200918982 九、發明說明： 【發明所屬之技術領域】 本發明關於一種鏡片，特別關於一種具有變色功能的 鏡片。 【先前技術】 隨著科技之進步，鏡片為現今曰常生活中不可或缺之 用品。依據功能性的不同可區分為光學鏡片及護目鏡片， 其可應用於光學眼鏡、太陽眼鏡、防護眼鏡、隱形眼鏡、 安全帽的護目片或遮陽帽的遮陽片，甚至望遠鏡、顯微 鏡或照相機等光學儀器都是常見的使用態樣。 請參照圖1所示，一種習知鏡片10包含一本體11以 及一底色層12。底色層12具有一底色材料121，其可降 低鏡片10對光線的穿透度，以改善陽光對眼睛所造成的 不適。然而，由於鏡片10對光線的穿透度無法隨著環境 變化自動改變，在夜間、室内或昏暗光線下，底色層12 反而無法提供足夠的穿透度，容易對於行動或行車造成危 險。 因此，如何提供一種具有隨著環境光線強弱變化而自 動改變穿透度的鏡片，能夠於強光下降低光線的強度以維 持視覺舒適，更能夠於昏暗光線下提供高穿透性，已成為 重要課題之一。 【發明内容】 5 200918982 有鑑於上述課題，本發明之目的為提供一種具有隨著 環境光線強弱變化而自動調整穿透度的變色鏡片，能夠於 強光下降低光線的強度以維持視覺舒適，更能夠於昏暗光 線下提供高穿透性。 緣是，為達上述目的，依據本發明之一種變色鏡片包 含一本體以及一先致變色層。本體具有一第一侧及一第二 侧。光致變色層設置於本體的第一側及/或第二側，光致變 色層包含至少一光致變色材料。 承上所述，依據本發明之一種變色鏡片藉由光致變色 材料的應用，於強光下降低光線的穿透度以維持視覺舒 適，於昏暗光線下則不致降低光線的穿透度，而提供高穿 透性。與習知技術相較，本發明能夠隨著環境光線強弱變 化而自動改變鏡片的穿透度，維持視覺舒適。製作上，本 發明能夠應用於既有的生產設備，增加設備的應用範圍。 此外，變色鏡片能夠依據實際需要增設功能層而為多 功能性的光學鏡片或護目鏡片，其功能例如但不限於抗反 射、防水、防霧、抗刮、抗紫外線等附加功能。 【實施方式】 以下將參照相關圖式，說明依據本發明較佳實施例之 一種變色鏡片，其中相同的元件將以相同的符號加以說 明。下述實施例之變色鏡片以應用於安全帽的護目鏡片為 例說明，然非用以限制本發明，本發明亦可應用於光學鏡 片。 6 200918982 第一實施例 請參照圖2所示，本發明第一實施例之一種變色鏡片 20包含一本體21以及一光致變色層22。本體21具有一 第一侧211及一第二侧212。光致變色層22可設置於本體 21的第一側211及/或第二侧212，光致變色層22包含至 少一光致變色材料221。本實施例以光致變色層22設置於 本體21的第一侧211及第二侧212為例說明。 光致變色層22具有重量百分比介於0.05%至5%的光 致變色材料221，其中較佳的比例介於0.2%至1%之間。 光致變色層22經由例如但不限於浸泡、沉積、喷灑、塗 佈或黏貼方式形成於本體21的第一侧211及第二侧212， 且光致變色層22的厚度介於1微米（μπι)至1〇〇微米之 間。其中，本體21的材質可為玻璃或高分子，高分子可 包含聚碳酸酯（PC)、聚苯乙烯（PS)、聚氨乙烯（PVc)、 丙烯腈•丁二烯•苯乙烯共聚物（ABS)、聚甲基丙烯酸甲酯 (PMMA)、變性聚氧化二甲苯（MPPO)、聚;ε風（PSF)、 聚醚砜（PES)、聚醚醯亞胺（PEI)、聚醯胺醯亞胺（pAI)、 聚氨基甲酸脂（pu)、聚對苯二曱酸乙二醇酯（pET)及 • 其組合。 - 於本實施例中’為避免光致變色材料221混入光致變 色層22，會與黏結劑（binder)發生作用，光致變色材料 221可藉由物理或化學方法預先包覆形成膠囊再混入黏結 劑。黏結劑可為例如熱固性樹脂，光致變色材料混入 後以攝氏110度至145度之間的溫度予以固化，即形成光 200918982 致變色層22。 參照圖3所示’光致變色材料221可選自chromenes 糸列、Spiropyrans 系列、Spirooxazines 系列、Salicylidene anilines系列、Fulgides系列或Azobenzenes系列等材料及 其組合所構成的群組。當光致變色材料受能量例如但不限 於紫外線（UV )的照射改變結構而為同分異構物 (Isomers)，此時異構型光致變色材料對於可見光具有不 同的吸收波長故視覺上有變色反應，紫外線越強則可反應 越多的異構型光致變色材料。此為可逆反應，當紫外線減 弱時部分異構型光致變色材料會恢復成原來的光致變色 材料的結構。 光致變色層22可依據環境紫外線的強弱而有不同變 色程度’而提供舒適的視覺感受。當紫外線消失或減弱 時，不會有異構型光致變色材料，則光致變色層22不致 降低光線的穿透度（例如大於50%)，故本體21可維持高 透光性。變色鏡片20能夠隨著環境光線強弱而改變鏡片 的穿透度達到舒適視覺感受，確實符合實際所需。 第二實施例 請參照圖4所示’本發明第二實施例之另一種變色鏡 片20a包含一本體21a以及一光致變色層22。由於光致變 色層22已於第一實施例詳述，於此不再贅述。 本體21a與上述本體21不同之處在於：本體21a具有 重量百分比介於0.1%至5%之間的底色材料213。在光致 變色層22不改變穿透度的情況下，本體21a除保有高透光 200918982 性之外，並可提供一底色作用。當光致變色層22發生顏 色變化時與本體21a的底色在視覺上產生重疊效果，而呈 現不同色彩於變色鏡片20a。當然，光致變色層22可利用 顏色混合調配與藉由雙層至多層混搭設計，而得到不同色 彩及濃度使變色鏡片20a具有更多元化的變化熊樣。 . 另外，若因本體21a為厚薄不均的鏡片而有不同色卢 表現，底色材料213亦可混入光致變色層22使變色鏡= 20a未變色前具有均勻的底色，並同時具有變色功能，以 符合實際所需。 於本實施例中，底色以黃色為例說明，當然亦可依實 際需要，將底色以其他顏色取代。本發明之光致變色層U 亦可形成於非平整表面，且同樣提供均勻變色效果。當 然，光致變色層22亦可局部設置於本體21a例如但不限= 以一圖案化或漸層方式設置於本體21a，當光致變色層U 發生顏色變化時，僅局部提供穿透度的改變（圖未顯示）， 故部分本體21a仍保有底色同時存在另一色彩變化，使變 色鏡片20a出現圖樣及色彩的配置，更具有多樣化的組合 型態。 σ - 第三f施例 - 請參照圖5所示，本發明第三實施例之再一種變色鏡 片20b包含一本體21、一光致變色層22以及一功能層 23b。由於本體21及光致變色層22已於第一實施例詳述， 於此不再贅述。 功能層23b可藉由例如但不限於浸泡、沉積、噴灑、 200918982 塗佈或黏貼方式設置於本體21的第一側211及/或第二侧 212。於此，功能層23b與光致變色層22以設置於本體21 的不同侧為例說明，光致變色層22位於本體21的第一側 211 ’功能層23b位於本體21的第二侧212，然非用以限 制本發明。功能層23b的功能可選自抗反射 (anti-reflection )、防水（water-proofing )、防霧（anti_fog )、 抗刮（anti-scratch)、抗紫外線（anti-uv)等功能及其組 合所構成的群組。 為提供眼睛及鏡片本身具有防護功能，故功能層23b 可例如具有抗紫外線功能，抗紫外線材質可以是由有機材 料例如含苯環之聚脂類’或無機材料例如Ti〇2_Fe2〇3所構 成。當使用者的眼睛（圖未顯示）置於本體21的第二侧212 時，環境中的紫外線可改變光致變色層22中的光致變色材 料221之結構而產生變色功能。