Radiant thermometer with aiming system
AssigneeHoriba, Ltd.
InventorsToshiyuki Nomura, Naohiro Osuga, Yuiji Tsujioka, Naoyuki Matsumoto
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Abstract
A radiant thermometer for detecting infrared rays coming from an object along an optical axis to determine its temperature is provided with an improved aiming system. An exterior housing supports an interior housing that mounts the detector having an opening for receiving the infrared rays. A visible sighting light source is provided in the exterior housing behind the detector. A peripheral lens system is mounted between the interior and the exterior housing to provide a cone shaped transmission of light having a larger field angle than a field angle of the detector. The cone shaped transmission of light is capable of being focused on the optical axis for aiming the radiant thermometer.
Claims16
An improved radiant thermometer having a detector on an optical axis for measuring infrared rays from an object to determine its temperature comprising:
- a housing for supporting the detector having an opening for receiving the infrared rays;
- means for focusing the infrared rays onto the detector from a measurement point on the object;
- a visible sighting light source for providing an aiming light, and
- means for directing the sighting light from a position off axis of the detector optical axis to merge to a focus position on the optical axis, including a peripheral ring lens substantially surrounding the detector housing to provide a cone-shaped transmission of light having a larger field angle than a field angle of the detector, the cone-shaped transmission of light being focused to a point coincident with the measurement point whereby sighting of the radiant thermometer can be accomplished without blocking infrared rays to the detector.
An improved radiant thermometer having a detector on an optical axis for measuring infrared rays from an object to determine its temperature comprising:
- an exterior housing having an opening at a front end to receive infrared rays;
- an interior housing for supporting the detector having an opening for receiving the infrared rays, the interior housing being conventionally positioned in the exterior housing adjacent the front end;
- means for focusing the infrared rays on the detector from a point on the object mounted in the opening of the interior housing;
- a visible sighting light source for providing an aiming light positioned within the exterior housing adjacent a rear end of the exterior housing, and
- means, between the interior housing and the exterior housing, for directing the sighting light from a position off axis of the detector optical axis to form a cone-shaped transmission of light having a larger field angle than a field angle of the detector which can merge to a focus position on the optical axis, coincident with the object point to be measured whereby sighting of the radiant thermometer can be accomplished without blocking infrared rays to the detector.
Dependencies are inferred from the claim text.