ON UNIFORMITY OF RASTER ILLUMINATION UNDER LASER SCANNING

Abstract

The paper considers the possibility of a flat light field creation (light raster) of a large size by laser scanning at a distance of several tens of meters with angular sizes equal to 20º×4º. It is shown that the filling of such size raster by light is possible with the use of a single laser. The uniformity of light raster illumination is achieved by choice of parameters for collimating and scanning optical systems, the speed of light spot movement on the line and frame, turnover frequency of frames, spot light overlap factor. We present findings that give the possibility to obtain relatively uniform raster illumination at laser scanning and the filling of large size raster with low power laser light from the radiation source.

Keywords

• laser scanning
• collimating optics
• scanning system
• beam overlap factor
• beam angular divergence
• illumination
• flat light field