157nm optical lithography

157um optical lithography

optical projection

projection optical system

193 nm projection lithography

Soft X-ray projection lithography

(OCR) Optical Character Recognition Equipment(OCR)

(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

1N optical switch

2-D optical frequency-time coding

2-D optical orthogonal codes(OOC)

2D optical sensor array

2-D optical sensor array

3 D optical digitizing

305 optical cement