refractive index profile
折射率分布

• litus paper
• live axle
• live center
• live color camera
• live spindle
• lixiscope
• Lloyd mirror
• load
• load-carrying capacity
• loader
• load-factor
• loading
• loading waeguide
• Load line
• load resistance
• Load test
• loag coeffeicent
• lobe
• lobe shaping
• Local area network
• local communtativity
• local illumination
• local interaction
• local ization
• localized fringe