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

TERMINOLOGY Cryogenics? Science and knowledge about natural laws, about material behavior, when the temperature is lower than -150°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

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

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

Surveilance , border control

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.

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

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 10.000 hours Our program: Rotary Stirling cooler of different sizes

Products: Stirling cooler SRI401 (0,5W@80K) SRI421 (0,25W@80K) SRI474 (0,75W@80K)

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

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