Vacuum Optics Catalogue - March 2022

Optics
Torr Scientific has incorporated optical quality windows in
to a wide range of viewports in response to growing demand
for scientists carrying out laser experimentation
within UHV systems. The company is also able to supply
polished optics in a variety of forms and materials. Standard
viewport windows can be offered as well as optics to
custom specification. Precise surface qualities and optical
specifications can be quoted.
Torr Scientific invested in a new Perkin Elmer UV/Vis/IR
Spectrophotometer in January 2011. The spectrophotometer
extends the range at which the company is able to
measure both reflectance and transmission to between
190nm and 3.2 microns. The instrument will be used as an
inspection tool for incoming optics and for manufactured
UHV viewports with anti-reflective coatings optimised for
particular customer applications. The spectrophotometer
brings greater quality control to the business and will extend
TSL’s coating capability.
Optics
The e-beam vacuum coating system is used predominantly
to process anti-reflective coatings. TSL upgraded the electronic
control units on the e-beam system in 2009 in partnership
with Ferrotec, specialists in electron beam evaporator
equipment. The upgrade has improved efficiency and
reliability of the anti-reflecting coating process. Viewports
are coated to customer specified wavelengths of application.
Below are examples of reflectance curves for a BBAR
broadband coating to cater for a wavelength range and for
a VAR coating optimised for a single wavelength typically
used for single laser applications.
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