(OCR) Optical Character Recognition Equipment(OCR)

(optical) emission spectrograph

(OTDR) Optical Time-Domain Reflectometers(OTDR)

1 550 nm optical fiber transmission system

1 550 nm optical transmission

1 550nm Optical Transmission

1×N optical switch

1550 nm Optical network

157nm optical lithography

157um optical lithography

1N optical switch

2-D optical frequency-time coding

2-D optical orthogonal codes(OOC)

2D optical sensor array

2-D optical sensor array

305 optical cement

380 nm aerosol optical depth

3D optical disc storage

3D optical layout design

3-D optical measurement