A novel semiconductor laser digital scanner composed of a monolithic semiconductor laser array and a conventional plastic lens is proposed. A high speed scanning, a simultaneous light emission, and a wide angle scanning are achieved. The semiconductor laser array consists of monolithically integrated ten index-guided 780nm emitters spaced by 0.3mm. The lens is an aspheric plastic lens which is widely used in the compact disc system with 4.5mm focal length and 0.45 N.A.. The maximum scanning angle is about 43 degrees and the beam diameter (FWHM) on a screen varies from 0.10mm to 0.53mm. Computer simulation using the ray tracing method is performed. We have found that the calculated results on the spheric lens case fit well with experimental ones using the aspheric lens.
"Semiconductor Laser Digital Scanner", Proc. SPIE 1028, Scanning Imaging, (9 February 1989); doi: 10.1117/12.950352; https://doi.org/10.1117/12.950352