Optistat™ liquid cryogen optical cryostats for spectroscopy Which Optistat is right for you? Our easy to use, compact and efficient Optistat cryostats offer a wide range of options to suit most spectroscopy applications. They provide a wide temperature range (from 2 K up to 500 K) while providing excellent optical access. The Optistat model of choice will depend on the base temperature, cooling technology and sample environment required for your experiments. Typical applications: • UV / visible reflectivity & absorption • FTIR spectroscopy • THz spectroscopy P • hotoluminescence • Electroluminescence • Raman scattering • Electrical transport measurements • Photovoltage/current • Ultrafast spectroscopy Temperature range Cooling technology Sample environment Static or dynamic exchange gas Nitrogen only Nitrogen only For microscopy applications, see the guide on

Advantages and trade offs Table 1: Advantages and trade offs of each cooling technology for the Optistat range of cryostats Cryostat type Trade offs Helium continuous flow cryostat • Small size for easy integration into spectrometers • Low base temperature (2.3 K) • Can be used with nitrogen • Continuous use of a helium transfer line and helium dewar OptistatCF OptistatCF-V Nitrogen bath cryostat • Small size for easy integration into spectrometers • Low running cost • No need for external dewar and transfer tube • Limited base temperature (77.2 K) OptistatDN OptistatDN-V Table 2: Advantages...

Full system integration and control System components designed for optimum cryostat performance Sample holder and rod options We offer two types of sample holders. The plain sample holder is used for reflection experiments and the optical one for transmission. For liquid samples, a liquid cuvette sample holder is also available. From left to right, precision height and adjust rotate and standard sample rods. Can be supplied with double sample holder for reference measurements. Intelligent cryogenic environment controller Easy monitoring and control of the sample stage The MercuryiTC controller...

Continuous flow helium cryostat, sample in exchange gas The lowest helium consumption on the market This helium cryostat is ideal for experiments requiring high sample throughput and low conductivity samples. • Wide temperature range: • Versatile: wide range of sample holders/rods including liquid cuvette • Quick sample change in less for liquid samples and simple/precise height adjust/rotate sample rod than 5 minutes via top-loading • Compact size allowing easy sample probe • Superb optical access (f/1) for integration into commercial spectrometers measurements requiring light • Optimised clear...

Continuous flow helium cryostat, sample in vacuum The lowest helium consumption on the market This helium cryostat is well suited for experiments requiring a large sample space and minimum number of windows in the optical beam path (reducing reflective losses). It is also a very versatile instrument as its tail is interchangeable between MicrostatHe and MicrostatHe-R with rectangular tail, ideal for microscopy and magneto-optical Kerr effect applications. • Wide temperature range: from 2.3 K to 500 K • Large sample space enabling studies of sample with a wide range of size and geometry Superb...

Nitrogen bath cryostat, sample in exchange gas Longest hold time on the market This nitrogen cryostat is ideal for experiments which require 77.2 K base temperature, high sample throughput and for samples which are difficult to cool by conduction. Its small footprint is ideal in laboratory where space is limited. It doesn’t require any external dewar or transfer tube. • Wide temperature range: from 77.2 K to 500 K • Optimised clear beam throughput (15 mm diameter aperture) allows a large illumination area • Quick sample change in less than 5 minutes via top-loading sample probe • 15 hours cryogen...

Nitrogen bath cryostat, sample in vacuum Smallest footprint. Large sample space This nitrogen cryostat is ideal for experiments which require 77.2 K base temperature, a large sample space and a minimum number of windows in the optical beam path thus reducing reflective losses. • Wide temperature range: from 77.2 K to 500 K • Large sample space enabling studies of sample with a wide range of size and geometry • 15 hours cryogen hold time before refills required providing the convenience of a full working day operation • Superb optical access (f/1) for measurements requiring light collection •...

Cryogenic spares and accessories Extensive choice of windows to suit your experiment’s needs On the Optistat range of optical cryostats, all windows are demountable and may be exchanged by the customer at a later date for measurements over different Exchangeable windows regions of the optical spectrum. Up to five sets of windows can be provided (four radial; one axial). We can provide ‘wedge’ (non-parallel faces) windows and antireflection coatings, to limit the reflection of windows. The materials selected will be determined by the wavelength and intensity of the radiation and whether beam polarisation...