Plux biosignalsplux Light, Руководство пользователя

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Light (LUX)
User Manual
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1. General Information
1.1. General Description
Our Light (LUX) sensor has been especially designed for the synchronization of the recorded data with
external sources (e.g. a computer screen for visual evoked potentials). If applied to the computer
screen, our
LUX sensor can be used to detect chromatic changes in the stimuli, hence providing a
synchronization source. The LUX sensor can also be useful for optical synchronization with third-party
devices (provided that the third-party device can trigger a LED), in applications where it is important
to have electrical decoupling between devices.
In addition,
Light (LUX) sensor can be used for the specific purpose of tracking physiological responses
(e.g. heart rate) in dependence of the ambient light changes or visual evoked potentials.
Figure 1: biosignalsplux Light (LUX) sensor (standard version).
1.2. Typical Unfiltered Sensor Output
Figure 2 shows a typical unfiltered LUX sensor output acquired while light changes. The raw digital
sensor values received from the biosignalsplux device ranged between 0 and 2
n
-1 ( n=sampling
resolution ) and were normalized into values between 0 and 1 using the transfer function found in
section Transfer Function (Conversion Formula) .
Figure 2: Typical unfiltered LUX sensor output while light change.