另因功能層23b設置於本體 21的第二側212，故紫外線不會穿射出設置於第二侧212的 功阳層23b，而使變色鏡片2〇b兼具防護眼睛的功能。當 然，視貝際需要亦可增設例如抗反射功能於變色鏡片 2〇b，抗反射材料可為二氧化鈦（Ti〇2)、二氧化矽（si〇j 或二氧化鍅（Zr〇2)所構成之單層或多層結構 (multilayer)，提升舒適視覺感受且能避免影響視線。 第四實施例 〇,、、、圖6所示，本發明第四實施例之又一種變色鏡 片20c包含一本體21、一光致變色層22以及一功能層 23c。由於本體21及光致變色層22已於上述實施例詳述， 200918982 於此不再贅述。本實施例之功能層23c與光致變色層22 以設置於本體21的相同侧為例說明，然非用以限制本發 明。 功能層23c以防水功能為例說明，功能層23c鄰設於 光致變色層22,防水材料可選自氟系矽氧烷樹脂或其他疏 水性材料，使變色鏡片20c避免水分滯留而影響視線。當 然，為防止因體熱或流汗而產生的水氣附著於變色鏡片 20c，功能層23c可經過含氟元素或親水性材料（圖未顯示） 的處理，而具有防霧功能以確保視線清晰。 第五實施例 請參照圖7所示，本發明第五實施例之又一種變色鏡 片20d包含一本體21、一光致變色層22以及一功能層 23d。由於本體21及光致變色層22已於上述實施例詳述， 於此不再贅述。本實施例之功能層23d設置於本體21的 第一側211與光致變色層22之間為例說明，功能層23d 亦可具有黏著的性質，使光致變色層22黏貼於本體21。 綜上所述，依據本發明之一種變色鏡片藉由光致變色 層的應用中，於強光下降低光線的穿透度以維持視覺舒 適，於昏暗光線下則不致降低光線的穿透度，而提供高穿 透性。與習知技術相較，本發明能夠隨著環境光線強弱變 化而自動改變鏡片的穿透度，維持視覺舒適。製作上，本 發明能夠應用於既有的生產設備，增加設備的應用範圍。 此外，變色鏡片能夠依據實際需要增設功能層而為多 功能性的光學鏡片或護目鏡片，其功能例如但不限於抗反 11 200918982 射、防水、防霧、抗刮、抗紫外線等附加功能。 以上所述僅為舉例性，而非為限制性者。任何未脫離 本發明之精神與範疇，而對其進行之等效修改或變更，均 應包含於後附之申請專利範圍中。 【圖式簡單說明】 圖1為一種習知鏡片的示意圖； 圖2為本發明第一實施例之一種變色鏡片的示意圖； 圖3為光致變色材料結構改變成同分異構物的可逆反 應式， 圖4為本發明第二實施例之另一種變色鏡片的示意 圖； 圖5為本發明第三實施例之再一種變色鏡片的示意 圖， 圖6為本發明第四實施例之又一種變色鏡片的示意 圖；以及 圖7為本發明第五實施例之又一種變色鏡片的示意 圖。 【主要元件符號說明】 10 :鏡片 11、21、21a :本體 12 :底色層 121、213 :底色材料 12 200918982 20 ' 211 212 22 : 221 23b 變色鏡片 20a、20b、20c、20d ： :第一侧 :第二側 光致變色層 :光致變色材料 、23c、23d :功能層 13200918982 IX. Description of the Invention: [Technical Field] The present invention relates to a lens, and more particularly to a lens having a color changing function. [Prior Art] With the advancement of technology, lenses are an indispensable item in today's everyday life. Depending on the functionality, it can be divided into optical lenses and eye protection lenses, which can be applied to optical glasses, sunglasses, safety glasses, contact lenses, sun visors for sun visors or sun visors, even telescopes, microscopes or cameras. Optical instruments are common usage patterns. Referring to FIG. 1, a conventional lens 10 includes a body 11 and a ground layer 12. The base layer 12 has a base material 121 which reduces the penetration of the lens 10 with light to improve the eye's discomfort to the eyes. However, since the penetration of the lens 10 with light does not automatically change with environmental changes, the underlying layer 12 does not provide sufficient penetration at night, indoors, or dim light, which is dangerous for action or driving. Therefore, how to provide a lens that automatically changes the transmittance as the ambient light intensity changes, can reduce the intensity of light under strong light to maintain visual comfort, and can provide high penetration under dim light, which has become important. One of the topics. SUMMARY OF THE INVENTION 5 200918982 In view of the above problems, an object of the present invention is to provide a color-changing lens that automatically adjusts the transmittance according to changes in ambient light intensity, and can reduce the intensity of light under strong light to maintain visual comfort. Provides high penetration in dim light. In order to achieve the above object, a color changing lens according to the present invention comprises a body and a pre-chromic layer. The body has a first