The projection distance is positively correlated with the pattern size. When the distance increases by 1 meter, the diameter of the pattern expands by about 0.32 times (the lens ratio is 1:0.32, and the proportion of different lenses is different) (formula: the pattern diameter is ≈ the projection distance × 0.32). For example, at a distance of 3 meters, the pattern is about 0.96 meters in diameter. Read More
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