Sterling Precision Optics
Sterling Precision optical manufacturer has equipment that includes high speed polishing, band sawing, drilling, coating, grinding. Capability to supply variety of optics and precision machined glass.
http://www.sterlingprecision.com/

Changchun Daheng Optical Instrument Factory
Manufacturer of prism, wedge, mirrors, lens, cylindrical lens with optical glass and optical crystal. China.
http://www.dhoptics.com/html/ywjianjie.htm

Oldham Optical U.K.
Manufacturer of Astronomical and Industrial Optics to the Professional and Amateur Market. Specialising in Optics for Newtonian and Cassegrain Telescopes. Product range covers Concave and Convex Mirrors, Optical Flats and Windows, Prisms, etc
http://www.oldham-optical.co.uk/

Optical Works Ltd
Optical Works, mirrors, lenses prisms, beamsplitters, optical flats, optical bench, pressure gauge
http://www.opticalworks.co.uk

Boxin Optical Instrument Company
Provides lab-quality optical products such as lenses, microscopes and mirrors.
http://www.bxoptic.com

Changchun XinXin Optical Electron Technology
Provides optical products such as lenses, prism and mirrors. China.
http://www.xinxinopt.com

Moonlight Optics
MLoptic: China optical manufacturer and exporter of optical lens, precision optical systems, precision optical components, IR optics, asphere, parabolic reflectors, aspheric lens, cylindrical lens, Optical Design, optical systems, lens design, lens system, medical system, Aspheric Lenses, ZnSe lens, Ge lens, silicon lens, thin film coating, opto-mechanical assembly, opto-mechanical test
http://www.moonlight-optics.com

Tinsley Laboratories
Specializes in the manufacture of aspherical optics and light-weighted Beryllium mirrors using computer-controlled optical surfacing technologies. The company is famous for producing the optics within the COSTAR optical package which corrected the Hubble Space Telescope's optical flaws.
http://www.asphere.com/

JML Optical Industries, Inc.
Designer and manufacturer of optical components such as singlets, doublets, triplets, mirrors, planos, prisms, filters, coatings, shutters, irises, reticles and diffusers.
http://www.jmloptical.com/

Advanced Optics, Inc.
Manufacturer of precision and custom optical components including optical flats, front surface mirrors and optical grade windows. Available in Pyrex, Fused Silica or Zerodur in several different accuracies either in stock or made to your specifications.
http://www.advancedoptics.com/