Infrared thermometer

• US 6,109,782 A
• Filed: 06/26/1998
• Issued: 08/29/2000
• Est. Priority Date: 12/28/1995
• Status: Expired due to Term

• Current Assignee: Omron Healthcare Company Limited (Omron Corporation)
• Original Assignee: Omron Corporation
• Inventors: Nakagawa, Akira, Fukura, Masashi, Makita, Shigeru, Yamauchi, Takanobu
• Primary Examiner(s): Bennett, G. Bradley
• Assistant Examiner(s): VERBITSKY, GAIL KAPLAN
• Application Number:
  US09/091,955
• Time in Patent Office: 795 Days
• Field of Search: 374/131, 374/130, 374/209, 374/208
• US Class Current: 374/131
• CPC Class Codes: G01J 5/04 Casings
• CPC Class Codes: G01J 5/049 Casings for tympanic thermometers
• CPC Class Codes: G01J 5/06 Arrangements for eliminating effects of disturbing radiation; Arrangements for compensating changes in sensitivity for adjusting of solid angle of collected radiation G01J5/07; means for wavelength selection G01J5/0801
• CPC Class Codes: G01J 5/064 Ambient temperature sensor; Housing temperature sensor; Constructional details thereof
• CPC Class Codes: G01J 5/08 Optical arrangements
• CPC Class Codes: G01J 5/0818 Waveguides
• CPC Class Codes: G01J 5/70 Passive compensation of pyrometer measurements, e.g. using ambient temperature sensing or sensing of temperature within housing

Abstract

An infrared thermometer such that the measurand includes no error which may be caused due to the transmission of the heat from an object (especially, an external auditory canal), into which a probe is inserted to the probe, to a waveguide and an infrared sensor. In a temperature detecting section where an infrared sensor (40), a waveguide (60) and a temperature sensor (68) are provided in a probe (20), a second thermally conductive tube (34) is so provided between the probe (20) and the waveguide (60) as to be heat insulated from the waveguide (60) and the infrared sensor (40). Thus, the heat from the probe (20) is not transmitted to the waveguide (60) and the infrared sensor (40).

Claims

1. An infrared thermometer, comprising:

a waveguide guiding infrared rays to an infrared sensor inside a probe formed as the projected tip end portion of a casing main body of the infrared thermometer; and

a heat-conductive tube provided between said probe and said waveguide, diffusing the heat from the probe and being thermally insulated from the waveguide and the infrared sensor.

2. An infrared thermometer according to claim 1, wherein said probe and said heat conductor are in contact with each other in at least one part.

3. An infrared thermometer according to claim 1, wherein said heat conductive tube comprises a heat-releasing portion.