Tethir's history

The company origins

Non-imaging solar concentrators

After 30 years in the field of concentrated solar PV, Tethir’s chief optical scientist Barry Clive saw an opportunity to take his optical inventions out of the solar field for the first time.  He recognised that his area of expertise, non-imaging optics, was under-exploited by other fields including, including Free Space Optics (FSO), LIDAR and sensing. 

Long term collaborators Ralph and Alex Hudson joined forces with Barry in late 2017, adding expertise in engineering and commerce to Barry’s optical science.  The business case that sparked Tethir into life was the need for high speed internet on trains.  Optical communication, with its ultra high speed capacity, offered a solution that would survive 10 years+ of increasing internet demand from rail passengers. 

Detail of the concentrators and solar pa

Free Space Optics

In early 2018, Tethir began working on a new system.  The project, named VILIRI, was backed by Innovate UK and brought a consortium of Tethir, railway telecommunications experts BAS, Northumbria University and Network Rail together.  Barry Clive’s advanced new receiver configuration, offered a wide-field of view capability that hadn’t been seen before in the FSO field and provided the basis for a viable telecommunications network. 

Following this project, Tethir continued to develop FSO receiver optics for other applications including point-to-point FSO links for last-mile internet delivery.  In 2018, Tethir had the opportunity to progress the technology further after winning a place on the Telecommunications Ecosystem Accelerator Centre (TEAC) Wave 2 competition, run by Facebook and BT.