US Patent 7108430 Optic fiber terminus indexer

Each optical fiber terminus (20) of a connector has an indexing device (32) that indicates and fixes the rotational position of the terminus in its housing passage (14), the indexing device being in the form of a sleeve that is easily applied when an optimum position is determined. The indexing sleeve is fixed directly to the stripped optic fiber cable (30) at a location immediately rearward of the terminus body (24), so a rear end of the indexing sleeve lies at the rear end of the housing. The indexing sleeve rear end has a radial projection (82) that projects into a slot (84) formed in the rear surface (86) of the connector.