BBT-Materials Processing Ltd. is a small private technological company dedicated to development and production of high performance mid-IR birefringent optics and Acousto-Optical components for a wide range of applications.
The company is a worldwide leader in crystal growth and processing of high purity Calomel (mercurous chloride) crystals applied in mid-IR optics. The unique properties of this optical material make it a great candidate for manufacturing of different types of components such as polarizers, depolarizers, savart plates, AO cells, birefringent components for interferometry and FTIR spectroscopy, custom substrates, and others applied from VIS to mid-IR spectral region.
Besides IR optics, BBT is also active in the field of Acousto-Optical devices and hyperspectral imaging systems. Thanks to Calomel’s exceptionally high figure of merit M2, the material is suitable for manufacturing of AO units, targeting particularly the MWIR and LWIR region, where no other competitive material is available.
Mercurous chloride monocrystals seems to be also a very promissing material for THz optics (retardation plates, polarizers, etc.) as the material is also transparent in THz spectral region.
As a long-term (since 1969) participant in several different R&D space activities, BBT represents a skilled and experienced partner in the field of primary and applied research in space and microgravity conditions using the unique optical material of Calomel.
TITUS space facility with German astronauts Hans-Dieter Schlegel and Reinhold Ewald
CSK-1C furnace with astronauts Pedro Duque (Spain) and Ulf Merbold (Germany)
CSK-1C space furnace – German astronaut Klaus-Pieter Flade (Project MIR’92, Photo DLR, Germany)
- 2020: Investigation of components for birefringent interferometry and FTIR spectroscopy
- 2019: Commercial versions of Glan-Foucalt and Wollaston polarizers for mid-IR
- 2016: Research project dedicated to study of calomel based AOTF (ESA)
- 2014: First large Calomel crystal grown (35mm diameter)
- 2014: First Calomel infrared polarizer tested (MIR and LWIR region)
- 2012: Calomel qualified for use in space environment (ESA)
- 2008: Beginning of continuous cooperation with ESA in the field of infrared optics and acousto-optics
- 2008: New crystal growth and processing facility installed / Entry of new shareholder (Fastlite-FR)
- 2001-2005: Advanced TITUS – multi-purpose platform – developed for ISS.
- 2001: Termination of MIR (CSK furnace 17 years and TITUS crystallizer 6 years non-stop on board MIR)
- 1995-2001: Material space experiments on board MIR using TITUS crystallizer
- 1995: BBT-Materials Processing Ltd. company was established
- 1992-1995: Material space experiments on board MIR using CSK-1C furnace
- 1991: “Čestmír Barta, BBT – Materials Processing, Crystal Science and Technology institute” established by Čestmír Barta jr.
- 1976-1988: Material space experiments on board Salyut 6 – Sojuz and MIR (within Inst. of Physics, CAS)
- 1969 – Discovery of Calomel as an optical material by Čestmír Barta sen.