Patent ID: 8969822
Filing Date: 2015-03-03
Classification: G01D,G01J,G01S

Abstract:
1. A method of estimating the direction of a radiation source positioned in a sensing region, the method comprising: providing a two-dimensional radiation sensor, the radiation sensor comprising: receiving a first intensity signal from the first linear array sensor, wherein the first intensity signal includes first intensity values corresponding to radiation incident on the first sensor elements through the first aperture; receiving a second intensity signal from the second linear array sensor, wherein the second intensity signal includes second intensity values corresponding to radiation incident on the second sensor elements through the second aperture; and determining the direction based on the first and second intensity signals, wherein: the first radiation intensity signal includes a first range of high intensity values corresponding to a range of first sensor elements exceeding a first threshold value; and the second radiation intensity signal includes a second range of high intensity values corresponding to a range of second sensor elements exceeding a second threshold value; and wherein determining the direction includes: selecting a first center sensor element based on the first range of high intensity values in the first radiation intensity signal; selecting a second center sensor element based on the second range of high intensity values in the second radiation intensity signal; and determining a direction based on the first and second center sensor element.