必要的。 【發明内容】 本發明提供一種可有效降低光學系統中有效孔徑外雜散 光之光學設計’此設計是糊三㈣織狀結構，使入射光線 射入鋸齒結構後在結構内部產生内部全反射而不會出射至有 效孔徑内，藉此降低光學系統内之雜散光。 為了實現本發明之目的’本發明提供一種可有效降低光學 系統中有效孔徑外雜散光之光學設計，此設計乃針對塑膠鏡片 201106037 進行設計，將鏡片有效孔徑外設計成三角形鋸齒狀結構，使入 射光線射入鋸齒結構後在結構内部產生内部全反射而不會出 射至有效孔徑内。因塑膠製程可以製造出任意形狀，所以本發 明之設計，可在鏡片射出時一併將有效口徑外之鑛齒狀結構一 起射出，相較於傳統降低雜散光之技術，本發明除了可以降低 雜散光，並可以在製造流程上大幅減少製造人力，降低成本。 相較習知技術之降低雜散光方法，本發明之方法可於塑膠 • 開模射出成形時’於有效孔徑外同時製造出可消除雜散光之鑛 齒狀結構，能有效抑制光學系統中之雜散光漫射或反射至成像 面，避免不必要的光線在成像處造成鬼影等雜訊，並也同時省 去製造後再次人力加工的成本，提供一種能有效降低雜散光並 節省生產人力的方法。 【實施方式】 本發明之δ又计s青參閱第一圖，將光學系統中，鏡片之有效 • 孔徑外設計成鋸齒狀結構，並運用了光線臨界角反射與内部全 反射原理設計’將大肖度之雜散光線反伽物方或使光線侷限 在鋸齒結構中，如圖三及圖四所示，以達到減少雜散光線反射 至像方的齡。其巾’本發明之單—織幾何形狀為直角三角 形’且其垂直面迎向雜散光入射方。 基本降低雜散光之光學設相第二圖、第三圖，以及第四 圖為例’設計包括鏡月第一面2卜鏡片第二面22、有效孔徑 外鑛齒狀結構23、纽雜外下翁錄結構％，以及有效 孔徑外上斜鋸齒狀結構25。大角度光線經由鏡片第一面21及 201106037 第二面22岭，軸__會叙 構=其局部放大鑛齒結構23如圖三所示，其中包括大= 雜散光3卜入射角度34，以及鑛齒頂角33。 如圖一所不’從鏡片第二面22射出的大角度雜散光^， 以入射角度34射入鑛齒結構，而鑛齒狀結構23為了減少大角 度雜光31往成像面傳遞，必須使大角度雜散光^於射入有 效胁外鋪狀結_，光雜獨_献往物面方 • 肖反射。所以在設計鑛齒形狀時，若鑛齒幾何形狀表面為透明 入射面時’單—軸幾何形狀為直角三角形，且其垂直面迎向 雜散光^射方，·絲齒幾何雜表面為朗柏(Lambertianm 射’則早-鑛齒幾何形狀為直角三角形，且其斜面迎向雜散光 入射方’目的域少光雜絲面反射賴會。*本發明之据 齒頂角33設計’將依循大角度雜散光之入射角％來設計。當 入射角34大於或等於9〇度減鋸齒頂角33時，即 , 角度3检(9〇°-頂角33)。大角度雜散光31之角度34在大於90度減 鑛齒頂肖33 a夺’反射回物方之雜散光數量增加，藉此減少雜f 散光傳遞至成像面的機會。 綜上所述，本發明符合發明專利之要件，故依法提出專利 申》月以上所述者僅為本發明之較佳實施例，本發明所包括之 範圍並不以上述實施例為限，舉凡熟習本案技藝之人士援依本 發明專利之精神所作之等效修改或類似變化，皆應涵蓋於以下 申請專利範圍内。 201106037 【圖式簡單說明】 第一圖係習知技術之傳統減少雜散光示意圖。 第二圖係本發明之降低雜散光鋸齒結構示意圖。 第三圖係本發明之降低雜散光下斜鋸齒結構示意圖。 -第四圖係本發明之降低雜散光上斜鋸齒結構示意圖。 第五圖係第二圖鋸齒狀結構部份局部放大示意圖。 第六圖係光線被侷限於雜齒狀結構之示意圖。201106037 VI. Description of the Invention: [Technical Field] The present invention provides an optical design that can effectively reduce stray light outside an effective aperture in an optical system, mainly to reduce the amount of stray light in an optical system and improve optical imaging quality. The utility model has the advantages of the traditional black-faced black-faced surface and the reading rough processing. The invention can simultaneously produce a saw-tooth structure capable of eliminating stray light and reflect the stray light back when the mold hole is turned off. The object side is limited to the material, and the light outside the effective aperture is reduced to the image side, which can effectively suppress the stray light in the optical system from being diffused or reflected to the imaging surface, and avoid unnecessary light to cause ghosts and the like in the image forming place. At the same time, the cost of manual manufacturing after manufacturing is also eliminated. 0 [Prior Art] With the advancement of optical design and semiconductor photosensitive elements, the image storage method has also been converted from a conventional photosensitive film to an electronic signal and stored digitally in a specific manner. In the specification of the storage medium, the image quality of the camera lens is also improved with the coating technology, making the stored image more and more clear. However, the manufacture of optical lenses, from ancient times to today, between the lens and the lens or between the effective aperture and the outer member, some light is reflected in it, resulting in noise of image quality during imaging. As a result, technologies related to the elimination of stray light have gradually begun to receive attention. Commonly used to reduce the design of stray light, it is black on the outside of the lens and inside the mirror barrel, so that the light from the large angle to the effective aperture can be effectively absorbed, minus the opportunity of 201106037 > light reflection to the imaging surface; The design of reducing stray light is the method of the Ministry of Economic Affairs of the Ministry of Economic Affairs of the