OPTISTAT

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 to500 K) while providing excellent
optical access.
The Optistat model of choice will
depend on the base temperature,
cooling technology and sample
environment required for yourexperiments.
Typical applications:• UV / visible reflectivity & absorption• FTIR spectroscopy• THz spectroscopy• Photoluminescence• Electroluminescence• Raman scattering• Electrical transport measurements• Photovoltage/current• Ultrafast spectroscopy

Temperature
range

Coolingtechnology

Sampleenvironment

OptistatCF

2.3 – 500 K

Helium or nitrogen

Static or dynamic
exchange gas

OptistatCF-V

2.3 – 500 K

Helium or nitrogen

Vacuum

OptistatDN

77.2 – 500 K

Nitrogen only

Static exchange gas

OptistatDN-V

77.2 – 500 K

Nitrogen only

Vacuum

For microscopy
applications, see
the guide on
our MicrostatTM
products

OPTISTAT

Advantages and trade offs

Table 1: Advantages and trade offs of each cooling technology for the Optistat range of cryostats
Cryostat type

Advantages

Trade offs

ProductHelium 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 heliumtransfer line and helium dewar

OptistatCF
OptistatCF-V

Nitrogen bathcryostat• 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 and trade offs for the different sample environments
Sample spaceenvironment

Advantages

Trade offs

Product

Static exchange gas(circulating cryogen
doesn’t come intothe sample space)• Rapid sample change(via top loading probe)• Homogeneous sample
cooling• No liquid in the opticalbeam path• More optical windows• Larger working distance fromsample to external optics

OptistatCF
OptistatDN

Dynamic exchangegas (circulatingcryogen exiting
the heat exchanger
flows into thesample space)• Rapid sample change(via top loading probe)• Homogeneous sample
cooling ideal for low
conductivity sample• Faster cool down times• Cryostat can be operated
in single shot

• More optical windows• Larger working distance fromsample to external optics• Presence of liquid in the
optical beam path

OptistatCF dynamic option

Vacuum• Fewer windows in the
optical beam path
• Larger sample space• Short working distanceto room temperature• Slower sample change• Potential for temperature
gradient across the sample

OptistatCF-V
OptistatDN-V

Optistat familyTThe Optistat™ system

OPTISTAT

Full system integrationand control
System components
designed for optimum
cryostat performance
Sample holder androd options
We offer two types of sample holders.
The plain sample holder is used forreflection experiments and the opticalone for transmission.
For liquid samples, a liquid cuvettesample holder is also available.
From left to right, precision height andadjust rotate and standard sample rods.
Can be supplied with double sample holder
for reference measurements.

Intelligent cryogenic
environment controller
Easy monitoring and control of thesample stage
The MercuryiTC controller combinesseveral instruments into one allowing
temperature control at the heatexchanger and gas flow control as wellas an extra options for sensor channel
for thermometry measurement directlyat the sample stage. Everything can beaccessed through touch screen front
panel or remotely.

Liquid cuvette, optical andplain sample holders.

For exchange gas cryostats, we can supply sample rods allowing a precise position of your sample.
The simple height adjust and rotate sample rod provides sliding adjustment with locking screws to hold a fixed position.
The range of vertical motion is 32 mm. Positioning accuracy is 0.5 mm (height) and 1o (rotation).
The precision height and adjust rotate sample rod provides height adjust with a resolution of 10 µm and a goniometer for
setting the rotation angle with a resolution of 12 minutes.

Optistat family

HELIUM

OptistatCF

Continuous flow helium
cryostat, sample in exchange gas

The lowest helium
consumption
on the market

This helium cryostat is ideal for experiments requiring highsample throughput and low conductivity samples.

• Wide temperature range:• Versatile: wide range of sample

from 2.3 K to 500 K

holders/rods including liquid cuvette• Quick sample change in lessfor 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• Electrical measurements via 10-pincollection• Optimised clear beam throughput

electrical feed wire to heat exchanger
and/or wired on coax connectors(15 mm diameter aperture)• Can be operated in pull mode (using

allows a large illumination areafor measurements involving thea gas flow pump to pull the helium

detection of low intensity lightfrom a storage dewar to the sample• The most economical use of cryogensspace) or push mode (by pressurisingon the market: less than 0.55 L/h atthe storage dewar)

4.2 K using a Low Loss Transfer tube

For more information please visit:www.oxinst.com/optistatCF

Specifications
Model

Temperature range

Temperature stability

OptistatCF staticused in‘pull’ mode

OptistatCF staticused in‘push’ mode

OptistatCF
dynamic in‘pull’ mode

OptistatCF
dynamic usedin ‘push’ mode

2.3 – 500 K*

4.2 – 500 K*

2.3 – 500 K*
1.6 – 500 K*
in single shot

4.2 – 500 K*± 0.1 K (measured over 10 min period)

Maximum sample space

20 mm diameter

Sample holder dimensions

19 mm wide x 30 mm long (optical sample holder version has a 15 mm aperture)

Cool down from ambient
to 4.2 K (mins)

25

All specifications refer to the base model cryostat with 2 sets of Spectrosil B window used with an LLT transfer tube, EPS 40 (40 m3/hr heliumpumping system) and a MercuryiTC temperature controller. *For 500 K operation, high temperature sapphire inner windows are required.

