Luminance range compression
亮度范围压缩，发光率范围压缩

• perihelion
• Perimeter
• perimetry
• period
• periodic
• periodic boundary condition
• periodic error
• periodic filter
• periodic focusing
• periodic frequency modulation
• periodic function
• periodic gas lens
• periodic inversion saturation
• periodicity
• periodic law
• periodic modulation
• periodic motion
• periodic potential
• periodic quantity
• periodic relaxation oscillation
• periodic relaxation pulse
• periodic single pulse
• periodic table
• period of otpical cycle
• period of S.H.M