Republic of China in July, 2005. The patent number of the authorized announcement is I2351G3, and the method of seeing the aging effect of the stray light is as shown in the figure. As shown in the figure, the surface of the retaining ring mold of the forming mechanism is atomized to form a relatively coarse running surface to reduce the reflection of light when incident. This conventional technique for reducing stray light mainly uses an external effective aperture. The lens edge 12 is atomized by hand to form a rough surface that reduces the reflection of light. However, the above-mentioned conventional techniques for reducing stray light have limited technical effects, and it takes a lot of manpower to process in the manufacturing process, and the processing quality is difficult to grasp. Compared with the design of the effective residual astigmatism of the present invention, *only recorded purely pure It does not require labor extra processing' so the application of the present invention will be just around the corner. In view of this, it is necessary to provide an optical design that can effectively reduce stray light in an optical system instead of the conventional method of eliminating stray light. SUMMARY OF THE INVENTION The present invention provides an optical design that can effectively reduce stray light outside an effective aperture in an optical system. This design is a paste three (four) woven structure that causes incident light to enter the sawtooth structure and generate internal total reflection inside the structure without It will exit into the effective aperture, thereby reducing stray light in the optical system. In order to achieve the object of the present invention, the present invention provides an optical design which can effectively reduce the stray light outside the effective aperture in the optical system. The design is designed for the plastic lens 201106037, and the outer aperture of the lens is designed as a triangular sawtooth structure to make the incident When light enters the sawtooth structure, it creates internal total reflection inside the structure and does not exit into the effective aperture. Since the plastic process can be manufactured in any shape, the design of the present invention can simultaneously emit the ore-like structure outside the effective aperture when the lens is emitted, and the present invention can reduce the impurity as compared with the conventional technique for reducing stray light. Astigmatism can significantly reduce manufacturing manpower and reduce costs in the manufacturing process. Compared with the conventional method for reducing stray light, the method of the invention can simultaneously produce a mineral tooth structure capable of eliminating stray light at the same time as plastic injection molding, and can effectively suppress impurities in the optical system. The astigmatism diffuses or reflects to the imaging surface, avoiding unnecessary light to cause ghosts and other noises at the image, and at the same time eliminating the cost of manual processing after manufacture, providing a method for effectively reducing stray light and saving production manpower. . [Embodiment] The δ of the present invention is also referred to the first figure, and the effective and the outer diameter of the lens in the optical system is designed as a zigzag structure, and the principle of light critical angle reflection and internal total reflection is used to design The stray light anti-gamma side of Xiaodu or the light is confined in the sawtooth structure, as shown in Figure 3 and Figure 4, to reduce the reflection of stray light to the image side. The towel 