| Lens design of LED searchlight of high brightness and distant spot. | |
| | |
MedLine Citation:
|
PMID: 21532693 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
|
The study related in this paper is the design of a ship-mounted LED of high brightness and distant spot. The freeform lens design obeying the edge ray principle and Snell's law is presented first. Then, to fit the illumination requirement of the searchlight, we designed a freeform lens to collimate all the light rays coming from the LED. However, theoretical analysis proves that there is a critical angle for incident rays beyond which the rays cannot be collimated, and 55% is the light-efficiency limit for polymethyl methacrylate freeform lens. We then designed a combination of a freeform lens-coupled parabolic reflector that improved light efficiency to 70%. In this paper, the design of the freeform lens-coupled parabolic reflector is given in detail. In addition, tolerance analysis and the effect of manufacturing defect are presented. |
| | |
Authors:
|
Shuang Zhao; Kai Wang; Fei Chen; Dan Wu; Sheng Liu |
Related Documents
:
|
19302343 - How does the pitch and pattern of a signal affect auditory arousal thresholds? 19355263 - "rivers" of sound in cuvier's beaked whale (ziphius cavirostris): implications for the ... 10173063 - Spatial perception during laparoscopy: implementing action-perception coupling. |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Journal of the Optical Society of America. A, Optics, image science, and vision Volume: 28 ISSN: 1520-8532 ISO Abbreviation: J Opt Soc Am A Opt Image Sci Vis Publication Date: 2011 May |
Date Detail:
|
Created Date: 2011-05-02 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 9800943 Medline TA: J Opt Soc Am A Opt Image Sci Vis Country: United States |
Other Details:
|
Languages: eng Pagination: 815-20 Citation Subset: IM |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Analysis of digital images into energy-angular momentum modes.
Next Document: Multinodal fifth-order optical aberrations of optical systems without rotational symmetry: the astig...