BD光學頭幾何光學研究與設計
發(fā)布時間：2019-03-11 12:11
【摘要】：藍光標準的制定是由索尼、日立、松下、先鋒等九家公司于2002年2月經(jīng)過一周的激烈討論后,達成共同的產(chǎn)業(yè)協(xié)議。藍光光盤存儲是在DVD光盤存儲系統(tǒng)的基礎上衍生而來的,相對DVD而言其存儲密度高、容量大、保存壽命長等一系列優(yōu)點。截至現(xiàn)在,藍光是最先進的大容量光盤格式,其容量能達到單層25G,雙層50G,其讀取速率1倍速為36Mbps即4.5MB/S,可以存儲超過2小時播放時間的高清數(shù)字視頻內(nèi)容,或超過13小時播放時間的標準電視節(jié)目。 在整個BD光盤系統(tǒng)中,其核心部件為光學頭,它的主要功能是精確的讀取光盤上的信息,并將光信息轉(zhuǎn)換為電信號提供給后端處理,其讀取信號質(zhì)量的好壞直接影響了最終所呈現(xiàn)的效果。目前關于光學頭的開發(fā)主要掌握在國外大的電子廠家手中,國內(nèi)的的電子廠家大多對齊直接進行購買,因此自主開發(fā)光存儲的關鍵部分光學頭具有極高的戰(zhàn)略價值。 本文首先對BD光學頭的基本原理和構(gòu)成進行了介紹,主要闡述了如下幾方面內(nèi)容： (1)幾何光學的基本原理,幾何光學的基本定律 (2)像差理論的介紹,主要從幾何光學角度對像差進行了簡要說明 (3)將BD光學頭系統(tǒng)與DVD和CD光學系統(tǒng)進行了對于,闡述了主要區(qū)別點 (4)對BD光學系統(tǒng)的主要部件進行了詳細說明 其次,本文對光學系統(tǒng)中的一個重要部件激光準直徑的設計進行了詳細的描述,由于激光準直徑目前的技術(shù)主要掌握在國外大的鏡片廠家的手中,其價格非常高,為了降低產(chǎn)品成本,自主設計激光準直鏡有及其重要的意義。對于該鏡片的設計主要運用Zemax仿真設計,在鏡片的設計中,其優(yōu)化函數(shù)的建立直接影響到最終的結(jié)果,因此本文對Zemax中的優(yōu)化函數(shù)相關部分進行了詳細的介紹。在軟件的使用過程中,對軟件進行了二次開發(fā),運用了其中的宏功能,大大縮短了設計周期,也對設計結(jié)果進行了充分的評價。 再次,本文介紹了BD光學系統(tǒng)中的相關計算,主要介紹了光利用效率的計算的光柵的相關計算。在光柵的計算過程中,講述了循跡伺服的相關知識。 最后,本文介紹了聚焦伺服的相關知識,講述了聚焦伺服的產(chǎn)生原理,信號的相關參數(shù)以及如何運用Fred軟件的宏功能模擬聚焦伺服. 在BD光學系統(tǒng)的設計中,主要運用了目前成熟的光學設計軟件Zemax和Fred。其鏡片的設計主要運用¨Zemax軟件,Zemax為目前國內(nèi)外鏡片設計的主流軟件,其操作簡單,優(yōu)化功能強大。在光學建模方面我們運用了Fred軟件,其更形象逼真。并且在這兩個軟件的使用中我們都對其進行了二次開發(fā),大大的縮短了開發(fā)周期,節(jié)約了成本。
[Abstract]:Blu-ray standards were set by Sony, Hitachi, Panasonic, Pioneer and nine other companies in February 2002 after a week of intense discussions, reached a common industrial agreement. Blu-ray optical disk storage is derived from the DVD optical disk storage system. Compared with DVD, it has a series of advantages, such as high storage density, large capacity and long storage life, etc. Up to now, Blu-ray is the most advanced high-capacity optical disc format, its capacity can be up to single-layer 25G, double-50G, its read rate 1 times the speed of 36Mbps, or 4.5 MB, can store more than 2 hours of playback time of high-definition digital video content. Or more than 13 hours of standard television programs. In the entire BD optical disk system, its core component is the optical head, its main function is to accurately read the information on the optical disk, and convert the optical information into electrical signals to be provided to the back-end processing. Its reading signal quality has a direct impact on the final presentation of the effect. At present, the development of optical head is mainly mastered in the hands of large electronic manufacturers abroad, and most of the domestic electronic manufacturers buy directly in alignment. Therefore, it is of great strategic value to develop the key part of optical head for optical storage independently. In this paper, the basic principle and structure of BD optical head are introduced, including the following aspects: (1) the basic principle of geometric optics, (2) the basic law of geometric optics (2) the introduction of aberration theory, The aberration is briefly explained from the point of view of geometrical optics. (3) the BD optical head system is compared with the DVD and CD optical systems. The main difference point (4) is described in detail about the main components of BD optical system. Secondly, the design of laser quasi-diameter, an important component of optical system, is described in detail in this paper. In order to reduce the cost of laser collimation mirror, it is of great significance to design laser collimation mirror independently because the current technology of laser quasi-diameter is mainly mastered in the hands of large lens manufacturers abroad, and its price is very high. The design of the lens mainly uses the Zemax simulation design. In the design of the lens, the establishment of the optimization function directly affects the final result. Therefore, this paper introduces the relevant parts of the optimization function in Zemax in detail. In the process of using the software, the software is re-developed, the macro function is used, the design cycle is shortened greatly, and the design result is fully evaluated. Thirdly, this paper introduces the relevant calculation of BD optical system, mainly introduces the calculation of grating for the calculation of optical utilization efficiency. In the process of grating calculation, the related knowledge of tracking servo is described. Finally, this paper introduces the relevant knowledge of the focus servo, describes the generation principle of the focus servo, the relevant parameters of the signal and how to simulate the focus servo by using the macro function of the Fred software. In the design of BD optical system, the mature optical design software Zemax and Fred. are mainly used. Its lens design mainly uses the Zemax software, the Zemax is the current domestic and foreign lens design mainstream software, its operation is simple, the optimization function is powerful. In the aspect of optical modeling, we use Fred software, which is more vivid. And in the use of these two software, we have carried on the second development, greatly shortened the development cycle, saved the cost.
