The effects of different pitch and angle of gradual-triangle lenticular lens for the point-blank LED fog lamp were investigated under the standard of ECE R19. The novel LED fog lamp was assembled from a point-blank LED light source, a parabolic reflector, and a gradual-triangle lenticular lens. Light tracing analysis was used for the design of the gradual-triangle lenticular lens. The pitch, which varied from 1 to 6 mm, and the apex angle, which changed from 5 to 32 deg, were both investigated in regard to the gradual-triangle lenticular lens. The optimum pitch was 5 mm, and the efficiency of the lamp system and lenticular lens could reach 93% and 98.1% by simulation, respectively. The results of experiment had over 94%, which is similar to that of simulation by normalized cross correlation (NCC) for the light intensity.
© 2014 Optical Society of America
Optical Design and Fabrication
Original Manuscript: March 12, 2014
Revised Manuscript: April 9, 2014
Manuscript Accepted: April 11, 2014
Published: May 9, 2014
Hsi-Chao Chen and Chi-Hao Yang, "Investigation of pitch and angle in the gradual-triangle lenticular lens for point-blank LED fog lamp," Appl. Opt. 53, 3110-3118 (2014)