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Results for: 'SPA'
![](/wowza/users/w/a/waw/thumbs/6j6B10O2bV8kUbGef0sp.jpg)
Artist Tina Escaja. Sound activated, Infrared proximity sensor, audio detector, custom Arduino code. And Spanish poetry engraved in legs by laser.
![](/wowza/users/w/a/waw/thumbs/K62sAJ3uIn02HkahmdRa.jpg)
Conceived by Tina Escaja. Infrared proximity sensor, audio detector, custom Arduino code. And Spanish poetry engraved in legs by laser.
![](https://streaming.uvm.edu/cc-content/themes/overcast/assets/file-audio-regular.png)
Describes how transparent objects may only retard light without diffracting it
![](https://streaming.uvm.edu/cc-content/themes/overcast/assets/file-audio-regular.png)
Spatial deteil vs acceptance angle
Acceptance angle of objective must be wide enough to collect at least first order diffracted rays
![](https://streaming.uvm.edu/cc-content/themes/overcast/assets/file-audio-regular.png)
Spatial filtering in the transform plane
Using a small aperture slider to remove diffracted orders in the transform plane eliminates detail in the image plane.
![](https://streaming.uvm.edu/cc-content/themes/overcast/assets/file-audio-regular.png)
Object detail vs. acceptance angle
The finer the spatial detail in an object the wider the diffraction angle - easily seen with a laser pointer and a fine grating.