filter element
(1)滤光元件
(2)滤波元件

• planar access couple
• planar array
• planar dielectric waveguid
• planar-diffused transistor
• planar epitaxial phototransistor
• planar hologram
• planar iris
• Planar lens
• planar mirror
• planar mosaic array
• planar optical waveguide
• planar phottransistor
• planar rotor
• planar stripe DH laser
• planar waveguide-type
• Planck function
• Planckian locus
• Planckian radiator
• Planck's blackbody law
• Planck's constant
• Planck's holhrum radiaton
• Planck's law
• Planck's oscillator
• Planck's radiation law
• Planck's spectral radiation formula