| 摘要 |
A projection device includes a light source, a galvano-mirror, a polarizing selector, an optical module, a light modulator, a lens, and a prism group. The light source is configured to provide a light beam. The galvano-mirror is configured to deflect the light beam to different directions in sequence. The polarizing selector is configured to selectively convert the polarization state of the light beam. The optical module has an entrance and an exit. The light beam passing through the polarizing selector enters the optical module from the entrance, and the optical module guides the light beam to the exit. The optical module includes a polarization beam splitter, a reflector, a first wavelength retarder, a right-angled triangular prism, and a second wavelength retarder. The polarization beam splitter guides the light beam that entering the entrance to different optical paths according to the polarization state of the light beam. |
| 主权项 |
1. A projection device, comprising:
a light source for providing a light beam; a galvano-mirror configured to deflect the light beam to different directions in sequence; a polarizing selector configured to selectively convert the polarization state of the light beam; an optical module having an entrance and an exit, wherein the light beam passing through the polarizing selector enters the optical module from the entrance, and the optical module guides the light beam to the exit, the optical module comprises:
a polarization beam splitter having the entrance and the exit, wherein the polarization beam splitter guides the light beam that entering the entrance to different optical paths according to the polarization state of the light beam;a reflector;a first wavelength retarder disposed between the polarization beam splitter and the reflector;a right-angled triangular prism having a hypotenuse surface and two leg surfaces opposite to each other, wherein the hypotenuse surface of the right-angled triangular prism is disposed facing the polarization beam splitter; anda second wavelength retarder disposed on one of the leg surfaces of the right-angled triangular prism; a light modulator configured to modulate the light beam passing through the exit of the optical module into a plurality of images in sequence; a lens; and a prism group configured to guide the light beam passing through the exit of the optical module to the light modulator, and guide the images to the lens. |
