 Blazed diffraction grating profile. |
Chromatek's 3D glasses were invented by Richard Steenblik as a way to amplify the very slight chromostereoscopy phenomenon occasionally noticed by people who wear spectacles into a useful display tool. It gives viewers a depth effect when they are wearing the "double prism, refraction glasses." The two first order gratings displace red more than blue on opposite diretions. Figure 1 shows the displacments.
A cross section of the left lens is shown in the diagram.
|
Blazed diffraction grating profile. |
The grating has a saw-tooth profile with a groove spacing of 32 lines per mm. The grating is said to be blazed. The ray refracts as it passes through the plastic, which allows almost all of the energy to appear in the first order spectrum on one side.
 |
 |
|
 |
 |
 |
 |
 |
 |
 |
 |
 |