immersed focal-plane lens
浸没焦面透镜

• order of triangulation
• order parameter
• order-sequence
• order-sorter
• order tarnsition
• ordinal
• ordinal number
• ordinary differential equation
• ordinary ight source
• ordinary image
• ordinary index of refraction
• ordinary ray
• ordinary refractive index
• ordinary wave
• ordinate
• ore
• OR elementorgan
• organic chelate iquide laser
• organic compound
• organic dye laer
• organic dye solution laser
• Organic Electro-Luminescence Display
• organic glass
• organic laser
• organic liquid laser