SPECKLE ELIMINATION APPARATUS, LASER SOURCE, AND LASER PROJECTION SYSTEM
The utility model discloses a speckle elimination apparatus, a laser source, and a laser projection system. The speckle elimination apparatus includes a wave plate on a laser optical path, the wave plate being arranged to allow 25%-75% of an incident laser beam to pass through directly. The utility model can eliminate the laser speckle phenomenon.
1 . A speckle elimination apparatus, comprising a wave plate on a laser optical path, the wave plate being arranged to allow 25%-75% of an incident laser beam to pass through directly.
2 . The speckle elimination apparatus according to claim 1 , wherein the wave plate is arranged to allow 50% of the incident laser beam to pass through directly.
3 . The speckle elimination apparatus according to claim 1 , wherein the wave plate is a half-wave plate.
4 . The speckle elimination apparatus according to claim 1 , wherein the speckle elimination apparatus further comprises a diaphragm on an emergent optical path of the wave plate.
5 . The speckle elimination apparatus according to claim 4 , wherein the wave plate is an annular wave plate having a central opening.
6 . The speckle elimination apparatus according to claim 4 , wherein the wave plate is an annular wave plate having a central opening of a centrosymmetric shape, the annular wave plate being arranged concentrically with a light through hole of the diaphragm.
7 . The speckle elimination apparatus according to claim 4 , wherein the wave plate is an annular wave plate having a central circular opening, the annular wave plate being arranged concentrically with a light through hole of the diaphragm.
8 . The speckle elimination apparatus according to claim 4 , wherein the wave plate is arranged adjacent to the diaphragm on an optical path direction.
9 . A laser source, comprising a laser device for emitting laser, and further comprising the speckle elimination apparatus according to claim 1 .
10 . A laser projection system, comprising the laser source according to claim 9 .
11 . A laser source, comprising a laser device for emitting laser, and further comprising the speckle elimination apparatus according to claim 2 .
12 . A laser source, comprising a laser device for emitting laser, and further comprising the speckle elimination apparatus according to claim 3 .
13 . A laser source, comprising a laser device for emitting laser, and further comprising the speckle elimination apparatus according to claim 4 .
14 . A laser source, comprising a laser device for emitting laser, and further comprising the speckle elimination apparatus according to claim 5 .
15 . A laser source, comprising a laser device for emitting laser, and further comprising the speckle elimination apparatus according to claim 6 .
16 . A laser source, comprising a laser device for emitting laser, and further comprising the speckle elimination apparatus according to claim 7 .
17 . A laser source, comprising a laser device for emitting laser, and further comprising the speckle elimination apparatus according to claim 8 .