臺灣博碩士論文加值系統

當我們去評估光閥式投影系統時，每個元件的使用效率都可獲得。然而，惟缺光源和反射罩組合的使用效率，但在評估光閥式投影系統時，它卻是一個很重要的因素。因為它代表的是由光源出來的流明值會有多少會偶合到系統。而這個因素將因不同的設計者而有差異。這個因素關係到光源的大小、系統孔徑的面積和系統的F/#。這些幾何上的參數所影響的值，我們就稱之為Etendue，它在法國字上解釋是指"光學度量或"光學不變量"。
使用Etendue的觀念，系統設計者能夠完整地評估光閥式投影系統的效能。在本論文，我們將以Etendue的觀念為基礎，提出一個蔪新的方法去估評光閥式投影系統。

When one estimates the throughput of the light valve LCD projectors prior to constructing prototype, the efficiency for each component in the LCD projector is specified. However, efficiency for the lamp-reflector combination is lacking, which in fact is among the most important factors to estimate the efficiency of the light valves projector. It is crucial because it represents how many lumens are coupled into the systems that are collected by the reflector. This factor varies, depending on how the system is designed. It is also related to the size of the source, the area of the aperture stop of the system, and the F/# of the system. Those geometry parameters influence a quantity we call it Etendue, which is a French word means ''optical extent'' or ''optical invariant''.
Adopting Etendue concept, the system designer will be able to estimate the throughput of the light valve projectors completely. In this paper, we will provide an innovative method estimate efficiency via the use of the collected lumens from the
source-reflector combination, based upon the Etendue concept.

Table of Contents ……………………………………………………………………...i
List of Figures ………………………………………………………………………...ii
List of Tables …………………………………………………………………………iii
Chapter 1 Introduction ………………………………………………………………..1
Chapter 2 Basic theory of the Etendue ………………………………………………..3
2.1 Definition of the Etendue …………………………………………………..3
2.2 Characteristics of the Etendue…………………………………………….5
2.3 Etendue at a flat surface…………………………………………………….6
2.4 Etendue-conserving transformations ……………………………………….8
2.5 Etendu-limited systems. ……………………………………………………9
2.6 Usable Etendue…………………………………………………………….11
Chapter 3 Lumens VS. Etendue Model………………………………………………13
3.1 Lumens VS. Etendue Parametric Model…………………………………..13
3.1.1 Etendue of a cylindrical surface……………………………………14
3.1.2 Relationship between the Etedue and lumens……………………...16
3.2 Lumens VS. Etendue Realistic Lamp-Reflector Model…………………...21
3.2.1 Realistic Arc Lamp Information……………………………………23
3.2.2 Ray Tracing the Realistic Arc Lamp-Reflector Combination……...27
Chapter 4 Example for Use of the Lumens VS. Etendue Function…………………..29
4.1 Throughput of a Single Panel LCD Projector……………………………29
4.2 Throughput in a Three-panel Projector…………………………………..33
Chapter 5 Conclusion………………………………………………………………...36
Reference………………………………………………………………………...37

[1] Edward H. Stupp and Matthew S. Brennesholtz "Projection Displays" Wiley-SID, P.265~280, Dec. 1998.
[2] R. W. Boyd, "radiometry and the Detecion of Optical Radiation " Wiley, New York, 1983 P. 89~93.
[3] S. Lungershausen, S.K. Eckhardt and J. M. Holocomb "Light engine design: the software dilemma" Proc. SPIE Vol. 3296, Jan. 1998, P.53-61, Projection Displays IV, Ming H. Wu; Ed.
[4] John Schweyen, Kevin Garcai, Philip Gleckman " Geometrical optical modeling considerations for LCD projector display systems." Proc. SPIE Vol.3013, P.126-140, Mar 1997, Projection Displays III, Ming H. Wu; Ed.
[5] M. S. Brennesholtz, "Light collection efficiency for light valve projection systems" Proc. SPIE Vol. 2650, p. 71-79, May 1996 Projection Displays II, Ming H. Wu; Ed.
[6] Jacobson, Benjamin A.; Gengelbach, Robert D.; Stewart, Charles N.; Rutan, Douglas M. "Metal halide lighting systems and optics for high-efficiency compact LCD projectors" Proc. SPIE Vol. 3296, Jan. 1998, P.38-45, Projection Displays IV, Ming H. Wu; Ed.
[7] ASAP version 6.6.3 Introductory Tutorial, Breault Research Organiztion, Tucson, AZ.
[8] ProSource version 5.3.1 Radiant Imaging Cop. Long Beach, California