Optical Trap Kit
19590-D04-V15; Apr 12, 2012
Page 16
www.thorlabs.com
17.
Mount the FM01 hot mirror into 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.
18.
Mount the B5C onto a B4C. The B5C should be mounted such that the hot mirror is positioned at
the center of the B4C.
19.
Insert the B4C into the top of the C6W and coarsely align it so that the beam is reflected 90˚ to
the left. If the B5C is mounted at the appropriate hole on the B4C, and the coarse adjustment is
correct, the kinematic adjusters on the B4C should be aligned along the diagonal of the C6W as
shown in Figure 6.2.2. Use the four screws that came with the B4C to connect it to the C6W such
that it can still rotate on top of it.
20.
Temporarily attach two ER6 (or longer) cage rods to the left side of the C6W and place the cage
system VRC4CPT alignment guide on the rods.
21.
Adjust the B4C so that the reflected beam is aligned to the center of the cage system. Do this in
two steps. First thread in an iris, SM1D12D to this left end port of the C6W. Then rotate the B4C
on the C6W until the beam is going through the iris when it is almost closed, and through the
center hole of the VRC4CPT. Then use the kinematic adjusters if necessary on the B4C to
optimize the alignment and ensure that you have the maximum possible intensity going through
both pinholes. Remove the ER6 cage rods and SM1D12D.
22.
Attach an SM1L10 to the previously adjusted KCB1 from step 12 in section 6.1
23.
Remove the studs at the ends of the four ER1.5 rods and attach the other ends to the KCB1.
24.
Connect four ER3 rods to the upper face of the KCB1. Remove the retaining rings in all the
LCP02s and LCP01s. Slide an LCP02 into these ER3 rods and tighten the set screws once the
faces of the KCB1 and LCP02 are in contact as shown in Figure 6.2.2 (right). Note that the 4
ER03 rods will slide though LCP02 when the set screws have been slightly released.
25.
Mount the imaging lens, AC254-200-A into an SM1L05 and connect to the side port of the C6W
as shown in Figure 6.2.2. The lens should be mounted such that the concave side is directed to
camera.
SM1L10
LCP02
ER1.5
Figure 6.2.2: (Left) Assembly between the cage cube and the KCB1 for the vertical
segment. (Right) ER3 cage rods and LCP02 for vertical segment.
ER1 rods to
connect to LCP01
Imaging
Lens