side and a second side. The photochromic layer is disposed on the first side and/or the second side of the body, and the photochromic layer comprises at least one photochromic material. According to the above, a color-changing lens according to the present invention reduces the light transmittance under strong light to maintain visual comfort by using a photochromic material, and does not reduce the light transmittance in dim light. Provide high penetration. Compared with the prior art, the present invention can automatically change the transparency of the lens as the ambient light intensity changes, maintaining visual comfort. In terms of production, the present invention can be applied to existing production equipment and increase the application range of the equipment. In addition, the color-changing lens can be a multi-functional optical lens or a goggle lens according to actual needs, and its functions are, for example but not limited to, anti-reflection, waterproof, anti-fog, anti-scratch, anti-ultraviolet and the like. [Embodiment] Hereinafter, a color-changing lens according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings, wherein the same elements will be denoted by the same reference numerals. The color-changing lens of the following embodiment is exemplified by a goggle lens applied to a helmet, but is not intended to limit the present invention, and the present invention can also be applied to an optical lens. 6 200918982 First Embodiment Referring to Figure 2, a color changing lens 20 according to a first embodiment of the present invention comprises a body 21 and a photochromic layer 22. The body 21 has a first side 211 and a second side 212. The photochromic layer 22 can be disposed on the first side 211 and/or the second side 212 of the body 21, and the photochromic layer 22 includes at least one photochromic material 221. In this embodiment, the photochromic layer 22 is disposed on the first side 211 and the second side 212 of the body 21 as an example. The photochromic layer 22 has a photochromic material 221 in a weight percentage of from 0.05% to 5%, with a preferred ratio being between 0.2% and 1%. The photochromic layer 22 is formed on the first side 211 and the second side 212 of the body 21 via, for example, but not limited to, soaking, depositing, spraying, coating or pasting, and the photochromic layer 22 has a thickness of 1 micron ( Between μπι) and 1 μm. The material of the body 21 may be glass or polymer, and the polymer may comprise polycarbonate (PC), polystyrene (PS), polyvinyl chloride (PVc), acrylonitrile butadiene styrene copolymer ( ABS), polymethyl methacrylate (PMMA), denatured polyoxyxylene (MPPO), poly; ε wind (PSF), polyether sulfone (PES), polyether quinone imine (PEI), polyamidoxime Imine (pAI), polyurethane (pu), polyethylene terephthalate (pET) and/or combinations thereof. - In the present embodiment, in order to prevent the photochromic material 221 from being mixed into the photochromic layer 22, it acts with a binder, and the photochromic material 221 can be pre-coated by physical or chemical means to form a capsule and then mixed. Adhesive. The binder may be, for example, a