Cross and Line Optics for LaserLyte-Flex. Interchangeable lens elements which can be used to convert the dot projected by a LaserLyte-Flex Laser into a line, cross or 4x4 grid line. The wider angle optics utilise a moulded multi-rod lens; the 9° cross optic has a DOE (diffractive optical element) lens. The optics are for use with ; 697-3557 697-3557 The following optics are available: ; 127-1548 127-1548