Leutrek Vision Inc. announced it is a North American distributor of an optical light pipe created for the imaging market by PHLOX SA., of France.   . . .    Microvision Inc. and ViTel Net, a developer of telemedicine solutions, announced they will collaborate on ways to combine ViTel Net's Total Enterprise Telemedicine Solutions (wireless hospital information systems) with Microvision's Nomad Personal Display System.