Integrated camera mounting and image window cleaning device
US-2015353057-A1 · Dec 10, 2015 · US
Laser gas analyzer
US2019346366A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2019346366-A1 |
| Application number | US-201916406793-A |
| Country | US |
| Kind code | A1 |
| Filing date | May 8, 2019 |
| Priority date | May 11, 2018 |
| Publication date | Nov 14, 2019 |
| Grant date | — |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A laser gas analyzer includes: an optical emitter that irradiates laser light onto a measurement target gas; a reflector that reflects the laser light after the laser light passes through the measurement target gas; an optical receiver that receives the reflected laser light; a controller that controls the optical emitter and processes an output signal from the optical receiver; a tubular measurement target gas passage disposed between the optical emitter and the reflector and that includes an opening that allows the measurement target gas to flow into and out of the measurement target gas passage; a first purge region disposed on the optical emitter side of the measurement target gas passage; and a first separation wall that separates the measurement target gas passage and the first purge region and that includes a hole through which the laser light passes.
First claim
Opening claim text (preview).
1 . A laser gas analyzer comprising: an optical emitter that irradiates laser light onto a measurement target gas; a reflector that reflects the laser light after the laser light passes through the measurement target gas; an optical receiver that receives the reflected laser light; a controller that controls the optical emitter and processes an output signal from the optical receiver; a tubular measurement target gas passage disposed between the optical emitter and the reflector and comprising an opening that allows the measurement target gas to flow into and out of the measurement target gas passage; a first purge region disposed on the optical emitter side of the measurement target gas passage and filled with a purge gas without a component to be measured in the measurement target gas; and a first separation wall that defines a boundary between the measurement target gas passage and the first purge region, and comprising a hole through which the laser light passes; wherein a surface of the first separation wall that faces the optical emitter is uneven to diffuse the laser light, or has been subjected to surface treatment to diffuse or absorb the laser light. 2 . The laser gas analyzer of claim 1 , further comprising: a second purge region disposed on the reflector side of the measurement target gas passage and filled with a purge gas; and a second separation wall that defines a boundary between the measurement target gas passage and the second purge region, and comprising a hole through which the laser light passes; wherein a surface of the second separation wall that faces the optical emitter is uneven to diffuse the laser light, or has been subjected to surface treatment to diffuse or absorb the laser light. 3 . The laser gas analyzer of claim 1 , wherein the surface treatment is blasting. 4 . The gas analyzer of claim 1 , wherein a position of the optical emitter is adjustable relative to the first separation wall in a direction orthogonal to an optical axis of the laser light.
Assignees
Inventors
Classifications
Diode laser · CPC title
using tunable lasers · CPC title
Gas blown · CPC title
- G01N21/15Primary
Preventing contamination of the components of the optical system or obstruction of the light path · CPC title
Stray light conditioning · CPC title
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Frequently asked questions
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- What does patent US2019346366A1 cover?
- A laser gas analyzer includes: an optical emitter that irradiates laser light onto a measurement target gas; a reflector that reflects the laser light after the laser light passes through the measurement target gas; an optical receiver that receives the reflected laser light; a controller that controls the optical emitter and processes an output signal from the optical receiver; a tubular measu…
- Who is the assignee on this patent?
- Yokogawa Electric Corp
- What technology area does this patent fall under?
- Primary CPC classification G01N21/15. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Thu Nov 14 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).