ORDIS Optical Reading Direct Input System
electro-optical direct reading spectrum
Optical Direct-reading Spectrometer
ABCD optical system with internal hard-edge aperture
Adaptive Optical System
anamorphic optical system
anamorphotic optical system
angle multi-path optical system
Angle-sensitive optical system
apertured ABCD optical system
aperture-lens separation optical system
apodized optical system
Aspheric Optical System
astigmatic optical system