Companies that I use frequently and endorse

LFW online
SPIE - The International Society for Optical Engineering
Photonics Media
Thomas Register Search Results
ZEMAX

Optics

Special

Karl Lambrecht Corporation - KLC
PLX Inc.
Epner Technology Inc.
Denton Vacuum Thin Film Deposition Systems Homepage
Richardson Grating Laboratory
Horiba -- JY - Gratings Catalog
Bach Research -- Hyperfine Gratings
IR Fibers
Point Source Ltd Home Page

Optical/NIR or Reflecting

Arizona Optical Systems
Rayleigh Optical Corposation
Optical Surfaces -- UK
Optometrics - Dynasil USA, Inc.
Materion (Barr Associates), Inc.
Ci-Systems
Optics from Custom Scientific
Laser Components Inc., USA:
SPECTROGON
Welcome to Edmund Scientific
Laser Components-German Homepage
CVI -- (Melles Griot)
OptoSigma Online
Dynasil Corporation
JML Optical --(Harold Johnson Optical Laboratories)
Optics for Research

Mid-IR Optics

ISP Optics
OCLI in Santa Rosa became JDS Uniphase -- where is it now?
Laser Optics from II-VI
Janos Technology, Inc.

FPAs

Selex ES Ltd
InfraRed Associates, Inc.
Fermionics Opto-Technology home
Teledyne (Boeing/Rockwell) Detectors
Raytheon (SBRC) Sensors

Cryogenics

Universal Cryogenics
Precision Cryogenic Systems, Inc.
Oxford Instruments plc.
CRYO INDUSTRIES
Janis Research
Cryogenic Stepper Motors - Empire Magnetics Inc.
Phytron Stepper Motors
Lakeshore Cryotronics
Cryomech, Inc.
Infrared Laboratories

Miscellaneous

Ideal Vacuum
Laser Components: Germany
MiniTec Framing
MDC Vacuum Products Corporation
PI - PZT & Piezo Actuators, etc.
DynaOptic Motion
Newport Corporation
Moog -- Motors/Actuators
Leybold - Vacuum components
Fluke Corporation
Sutter