Multiple chips are often bonded in a small single package of LED to obtain higher light flux output. However, the nonuniformity of light pattern always exists due to the high order collimating lamp, which uses the MCLED (Multi-chips LED) as the source. In this paper, the light pattern uniformity of lamp composed of four-in-one MCLED, whose thickness of phosphor layer and the length of lamp are respectively 0.1 mm and 10 mm, is simulated and analyzed. The ray tracing simulated by computer with varying the spacing of chips, concentration of phosphor, shape of lamp, and the corresponding uniformity of light pattern will be analyzed and discussed in detail.

Date Published: 25 September 2014
PDF: 7 pages
Proc. SPIE 9192, Current Developments in Lens Design and Optical Engineering XV, 91921B (25 September 2014); doi: 10.1117/12.2061552

Published in SPIE Proceedings Vol. 9192:
Current Developments in Lens Design and Optical Engineering XV
R. Barry Johnson; Virendra N. Mahajan; Simon Thibault, Editor(s)