Optistat^®DN-V liquid nitrogen (LN2) optical spectroscopy cryostat
Sample in vacuum

Optistat®DN-V liquid nitrogen (LN2) optical spectroscopy cryostat

The OptistatDN-V enables optical spectroscopy experiments that require:

• Base temperatures down to 77 K
• Sample in vacuum mounted directly on the heat exchanger; sample change still takes only 1 hour
• Hold time greater than 15 hours at 77 K, allowing a full working day's experiments to be run without refilling
• Generous f1 radial optical access, with 4 radial windows and 1 axial window
• A minimum number of windows in the optical path to maximise transmission
• Maximum window flexibility - all windows are at room temperature and easy to change
• A compact and low-cost cryostat

• Particularly suitable for low temperature absorption, flourescence and photoluminescence spectroscopy

Operation

The OptistatDN-V is very easy to use. A liquid nitrogen reservoir surrounds the upper part of the central sample tube and supplies liquid nitrogen via a capillary tube to a heat-exchanger. During operation, the gravity fed flow of liquid is controlled by a valve in the exhaust line, on the cryostat top plate.

In a vacuum system, the sample space is evacuated and the sample holder located directly on the heat exchanger. Effective sample cooling is achieved due to good thermal contact between the sample holder and the heat exchanger. To change the sample, the cryostat is warmed to room temperature, the vacuum released and the outer case removed.