thermosetting resin which is cured at a temperature between 110 ° C and 145 ° C when mixed, i.e., forms a light-transmissive layer 22 of 200918982. Referring to Fig. 3, the photochromic material 221 may be selected from the group consisting of chromenes, the Spiropyrans series, the Spirooxazines series, the Salicylidene anilines series, the Fulgides series, or the Azobenzenes series, and combinations thereof. When the photochromic material is changed to structure by energy, such as but not limited to ultraviolet (UV) irradiation, it is an isomer (Isomers). At this time, the isomerized photochromic material has different absorption wavelengths for visible light, so visually there are The color change reaction, the stronger the ultraviolet light, the more the isomeric photochromic material can react. This is a reversible reaction, and when the ultraviolet light is weakened, the partially isomeric photochromic material returns to the structure of the original photochromic material. The photochromic layer 22 can provide a comfortable visual experience by varying the degree of coloration depending on the intensity of the ambient ultraviolet light. When the ultraviolet light disappears or weakens, there is no isomeric photochromic material, and the photochromic layer 22 does not reduce the light transmittance (e.g., greater than 50%), so that the body 21 can maintain high light transmittance. The color-changing lens 20 can change the penetration of the lens to a comfortable visual experience as the ambient light intensity is strong, which is indeed in line with actual needs. SECOND EMBODIMENT Referring to Fig. 4, another color-changing lens sheet 20a of the second embodiment of the present invention comprises a body 21a and a photochromic layer 22. Since the photochromic layer 22 has been described in detail in the first embodiment, it will not be described again. The body 21a is different from the above-described body 21 in that the body 21a has a base material 213 in a weight percentage of between 0.1% and 5%. In the case where the photochromic layer 22 does not change the transmittance, the body 21a can provide a background color in addition to the high light transmission 200918982. When the color change of the photochromic layer 22 occurs, the background color of the body 21a is visually overlapped, and the color is different in the color changing lens 20a. Of course, the photochromic layer 22 can be designed by color mixing and by double-layer to multi-layer mixing to obtain different colors and concentrations, so that the color-changing lens 20a has a more diversified variation bear. In addition, if the body 21a has a different thickness and the color is different, the ground material 213 may be mixed into the photochromic layer 22 to make the color changing mirror 20a have a uniform background color before discoloration, and at the same time have discoloration. Features to meet actual needs. In the present embodiment, the background color is illustrated by yellow, and of course, the background color may be replaced by other colors as needed. The photochromic layer U of the present invention can also be formed on a non-flat surface