Picotronic class 2 blue dot laser module adjustable focus picotronic 70115505 a class 2 laser module that emits a blue dot beam and has adjustable focus the module has an aluminium body that contains the electronics and the anti reflective coated glass protective lens allowing the module to be operated in dusty and harsh environments the blue laser makes this module suitable for applications such as environmental monitoring medical diagnostics projectors and displays magnetic levitation