4 BASIC CONCEPTS
4.1.8 Environmental Module
The Environmental Module is an accessory that records temperature, humidity and the pressure
of the surrounding of the
PICOSCALE. These data influence the refractive index of the air. By
tracking the environmental data the position data calculated by the
PICOSCALE can be corrected
for the respective fluctuations.
4.2 Data sources
Data sources are the basic data elements that provide data of any digital form over time. Position
of the target mirror, environmental temperature or GPIO data are data sources, for example. Data
sources that are related to each other are bundled into a channel.
The values of data sources may be retrieved from the device by streaming or polling them to the
user PC. The user may select a sub set of all available data sources and let the device stream the
values of these data sources over a period of time. An overview of all available data sources is
given in table 4.1.
Table 4.1: Overview of all streamable data sources. The data sources that are provided by the
modules are bundled into channel 1.
Channel 1 Channel 2 Channel 3
Position Position Position
Velocity Velocity Velocity
Acceleration Acceleration Acceleration
S(ω) raw S(ω) raw S(ω) raw
S(2ω) raw S(2ω) raw S(2ω) raw
S(ω) S(ω) S(ω)
S(2ω) S(2ω) S(2ω)
Counter 1&2
Env. module temperature
Env. module humidity
Env. module pressure
GPIO ADC 1-3
Calculation System 1-3
24
PicoScale User Manual
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