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| Innovations in Optics, Inc. | |
| CRI Inc. Cambridge Research & Instrumentation, Inc. | ||
| Guild Optical Associates, Inc. 11 Columbia Drive - Amherst, NH 03031 USA - - | ||
| LightPath Technologies, Inc. | ||
| Nanjing Saifei Electro Optics Co., Ltd. | ||
| BES Optics Inc. | ||
| PFG Optics | ||
| Brysen Optical Corporation | ||
| Laser Optics, Inc. | ||
| NOEL Newcastle Optical Engineering Limited | ||
| Plan Optik GmbH | ||
| Daheng Optical Instrument Factory | ||
| Brighten Optics Ltd. | ||
| Displays & Optical Technologies, Inc. | ||
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