[특허]Remote measurement of physical variables with fiber optic systems - methods, materials and devices

[미국특허] Remote measurement of physical variables with fiber optic systems - methods, materials and devices 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01N-021/64 G01K-011/12 G02B-005/14 G01L-007/02
출원번호	US-0711062 (1985-03-12)
발명자 / 주소	Kleinerman Marcos (24 Jerome St. Southbridge MA 01550)
인용정보	피인용 횟수 : 39 인용 특허 : 31

초록 ▼

Methods, materials and devices for the remote measurement of physical variables with fiber optic systems use a single excitation light source for generating through the use of at least one luminescence converter, both a signal beam and a reference beam, and allow the transmission of both beams through a single fiber to a single photodetector, thus producing photo-electric signals the relative intensities of which are only minimally affected by changes of the intensity of the interrogating light beam, optical losses, or detector drift. In contrast to the prior art, the luminescent materials of this invention can be used either as transducers for physical parameters or as means for processing information from other optical transducers, without requiring a change in the luminescence properties of said materials under the influence of the measured parameter. Furthermore, the techniques and devices of this invention allow the use of luminescent materials for converting a measurand with a low coefficient of change under the action of the parameter being measured into a measurand with a large coefficient of change.

대표청구항 ▼

A method for sensing variations in the magnitude of a physical parameter by use of a probe, and an interrogating light of suitable wavelength or wavelengths injected into said probe with an intensity Po, comprising the steps of: (a) exposing a light-transmitting probe to said physical parameter, said probe characterized by an ability to attenuate within said probe an interrogating light of suitable wavelength and an intensity Po entering the probe to an intensity Po(1-aaao of the intensity of the interrogating light into a light separable from the interrogating light, at least part of the intensity of which is emitted from the probe at wavelengths l1 different from the wavelength of the interrogating light. (b) injecting into the probe interrogating light of intensity Po and of a wavelength or wavelengths within a suitable spectral region, thereby converting the fraction ao of the intensity of said injected interrogating light into emitted light at least part of the intensity of which is emitted from the probe at the wavelengths l1 different from the wavelength or wavelengths of the interrogating light, the value of aa

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[미국특허] Remote measurement of physical variables with fiber optic systems - methods, materials and devices 원문보기

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[미국특허] Remote measurement of physical variables with fiber optic systems - methods, materials and devices 원문보기

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