EXTERNAL MODULATION TYPE THERMAL OBJECT SENSOR
PURPOSE:To detect even a low temperature heated object accurately by connecting a modulation section having a Faraday element to a point wih an appropriate environmental condition in the intermediate section of an optical fiber for transmitting infrared rays radiated from the heated object. CONSTITU...
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| creator | OOHATA YUTAKA |
| description | PURPOSE:To detect even a low temperature heated object accurately by connecting a modulation section having a Faraday element to a point wih an appropriate environmental condition in the intermediate section of an optical fiber for transmitting infrared rays radiated from the heated object. CONSTITUTION:Infrared rays from a thermal object 1 enter a polarizer plate 6a through an optical fiber 3a of a low loss. When the light converted into a linearly polarized light with the polarizer plate 6a passes through a Faraday element 7, it generates a Faraday rotation under the influence of an AC magnetic field due to alternating current flowing through a coil 8. The angle of rotation is received with a polarizer plate 6b set in the direction of polarization axis at 45 deg. to the polarizer plate 6a and the quantity of light proportional to the angle of Faraday is outputted to an optical fiber 3b. This AC optical signal is received with a light receiving element 5 and after a photoelectric conversion, it is AC amplified and converted into DC to be displayed. |
| format | Patent |
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CONSTITUTION:Infrared rays from a thermal object 1 enter a polarizer plate 6a through an optical fiber 3a of a low loss. When the light converted into a linearly polarized light with the polarizer plate 6a passes through a Faraday element 7, it generates a Faraday rotation under the influence of an AC magnetic field due to alternating current flowing through a coil 8. The angle of rotation is received with a polarizer plate 6b set in the direction of polarization axis at 45 deg. to the polarizer plate 6a and the quantity of light proportional to the angle of Faraday is outputted to an optical fiber 3b. This AC optical signal is received with a light receiving element 5 and after a photoelectric conversion, it is AC amplified and converted into DC to be displayed.</description><language>eng</language><subject>COLORIMETRY ; DETECTING MASSES OR OBJECTS ; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING ; FREQUENCY-CHANGING ; GEOPHYSICS ; GRAVITATIONAL MEASUREMENTS ; MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT ; MEASURING ; NON-LINEAR OPTICS ; OPTICAL ANALOGUE/DIGITAL CONVERTERS ; OPTICAL LOGIC ELEMENTS ; OPTICS ; PHYSICS ; RADIATION PYROMETRY ; SIGNALLING ; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF ; TESTING ; TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILARSIGNALS</subject><creationdate>1984</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19840123&DB=EPODOC&CC=JP&NR=S5912378A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25555,76308</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19840123&DB=EPODOC&CC=JP&NR=S5912378A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>OOHATA YUTAKA</creatorcontrib><title>EXTERNAL MODULATION TYPE THERMAL OBJECT SENSOR</title><description>PURPOSE:To detect even a low temperature heated object accurately by connecting a modulation section having a Faraday element to a point wih an appropriate environmental condition in the intermediate section of an optical fiber for transmitting infrared rays radiated from the heated object. CONSTITUTION:Infrared rays from a thermal object 1 enter a polarizer plate 6a through an optical fiber 3a of a low loss. When the light converted into a linearly polarized light with the polarizer plate 6a passes through a Faraday element 7, it generates a Faraday rotation under the influence of an AC magnetic field due to alternating current flowing through a coil 8. The angle of rotation is received with a polarizer plate 6b set in the direction of polarization axis at 45 deg. to the polarizer plate 6a and the quantity of light proportional to the angle of Faraday is outputted to an optical fiber 3b. This AC optical signal is received with a light receiving element 5 and after a photoelectric conversion, it is AC amplified and converted into DC to be displayed.</description><subject>COLORIMETRY</subject><subject>DETECTING MASSES OR OBJECTS</subject><subject>DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING</subject><subject>FREQUENCY-CHANGING</subject><subject>GEOPHYSICS</subject><subject>GRAVITATIONAL MEASUREMENTS</subject><subject>MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT</subject><subject>MEASURING</subject><subject>NON-LINEAR OPTICS</subject><subject>OPTICAL ANALOGUE/DIGITAL CONVERTERS</subject><subject>OPTICAL LOGIC ELEMENTS</subject><subject>OPTICS</subject><subject>PHYSICS</subject><subject>RADIATION PYROMETRY</subject><subject>SIGNALLING</subject><subject>TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF</subject><subject>TESTING</subject><subject>TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILARSIGNALS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1984</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZNBzjQhxDfJz9FHw9XcJ9XEM8fT3UwiJDHBVCPFwDfIFivs7ebk6hygEu_oF-wfxMLCmJeYUp_JCaW4GBTfXEGcP3dSC_PjU4oLE5NS81JJ4r4BgU0tDI2NzC0djIpQAAL_OJfA</recordid><startdate>19840123</startdate><enddate>19840123</enddate><creator>OOHATA YUTAKA</creator><scope>EVB</scope></search><sort><creationdate>19840123</creationdate><title>EXTERNAL MODULATION TYPE THERMAL OBJECT SENSOR</title><author>OOHATA YUTAKA</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPS5912378A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1984</creationdate><topic>COLORIMETRY</topic><topic>DETECTING MASSES OR OBJECTS</topic><topic>DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING</topic><topic>FREQUENCY-CHANGING</topic><topic>GEOPHYSICS</topic><topic>GRAVITATIONAL MEASUREMENTS</topic><topic>MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT</topic><topic>MEASURING</topic><topic>NON-LINEAR OPTICS</topic><topic>OPTICAL ANALOGUE/DIGITAL CONVERTERS</topic><topic>OPTICAL LOGIC ELEMENTS</topic><topic>OPTICS</topic><topic>PHYSICS</topic><topic>RADIATION PYROMETRY</topic><topic>SIGNALLING</topic><topic>TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF</topic><topic>TESTING</topic><topic>TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILARSIGNALS</topic><toplevel>online_resources</toplevel><creatorcontrib>OOHATA YUTAKA</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>OOHATA YUTAKA</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>EXTERNAL MODULATION TYPE THERMAL OBJECT SENSOR</title><date>1984-01-23</date><risdate>1984</risdate><abstract>PURPOSE:To detect even a low temperature heated object accurately by connecting a modulation section having a Faraday element to a point wih an appropriate environmental condition in the intermediate section of an optical fiber for transmitting infrared rays radiated from the heated object. CONSTITUTION:Infrared rays from a thermal object 1 enter a polarizer plate 6a through an optical fiber 3a of a low loss. When the light converted into a linearly polarized light with the polarizer plate 6a passes through a Faraday element 7, it generates a Faraday rotation under the influence of an AC magnetic field due to alternating current flowing through a coil 8. The angle of rotation is received with a polarizer plate 6b set in the direction of polarization axis at 45 deg. to the polarizer plate 6a and the quantity of light proportional to the angle of Faraday is outputted to an optical fiber 3b. This AC optical signal is received with a light receiving element 5 and after a photoelectric conversion, it is AC amplified and converted into DC to be displayed.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | COLORIMETRY DETECTING MASSES OR OBJECTS DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING FREQUENCY-CHANGING GEOPHYSICS GRAVITATIONAL MEASUREMENTS MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT MEASURING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS RADIATION PYROMETRY SIGNALLING TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TESTING TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILARSIGNALS |
| title | EXTERNAL MODULATION TYPE THERMAL OBJECT SENSOR |
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