optical sight
(1)光学瞄准
(2)光学瞄准具

• illumination photometry
• illumination ray
• illuminator
• illuminometer
• illusion
• illustration
• Imacon
• Imacon camera
• image
• image analyzer
• image analyzers
• image angle
• image attenuation
• image blurring
• image brightness
• image-carrring fiber
• image centroid
• image circle
• image comensation camera
• image comparison
• image conduct
• image conjugate
• image construction
• image contrast
• image converter camera