雷射掃描顯示系統之改進

Abstract

本論文是在描述利用雷射掃描顯示系統來顯示RS-170視頻信號,並提出降 低系統不穩定及縮減電子系統硬體結構的作法,並對不同光學系統的成像 結果及對比度的影響,進行比較.整個影像掃描系統,由1.光源2.灰階度的 調變3.掃描部份4.光學系統5.電子系統等五部份構成整個影像掃描系統, 其中氬離子雷射為光源,聲光調制器用來調制影像資料的灰階度,多面 體(24面)轉鏡負責水平掃描振鏡則負責垂直掃描,電子系統則用來控制整 個掃描顯示系統的同步.本系統所產生的圖像解析度,水平有512個有影像 元,垂直有484條有影像信號的水平線,每像元有256個灰階度,並以每秒30 幀的速度進行掃描. In this thesis the method for improving stability and reducing hardware structure of electronic system of Laser Scan Display System (LSDS)which is applied to display RS-170 video signal is describe.The image qualities and contrasts in different optical systems of LSDS are compared each other. This LSDS consists of five parts:1.light source 2.modulation 3.scanners 4.optical system 5.electronic system.The argon laser is used as light source.The A-O modulator is used to modulate the light beam intensity for 256 gray levels of the image in AM mode.The polygon is used for horizontal scanning and golvanometer for vertical scanning.The electronic part is designed for system control and signal processing. There are 512(H)x484(V) pixels with 256 gray levels for a picture.The frame rate is 30Hz.