tdehaeze/digital-brain
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Update Content - 2020-10-15

Browse Source
This commit is contained in:
Thomas Dehaeze
2020-10-15 21:36:53 +02:00
parent f1cad23157
commit f1c89b14f6
113 changed files with 834 additions and 786 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
content/zettels/interferometers.md
View File

@@ -4,6 +4,10 @@ author = ["Thomas Dehaeze"]
draft = false
+++
Backlinks:
- [Position Sensors]({{< relref "position_sensors" >}})
Tags
: [Position Sensors]({{< relref "position_sensors" >}})
@@ -38,16 +42,16 @@ Tags
## Interferometer Precision {#interferometer-precision}
([Jang and Kim 2017](#org95c0093))
([Jang and Kim 2017](#orgc0eaaa4))
<a id="org69d5980"></a>
<a id="orge2a3743"></a>
{{< figure src="/ox-hugo/position_sensor_interferometer_precision.png" caption="Figure 1: Expected precision of interferometer as a function of measured distance" >}}
## Sources of uncertainty {#sources-of-uncertainty}
Sources of error in laser interferometry are well described in ([Ducourtieux 2018](#orgd56bef1)).
Sources of error in laser interferometry are well described in ([Ducourtieux 2018](#org2c23555)).
It includes:
@@ -57,16 +61,16 @@ It includes:
- Pressure: \\(K\_P \approx 0.27 ppm hPa^{-1}\\)
- Humidity: \\(K\_{HR} \approx 0.01 ppm \% RH^{-1}\\)
- These errors can partially be compensated using an environmental unit.
- Air turbulence (Figure [2](#org0f5db6f))
- Air turbulence (Figure [2](#org92b4926))
- Non linearity
<a id="org0f5db6f"></a>
<a id="org92b4926"></a>
{{< figure src="/ox-hugo/interferometers_air_turbulence.png" caption="Figure 2: Effect of air turbulences on measurement stability" >}}
## Bibliography {#bibliography}
<a id="orgd56bef1"></a>Ducourtieux, Sebastien. 2018. “Toward High Precision Position Control Using Laser Interferometry: Main Sources of Error.” <https://doi.org/10.13140/rg.2.2.21044.35205>.
<a id="org2c23555"></a>Ducourtieux, Sebastien. 2018. “Toward High Precision Position Control Using Laser Interferometry: Main Sources of Error.” <https://doi.org/10.13140/rg.2.2.21044.35205>.
<a id="org95c0093"></a>Jang, Yoon-Soo, and Seung-Woo Kim. 2017. “Compensation of the Refractive Index of Air in Laser Interferometer for Distance Measurement: A Review.” _International Journal of Precision Engineering and Manufacturing_ 18 (12):1881–90. <https://doi.org/10.1007/s12541-017-0217-y>.
<a id="orgc0eaaa4"></a>Jang, Yoon-Soo, and Seung-Woo Kim. 2017. “Compensation of the Refractive Index of Air in Laser Interferometer for Distance Measurement: A Review.” _International Journal of Precision Engineering and Manufacturing_ 18 (12):1881–90. <https://doi.org/10.1007/s12541-017-0217-y>.