- Accu-scope
- Bioptechs, Inc.
- Bio-Rad Laboratories
- Chroma
- Cosmic Digital Microscopes
- Keyence Corporation
- Leica, Inc.
- Melles Griot
- Meridian Instruments
- Nikon, Inc.
- Noran Instruments
- Olympus America
- Omega Optical
- Optics for Research
- Oriel
- Photometrics
- Quantitative Imaging Corporation
- Vermont Optechs
- Carl Zeiss, Inc.