APPARATUS FOR CONTROLLING CENTERING OF LASER LIGHT BEAM OF OPTICAL CONTROL LINE Russian patent published in 2003 - IPC

FIELD: monitoring and measuring technique, particularly apparatuses for controlling centering of laser light beam of optical control line of guiding devices at assembling, aligning and testing them. SUBSTANCE: apparatus includes arranged coaxially and optically coupled one with another first lens, second lens, scattering screen, attenuator of laser irradiation, electronic registering module, third lens. Scattering screen is arranged in rear focal plane of second lens. Third lens is mounted with possibility of introducing it to optical tract between second lens and scattering screen. Attenuator of laser irradiation is placed between scattering screen and electronic registering module and it may be in the form of diaphragm with variable-diameter orifice or in the form of group of changeable diaphragms with different diameter of orifices. First lens may be moved along optical axis to two fixed positions; it has different linear magnification or it may be in the form of pancratic system. EFFECT: lowered size of apparatus, increased accuracy of controlling decentering of laser beam. 5 cl, 2 dwg