The side of the mirror is straight,like the surface of a flat mirror....
How Cylindrical Mirror Anamorphosis Works
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| The Law of Reflection A cylindrical mirror distorts information in two different directions. To see why this is true, look at the cylinder from two different points of view... |
The side of the mirror is straight,like the surface of a flat mirror.... |
but its edges are rounded, like the surface of a curved mirror. | |||
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| In both situations, the angle of incidence is equal to the angle of reflection. In the case of a curved surface, these angles are measured from a line tangent to the curve at a specific point. |
The Cone of VisionLight rays travel to our eyes in straight lines from all directions. The area of the pupil is small compared to the area from which light may travel. This causes an effect called the "cone of vision". The cone of vision causes some interesting patterns when combined with the way light is reflected in curved mirrors. Rays (shown as traveling from the pupil) strike the surface of the mirror at various angles. |
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| This pattern shows the radial reflection of light due to the law of reflection for curved mirrors and the cone of vision. | This pattern shows how light rays spread out as they strike farther and farther from the mirror, due to the variation in the angle of incidence. | ||
| The anamorphic transformation produces a set of polar coordinates that return to their rectangular origins when viewed with a cylindrical mirror. | |||
| rectangular grid | polar grid | ||
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