Patent ID: 8835855
Filing Date: 2014-09-16
Classification: G01J,G01V,G02B,G08B

Abstract:
1. A sighting device for use in a security sensor system for adjusting a direction of transmission of detecting wave transmitter and/or a direction of receipt of a detecting wave receiver, which device comprises: an eyepiece lens provided with a microlens; an objective lens provided with a first marker encompassed within a field of view of the eyepiece lens; and a reflecting mirror disposed on an optical path extending between the eyepiece lens and the objective lens; wherein the first marker is comprised of a circular contour line or a polygonal contour line and is so configured that when a viewing axis offsets from a tolerance, a virtual image of the first marker magnified by the microlens is viewed with a part thereof dropped out having been offset from the field of view of the microlens.