Patent ID: 9165443
Filing Date: 2015-10-20
Classification: G08B

Abstract:
1. A detector, comprising: a housing with at least one window for allowing radiation to enter; at least one sensor in said housing for sensing entered radiation; a unit in said housing for processing sensor signals; and mirrors being shaped and mounted in said housing for reflecting radiation from outside detection zones better than radiation from elsewhere, onto said at least one sensor; said mirrors including linked mirrors reflecting radiation from a detection zone consecutively and at least two mirrors being themselves linked to a common mirror; each of said mirrors in said at least one linked pair is shaped and mounted in said housing so as to prevent it from reflecting radiation from their detection zone in sequence with other mirrors onto said at least one sensor; each of said mirrors in at least one pair of linked mirrors being shaped and mounted in said housing so as to prevent it from reflecting radiation from another detection zone in sequence with other mirrors onto said at least one sensor; and one of said mirrors in said at least one linked pair being concave and the other of said mirrors in said at least one linked pair being substantially flat.