A Study on the Development of a White Light Source Module for a Large-Capacity Searchlight Using a Blue Laser Diode

In this paper, a large-capacity white light source module using high-power blue laser diode and reflective spaced phosphor was designed. The spacing ensured thermal stability. proposed is structure with bi-directional optical system based on rhombus prism lens. can greatly narrow the beam width long-wavelength band-pass filter of 500 nm or more applied to change movement path transmit excited by phosphor. A dichroic fold mirror part planar convex lens designed focus so that irradiated. Finally, obtained from pre-optics unit which applied. order use as searchlight, divergence angle 4° less required. For implementation, large-area collimating combining an aspheric condensing achromatic It confirmed 4 degrees satisfied at focal length (FL) 38.5 42.5 mm emitter system.