| Abbreviation | Definition |
|---|---|
| OAVD | Off-Axis Viewing Device (Australia) |
| OCIS | Optics Classification and Indexing Scheme |
| OCT | Optical Coherence Tomography |
| OECS | Optics of Excitons in Confined Systems |
| OEK | Optics Expansion Kit |
| OMND | Optical Micro/Nano Resonators and Devices |
| OPN | Optics and Photonics News |
| OPN | Optics Photonics News |
| OPO | Ophthalmic and Physiological Optics |
| OPOD | Optics Picture of the Day |
| OSUM | Optics Society at the University of Michigan |
| PFO | Programmable Focusing Optics |
| PGO | Precision Glass and Optics |
| PGO | precision glass optics |
| PMOG | Photonics and Mathematical Optics Group |
| PNRUITMO | Petersburg National Research University of Information Technology, Mechanics and Optics |
| POG | Precision Optics Gera |
| PS | Photon Stop |
| QKDP | Quantum Key Distribution Protocol |
| QOG | Quantum Optics Group |