| 摘要 |
A laser projection device for attachment to a bicycle, the device comprising a laser light source operable to emit a beam of laser light in a first direction, a mirror, a diffractive optical element, the arrangement being such that, in use, a beam of laser light emitted by the laser light source is reflected by the mirror through the diffractive optical element and emitted from the device in a second direction, said second direction being non-parallel to said first direction. |
