G - Physics – 01 – J
Patent
G - Physics
01
J
340/124.5
G01J 1/32 (2006.01) G01S 7/491 (2006.01)
Patent
CA 1298380
- 1 - Abstract of the Disclosure In active range finder apparatus wherein an object to be inspected is illuminated by a laser source and light reflected by the object is detected in an imaging photo- sensor, a system is provided for increasing the dynamic range of the apparatus. This system provides for integrat- ing over each of a series of measuring time periods light reflected from a window of the photosensor and hence proportional to the light received by such photosensor. When such integrated light exceeds a predetermined amount, a saturation signal is generated that immediately de-energises the source. If this amount is not reached by the end of each period, the system is reset. The source is gradually re-energised at the commencement of each subsequent period. The virtually instantaneous de-energisation and gradual re-energisation combined with use of a saturation detector separate from the main photosensor ensures rapid action that is quick enough to substantially avoid saturation of such main photosensor.
580652
Beraldin J. Angelo
Blais Francois
Beraldin J. Angelo
Blais Francois
National Research Council Of Canada
Szereszewski Juliusz M.sc.
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