Since the first light-emitting diode (LED) was invented by Holonyak and Bevacqua in 1962,
LEDs have made remarkable progress in the past few decades with the rapid development …

Application specific LED packaging (ASLP) is an emerging technology for high performance
LED lighting. We introduced a practical design method of compact freeform lens for …

We propose a numerical optimization method designing LED array for achieving a good
uniform illumination distribution on target plane. Simulated annealing algorithm is employed …

A conformal phosphor coating can realize a phosphor layer with uniform thickness, which
could enhance the angular color uniformity (ACU) of light-emitting diode (LED) packaging. In …

In light-emitting diode (LED) applications, it is becoming a big issue that how to optimize
light intensity distribution curve (LIDC) and design corresponding optical component to …

In this study, we proposed an effective optical design method to solve the problem of
prescribed illuminance for LED chip array packaging (LCAP). With this method, light energy …

In this paper, a construction method through forward and reverse ray tracing for a design of
ultra-wide linear field-of-view (FOV) off-axis freeform systems is proposed. The freeform …

The freeform optical system plays a key role in illumination engineering, and several
methods have been reported to manage the design of such system. In this paper, an …

A method is presented for the fast design of a smooth freeform lens to tailor a collimated light
beam with an arbitrary contour. This method begins by calculating an initial surface based …