Abstract: A forehead thermometer includes: a main body having a probe formed on a front portion of the main body, a thermal-mass sleeve concentrically formed in a central hole of the probe, a Fresnel lens formed on a front end portion of the probe for focusing an incoming infrared temperature signal as emitted from the temperature sensing area on a patient's forehead to an infrared sensor secured to a bottom portion of the sleeve, an electronic circuit connected with the sensor and secured in the main body, and a lamp connected to the circuit and formed in the main body juxtapositioned to the sensor for projecting light forwardly to be parallel to a longitudinal axis of the Fresnel lens and the sensor for optically aiming a reference target area approximating the temperature sensing area for quickly locating the temperature sensing area for hygienically measuring a patient's body temperature.

Abstract: An infrared thermometer includes: a thermal-mass sleeve concentrically mounted in a probe of the thermometer main body having a flat front rim of the probe, an infrared sensor thermally conductively secured to a bottom portion of the thermal-mass sleeve and connected to a printed circuit board fixed in the main body, and a disposable hygienic cap covering the probe, with the thermal-mass sleeve defining a conical hole tapered inwardly from an outer larger opening of the sleeve towards the bottom portion of the sleeve for passing the infrared radiation waves from a larger target surface of a patient's forehead artery sensing area, whereby the flat front rim of the probe will be planarly rested upon the patient's forehead surface for a comfortable reliable body-temperature measurement.

Abstract: A hygienic protecting device for an electronic thermometer includes: a disposable wrapping film wrapped on a front housing portion of an infrared thermometer, a fastening cup member made with a truncated cone shape and disposed about the disposable film on the front housing portion of the thermometer having a probe, the fastening cup member being mounted within the front housing portion for fastening the disposable film on the front housing portion and for preventing contamination when inserting the front housing portion and the probe into a person's ear canal, and a dust-proof thin film wrapped on the probe for shielding the probe for preventing contamination of the probe, with a fastening ring fastening the dust-proof thin film on the probe and a circular contacting ring disposed about the dust-proof thin film and retained between the dust-proof thin film on the probe and an inside wall in the front housing portion within an air space annularly defined between the probe and the front housing portion for min