- Optical instruments--Congresses (2)
- Lenses--Design and construction--Congresses (1)
- Light emitting diodes--Congresses (1)
- Optical instruments--Design and construction--Computer programs--Congresses (1)
- Optical instruments--Design and construction--Congresses (1)
- Optical measurements--Congresses (1)
- Security systems--Congresses (1)
- Semiconductors--Congresses (1)
- Thin films--Congresses (1)
- Thin films--Deign and construction--Congresses (1)
- Thin films--Industrial applications--Congresses (1)