the fiber 6702 to the next stage a nut 6704 connected to ferrule 6703 facilitates the connection of ferrule 6703 to other connections the fiber 6702 is finished at end of ferrule 6705 then there is a housing 2706 with an opening 2707 at proximal end and another opening 2708 at distal end there is a precision spacer 2709 an optical lens 2710 and another precision spacer 2711 inside housing 2706 the housing 6706 is identical to housing 6007 described in fig6 b a coupler 6713 is provided for further light transportation the coupler 6713 with opening 6712 at proximal end opening 6714 at distal end while housing 6706 is inserted within coupler 6713 at proximal end 6712 a housing 6715 is likewise inserted into coupler distal end 6714 the structure inside housing 6715 mirrors the structure in housing 6706 in that it contains a precision spacer 2718 an optical lens 2719 and another precision spacer 2720 inside housing 6715 housing 6715 also presents proximal opening 6716 and distal opening 6717 distal opening 6717 receives a ferrule 6722 containing fiber 6721 which is finished at the end of ferrule 6724 ferrule 6722 likewise is attached to a nut 6723 to facilitate connection this is the first part of connection fiber 6721 which has an identical structure at its other end specifically there is a ferrule 6725 to make fiber to connect to next stage a nut 6726 is attached to ferrule 6725 and a fiber finish surface 6727 at end of ferrule 6725 another housing 6728 with opening 6729 at.