photon statistics
光子统计学，光子流统计分布

• artificial radioactivity
• artificial source
• Artificial Star
• artillery mil
• artoregistration
• artwork
• arylidene dye laser
• asa photographic standard
• asbestos
• asbestus
• aspect
• aspect angle
• Aspect of Image
• aspect photocell
• Aspect Ratio
• asphalt
• aspheric
• Aspheric
• aspheric correcting lens
• aspheric curve generator
• asphericity
• asphericity coefficient
• Aspheric Lens
• Aspheric Lens System
• Aspheric Mirror