Jobin Yvon Ltd
HORIBA Jobin Yvon Excellence in Optical Spectroscopy ... Since 1819
http://www.jobinyvon.co.uk/

Sciencetech Inc.
Optical spectroscopy from the ultraviolet to the far-infrared. Products include light sources, monochromators, detectors and accessories.
http://www.execulink.com/~scitech

Spectral Energy Corp.
Monochromators, grating and quartz prism types from 100mm to 250mm focal lengths.
http://www.spectralenergy.com/

Optigraph
Optigraph: HOPG, graphite monochromators, doubly bent graphite monochromators
http://www.optigraph.fta-berlin.de/

Acton Research Corporation
Princeton Instruments/Acton is the world's leading provider of high-performance solutions to the scientific imaging, industrial imaging, x-ray, spectroscopy, security and laser optics markets.
http://www.acton-research.com

Sciencetech
Designers and manufacturers of monochromators, spectrometers, detection systems, and light sources. Specializes in modular optical spectroscopic systems.
http://www.execulink.com/~scitech/

JY Horiba
HORIBA Jobin Yvon Excellence in Optical Spectroscopy ... Since 1819
http://www.isainc.com/

McPherson, Inc.
McPherson, Inc. manufactures Instruments and Systems for Spectroscopy through the optical electromagnetic spectrum. We design and build tools that measure the frequency and intensity of light wavelengths / rays with good spectral resolution over a wide free range. McPherson instruments are available for teaching, physics and astronomy applications through the X Ray, Vacuum, UV, Visible and Infrared (IR, including MWIR and LWIR) wavelengths. Vacuum and ultra high vacuum (UHV) models are available in most designs. McPherson delivers laboratory spectrometers for fiber optic, Raman, reflectance, transmittance and absorbance. Our imaging spectrographs are for plasma diagnostics and optical monitoring. For broadband, full spectrum, color and spectral line instruments consider our monochromator spectral test stations. In addition, our applied systems to meter detector response, and analyze lighting, filters, glass and chemicals or control (ultraviolet or full spectrum) radiation generated from light sources. We like to offer workstations to allow your spectrum determination and analysis in the teaching and research science lab. We offer unique light measuring tools like the quartz prism monochromator and novel accessories like broadband, spectrally agile reflective telescopes to complement your system. We also repair and recondition used spectrometers and monochromators (built by McPherson, Inc.)
http://www.mcphersoninc.com/

SPECS Scientific Instruments
Instruments for surface science and UHV components for XPS, LT-STM, MBE, ESCA, LEED, EELS, Auger, UPS, SIMS, PEEM, LEEM, vacuum chambers, effusion cells, ECR plasma atom ion source, e-beam evaporator
http://www.specs.com