Multi-site infrared thermometer

• US 8,591,103 B2
• Filed: 08/26/2010
• Issued: 11/26/2013
• Est. Priority Date: 11/16/2004
• Status: Active Grant

• Current Assignee: Welch Allyn Incorporated
• Original Assignee: Welch Allyn Incorporated
• Inventors: Lane, John A., Quinn, David E.
• Primary Examiner(s): Jagan, Mirellys
• Application Number:
  US12/869,154
• Publication Number:
  US 20100322282A1
• Time in Patent Office: 1,188 Days
• Field of Search: 374/130, 374/121, 374/126, 374/208, 374/131, 600/474, 600/549
• US Class Current: 374/131
• CPC Class Codes: G01J 5/0022 for sensing the radiation of moving bodies
• CPC Class Codes: G01J 5/0025 Living bodies ear thermometers G01J5/0011; detecting, measuring or recording for diagnostic purposes A61B5/00
• CPC Class Codes: G01J 5/02 Constructional details
• CPC Class Codes: G01J 5/027 making use of sensor-related data, e.g. for identification of sensor parts or optical elements
• CPC Class Codes: G01J 5/04 Casings
• CPC Class Codes: G01J 5/046 Materials; Selection of thermal materials
• CPC Class Codes: G01J 5/049 Casings for tympanic thermometers
• CPC Class Codes: G01J 5/08 Optical arrangements
• CPC Class Codes: G01J 5/0887 Integrating cavities mimicking black bodies, wherein the heat propagation between the black body and the measuring element does not occur within a solid; Use of bodies placed inside the fluid stream for measurement of the temperature of gases; Use of the reemission from a surface, e.g. reflective surface; Emissivity enhancement by multiple reflections
• CPC Class Codes: G01J 5/0893 Arrangements to attach devices to a pyrometer, i.e. attaching an optical interface; Spatial relative arrangement of optical elements, e.g. folded beam path G01J5/049 takes precedence
• CPC Class Codes: G01K 1/18 for reducing thermal inertia
• CPC Class Codes: G01K 13/20 Clinical contact thermometers for use with humans or animals
• CPC Class Codes: G01K 13/25 Protective devices therefor, e.g. sleeves preventing contamination

Abstract

An infrared thermometer includes a probe and an infrared sensor. The probe with an infrared target absorbs thermal radiation to provide a substantially consistent source of infrared radiation and an aperture for preventing contamination of the infrared target while permitting the transmission of thermal radiation to the target. The infrared sensor is configured for sensing infrared radiation from the infrared target. The infrared target is positioned within the probe such that it absorbs thermal radiation that comes from the aperture and thereafter emits thermal radiation to the infrared sensor.

Claims

1. An infrared thermometer comprising:

a probe with an infrared target having an emissivity of at least 0.8 that receives thermal energy via conductance and infrared radiation to provide an indirect and substantially consistent source of infrared radiation, said probe further comprising at least one probe tip body having a distal end, a proximal end, an infrared opaque wall between said distal and proximal ends and a distal aperture for preventing contamination of the infrared target while permitting the reception of thermal energy by the target; and

an infrared sensor for sensing infrared radiation from the infrared target, the infrared target being positioned within one of the distal aperture and the interior of the probe tip body adjacent the distal end and axially relative to said distal aperture wherein said infrared target receives thermal energy passing through the distal aperture and thereafter emits infrared radiation from a planar rear surface of said infrared target to the infrared sensor using the infrared opaque wall of said probe tip body as a waveguide for transmission of said radiation and without intermediate optical elements between said target and said sensor.

2. An infrared thermometer comprising:

a probe with an infrared target that receives thermal energy via conductance and infrared radiation to provide an indirect and substantially consistent source of infrared radiation, said probe further comprising at least one probe tip body having a distal end, a proximal end, an infrared opaque wall and an aperture disposed in relation to said distal end for preventing contamination of the infrared target while permitting the reception of thermal energy by the infrared target; and

an infrared sensor for sensing infrared radiation from the infrared target, the infrared target being positioned within one of the aperture and within the probe tip body adjacent the distal end and axially disposed relative to said distal end such that said infrared target receives thermal energy that passes through the aperture and thereafter emits infrared radiation from a rear planar surface of said target to the infrared sensor using the infrared opaque wall of said probe tip body as a transmissive waveguide and without intermediate optical elements between said target and said sensor.

3. The infrared thermometer as recited in claim 2, wherein the infrared target comprises metal.

4. The infrared thermometer as recited in claim 2, wherein the infrared target comprises a metal foil.

5. The infrared thermometer as recited in claim 2, wherein the infrared target includes a metal selected from the group consisting of aluminum, brass, copper, and gold.

6. The infrared thermometer as recited in claim 2, wherein the aperture is infrared transparent.

7. The infrared thermometer as recited in claim 2, wherein said at least one probe tip body comprises a plurality of different probe tip bodies separably attachable to said probe.

8. The infrared thermometer as recited in claim 7, wherein said plurality of probe tip bodies include a first probe tip body configured for axillary temperature measurement and a second probe tip body configured for at least one of oral and rectal temperature measurement.

9. The infrared thermometer as recited in claim 8, wherein each of said first probe tip body and said second probe tip body are interchangeably attachable to said probe.