A technique for is presented for locating at least one object illuminated by a laser designator. A detector and an optical unit are provided. The one optical unit is configured for receiving a beam of laser light scattered by the at least one object being illuminated by the laser designator, for creating two secondary beams, and for focusing the two secondary beams to respective foci along an optical axis of the at least one optical unit. The detector is located between the two foci, divided into an even number of portions, and is configured for measuring an intensity of impinging light at each portion. The optical unit is configured for causing the received laser light to impinge the detector, such that an upright image and an inverted image of the scattered laser light beam having substantially equal sizes and substantially equal energies are projected on the detector.