OPTICAL DEVICE TO GENERATE LASER QUASIPARALLEL-BEAM RADIATION Russian patent published in 2010 - IPC G02B27/16 

FIELD: physics.

SUBSTANCE: proposed device comprises laser arranged consecutively and aligned with telescopic system comprising lens ring and lens made up of two positive lenses arranged back-to-back. Note here that front focal plate of the first lens is aligned with laser beam constriction while rear focal plane of the second positive lens is aligned with laser beam construction at the beam path center. Telescopic system lens cab be made up of single lens with focal distance: where: f1 is front focal distance, f2 is focal distance equal to half the beam path and working zone L, while lens proper, in both versions, can be replaced in varying path of measurement.

EFFECT: higher accuracy of device operation.

3 cl, 2 dwg