Patent ID: 7646192

Claim:
An electric current measurement device, comprising: a housing defining a first open end and a second open end opposite said first open end; a first sealing element mounted in said first open end of said housing and having an aperture configured for receiving a first optical fibre; a first fixture element configured for fixing said first optical fibre in said housing; a first optical lens holder mounted in said housing, said first optical lens holder being configured for holding a first optical lens in said housing and having a first reception part configured for receiving said first fixture element for mounting said first optical fibre in optical continuation with said first optical lens; a first polarization filter mounted in said housing in optical continuation with said first optical lens; a glass rod received in and encapsulated within said housing in optical continuation with said first polarization filter, said glass rod being constructed from a material having magneto-optical properties; a second polarization filter mounted in said housing in optical continuation with said glass rod; a second optical lens holder mounted in said housing, said second optical lens holder being configured for holding a second optical lens in said housing in optical continuation with said second polarization filter, said second optical lens holder having a second reception part; a second fixture element configured for fixing a second optical fibre in said housing, said second fixture element being received in said second reception part of said second optical lens holder; a second sealing element mounted in said second end of said housing, said second sealing element having an aperture configured for receiving said second optical fibre; and first and second lids removably attachable to said first and second ends, respectively, of said housing, said first and second lids including an aperture configured for receiving said first and second optical fibres, respectively.