Optistat family

MSPECTRO

OptistatCF-V

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 numberof windows in the optical beam path (reducing reflective losses). It is also a very
versatile instrument as its tail is interchangeable between MicrostatHe andMicrostatHe-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 sizeand geometry•

Superb optical access (f/0.9)
for measurements requiring• The most economical use of cryogens
on the market: less than 0.45 L/h at

4.2 K using a Low Loss Transfer tube

• No cold windows enabling the use of • Electrical measurements via
any window material above 300 K•

light collection•

Optimised clear beam throughput(23 mm diameter aperture)

10-pin electrical feed wire toDemountable radiation

heat exchanger and/or wired

shield windows to maximiseon coax connectors

transmission intensity•• Compact size allowing easy

Can be operated in pull mode

integration into commercial(using a gas flow pump to pull thespectrometers

allows a large illumination area

helium from a storage dewar tofor measurements involving thethe sample space) or push mode

For more information please visit:

detection of low intensity light(by pressurising the storage dewar)

www.oxinst.com/optistatCFVSpecifications
Model
Temperature range
Temperature stability
Maximum sample space(space within radiation shield)

OptistatCF-V used in ‘pull’ mode

OptistatCF-V used in ‘push’ mode

2.3 – 500 K

4.2 – 500 K± 0.1 K (measured over 10 min period)
30 mm wide x 58 mm long

Sample holder dimensions

20 mm wide x 50 mm long (optical sample holder version has a 12.5 mm aperture)Sample change time (mins)

60

Cool down from ambient
to 4.2 K (mins)

10All specifications refer to the base model cryostat with 2 sets of Spectrosil B window used with an LLT transfer tube, EPS 40 (40 m3/hr heliumpumping system) and a MercuryiTC temperature controller.

Optistat family

NITROGEN

OptistatDN

Nitrogen bath cryostat,sample in exchange gas

Longest hold timeon the market

This nitrogen cryostat is ideal for experiments
which require 77.2 K base temperature, highsample 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:• Optimised clear beam throughput• Quick sample change in lessallows a large illumination areafrom 77.2 K to 500 K

than 5 minutes via top-loading
sample probe• 15 hours cryogen hold time before
refills required providing theconvenience of a full working
day operation• Superb optical access (f/1)

for measurements requiring
light collection• Electrical measurements via 10-pin

electrical feed wire to heat exchanger
and/or wired on coax connectors(15 mm diameter aperture)

for measurements involving thedetection of low intensity light• Versatile: wide range of sample

holders/rods including liquid cuvettefor liquid samples and simple/precise
height adjust/rotate sample rods

• Compact size allowing easy

integration into commercial
spectrometers
For more information please visit:www.oxinst.com/optistatDN

Specifications
Temperature range

77.2 – 500 K*

Temperature stability± 0.1 K (measured over 10 min period)

Maximum sample space

20 mm diameter

Sample holder dimensions

19 mm wide x 30 mm long
(optical sample holder version has a 15 mm aperture)

Cool down from ambient to 77 K (mins)

20

Liquid nitrogen capacity

1.2 L

Hold time at 77 K
*For 500 K operation, high temperature sapphire inner windows are required.

Optistat family≥ 15 hours

NNITROGEN

OptistatDN-V

Nitrogen bath cryostat,sample in vacuum

Smallest footprint.
Large sample space

This nitrogen cryostat is ideal for experiments which require 77.2 K basetemperature, 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 sizeand geometry• 15 hours cryogen hold time before
refills required providing theconvenience of a full workingday operation• Superb optical access (f/1)

for measurements requiring
light collection• Electrical measurements via• Optimised clear beam throughput(35 mm diameter aperture)

allows a large illumination area
for measurements involving thedetection of low intensity light• No cold windows enabling the useof any window material above 300 K• Compact size allowing easy

integration into commercial
spectrometers

For more information please visit:www.oxinst.com/optistatDN-V

10-pin electrical feed wire toheat exchanger and/or wired
on coax connectors

Specifications
Temperature range

77.2 – 500 K

Temperature stability± 0.1 K (measured over 10 min period)

Maximum sample space

20 mm diameter

Sample holder dimensions

20 mm wide x 50 mm long

Sample change time (mins)

60

Cool down from ambient to 77 K (mins)

20

Liquid nitrogen capacity

1.2 L

Hold time at 77 K

≥ 15 hours

Optistat family

SPECTRO

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 andmay be exchanged by the customer at a later date for measurements over different

Exchangeablewindows

regions of the optical spectrum. Up to five sets of windows can be provided (fourradial; 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 is required.
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Visit www.oxinst.com/optistat or email to nanoscience@oxinst.com
This publication is the copyright of Oxford Instruments Nanotechnology Tools Ltd and provides outline information only, which (unlessagreed by the company in writing) may not be used, applied or reproduced for any purpose or form part of any order or contract orregarded as the representation relating to the products or services concerned. Oxford Instruments’ policy is one of continued improvement.
The company reserves the right to alter, without notice the specification, design or conditions of supply of any product or service.
Oxford Instruments acknowledges all trademarks and registrations. © Oxford Instruments Nanotechnology Tools Ltd, 2017.
All rights reserved.

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