Download Dell 3100 Specifications

System Overview
Dimension 3100 SPM Overview
Figure 1.3b Dimension SPM Head
La ser Sp ot Detector Screen (d ark r ed )
L aser aim adju stmen ts
Po sition Se nsitive De tecto r
(special photo diode)
Laser dio de
Collimator
Beamsp litter
(behin d scr ee n)
Focusing lens
Detector
Mirror
po sitio ne rs
Laser L ight's
Beam path
Tracking Le ns
(corrective)
Adjustabl e(d etecto r)
mi rror
Fi xed mir ro r
Lens
Probe Tip Holder
Cantilever
The Dimension SPM head scans the tip and generates the cantilever deflection or probe feedback
signal for the different imaging modes. A quad photodetector detects the beam emitted by the laser
diode (1.0 mW max at 670nm) as it reflects off the cantilever. The integrated scanner head consists
of the following subassemblies:
Preamp Board
The preamp board is located inside the Dimension 3100 SPM microscope head. The preamp board
contains a preamplifier circuit for both photodetector signals, a laser diode power supply circuit
that regulates the output of the laser, and ±12 volt regulators for the preamp circuit. The voltage
regulators include current limiting to protect the circuit. The preamp board is in turn connected to a
21-pin male connector cable plugged into the socket on the front of the stage control electronics
box.
Laser Diode Stage
A kinematic tilt stage positions the laser beam on the cantilever. The tilt stage consists of the laser
diode, collimator, focusing lens, base plate, and the X and Y laser diode adjustment knobs. The X
laser diode adjustment knob moves the beam parallel to the major axis of the cantilever substrate.
The Y laser diode adjustment knob moves the beam perpendicular to the major axis of the
cantilever substrate. The adjustment knobs are described in more detail in Chapter 7.
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Dimension 3100 Manual
Rev. D