- #1

heavystray

- 71

- 0

Hello,

So, here's an article about invisibility cloaking

What I don't understand is how's the object between the lenses is cloaked. Is it because the rays are focused to a point after it passed through the first lens? (hence, there will be a region where rays do not pass through?) assuming that's the answer, but then in that case, isn't that, only rays that are parallel to the optical axis come into focus at one point? (which is the focal point) how about the rays that pass through optical center and the rays that pass through the first focal point and become parallel? if we draw a diagram, wouldn't these two principal rays disturb the cloaking region? i tried to draw a ray diagram to understand how this works. the final image of the object would be magnified and upright, but i still couldn't understand why can't we see the image, I really hope anyone here clear up my confusion because i have been thinking about this for days and my physics teacher couldn't help me that much. I have a very basic knowledge in optics such as constructing ray diagrams and solving problems using the thin lens equation. I'm sure there must be some concepts that i didn't know about. Here, I attach two diagrams i constructed to explain in a clearer way-hopefully- of what i don't understand. thank you in advance

So, here's an article about invisibility cloaking

What I don't understand is how's the object between the lenses is cloaked. Is it because the rays are focused to a point after it passed through the first lens? (hence, there will be a region where rays do not pass through?) assuming that's the answer, but then in that case, isn't that, only rays that are parallel to the optical axis come into focus at one point? (which is the focal point) how about the rays that pass through optical center and the rays that pass through the first focal point and become parallel? if we draw a diagram, wouldn't these two principal rays disturb the cloaking region? i tried to draw a ray diagram to understand how this works. the final image of the object would be magnified and upright, but i still couldn't understand why can't we see the image, I really hope anyone here clear up my confusion because i have been thinking about this for days and my physics teacher couldn't help me that much. I have a very basic knowledge in optics such as constructing ray diagrams and solving problems using the thin lens equation. I'm sure there must be some concepts that i didn't know about. Here, I attach two diagrams i constructed to explain in a clearer way-hopefully- of what i don't understand. thank you in advance