【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TP333.4
本文編號：2438272
[Abstract]:Blu-ray standards were set by Sony, Hitachi, Panasonic, Pioneer and nine other companies in February 2002 after a week of intense discussions, reached a common industrial agreement. Blu-ray optical disk storage is derived from the DVD optical disk storage system. Compared with DVD, it has a series of advantages, such as high storage density, large capacity and long storage life, etc. Up to now, Blu-ray is the most advanced high-capacity optical disc format, its capacity can be up to single-layer 25G, double-50G, its read rate 1 times the speed of 36Mbps, or 4.5 MB, can store more than 2 hours of playback time of high-definition digital video content. Or more than 13 hours of standard television programs. In the entire BD optical disk system, its core component is the optical head, its main function is to accurately read the information on the optical disk, and convert the optical information into electrical signals to be provided to the back-end processing. Its reading signal quality has a direct impact on the final presentation of the effect. At present, the development of optical head is mainly mastered in the hands of large electronic manufacturers abroad, and most of the domestic electronic manufacturers buy directly in alignment. Therefore, it is of great strategic value to develop the key part of optical head for optical storage independently. In this paper, the basic principle and structure of BD optical head are introduced, including the following aspects: (1) the basic principle of geometric optics, (2) the basic law of geometric optics (2) the introduction of aberration theory, The aberration is briefly explained from the point of view of geometrical optics. (3) the BD optical head system is compared with the DVD and CD optical systems. The main difference point (4) is described in detail about the main components of BD optical system. Secondly, the design of laser quasi-diameter, an important component of optical system, is described in detail in this paper. In order to reduce the cost of laser collimation mirror, it is of great significance to design laser collimation mirror independently because the current technology of laser quasi-diameter is mainly mastered in the hands of large lens manufacturers abroad, and its price is very high. The design of the lens mainly uses the Zemax simulation design. In the design of the lens, the establishment of the optimization function directly affects the final result. Therefore, this paper introduces the relevant parts of the optimization function in Zemax in detail. In the process of using the software, the software is re-developed, the macro function is used, the design cycle is shortened greatly, and the design result is fully evaluated. Thirdly, this paper introduces the relevant calculation of BD optical system, mainly introduces the calculation of grating for the calculation of optical utilization efficiency. In the process of grating calculation, the related knowledge of tracking servo is described. Finally, this paper introduces the relevant knowledge of the focus servo, describes the generation principle of the focus servo, the relevant parameters of the signal and how to simulate the focus servo by using the macro function of the Fred software. In the design of BD optical system, the mature optical design software Zemax and Fred. are mainly used. Its lens design mainly uses the Zemax software, the Zemax is the current domestic and foreign lens design mainstream software, its operation is simple, the optimization function is powerful. In the aspect of optical modeling, we use Fred software, which is more vivid. And in the use of these two software, we have carried on the second development, greatly shortened the development cycle, saved the cost.
【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TP333.4
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