JP Manufacturing, Inc. - Southbridge, MA
Manufacturer, Custom Manufacturer, Service Company
Custom manufacturer of double convex & plano convex lenses. Double convex lenses are available in 0.295 in. to 3.453 in. dia. with 0.424 in. to 8.750 in. focal length & 5X to 8 1/2X magnification. Plano convex lenses are available in 0.174 in. to 2.0 in. dia. with 0.160 in. to 23.622 in. focal length & magnification up to 100X. Made in USA.
www.jpmfg.com/standardlenses.html

Optometrics LLC - Ayer, MA
Manufacturer, Custom Manufacturer
Manufacturer Of Optical Components & Instruments, Research, Academia & Analytical Instruments

Opco Laboratory, Inc. - Fitchburg, MA
Manufacturer, Service Company
Manufacturer of optical lenses including coating, concave, convex, plano convex & plano concave lenses. Specifications of lenses include dia. up to 300 mm, surface accuracy up to Lamda/20, angles (wedge or prism) down to seconds, centration down to seconds & tolerance up to 10 microns. Materials used include fused silica, glass, silicon, germanium, sapphire, calcium & magnesium fluoride & zinc selenide. Capabilities include designing, testing, CNC fabricating & coating.