free-beam/fiber-based confocal microscope for transmission
combination of attoCFM I and attoCFM III
transmission via 1 free-beam & 1 fiber-based channel
unmatched long-term drift stability
measure single photon signals over extended periods
independent position both objectives in xyz
pump-probe @ large lateral separation (up to 3 mm)
Transmission experiments in confocal microscopy sometimes also require filtering and shaping of the optical beam, and hence free-beam access instead of purely fiber-based can have quite some advantages in terms of flexibility.
This instrument literally consists of a ‚conventional‘ attoCFM I, which has a free-beam based channel with any of our apochromatic objectives above the sample, and a fiber-based channel from below just like in the attoCFM III. So, despite fitting into any of our toploading cryostats, which usually features only 1 top and no side or bottom windows, this setup allows for at least either the excitation or the detection to be free-beam.
This provides the user with all the flexibility of the external optics head just like in case of the attoCFM I for one channel (plus potential reflection measurements).
At the same time, there are 3 degrees of freedom for the sample (xy translation under the fixed LT-APO objective as well as focussing), and another 3 degrees of freedom in xyz to position the fiber-based objective underneath the sample. All positioners are usually equipped with a /RES encoder for closed loop control, and there is an additional scanner for the sample in xy direction. For more info please refer to the fundamentals section.
No SpecSheet available