The pilot, who has not been named, had a beam shone directly into his eyes by a 15-year-old boy as he hunted for two burglars from the air.
The incident happened after police were called to a burglary at the house of the former chancellor Franz Vranitzky in Döbling, a district in the city of Vienna.
Officers were trying to locate the burglars who had broken into a house, and had asked for helicopter assistance to hunt them down.
The intruders had escaped the house and ran away through an allotment.
An officer said: "The crew were blinded by a green light beam and the helicopter had to turn away. The control of the helicopter was only maintained by the use of the autopilot."
The pilot's special helmet allowed him to locate the user of the laser pen and as he flew back to the base, colleagues knocked on the door of the teen and his family.
The boy's father told officers his son had a laser pen and the teen was given a warning for threatening aviation security.
Officers say they have seen an increasing number of laser attacks on a range of services including train drivers and commuters in cars.
It is not known if the burglars were eventually caught.
Story courtesy of Central European News.