Abstract:
A fixing device includes a fixing rotator and a pressure rotator contacting the fixing rotator to form a fixing nip therebetween, through which recording media of a plurality of sizes are conveyed. The recording media create a plurality of non-conveyance spans on a lateral end of the fixing rotator in an axial direction thereof where the recording media are not conveyed. A heater is disposed opposite the fixing rotator to heat the fixing rotator. A multi-view thermopile array is disposed opposite an outer circumferential surface of the lateral end of the fixing rotator in the axial direction thereof and angled relative to the fixing rotator to detect a temperature of the fixing rotator. The thermopile array includes an inboard temperature detection element directed to a conveyance span on the fixing rotator where the recording medium of a decreased size is conveyed.
Abstract:
A thermoelectric infrared detector. The detector has an absorption platform comprising a material that increases in temperature in response to incident infrared radiation and the platform covering substantially an entire area of the detector. The detector includes a thermocouple substantially suspended from contact with a substrate by at least one arm connected to the substrate.
Abstract:
The isothermal radiometric system improved is of the double junction variety (preferably copper-constantan-copper) and includes a black body housing (B1) defining a central concavity. The central concavity has a black body disk (D1) at the bottom thereof. The disk is preferably suspended by a copper (14) and a constantan (16) wire with one junction (32) formed on the surface of the disk and the other junction (34) formed on the surface of the housing. The improvement includes a plurality of and preferably three annular baffles (50, 52, 54) defining central, circular and preferably concentric opening. These baffles are lodged in the opening (30) of the housing above the mounted radiometer disk (D1). The annular baffles on the side towards the radiation source are coated as a black body so as to increase the thermal coupling of the black body housing to the ambient being radiometrically observed. The baffles on the side away from the radiation source and exposed to the radiometer disk are reflectively coated to decrease further any couple between the radiometer disk and the black body housing. The combination of the baffles and the disk combine to give the radiometer a small field of view which permits radiometric thermal measurement of a small solid angle and ignores the remainder of the environment. Preferred use of the radiometer in looking at a centrifuge rotor (R1) is disclosed.
Abstract:
A method of and apparatus for measuring thermal irradiation. The apparatus, in the form of a thermal radiometer, comprises a housing, a shutter mounted on a wall of the housing, a thermally conductive element positioned behind the shutter, the conductive element having a black surface facing the shutter, and means for measuring the temperature of the conductive element. The outer face of the shutter will be thermally reflective, and the radiometer will include means for calculating the rate of temperature rise of the conductive element after opening the shutter and an indica- to responsive to the calculating means for displaying a value which is proportional to the rate ot temperature rise The method for measuring thermal irradiation comprises positioning a thermallv conductive element having a black surface behind a shutter with the black surface facing the shutter. allowing the element to assume ambient temperature opening the shutter anc measuring the subsequent rate of temperature rise of the element and using the rate of temperature rise to determine the level of irradiation.
Abstract:
A thermoelectric infrared detector. The detector includes an absorption platform comprising a material that increases in temperature in response to incident infrared radiation, the platform covering substantially an entire area of the detector. The detector includes a thermocouple substantially suspended from contact with a substrate by at least one arm connected to the substrate and a thermal connection between the absorption platform and the thermocouple.
Abstract:
Apparatus (110) for determining the quantity of an incident flux of electromagnetic radiation comprising first and second bodies (118, 120) having different coefficients of interaction with the incident radiation, means to monitor the temperatures of said bodies (118, 120), heating means associated with at least one of said bodies (118, 120), control means (114) responsive to the monitored temperatures to control said heating means so as to minimise temperature differences therebetween and to provide a signal representative of the power delivered to the heating means and computing means (114) responsive to said power signal to compute a value for the quantity of the flux of electromagnetic radiation incident upon the bodies (118, 120). Method of determining the quantity of an incident flux of electromagnetic radiation providing first and second bodies (118, 120) having different coefficients of interaction with the incident radiation, exposing said bodies to the incident flux of electromagnetic radiation, measuring their temperatures, heating the colder of said two bodies (118, 120) so as to minimise any temperature difference therebetween, measuring the quantity of power necessary to so heat the colder of said two bodies, and calculating a value for the quantity of the flux of electromagnetic radiation incident upon the bodies (118, 120) on the basis of said measured values.
Abstract:
Le système radiométrique isothermique amélioré est du type à double jonction (de préférence cuivre-constantan-cuivre) et comprend un logement d'un corps noir (B1) définissant une concavité centrale. La concavité centrale possède un disque du corps noir (D1) au fond de la concavité. De préférence, le disque est suspendu par un fil de cuivre (14) et de constantan (16) avec une jonction (32) formée sur la surface du disque et l'autre jonction (34) formée sur la surface du logement. L'amélioration consiste en une pluralité de chicanes annulaires, de préférence trois chicanes annulaires (50, 52, 54) définissant une ouverture centrale, circulaire et de préférence concentrique. Ces chicanes sont logées dans l'ouverture (30) du logement au-dessus du disque radiométrique (D1). Les chicanes annulaires, sur le côté dirigé vers la source de rayonnement, sont revêtues comme un corps noir de manière à augmenter le couplage thermique du logement du corps noir avec l'environnement observé par radiométrie. Les chicanes, en éloignement par rapport à la source de rayonnement et exposées au disque radiométriques, sont revêtues de manière réfléchissante pour diminuer davantage tout couple entre le disque radiométrique et le logement du corps noir. La combinaison des chicanes et du disque donne au radiomètre un petit champ de vision qui permet la mesure thermique radiométrique d'un petit angle plein et ignore le reste de l'environnement. Une utilisation préférée du radiomètre sur un rotor (R1) d'une centrifugeuse est décrite.
Abstract:
A method of and apparatus for measuring thermal irradiation. The apparatus, in the form of a thermal radiometer, comprises a housing, a shutter mounted on a wall of the housing, a thermally conductive element positioned behind the shutter, the conductive element having a black surface facing the shutter, and means for measuring the temperature of the conductive element. The outer face of the shutter will be thermally reflective, and the radiometer will include means for calculating the rate of temperature rise of the conductive element after opening the shutter and an indica- to responsive to the calculating means for displaying a value which is proportional to the rate ot temperature rise The method for measuring thermal irradiation comprises positioning a thermallv conductive element having a black surface behind a shutter with the black surface facing the shutter. allowing the element to assume ambient temperature opening the shutter anc measuring the subsequent rate of temperature rise of the element and using the rate of temperature rise to determine the level of irradiation.
Abstract:
본 발명은 한 쌍의 열전대와 금속박판을 포함하는 실시간 광출력 측정 장치 및 그것의 동작 방법에 관한 발명이다. 본 발명의 일 실시예에 따른 광출력 측정 장치는 제1 금속선, 제2 금속선을 포함하는 제1 열전대 및 제1 금속박판을 포함하는 제1 센서; 제3 금속선, 제4 금속선을 포함하는 제2 열전대 및 제2 금속박판을 포함하는 제2 센서; 및 상기 제1 센서와 제2 센서에서 측정된 온도들의 온도차를 계산하여 상기 제1 센서와 제2 센서에 광을 조사하는 광원의 광출력 및 표면 온도를 산출하는 제어부를 포함할 수 있다.