and also provides a uniform color change effect. Of course, the photochromic layer 22 may be partially disposed on the body 21a, for example, but not limited to, in a patterned or gradual manner on the body 21a. When the photochromic layer U changes color, only partially provides transparency. The change (not shown), the partial body 21a still retains the ground color and another color change, so that the color lens 20a has a pattern and a color arrangement, and has a more diverse combination. σ - Third f embodiment - Referring to Figure 5, a further color-changing lens 20b according to a third embodiment of the present invention comprises a body 21, a photochromic layer 22 and a functional layer 23b. Since the body 21 and the photochromic layer 22 have been described in detail in the first embodiment, they are not described herein again. The functional layer 23b can be disposed on the first side 211 and/or the second side 212 of the body 21 by, for example, but not limited to, soaking, depositing, spraying, 200918982 coating or pasting. Here, the functional layer 23b and the photochromic layer 22 are illustrated on different sides of the body 21. The photochromic layer 22 is located on the first side 211 of the body 21. The functional layer 23b is located on the second side 212 of the body 21. It is not intended to limit the invention. The function of the functional layer 23b may be selected from the group consisting of anti-reflection, water-proofing, anti-fog, anti-scratch, anti-uv, and the like. The group that is formed. In order to provide the eye and the lens itself with a protective function, the functional layer 23b may have, for example, an ultraviolet-resistant function, and the ultraviolet-resistant material may be composed of an organic material such as a benzene ring-containing polyester or an inorganic material such as Ti〇2_Fe2〇3. When the user's eyes (not shown) are placed on the second side 212 of the body 21, the ultraviolet light in the environment can change the structure of the photochromic material 221 in the photochromic layer 22 to produce a color changing function. Further, since the functional layer 23b is disposed on the second side 212 of the body 21, the ultraviolet rays do not penetrate the functional positive layer 23b provided on the second side 212, and the color changing lens 2b has a function of protecting the eyes. Of course, depending on the needs of the shell, an anti-reflection function such as titanium dioxide (Ti〇2) or cerium oxide (si〇j or cerium oxide (Zr〇2) may be added. The single layer or the multi-layer structure enhances the comfortable visual perception and can avoid affecting the line of sight. In the fourth embodiment, another color lens 20c according to the fourth embodiment of the present invention includes a body 21 as shown in FIG. A photochromic layer 22 and a functional layer 23c. Since the body 21 and the photochromic layer 22 have been described in detail in the above embodiments, the details of the functional layer 23c and the photochromic layer 22 of this embodiment will not be described herein. The description is made by taking the same side of the main body 21 as an