off-axis elliptical mirror
离轴椭圆镜

• ignition
• ignition temperature
• ignitor discharge
• II irtron
• III-V long-wavelength detectors for communication
• Iintrinsic jointloss
• I Irtran-II
• iischromatic surface
• illuminance
• illuminance meters
• illuminant
• illuminated
• illuminated body
• illuminated magnifier
• illuminated table
• illuminating angle
• illuminating beam
• Illuminating Engineering Society
• illuminating lens
• illuminating poer
• illumination
• illumination device
• illumination distribution
• illumination factor
• illumination level