The SEELablet can be interfaced with a 3648 pixel linear Optical array (TCD1304) from Toshiba. Its large pixel size , and configurable integration times up to 1 second enable data acquisition under very low light conditions

Spectral response of each of the 3648 pixels of the TCD1304 sensor
Spectral response of each of the 3648 pixels of the TCD1304 sensor

Graphical Interface for the sensor. A ruler was placed on the sensor’s glass, and the spikes are caused by the markings on the ruler. The Y Axis is inverted

 


 

 

A simple diffraction grating was used to study the diffraction spectra of a few coloured light sources such as the WS2812B (RGB LED), a torch, and a laser diode.

 

Sensor element, and RGB LED

The WS2812B RGB LED can be configured via SQR1, and the user can pick the color using the built-in color picker widget.


 

Figure : Shortest wavelengths to the left, infrared to the right. The peak for RED shows slight saturation here because ICG (integration time) was set too high.

Figure : Green and blue peaks are visible if the colour is set to Cyan. The second order of the spectra is also visible

 

Figure : A laser has sharper spectra. Shown here is the spectra from a commonly available red diode laser.

 

Linear Optical Sensing Array
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