| 摘要 |
An optical system for a projector is provided to focus light emitted with the same emission angle on one point by a cap lens surrounding a light emitting surface of a light emitting diode. In an optical system for a projector, a light emitting diode(100) emits light of a special wavelength. A cap lens(110) surrounds a light emitting surface of the light emitting diode, and focuses light having the same emission angle(alpha) among the light emitted from the light emitting diode on one point. An angle declining lens(120) receives the light focused by the cap lens, and emits the focused light at a lower emission angle than the emission angle of the focused light in the light emitting diode. An optical component group(200) receives and emits the light emitted from the angle declining lens. |
