PerkinElmer Lambda 25, User Manual

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Lambda 25, 35, 45 User’s Guide
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The exit slit restricts the spectrum segment to a near-monochromatic radiation beam.
The slits provide a spectral bandpass of 1 nm on the Lambda 25, and are selectable
to be 0.5, 1, 2, or 4 nm on the Lambda 35 or 45.
From mirror M3 the radiation is reflected onto a beam splitter which allows 50% of
the radiation to pass onto plane mirror M4, and reflects 50% of the radiation onto
plane mirror M5.
Mirror M4 focuses the radiation beam in the sample cell.
The beam then passes through a convex lens onto the photodiode detector.
Mirror M5 focuses the radiation beam in the reference cell.
The beam then passes through a convex lens onto the photodiode detector.
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