There are numerous explanation why one may wish to have the sensor of their digicam modified. We see it on a regular basis for many who want to shoot infrared or ultraviolet pictures. There are even corporations on the market who will do the entire course of for you. Normally, although, it doesn’t contain stripping off the Bayer filter array. Usually it’s simply eradicating the filter that blocks UV and IR.
Nicely, for Les Wright at Les’ Lab, simply eradicating the blocking filter on his Raspberry Pi digicam wasn’t sufficient. he needed all of the uncooked information, with none color interference in any respect from each pixel on the sensor. So, he went on a mission to determine away to take away it with out killing the sensor. Finally, the very best methodology proved to be to burn it off with a laser!
It’s a fairly excessive mod. Most likely probably the most excessive modifications I’ve ever seen on a digicam sensor – particularly when you think about what lasers sometimes do to digicam sensors. And simply three weeks in the past, Sony issued a warning to not expose your lens to laser beams because of the injury it will possibly trigger to your sensor. After all, sending a laser via your lens and having absolutely the management that Les has in his experiment are two various things.
Les says he killed numerous Raspberry Pi digicam sensors attempting to determine the proper approach to strip the Bayer sensor from the digicam sensor. He tried all types of abrasive and chemical solvent-based options earlier than lastly giving it a go together with his nitrogen laser. The issue was merely that the circuitry surrounding the sensor is simply far too delicate and really simply broken. And the slightest bit of harm kills your entire module.
Why would anyone wish to do that? Nicely, not everyone makes use of cameras for his or her aesthetic skills. For some, they’re scientific instruments. And with the Bayer sensor faraway from the sensor, it’s capable of see gentle at wavelengths far past the visible spectrum, and even additional than many IR and UV-converted cameras, letting him see particular chemical substances and emissions current within the scene that will in any other case be undetectable.
To carry out the laser surgical procedure, Les constructed a rig that will enable him to basically CNC management the motion of the laser over the sensor, together with a imaginative and prescient system utilizing a Raspberry Pi with one other PiCam (naturally!) that will let him align every part correctly and monitor the progress in real-time. In whole, it took about half an hour to carry out the elimination of the Bayer array, and it opens up numerous choices for each scientific and artistic makes use of of the Pi digicam.
I ponder if the Pi Basis could possibly be satisfied to fabricate one which comes shipped with out the Bayer filter array or an IR/UV blocker in any respect? I imply, they already make an infrared digicam module, so it wouldn’t be an excessive amount of of a stretch!