4 ms·
This is inefficient. Some semi-transparent laquer applied to the lens that makes the picture permanently blurred would be much less conspicuous.
by nine_k 9mo ago
This is inefficient. Some semi-transparent laquer applied to the lens that makes the picture permanently blurred would be much less conspicuous.
- culi 9mo agoAn infrared laser beam could also do the trick. The beam would be invisible to the human eye