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30 . Spotlight 200 User's Guide
A Guided Tour of the Spotlight 200
The Spotlight 200 enables you to collect IR spectra from extremely small samples. The
PerkinElmer cassegrain collection optics give high-performance infrared microspectroscopy.
The microscope includes a camera and viewing system that magnifies the visible-light image
of the sample so that you can see, position, and isolate a point of interest. The image of your
sample is displayed in the Monitor Visible window on your PC monitor. Spectrum software
enables you to control the operation of your Spotlight 200, and collect IR spectra from the
sample.
The microscope includes the following features:
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A high-performance cassegrain mirror system; this has a wide collection angle (high
numerical aperture) and is highly efficient in collecting infrared radiation for
microspectroscopy.
Spectra can be collected in either reflectance or transmittance modes.
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Internal coaxial LED illumination, with variable intensity.
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An automatic infrared aperture that closes to the size and rotation selected when you
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choose a scan or monitor command.
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A motorized stage, controlled by a joystick and the Spectrum software, enables you to
find points on your sample and focus the microscope. Two sizes of stage are available:
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Sample sizes up to 75 × 50 mm (part number L1860160)
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Sample sizes up to 160 × 69 mm (part number L1860161)
Some versions of the microscope feature LED lighting of the stage area.
Spectrum software, which controls the operation of the microscope, for example: focus,
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illumination, stage position, adjusting the correction, and changing between reflectance
and transmittance sampling modes.
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Auto-correction to optimize the position of the lower cassegrain for maximum energy
throughput.
A micro-ATR objective for data collection from optically thick and non-reflective
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samples. Manual and automatic ATR objectives are available; the automatic ATR option
also includes a weighbridge to measure the pressure applied to the sample during
analysis.
Automatic image analysis, data collection and post-run processing of collected spectra.
•
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A single cassegrain to send both infrared radiation and visible light to the remote
aperture. The microscope continuously views and monitors infrared concurrently; there
is no beampath switching between visible and infrared.
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A removeable lower cassegrain to provide space for thick samples to be studied in
reflectance mode.
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An InGaAs (indium gallium arsenide), DTGS (deuterated triglycine sulfate), or an MCT
(mercury cadmium telluride) MIR detector.
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