Nor-Cal Products offers a complete line of viewports for vacuum chambers with NW, ISO and CF flanges. CF flanged viewports are available with fully annealed 7056 glass or fused silica.Weld stub viewports are available for  welding onto new or existing chambers. Special materials and coatings, such as sapphire and anti-reflective (AR) coating, are available on request. Glass provides a large distortion free viewing area at low cost. Quartz and fused silica provide superior ultraviolet radiation transmission and resistance to thermal shock.
Nor-Cal manufactures glass adapters in 7740 Pyrex and 7052 glass. These adapters are useful for mounting glass accessories to metal high vacuum systems, or to attach flange mounted components to glass systems. Glass adapters are available with NW, CF, and ISO flanges as standards

NW Viewports 
7056 glass NW viewports in a one-piece assembly. This viewport replaces a blank off cap and uses a standard NW centering ring assembly and clamp for sealing. NW Zero Length Viewports Nor-Cal’s zero length viewports have an innovative design which places the viewing glass inside the centering ring. The clear, polished quartz can be removed for cleaning or replacement.Zero length viewports are available for NW-40 and NW-50 flange sizes. ISO & CF Zero Length Viewports ISO and CF viewports are one-piece assemblies (See diagram to the left). For clamps and fastening hardware, please refer to the appropriate flange section. Viewport Weld Stubs Weld stub viewports are provided with a tube for welding onto an existing chamber

NW, ISO & CF Glass Adapters  
Nor-Cal manufactures glass adapters in 7740 Pyrex and 7052 glass. These adapters are useful for mounting glass accessories to metal high vacuum systems, or to attach flange mounted components to glass systems.
These adapters are available standard with NW, CF, and ISO flanges.

Viewport Shutters
Nor-Cal Products manufactures shutters for viewport shielding. These shutters are mounted behind a viewport to prevent build-up of deposition materials on viewports while in the closed position. They use a single plate shutter with a 90º opening rotation. Nor-Cal’s design completely shields the viewing glass when the shutter is in the closed position. An integrated PRM-133 rotary motion feedthrough provides smooth actuation and a positive locking screw. Please call for custom actuation options, such as motor drives or special flanges.