PerkinElmer Spotlight 200, User Manual, Page: 80 / 132

80 . Spotlight 200 User’s Guide
ATR Objective Specification
The ATR cassegrain is fitted to the microscope and the ATR crystal holder is supplied
separately.
ATR crystal materials
Germanium (Ge), Silicon (Si), and Diamond Coated Germanium
Range of measurement
Ge: 5500 cm
− 1
to 600 cm
− 1
Ge/Di: 5500 cm
− 1
to 600 cm
− 1
Si: 7800 cm
− 1
to 800 cm
− 1
Area of contact with sample
Nominally 100 µm diameter flat surface. Single internal reflection from surface.
Maintenance
The ATR assembly may be removed (see
Removing the ATR Crystal Holder from the
Microscope
on page 87), cleaned (see
Cleaning the ATR Objective
Crystal on page 90), and
replaced and aligned by the user (see Fitting the ATR Crystal Holder to the Microscope on
page 81).