Patent ID: 8400637
Filing Date: 2013-03-19
Classification: G01J,G01N

Abstract:
1. An apparatus for downhole analysis of samples in a wellbore, the apparatus comprising: an illumination source that illuminates at least a portion of a sample with light at an inspection point; a first and second light sensitive detector, the detectors producing output signals based on light received from the illuminated sample portion, the received light carrying information about the sample portion; a reference light that is produced by directing at least a portion of the light from the illumination source toward the first and second light sensitive detectors; and a temperature sensor in proximity to the first and second light sensitive detectors, the temperature sensor producing an output signal based on temperature, the output signals produced by the first and second detectors being compensated by the temperature output signal, wherein the compensated output signals produced by the first and second light sensitive detectors is analyzed to determine temperature compensated illuminated sample portion information.