Below are the images shows you the LED used. If you compare with the hand next to, you could know the approximate size.
We tested fresnel lens and general spherical lens, and below would be made using fresnel lens. In fact, fresnel lens is not suitable for image becase its surface that circumflexs light is not consecutive. It does not matter to use the first and the second lens before it pass through the image. However, break of lens would appear when you apply fresnel lens to the third lens after it pass through the image.
The third lens was changed to the convex. There are no diffrence in intensity and clarity, but the break of lens diappears and the image become much more clear. This is what projected from the floor to the ceilling at about 3m away, and the size was Ø1m.
Similarly, we made the product which projects images in the floor installing at streetlight as university students start-up items, and it proceeded to commercialization. I hope that there would be a good news about this product soon.