Here is my first attempt using the printed 50x50 screen on film on a glass plate and a repurposed kids wood project box and a light bulb , like the Bartels box. Rough but worked.
The next iteration was the LED in a tube and glass ronchi so the eye can be closer to the light source and a view looking through the screen above the light source . On the table with the mirror at centre of curvature in a black box , looking though the screen which is on an adjustable music stand in either case.
Very sensitive to exact position so the stand needs to be movable and adjustable.
Quote:
Originally Posted by legswilly
Had a look at the Bartels light box and it could not be simpler. Next I want the grid.
Thank you for the answer.
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