diffracton by plane screen
平面屏幕衍射

• logic system
• logitro
• logn arm mirror
• lognormal atmosperic dchannel
• Lohmann hologram
• Lommel function
• London equations
• long afterglow
• long and short dash line
• long crown glass
• long distance exerography
• long-distance guided communication
• long-distance holographic imgery
• long distance holography
• long electrical wave
• long-focal length lesn
• long focus
• long-focus lens
• long-focus objective
• Long haul optical link
• longitude
• longitudianal aberration
• longitudianal chrmatic aberration
• longitudian clinometer
• longitudianl