200925649 九、發明說明： _ 【發明所屬之技術領域】 本發明涉及-種分光鏡及其分光膜層，尤其涉及一種 可用於多種光碟機中之分光鏡及其分光膜層。 【先前技術】BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spectroscope and a spectroscopic film layer thereof, and more particularly to a spectroscope and a spectroscopic film layer which can be used in a plurality of optical disc players. [Prior Art]
目七市面上^供之光碟機，主要包括CD光碟機、dvD 光碟機及HD-DVD光碟機。CD光碟、DVD光碟及HD DVD 光碟之主要不同點在於其資料存儲密度之不同，CD光碟之 資料存儲密度最低，HD_DVD光碟之資料存儲密度最高。 而對於該三種光碟之讀寫，也分別採用785nm、66〇nm&The optical disc drive on the market is mainly composed of CD players, dvD disc players and HD-DVD disc players. The main difference between CD-ROMs, DVDs and HD-DVDs is the difference in data storage density. CD-ROMs have the lowest data storage density and HD_DVDs have the highest data storage density. For the reading and writing of the three types of optical discs, 785 nm, 66 〇 nm &
4〇5nm波長之光進行讀寫。因此，應用於HD-DVD、DVD 及CD系統中之45。入射分光鏡之分光膜層一般需要分別進 行設計。 另外，由於DVD内部光束傳輸時為非平行光，所以此 分光膜層還要能容忍入射光之入射角度變化（一般約正負4 度）。 ' 龜 【發明内容】 有鑒於此，有必要提供一種能夠容忍入射光之入射角 度變化且能夠用於多種光碟機中之分光鏡及其分光膜層。 一種分光鏡之分光膜層，其包括一個第一獏層、一個 弟二膜層及一個第三膜層。所述第一膜層、第二膜層及第 三膜層均由高、低折射率材料交替堆疊而成。所述第一膜 層、第二膜層及第三膜層之膜層結構分別為 (〇.58H1.16L0.58H)N1、（0.8L1.6H0.8L)N2 及（0.95L1.9H0.95L)N3 0 其中 H 代表 6 200925649 光學厚度為λ/4之高折⑽材·層，其折 之間；L代表光學厚度為λ/4之低折糾' 低祈射率材料膜層，其折射 率在1.3-1.7之間，Nl、N2及N3為整數。 當從入射角度變化時，所述分伞扭 T疋刀光鏡之分光膜層在 ❹ 405nm、660nm與785nm這3個波長之透射率變化不大， 能夠容忍入射光入射角度出現—定之變化。另外，所述分 光膜層對於入射角為41。、45。及49。之入射光，在·請、 660nm與785讀這3健長之透射率較其他可見光具有較 低之透射率，使得光碟機中該三種光均有較高利用率，從 而可用作為HD-DVD、DVD及CD系統中45。入射分光鏡 之分光膜層。 【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1，為本發明實施方式提供之一種分光鏡 100，所述分光鏡100包括一個基材20及形成在所述基材 20 —個表面上之一個为光膜層1〇。所述基材2〇之材料可 β為玻璃或塑膠等。 所述分光膜層10包括一個第一膜層u、—個第二膜 層12及一個第三膜層13。 所述第一膜層11、第二膜層12及第三膜層13均由高、 低折射率材料交替堆疊而成。所述第一膜層之臈層結構為 。所述第二犋層12之膜層結口構為 。所述第三膜層13之膜層結構為 (〇.95U.9H〇.95Lr。其中Η代表光學厚度為λ/4之高折射率材料 7 200925649 - 膜層’其折射率在2.0-4.0之間；L代表光學厚度為λ/4之 . 低折射率材料獏層，其折射率在1.3-1.7之間；Nl、Ν2及 Ν3為整數。所述λ之值為42〇nm_47〇mn，優選地，所述χ 之值為450nm。優選地，所述高折射率材料之折射率為 2.0-2.3 ’所述高折射率材料之折射率為1.44.5。所述高折 射率材料可選自二氧化鈦、五氧化二鈕及五氧化二鈮等中 之一種或幾種之混合。所述低折射率材料可選自二氟化 鎂、二氧化矽等材料中一種或幾種之混合。所述光學厚度 ❹等於相應膜層之實際厚度與對應膜層之折射率之積。 所述分光膜層10中之第一膜層11主要用於控制波長 為405nm光線之反射率和透射率。所述第二膜層12主要 用於控制波長為660nm光線之反射率和透射率。所述第二 膜層13主要用於控制波長為785ηιη光線之反射率和透射 率。所述第一膜層11、第二膜層12及第二膜層13基本係 分別來實現各自之功能，因此所述第一膜層11、第二膜層 12及第二膜層13之間之相互位置可以調換。因此，所述 ® 分光膜層10之膜層結構具體可為（a58H1.16L0.58H)N1 (0.8L1.6H0.8L)N2 (〇-95L1.9H0.95L)N3 、 (0.8L1.6H0.8L)N2 (0.58H1.16L0.58H)N1 (0.95Ll_9H0.95L)m 及（〇.8L1.6H0.8L)N2 (0.95L1_9H0.95L)N3 (0.58H1.16L0.58H)N1 0 請參閱圖2,為本發明一具體實施方式描述之分光膜 層10之透射率特性曲線圖。在該具體實施方式中，該分光 膜層 10 之膜層結構為（a58HL16L058H)3 (0见1.册0见)4 (0_95L1.9H0.95L)3，所述Η代表光學厚度為λ/4之高折射率材料 膜層；L代表光學厚度為λ/4之低折射率材料膜層。其中， 200925649 中，所述*折射率材料為五氧化二組，其折射 「編。辦、、’所述低折射率材料為二氧化碎，其折射率為 1.468。所述 λ 為 450n.ni。 。所。述圖2示出分光膜層1〇在入射光之入射角度為 41 45及49時之透射率與波長之曲線圖。由圖2中可見， 當從入射角度變化時405nm、66〇nm與785nm這3個波長 之透射率變化不大，因此所述分光膜層10能夠容忍入射光 入射角度之變化。另外，由圖2中還可看出，對於入射角 © 為 41°、45。及 49。之入射光，在 405nm、660nm 與 785nm 這3個波長之透射率較其他可見光具有較低之透射率，從 而使得光碟機中之該三種光均有較高之利用率。從而可用 作為HD-DVD、DVD及CD系統中之45。入射分光鏡之分 光膜層。 綜上所述，本發明符合發明專利要件，爰依法提出專 利申請。惟，以上所述者僅為本發明之較佳實施方式，本 發明之範圍並不以上述實施方式為限，舉凡熟悉本案技藝 ® 之人士援依本發明之精神所作之等效修飾或變化，皆應涵 蓋於以下申請專利範圍内。 【圖式簡單說明】 圖1係本發明實施方式提供之一種分光鏡示意圖。 圖2係本發明實施方式提供之一種分光鏡膜層之透射 率特性曲線圖。 