Tuesday, March 31, 2020

augmented microscope

the basic peppers ghost scheme (taken from wiki)

the setup

had couple of problems with this one 
mostly illumination differences between
the microscope and the lcd screen
the perspex seems to double the picture -
might be solved with tint filter or swapping the perspex 
with a thin glass beamsplitter or ar coating
resolution wise numbers was pretty clear at 800 x 600
thinking about adding a button
to act as a shutter for the screen (on/off)

the setup:
the oscilloscope is hooked through the vga port
to a small lcd display that is mounted to the peppers ghost setup
where the transparent part of the peppers ghost (perspex sheet)
is placed at the view screen of the microscope

some photos (it actually looks much better in real life)

the peppers ghost periscope


testing the setup

without tint sticker

with tint sticker

some videos (it actually looks much better in real life)

without tint sticker

using a car tint sticker (applied poorly) did the trick
and solved the double reflection of the lcd in the above video
while not disturbing the actual image when the lcd backlight was off

with tint sticker


with tint sticker

for future development i would like to try 
adding a camera and or a microphone for interactive control 
image processing (probe gesture) or sound (click sound)
or show an overlay image only when a signal is being detected 
lcd backlight triggering / oscilloscope dmm triggering follow a click sound 
maybe hooking a foot switch, eye tracking camera and so on...

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