example, but it is not intended to limit the present invention. The functional layer 23c is exemplified by a waterproof function, and the functional layer 23c is adjacent to the photochromic layer 22, and the waterproof material may be selected from the group consisting of fluorine-based enamel. The oxygen-alkali resin or other hydrophobic material causes the color-changing lens 20c to avoid moisture retention and affect the line of sight. Of course, in order to prevent moisture generated by body heat or sweat from adhering to the color-changing lens 20c, the functional layer 23c may pass fluorine-containing elements or Hydrophilic material The figure is not shown), and has an anti-fog function to ensure a clear line of sight. Fifth Embodiment Referring to FIG. 7, another color changing lens 20d according to a fifth embodiment of the present invention comprises a body 21 and a photochromic layer. The functional layer 23d of the present embodiment is disposed on the first side 211 of the body 21 and the photochromic layer. For example, the layer 22 may have an adhesive property to adhere the photochromic layer 22 to the body 21. In summary, a color-changing lens according to the present invention is applied by a photochromic layer. The light penetration is reduced under strong light to maintain visual comfort, and the light penetration is not reduced under dim light, thereby providing high penetration. Compared with the prior art, the present invention can follow ambient light. The strength and weakness change automatically change the penetration of the lens to maintain visual comfort. In the production, the invention can be applied to existing production equipment and increase the application range of the device. In addition, the color-changing lens can be added according to actual needs. An optical lens or a goggle lens that is versatile and capable of functions such as, but not limited to, an additional function such as anti-reflection, waterproof, anti-fog, anti-scratch, anti-ultraviolet, etc. The above description is merely exemplary, and Any equivalent modifications or alterations to the spirit and scope of the present invention are intended to be included in the scope of the appended claims. FIG. 1 is a 2 is a schematic view of a color changing lens according to a first embodiment of the present invention; FIG. 3 is a reversible reaction formula of a photochromic material structure changed to an isomer; FIG. 4 is a second embodiment of the present invention. FIG. 5 is a schematic view showing still another color changing lens according to a third embodiment of the present invention, FIG. 6 is a schematic view showing still another color changing lens according to a fourth embodiment of the present invention; and FIG. 7 is the fifth embodiment of the present invention. A schematic view of yet another color changing lens of the embodiment. [Description of main component symbols] 10: Lens 11, 21, 21a: Main body 12: Under color layer 121, 213: Undertone material 12 200918982 20 ' 211 212 22 : 221 23b Color-changing lenses 20a, 20b, 20c, 20d: : One side: second side photochromic layer: photochromic material, 23c, 23d: functional layer 13