中国科学院机构知识库网格系统: 检索

浏览/检索结果: 共5条，第1-5条

帮助

条数/页：排序方式：
	Tunable output-frequency filter algorithm for imaging through scattering media under LED illumination 期刊论文 OAI收割 OPTICS COMMUNICATIONS, 2018, 卷号: 410, 页码: 160-163 作者: Zhou, Meiling; Singh, Alok Kumar; Pedrini, Giancarlo; Osten, Wolfgang; Min, Junwei \| 收藏 \| 浏览/下载：33/0 \| 提交时间：2018/12/12 Tunable Output-frequency Filter Algorithm Experimental Noise Speckle Imaging Led Illumination
	Visualization of the 3D structures of small organisms via LED-SIM 期刊论文 OAI收割 frontiers in zoology, 2016, 卷号: 13 作者: Ruan, Yongying; Dan, Dan; Zhang, Mengna; Bai, Ming; Lei, Ming 收藏 \| 浏览/下载：27/0 \| 提交时间：2016/09/23 3D imaging Micro-structures Structured illumination microscopy LED illumination Microscopy Morphology
	LED optical engine based on rectangular CPC for micro-projection display (EI CONFERENCE) 会议论文 OAI收割 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, November 19, 2008 - November 21, 2008, Chengdu, China 作者: Meng Z.; Meng Z. 收藏 \| 浏览/下载：18/0 \| 提交时间：2013/03/25 With applications in digital display consumer electronics medicine automotive lighting traffic signals and general illumination the light-emitting diode (LED) is the world's most efficient light source being mass produced today[1]. However high cost is the main factor restricting widespread application of LED lighting and the packaging is the most expensive aspect of LED products. Light emitting diodes (LED) are regarded as the most important light sources in solid-state lighting for their advantages in energy efficiency long life vivid colors high reliability environmental protection safety and multiple applications. However application of LEDs in projection display exist many questions such as low illuminance uniformity and low energy efficiency by reason of luminescence distribution and constructure specificity for LED the study on application of LED in the micro-projection display and projection display is reported[2-8]. Considering the question mensioned above the rectangular CPC(Compound Parabolic Concentrator) system with three-color LED is applied in the projection display. 2009 SPIE.
	Study on chromaticity balance for LED exposure system (EI CONFERENCE) 会议论文 OAI收割 International Symposium on Photoelectronic Detection and Imaging 2007 - Laser, Ultraviolet, and Terahertz Technology, September 9, 2007 - September 12, 2007, Beijing, China 作者: Meng Z.; Meng Z. 收藏 \| 浏览/下载：16/0 \| 提交时间：2013/03/25 A standard white light compounding algorithm based on combination of CCD illumination acquisition with computer control is presented for LEDs. The computer adjust and control the working current of LEDs by using three-color LEDs illumination acquired by CCD camera achieved chromaticity coordinates error between compounded white light and standard white light D65 less than the threshold beforehand setted by this technique then acquiring needed standard white light. Compounded white light meet the chromaticity error demand that is able to be changed at the same time the CCD illumination acquisition system is eliminated. The proposed algorithm improved the light energy utilization efficiency of LED and eliminated the offset of central wavelength and chromaticity coordinates due to work current change of LEDs. Experimental results show that the proposed algorithm achieved lesser chromaticity error uv=0.001 relative to standard white light D65 enhanced chromaticity uniformity of illumination field.
	Study on chroma balance based on grating spectrometer for LED (EI CONFERENCE) 会议论文 OAI收割 Light-Emitting Diode Materials and Devices II, November 12, 2007 - November 14, 2007, Beijing, China 作者: Meng Z.; Meng Z. 收藏 \| 浏览/下载：22/0 \| 提交时间：2013/03/25 A standard white light compounding algorithm based on combination of choma coordinates acquisition system with computer working current control system is presented for three-color LED. The chroma coordinates acquisition system consist of grating spectrometer and integrating sphere. The computer adjust and control the working current of three-color LED then achieved chroma coordinates error between the compounded white light and standard white light D65 until the chroma coordinates is less than the threshold beforehand set by this technique. The compounded white light meet the chroma error demanded that is able to be changed at the same time the chroma coordinates acquisition system and the working current control system are eliminated. The proposed algorithm the offset of central wavelength and the change of chroma coordinates due to working current variety for LEDs. Experimental results show that the proposed algorithm achieved lesser chroma error uv=0.001 relative to standard white light D65 enhanced chroma uniformity of illumination field.