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| PFG Optics | |
| Melles Griot Optics | ||
| II VI Incorporated / Two-Six /26 | ||
| Oriel Corporation | ||
| Optosigma | ||
| Reynard Corporation | ||
| Optical Components, Inc. | ||
| Janos Technology | ||
| Sunex Inc. | ||
| Casix, Inc. | ||
| Guild Optical Associates, Inc. 11 Columbia Drive - Amherst, NH 03031 USA - - | ||
| Advanced Optics, Inc. | ||
| Xtal Optronics | ||
| Boxin Optical Instrument Co. | ||
| LaCroix Optical Co. | ||
| Daheng Optical Instrument Factory | ||
| Esco Products | ||
| Laurel Industries | ||
| IMPEX High Tech | ||
| UQG Optics Ltd. | ||
| Knight Optical | ||
| Nanjing Saifei Electro Optics Co., Ltd. | ||
| CVI Laser Corporation | ||
| Laser Research Optics | ||
| Präzisions Glas & Optik GmbH | ||
| Brysen Optical Corporation | ||
| Dynasil Corporation | ||
| Laser Optics, Inc. | ||
| Moonlight Optics | ||
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