A commonly observed interference pattern is one seen through overlapping grid mesh fences as one moves past them. If there is another fence or grid like screen behind the front fence, as one moves past the system an overlapping pattern of moving dark and light interference patterns are observed. Interference patterns created as light travels through the grid patterns of the fences to your moving eye.
Similar to effects described in optics where the interference patterns made from overlapping incident waves are observed on a screen. Young interference fringes being the classic example.
An example of moving interference fringes from 2 overlapping grid mesh screens can be seen at...
3D image
3D images
The resulting observed interference patterns of overlapping grids as shown in the above fence description depend on what grid pattern is particular to each of the two overlapping grids.
So for instance two overlapping grids consisting of vertical bars will create to the distant viewer interference patterns of much larger light and dark bars.
Or, two overlapping grids made of a cross mesh of horizontal and vertical strands will give to a distant viewer an image of much larger square grid pattern.
My experience is that two identical overlapping grid patterns about two meters apart and consisting of grid square meshes of about 2 inches spacing between wires, when seen by an observer from a distance of 100 feet approx will give interference square grid patterns of about ten times the size of the initial 2 grids
How to use this effect to make a standalone 3D image screen. I.e. A 3D tv screen that is an image from a screen that supplies the 3D image to the viewer who sits at a distance from the screen without the viewer needing 3D goggles.
Basically duplicate the effect mentioned above of the overlapping fences of grid mesh patterns. But on a MUCH a smaller scale using LCD technology.
So instead of:
A)two grids of 20cm spaced vertical and horizontal wires, each grid spaced two meters apart from the other and viewed by an observer at 200 meters distance.
One has:
B) two overlapping transparent LCD screens each with grid image of vertical and horizontal lines each spaced .02mm apart, each screen spaced approx .02 cm apart and observed by a viewer at 20 cm distance.
Provided each LCD was transparent and both are backlit by the same source a 3D image of a much larger grid pattern than the two overlapping LCD screens should be observable.
Moving or changing the grid on one layer relative to the other should give animated motion to the observed interference patterns.
Presumably complex moving overlapping patterns on each LCD grid would give complex and or realistic effects of images in 3D to the viewer.
Without the need for 3D goggles.
