Fast Access ISO-K 200 Entry Door with Viewing Window, Non-Illuminated, Demountable, 3/8 in. Tempered Glass

This Ideal Vacuum Fast Access ISO-K 200 Entry Door (FAED) with tempered glass viewing window can be mounted to any vacuum chamber with an ISO 200 port (either ISO-K or ISO-F). These FAEDs include a manual knob for tightening the access door and are made of stainless steel with Viton O-rings and an external blue anodized aluminum window retaining ring. The approximate viewing diameter and door opening is 7.8" with a viewing area of 47.8 in².

Fast Access ISO Entry Doors (FAEDs) with windows are typically used in place of blank ISO flanges and are often used for load-lock applications. FAEDs with windows are available in ISO-100, 160, 200 and 250 flange sizes. These ISO-K flanged windows use either single or double claw clamps along with a centering ring fitted with an O-ring for mounting. Use double claw clamps to mount to other ISO-K flanges. Use single claw clamps to mount to ISO-F flanges with bolt holes (smooth bored or threaded). See the table below for claw clamps and centering rings.

Please download and read the IVP Common Vacuum Fittings - Selection and Assembly Guide for hardware selection and for joining procedures for making leak-tight connections.

Standard tempered glass windows are a popular low cost option, commonly used for general, direct observation of roughing or high-vacuum chamber processes and can be used to facilitate optical alignments of chamber components, observe degassing of fluids, or used to help teach in-vacuo processes by direct observation. The glass material is standard low-iron float glass. Surface quality and flatness is Q4 per ASTM 1036-06 and 1048-04. The low iron content of the glass results in it having a slight blueish tint. This economical glass is unsuitable for high power laser experiments.

We also offer high purity fused silica windows which are ground and polished to optical grade on both sides with a total thickness variation (TTV) of <10µm, a surface finish of S/D 40/20, and a surface roughness of Ra < 1 nm. These windows have appreciably improved transmittance, and a wider useful wavelength range than standard glass. Characteristics include extraordinarily low refractive index variations, low birefringence values, and an ultra-low thermal expansion coefficient. Fused silica is used for transmissive optics where a high laser damage threshold is required. Fused silica is used for optics operating in the deep UV, visible, and the near infrared wavelength range.

These opening viewports are field serviceable. Window panes can be replaced or changed to another material if experiment requirements change. Please see the graph below for the transmissivity curves of tempered glass and fused silica:

Fast Access ISO Entry Doors with windows employ a zero metal-to-glass contact design that holds a 3/8” thick window pane to a stainless steel ISO mounting plate. Windows are cushioned by O-rings on both window faces and use PTFE dowel pin spacers around the window edges. This cushioned window mounting system ensures operator safety and window longevity. The simple construction makes the FAED field serviceable. Bakeout to 150°C is permissable.

NOTE: All viewing windows or ports are inherently fragile, should be handled carefully, and always inspected before use. Ideal Vacuum viewing windows are designed and rated for VACUUM ONLY and can be susceptible to thermal shock if exposed to rapid temperature changes (>10° C /min). If directing a laser beam through the window, make sure the laser’s wavelength can be reasonably transmitted through the window’s material. Please download and read all the safety warnings in the Fast Access ISO Entry Door User Manual.