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Group number     VP102.Z Description: Viewport, Extended Range

Extra information

Specifications:

Materials
-- Flange: 304 Stainless steel
-- O-ring: Viton®
-- Optics: See Table
Magnetic Materials: Yes
Transmission Range 0.12 to 20 Microns (See table)
Temperature Range -8°C to 204°C

Extended Range:
? Optics: Zinc Selenide, Cleartran, Magnesium Fluoride, Calcium Fluoride
? Temperature Range: -8°C to 204°C
? Standard transmission ranges from 0.12 to 20 microns
? Viewing diameter of .50? or 1.1?
? Anti-reflective (AR) coatings are optional Extreme / Custom Design
? Double viewports
? Viewing diameters exceeding 7 inches
? Internal pressures to 80,000 psig
? RF applications and special configuration requirements Installation
Standard installation mountings include:
? Braze (sapphire only)
? Weld (Pulse-TIG, TIG, Laser, E-Beam)
? ConFlat flange
? ISO KF flange
Applications
A few of the many applications in which
these viewports are commonly used are:
? Semiconductor processing equipment
? Accelerators
? Furnaces
? Instrumentation
? Analytical test and measurement equipment
? CO2 lasers
? Multispectral applications
? Optical imaging
? Materials processing
? Thermometry
? Pyrometry

Zinc Selenide ? Best transmission available at 10.6 micron (CO2 laser fundamental line) and in the visible.
It has some absorption in the blue-green causing it to appear yellow.
The index of refraction is high and thus requires anti-reflection coatings on both sides for optimum performance.
This polycrystalline, CVD grown material is strong, though relatively soft compared to other crystalline, optical materials.
It is non-hygroscopic. ZnSe sublimes at 300°C and reacts violently with strong mineral acids.