2 results about "Laser display" patented technology

The invention discloses a vehicle-mounted projection system, and belongs to the technical field of vehicles. The system comprises a transmission module, a processing module and a laser display device, wherein the transmission module is used for receiving navigation data; the processing module is used for processing the navigation data to obtain a navigation picture; the laser display device is used for projecting the navigation picture to an appointed position at a front roadway of the vehicle. The navigation picture of the vehicle is projected to the front roadway of the vehicle in a laser display mode, the visibility is improved, and the projection effect is guaranteed.

The invention provides a 1.2 micron wavelength all-solid-state Raman laser, and belongs to the technical field of solid-state laser. The 1.2 micron wavelength all-solid-state Raman laser comprises a pumping source, a coupling lens group and a resonant cavity. A laser crystal, a Q-switched device and a Raman crystal are arranged in the resonant cavity. Constant temperature of the crystals and the device is maintained by a temperature control system. 1.1 micron fundamental frequency light is generated by Nd:YAG ceramic, and 1252nm Raman light is outputted by the Raman crystal SrWO4. Raman shift is performed on 1.1 microns fundamental frequency wave of neodymium-doped crystals for the first time as we know. When the pumping power is 21.3W and the pulse repetition frequency is 5KHz, the maximum output power of the obtained 1252nm Raman light is 1.02W and an optical conversion efficiency is 4.79%. Dielectric films capable of outputting the required wavelength are coated on an input lens M1, an output lens M2 and the end surface of the laser crystal and the Raman crystal. The laser can be used as a pumping source of a Raman amplifier of 1.26-1.36 micron communication window band and is an important application in laser display. Besides, the laser can also be applied to the biological, medical and astronomical fields.