'the single-woven geometry of the present invention is a right-angled triangle' and its vertical surface faces the incident side of stray light. The second, third, and fourth figures of the optical phase of the basic reduction of stray light are as follows: 'Design includes the first side of the lens, the second side of the lens 22, the effective aperture outer mineral tooth structure 23, The lower Weng structure %, and the effective aperture outside the upper zigzag structure 25. The large angle light passes through the first surface 21 of the lens and the second surface 22 ridge of 201106037. The axis __ will be described as its partial enlarged ore structure 23 as shown in FIG. 3, including large = stray light 3 incident angle 34, and Mine tooth apex angle 33. As shown in Fig. 1, the large-angle stray light emitted from the second surface 22 of the lens is incident on the ore-tooth structure at an incident angle 34, and the ore-like structure 23 must be made to reduce the transmission of the large-angle stray light 31 to the image plane. Large-angle stray light ^ is injected into the effective threat of the outer paving knot _, light miscellaneous _ to the object side • Xiao reflection. Therefore, when designing the shape of the ore tooth, if the geometrical surface of the ore tooth is a transparent incident surface, the 'single-axis geometry is a right-angled triangle, and its vertical surface is facing the stray light beam. (Lambertianm shot 'the early-mineral geometry is a right-angled triangle, and its bevel faces the stray light incident side' target field less light miscellaneous surface reflection depends. * The design of the tooth tip angle 33 design 'will follow the big The angle of incidence of the stray light is designed to be. When the incident angle 34 is greater than or equal to 9 degrees minus the sawtooth apex angle 33, that is, the angle 3 is detected (9 〇 ° - apex angle 33). The angle of the large angle stray light 31 is 34 The number of stray light increases by more than 90 degrees, and the number of stray light increases, thereby reducing the chance of the astigmatism transmitted to the imaging surface. In summary, the present invention meets the requirements of the invention patent, The above-mentioned patents are only the preferred embodiments of the present invention, and the scope of the present invention is not limited to the above embodiments, and those skilled in the art will be able to rely on the spirit of the present invention. Equivalent modification or similar change, It should be covered by the following patent application. 201106037 [Simplified description of the drawings] The first figure is a schematic diagram of the conventional method for reducing stray light. The second figure is a schematic diagram of the structure of reducing stray light sawtooth of the present invention. Schematic diagram of reducing the sawtooth structure under stray light. -The fourth figure is a schematic diagram of the structure of the sawtooth structure for reducing the stray light of the present invention. The fifth figure is a partial enlarged view of the sawtooth structure of the second figure. A schematic view of a miscellaneous structure.
【主要元件符號說明】 一般鏡面 11 鏡片邊緣 12 鏡片第一面 21 鏡片第二面 22 有效孔徑外鋸齒狀結構 23 有效孔徑外下斜鋸齒狀結構 24 有效孔徑外上斜鋸齒狀結構 25[Main component symbol description] General mirror 11 Lens edge 12 Lens first side 21 Lens second side 22 Effective aperture outer serrated structure 23 Effective aperture outer oblique zigzag structure 24 Effective aperture outer oblique zigzag structure 25
大角度雜散光 31 鋸齒頂角 33 大角度雜散光入射角度 34Large angle stray light 31 Serrated apex angle 33 Large angle stray light incident angle 34