標題: The Surveillance Transceiver Module Design for Improvement of Irradiance Coverage and Image Grayscale Quality
作者: Lee, Hsiao-Wen
Lin, Bor-Shyh
光電系統研究所
影像與生醫光電研究所
Institute of Photonic System
Institute of Imaging and Biomedical Photonics
公開日期: 1-Feb-2019
摘要: Night image quality is gradually emphasized in surveillance industry in past years, and the requirement for the night image definition standards is enhanced. A traditional flashlight-like circularly symmetric light is gradually not suitable for the industry, and the optical design equipped secondary optical elements also encounters the difficulty in space restriction. Package lenses are used for the optical design in this study, mainly replacing the functions of secondary optics and solve the restriction of inadequate internal space of a camera. Meanwhile, the light design of a light-emitting module is proceeded to match the characteristic of a camera image capturing 4:3 or 16:9. Radiant coverage and irradiance efficiency are two parameters to judge the light quality. A new design, under the irradiance efficiency 100%, could enhance the original radiant coverage from 0.366 to 0.825, increasing up to 2.25 times. Besides, the image irradiance uniformity also increases from 0.47 to 0.714, with the increase up to 1.52 times. The package lens design is gradually accepted by international surveillance manufacturers.
URI: http://dx.doi.org/10.1109/JPHOT.2019.2893263
http://hdl.handle.net/11536/148844
ISSN: 1943-0655
DOI: 10.1109/JPHOT.2019.2893263
期刊: IEEE PHOTONICS JOURNAL
Volume: 11
Appears in Collections:Articles