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attoCFM III
low temperature confocal microscope, optimized for transmission measurements
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The attoCFM III is a highly stable, compact cryogenic microscope
optimized for both reflection and transmission measurements. The
attoCFM III confocal microscope is thermally compensated to guarantee
highest stability suitable for spectroscopic measurements over
extended periods of time. The instrument opens up new possibilities
in quantitative sub-micron range investigations and routine inspection
in extreme environments: temperatures down to 0.3 K, magnetic fields
up to 15 T, and high vacuum. The one-of-a-kind combination of materials
allows absolutely stable measurements, even when refilling the
bath cryostat with liquid Helium. The adjustable transmission mode
operation integrated in the instrument is absolutely unique in
the field of low temperature microscopy!
Principle - A laser beam is coupled into the first
arm of a single mode optical fiber coupler. The end of the fiber
connected to the second arm of the fiber coupler is glued into
a ceramic ferrule. The laser light guided through this fiber illuminates
the sample while the single mode fiber itself plays the role of
the blocking pinhole aperture when collecting the scattered reflected
light from the sample. The intensity of this scattered light is
measured by a detector connected to the fourth arm of the fiber
coupler. A second, low-temperature compatible confocal objective
underneath the sample is used for transmission measurements. The
transmitted light collected by the objective is guided to an additional
detector using a separate single mode fiber.
Objective Systems - Three different objectives
are available and an increase of the numerical aperture by a half
ball sapphire lens is possible, thus leading to an increase in
resolution
to
150 - 300 nm (with red laser light illumination).
Request Quotation & Support : |
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Available
Controller for this Product: |
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FPGA-based, fully digital CFM controller
with xy-scan generator |
| ANC350 |
Piezo positioning controller
for attocube's encoded positioners | |
| ANC300 |
Piezo positioning controller
for attocube's open-loop positioners | |
Complete
System Solutions: |
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Complete system
configurations for this product. |
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| Product
Key Features
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optimized for
reflection and transmission experiments |
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miniaturized
microscopy head |
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designed for
highest stability |
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optimized for
minimal light loss |
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large coarse positioning
range at low temperatures |
| Benefits
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fits
standard cryogenic and magnet sample spaces |
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minimized drifts
enable long-term measurements |
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excellent stability
in high magnetic fields |
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highest measurement
sensitivity |
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access to a large
area on the sample surface |
Reflection (top) and transmission (bottom) images of
a Vanadium rhomb-structure on a glass substrate with a
layer
thickness of 50 nm and a periodicity of 5 µm, recorded
with the attoCFM III.
(attocube application labs 2007). |
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