【主要元件符號說明】 分光鏡 100 分光膜層 10 9 200925649 第- -膜層 11 第二膜層 12 第J L膜層 13 基材 204 〇 5 nm wavelength light is read and written. Therefore, it is applied to 45 in HD-DVD, DVD and CD systems. The splitting film layer of the incident beam splitter generally needs to be separately designed. In addition, since the internal light beam of the DVD is non-parallel light, the light splitting film layer can also tolerate the incident angle change of the incident light (generally about plus or minus 4 degrees). <The present invention] In view of the above, it is necessary to provide a spectroscope and a spectroscopic film layer which can withstand variations in incident angle of incident light and which can be used in a plurality of optical disc players. A beam splitting film layer comprising a first layer, a second layer and a third layer. The first film layer, the second film layer and the third film layer are each formed by alternately stacking high and low refractive index materials. The film layers of the first film layer, the second film layer and the third film layer are (〇.58H1.16L0.58H)N1, (0.8L1.6H0.8L)N2 and (0.95L1.9H0.95L, respectively) N3 0 where H stands for 6 200925649 High-fold (10) material layer with optical thickness λ/4, between folds; L stands for low-definition low-gravity material film with optical thickness λ/4, its refraction The ratio is between 1.3 and 1.7, and Nl, N2 and N3 are integers. When changing from the incident angle, the transmittance of the splitting film layer of the split-twist T-mirror lens at the three wavelengths of ❹405 nm, 660 nm, and 785 nm does not change much, and the incident angle of the incident light can be tolerated. Further, the spectral film layer has an incident angle of 41. 45. And 49. The incident light, at 660nm and 785, has a lower transmittance than other visible light, which makes the three kinds of light in the optical disc have higher utilization, and thus can be used as HD-DVD. 45 in DVD and CD systems. The splitting film layer of the incident beam splitter. [Embodiment] Hereinafter, the present invention will be further described in detail with reference to the accompanying drawings. Referring to FIG. 1 , a spectroscope 100 according to an embodiment of the present invention includes a substrate 20 and a photo film layer 1 formed on one surface of the substrate 20 . The material of the substrate 2 can be glass or plastic. The light splitting film layer 10 includes a first film layer u, a second film layer 12, and a third film layer 13. The first film layer 11, the second film layer 12 and the third film layer 13 are each formed by alternately stacking high and low refractive index materials. The layer structure of the first film layer is . The film junction of the second layer 12 is configured as . The film structure of the third film layer 13 is (〇.95U.9H〇.95Lr. wherein Η represents a high refractive index material with an optical thickness of λ/4 7 200925649 - the film layer has a refractive index of 2.0-4.0 L represents an optical thickness of λ/4. The low refractive index material has a refractive index between 1.3 and 1.7; N1, Ν2 and Ν3 are integers. The value of λ is 42〇nm_47〇mn, preferably The value of the χ is 450 nm. Preferably, the refractive index of the high refractive index material is 2.0-2.3 'the refractive index of the high refractive index material is 1.44.5. The high refractive index material may be selected from Mixing one or more of titanium dioxide, pentoxide oxide, and antimony pentoxide, etc. The low refractive index material may be selected