1. Cryogenics Production of miniature cryocoolers Le-tehnika, d.o.o.

2. TERMINOLOGY Cryogenics?
Science and knowledge about natural laws, about material behavior, when the temperature is lower than °C.
We are producing cooling equipment for cooling sensors or other material to temperatures below mentioned level.
Most application in Cryogenics operate at temperature level of LN2 (~-200°C)
Joule Thomson cooler
Open cycle system and operate on principle of compressed gas expansion
Stirling cooler
Based on Stirling thermodynamic process (el. drive), environment friendly

3. APPLICATIONS
Miniature highly efficient cryogenic are used for cooling IR detectors, superconducting materials and other special elements and filters.
Typical applications:
Cameras for night vision (IR)
Missiles with IR head
Special filters in the base stations
Cryosurgery
Typical users:
Defence industry
Police
Control services, security
Scientific labs
Medical equipment
Space applications
Commercial applications

4. IR-seeker coolers in Missiles for
Air Defence
BORDER
Enemy
IR-seeker coolers in Missiles for
Air to Air combats

5. Surveilance , border control

6. Products: Joule Thomson cryocooler
They are used for Defence applications (guided missiles with IR seeker head).
To function: high-compressed and very clean working gas (air, nitrogen, argon and other mixtures) from the pressure vessel or from a compressor is needed
Our production program : 1) self-regulated, 2) actively controlled, 3) fast-cooled down JT coolers. 4) fast-cooled down JT coolers.
All Products are custom made by request of specific needs of the customer.

7. Products: Joule Thomson cryocooler
Actively controlled JT cooler 5,2 L40
Self regulated Joule Thomson cooler 5,18 L50D
Dual Flow Joule Thomson cooler 5,20 L55

8. Products: Stirling cryocooler
Application: Surveillance systems with IR cameras (police, border control, firefighters, millitary) and military vehicles with IR systems
Depending on the cooling power (0,25W; 0,5W; 0,75W) are very small size; lifetime can be over hours
Our program: Rotary Stirling cooler of different sizes

9. Products: Stirling cooler
SRI401
SRI421
SRI474

10. Highlights from our production
Precision sinking and wire erosion
Clean room class ISO7
Clean rooms for assembly Stirling coolers
Installation of cryocoolers
Stirling cooler automatic ESS and acceptance test measurement stand
Reliability testing

11. Markets and customers * Europe: Non - EU:
Deihl BGT Defence GmbH., Germany
Russia
DSO (Singapore)
AIM Infrarot Module GmbH., Germany
DRDO (India)
Bob, China
Sagem Defense Securite (Groupe SAFRAN), France
Mectron (Brasil)
Denel (SA)
Sofradir, France
SCD (Israel)
IR Nova, Sweden
South Korea
Bauer GmbH., Germany
Ultra Electronics Ltd., England
Glenair Ltd., England
Gardner Denver, England
Irtech, Norway