Laser Despeckle Device
A projection system including at least a laser light source, an image generator, a projection lens assembly, and a despeckling device. The image image generator modulates laser light from the laser light source to form a projection image. The projection lens assembly is positioned downstream of the image generator and projects the projection image. The despeckling device limits laser speckle of the projected projection image.
1 . A projection system, comprising:
a laser light source;
an image generator to modulate laser light from the laser light source to form a projection image;
a projection lens assembly downstream of the image generator to project the projection image; and
a despeckling device operably positioned intermediate the laser light source and the image generator, the despeckling device being configured to limit laser speckle of the projected projection image.
2 . The projection system of claim 1 , where the despeckling device includes a matrix of cells individually controllable to change a phase of light from the laser light source.
3 . The projection system of claim 2 , where the image generator includes an LCD image generator.
4 . The projection system of claim 2 , where the image generator includes a DLP image generator.
5 . The projection system of claim 2 , where the despeckling device includes at least one variable phase plate.
6 . The projection system of claim 1 , where the despeckling device includes a matrix of cells individually controllable to change a polarity of light from the laser light source.
7 . The projection system of claim 6 , where the image generator includes an LCD image generator.
8 . The projection system of claim 6 , where the image generator includes a DLP image generator.
9 . The projection system of claim 6 , where the despeckling device includes at least one variable polarization rotator.
10 . A projection system, comprising:
a laser light source;
an image generator to modulate laser light from the laser light source to form a projection image;
a projection lens assembly downstream of the image generator to project the projection image; and
a despeckling device operably positioned downstream of the image generator, the despeckling device being configured to limit laser speckle of the projected projection image.
11 . The projection system of claim 10 , where the despeckling device includes a matrix of cells individually controllable to change a phase of light from the laser light source.
12 . The projection system of claim 11 , where the image generator includes an LCD image generator.
13 . The projection system of claim 11 , where the image generator includes a DLP image generator.
14 . The projection system of claim 11 , where the despeckling device includes at least one variable phase plate.
15 . The projection system of claim 10 , where the despeckling device includes a matrix of cells individually controllable to change a polarity of light from the laser light source.
16 . The projection system of claim 15 , where the image generator includes an LCD image generator.
17 . The projection system of claim 15 , where the image generator includes a DLP image generator.
18 . The projection system of claim 15 , where the despeckling device includes at least one variable polarization rotator.
19 . The projection system of claim 10 , where the despeckling device is operably positioned intermediate the image generator and the projection lens assembly.
20 . The projection system of claim 10 , where the despeckling device is operably positioned downstream of the projection lens assembly.