(OCR) Optical Character Recognition Equipment(OCR)

(optical) emission spectrograph

(OTDR) Optical Time-Domain Reflectometers(OTDR)

[endoscopic]optical fibers

1 550 nm fiber-optical join-network from city to county

1 550 nm optical fiber transmission system

1 550 nm optical transmission

1 550nm Optical Transmission

1×N electro-optical switching

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

2kL method of the optical-path difference

3 D optical digitizing