from one or a mixture of materials such as magnesium difluoride, cerium oxide, and the like. The optical thickness ❹ is equal to the product of the actual thickness of the corresponding film layer and the refractive index of the corresponding film layer. The first film layer 11 of the light-splitting film layer 10 is mainly used for controlling the reflectance and transmittance of light having a wavelength of 405 nm. The second film layer 12 is mainly used for controlling the reflectance and transmittance of light having a wavelength of 660 nm. The first film layer 11, the second film layer 12, and the second film layer 13 are basically used to realize respective functions, and thus the first film layer 11 is used to control the reflectance and transmittance of the light having a wavelength of 785 η. The mutual position between the second film layer 12 and the second film layer 13 can be reversed. Therefore, the film layer structure of the layer of the light splitting film layer 10 can be specifically (a58H1.16L0.58H)N1 (0.8L1.6H0. 8L)N2 (〇-95L1.9H0.95L)N3, (0.8L1.6H0.8L)N2 (0.58H1.16L0.58H)N1 (0.95Ll_9H0.95L)m and (〇.8L1.6H0.8L)N2 (0.95L1_9H0.95L) N3 (0.58H1.16L0.58H)N1 0 Please refer to FIG. 2, which is a graph showing the transmittance characteristic of the spectroscopic film layer 10 according to an embodiment of the present invention. In this embodiment, The film layer structure of the light-splitting film layer 10 is (a58HL16L058H)3 (0 see 1. Book 0 see) 4 (0_95L1.9H0.95L) 3, the Η represents a film layer of high refractive index material having an optical thickness of λ/4; L represents a low refractive index material film layer having an optical thickness of λ/4, wherein, in 200925649, the *refractive index material is a group of pentoxides, and the refractive index thereof is "two." Oxidized crushed It is 1.468. The λ is 450n.ni. Figure 2 shows the transmittance and wavelength of the spectroscopic film layer 1 when the incident angle of incident light is 41 45 and 49. It can be seen from Figure 2. The transmittance of the three wavelengths of 405 nm, 66 〇 nm, and 785 nm does not change much when changing from the incident angle, and thus the spectroscopic film layer 10 can tolerate a change in incident angle of incident light. In addition, as can be seen from Fig. 2, the incident angle © is 41°, 45. And 49. The incident light has a lower transmittance at three wavelengths of 405 nm, 660 nm and 785 nm than other visible light, so that the three kinds of light in the optical disk drive have higher utilization rates. It can be used as 45 in HD-DVD, DVD and CD systems. The split film of the incident beam splitter. In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and those skilled in the art of the present technology will be equivalently modified or changed according to the spirit of the present invention. All should be covered by the following patent application. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a spectroscope provided by an embodiment of the present invention. Fig. 2 is a graph showing the transmittance characteristics of a spectroscopic film layer provided by an embodiment of the present invention. [Main component symbol description] Beam splitter 100 Split film layer 10 9 200925649 First - - Film layer 11 Second film layer 12 J L film layer 13 Substrate 20
❹ 10❹ 10