[특허]Optical device for measuring slight differences of pressure by means of a change in light intensity

Optical device for measuring slight differences of pressure by means of a change in light intensity 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01L-009/00
출원번호	US-0181696 (1980-08-27)
우선권정보	DE-2937484 (1979-09-17)
발명자 / 주소	Fromm Ingrid (Munich DEX)
출원인 / 주소	Siemens Aktiengesellschaft (Berlin & Munich DEX 03)
인용정보	피인용 횟수 : 29 인용 특허 : 0

초록 ▼

An optical device for measuring slight pressure differences by means of a light intensity change characterized by a membrane extending across a recess of a housing part to form a first chamber of a first volume which is isolated from a second chamber on the opposite side of the membrane, a right angle isosceles glass prism mounted in the recess with a hypotenuse surface facing said membrane and extending parallel thereto, an input optical waveguide coupled to one short side surface of the prism extending to the light source of a given light intensity for coupling light from said source into the prism and an output optical waveguide being coupled to the other short side surface of the prism for output coupling light from the prism to a measuring device. The surface of the membrane opposite the hypotenuse surface is a light receiving surface such as either by absorbing light or being permeable to light and the membrane surface with the membrane in an idle condition is spaced at an interval such as not greater than the wavelength of the light being used so that approximately 50% of the coupled in light intensity is totally reflected by the hypotenuse surface. Changes in the position of the membrane will cause changes in the intensity which can be measured to determine the pressure differences.

대표청구항 ▼

An optical device for measuring slight pressure differences by means of a light intensity change, said device comprising a housing part having a recess; a membrane secured on said housing part to extend across said recess to form a first chamber of a first volume; a protective cap engaging the other surface of said member and forming a second chamber of a second volume opposite said first chamber, said housing part including means for communicating the first chamber with an atmosphere of desired pressure; a right angle isosceles glass prism being mounted in said recess with the hypotenuse surface facing said membrane and extending parallel thereto; an input optical waveguide being coupled to one short side surface of said prism and extending to a light source of a given light intensity for coupling light from said source into said prism; an output optical waveguide being coupled to the other short side surface of the prism for output coupling light from said prism; a surface of the membrane opposite said hypotenuse surface being a light receiving surface, said membrane surface with the membrane in an idle condition being spaced at an interval so that approximately 50% of the coupled in light intensity is totally reflected by the hypotenuse surface; and means for measuring the light intensity being connected to the free end of the output waveguide, so that changes in the pressure in the second chamber relative to the pressure in the first chamber cause a deflection of said membrane to vary the optical light intensity being received by the means for measuring.

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Malmstrom, James A.; Beck, Kent F.; Miles, Scott D., Optical pressure monitoring system.
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Malmstrom,James A.; Beck,Kent F.; Miles,Scott D., Optical pressure monitoring system.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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연합인증

Optical device for measuring slight differences of pressure by means of a change in light intensity 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

이 특허를 인용한 특허 (29)

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Optical device for measuring slight differences of pressure by means of a change in light intensity 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

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이 특허를 인용한 특허 (29)

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