THORLABS OTKB Manual page 18

11. Thread the SM1A10 C-Mount to SM1 adapter onto the Nikon objective.
12. Slide in a 30mm cage assembly XY translating lens mount, HPT1 unto the ER3 rods.
13. Now mount the objective on to the HPT1.
**As a guideline, with the S121C sensor placed about 0.5˝ above objective (see Figure 4.3.3), with diaphragm below
objective fully open, the measured power should be around 6mW or more when driving the provided laser with 100 mA of
current (14 mW at 130 mA drive current).**
SM1D12
Figure 6.3.2: (Left) Vertical bull's-eye alignment of beam using ER8 rods, a lower and upper
iris. (Right) Example alignment optimization through power meter measurements.
6.4 Mounting the Condenser
1. Mount another FM01 hot mirror to a B5C. To ensure that the FM01 is mounted correctly, hold
the FM01 to white light and observe both surfaces. The surface that shows more red reflections
should be mounted such that it reflects the trap beam.
2. Mount the B5C onto a B4C. The FM01 should be mounted such that the mirror face is along the
center of the B4C.
3. Remove the threaded studs from four ER05 cage rods.
4. Place an LCP02 on a flat surface and insert the four ER05 cage rods in the 30 mm cage rod holes
and secure them at such a level that only one of the two set screws in each hole of the LCP02 is
used. This will give you enough rod length to connect to a C6W.
5. Connect a C6W cube to the LCP02 from Step 4. Lock the cube onto the ER05 cage rods after
ensuring that the faces of the C6W and LCP02 are in contact.
6. Attach four ER1 rods to the top of the C6W above and lock cube onto ER1 rods. Make sure that
the ER1 rods don‟t extend into the C6W such that they may interfere with the B4C rotation.
7. Connect another LCP02 to the four ER1 rods as shown in Figure 5.4.1 and lock these using the
set screws on the LCP02.
8. Insert the ensuing assembly from step 2 above on one side of the C6W and coarsely align it so
that the beam is reflected 90˚ to the left (if you look at Figure 6.4.1, reflection will be out of
19590-D04-V15; Apr 12, 2012
S121C
Objective
HPT1
Page 18
Optical Trap Kit
PM100D
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