Design of circular-shape no-loss bent lightpipe with a novel transform of elliptical form

Abstract

We provide a novel scheme in designing no-loss bent light-pipe with the help of a transformation of elliptical form on equiangular spiral.

An innovative vehicle headlamp design based on a high-efficiency LED light pipe system

“…The ray is divided into two beams by a prism splitter, and the beams are matched with their respective light pipes. [9][10][11] According to Figure 5, each light pipe rotates 0 degrees, where is the branching angle and ¼ 0 þ 0 . The light pipe is an optical element that guides light from the prism splitter to the headlamps.…”

“…8 After that, the rays are divided into two beams by a prism splitter and each beam is guided to each headlamp by a light pipe. [9][10][11] We apply the system to the Audi A1 12 as a simulation vehicle. In order to verify the validity of the work, a computer simulation is undertaken to show the resulting light distribution and the illuminance at each test point.…”

Optical design of light guide prisms with surface roughness for automotive tail lights

“…For the optical design of a long light guide with circular cross section, the most important parameters that affect the luminous intensity and the illuminance uniformity are length, diameter, possible bending, the prism geometry and the distribution characteristics of the light source. 7–15…”

“…For the optical design of a long light guide with circular cross section, the most important parameters that affect the luminous intensity and the illuminance uniformity are length, diameter, possible bending, the prism geometry and the distribution characteristics of the light source. [7][8][9][10][11][12][13][14][15] To our knowledge, although the light guide technology is widely used in exterior and interior automotive lighting systems, there is no report on the optical design of the light guides with the surface roughness. This study addresses the optical design of light guide prisms with the surface roughness for automotive tail light applications.…”