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Medical thermometer having an improved optics system

a thermometer and optics system technology, applied in the field of medical thermometers with improved optics systems, can solve the problems of temperature differences and more problems in the second summand, and achieve the effect of reducing the amount of stray radiation

Inactive Publication Date: 2014-05-22
HELEN OF TROY LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes a non-contact IR thermometer that can measure temperature accurately using infrared radiation. It includes an IR radiation sensor, a parabolic mirror, and an aperture. The sensor surface is positioned at or near the focal point of the mirror, and its angle is adjusted to minimize stray radiation. The aperture includes a protective window or filter to prevent certain undesired wavelengths of radiation from passing through. The technical effect of this invention is to provide a more accurate and reliable means of measuring temperature non-contactively.

Problems solved by technology

Practically, these temperatures may differ as the result of, e.g., measurement error or calibration drift.
The second summand can be more problematic, especially due to a generally unknown and unpredictable value of the object's emissivity εb.

Method used

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  • Medical thermometer having an improved optics system
  • Medical thermometer having an improved optics system
  • Medical thermometer having an improved optics system

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Embodiment Construction

[0025]A remote IR thermometer is disclosed that includes, among other things, a parabolic or approximately parabolic mirror and an IR radiation sensor assembly including a filter component and a sensor component. The sensor component includes a surface with a geometric center point on the surface that is positioned in the vicinity of the mirror's focal point. The sensor component may be oriented about the center point at various angles. For the purpose of illustrating principles in accordance with various embodiments of the present invention, several non-limiting examples of the various embodiments are described below. Accordingly, the scope of the invention should be understood to be defined only by the scope of the claims and their equivalents, and not limited by the example embodiments.

[0026]FIG. 1 shows a schematic, cross-sectional view of an embodiment of the mirror 20 and sensor assembly 30 inside a remote IR thermometer 10 having a radiation entrance, e.g., aperture 16 that m...

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Abstract

A medical thermometer including a curved mirror and a radiation sensor is disclosed. The radiation sensor is disposed relative to the mirror in a configuration whereby the mirror reflects away from the sensor radiation that passes through the radiation entrance and that is oriented outside a range of angles relative to the mirror, and reflects toward the sensor radiation that passes through the radiation entrance and that is oriented within a range of angles relative to the mirror.

Description

CROSS-REFERENCES TO RELATED APPLICATIONS[0001]This application claims priority to U.S. provisional application No. 61 / 728,003, filed Nov. 19, 2012, the disclosure of which is incorporated herein by reference in its entirety.FIELD OF THE INVENTION[0002]The present invention relate generally to devices for measuring temperature, and more specifically to non-contact infrared thermometers for medical applications incorporating mirrors to reduce the effects of stray radiation.DESCRIPTION OF RELATED ART[0003]A thermal radiation or infrared (IR) thermometer is a device capable of measuring temperature without physically contacting the object of measurement. Thus, such thermometers are often called “non-contact” or “remote” thermometers. In an IR thermometer, the temperature of an object is taken by detecting an intensity of the IR radiation that is naturally emanated from the object's surface. For objects between about 0° C. and 100° C., this requires the use of IR sensors for detecting ra...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G01J5/08
CPCG01J2005/065G01J5/0831G01J5/0011G01J5/06G01J5/0806G01J5/0808
Inventor YILDIZYAN, ALEKSANGORSICH, JAMES CHRISTOPHER
Owner HELEN OF TROY LIMITED
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