Optical design of color light-emitting diode ring light for machine vision inspection

Dong, Jingtao; Lu, Rongsheng; Shi, Yan-qiong; Xia, Ruixue; Li, Qi; Xu, Yan

doi:10.1117/1.3567053

Cited by 32 publications

(24 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The design equations and formulas are adopted and derived geometrically from the design equations for a circular ring array of four LEDs at 0-deg illumination. 27,28 A potentiometer is employed to control the brightness of the LEDs. The probe is coupled to a video processing unit, which is in turn linked to a personal computer for display and/or storage.…”

Section: Imaging Systemmentioning

confidence: 99%

Preclinical imaging of iridocorneal angle and fundus using a modified integrated flexible handheld probe

et al. 2017

View full text Add to dashboard Cite

Abstract. A flexible handheld imaging probe consisting of a 3 mm × 3 mm charge-coupled device camera, lightemitting diode light sources, and near-infrared laser source is designed and developed. The imaging probe is designed with specifications to capture the iridocorneal angle images and posterior segment images. Light propagation from the anterior chamber of the eye to the exterior is considered analytically using Snell's law. Imaging of the iridocorneal angle region and fundus is performed on ex vivo porcine samples and subsequently on small laboratory animals, such as the New Zealand white rabbit and nonhuman primate, in vivo. The integrated flexible handheld probe demonstrates high repeatability in iridocorneal angle and fundus documentation. The proposed concept and methodology are expected to find potential application in the diagnosis, prognosis, and management of glaucoma.

show abstract

Section: Imaging Systemmentioning

confidence: 99%

Preclinical imaging of iridocorneal angle and fundus using a modified integrated flexible handheld probe

et al. 2017

View full text Add to dashboard Cite

show abstract

“…It highlighted the significance of the subjective criterion on the development of an illumination system. Dong et al [6] applied the simulation technique to design the LED lighting with the uniform irradiance for the proper optical design. Audenaert et al [7] performed the parametric study to assess the impact of important input parameters on the accuracy of the ray tracing simulation results such as the bidirectional reflectance distribution function (BRDF).…”

Section: Open Accessmentioning

confidence: 99%

Window Material Daylighting Performance Assessment Algorithm: Comparing Radiosity and Split-Flux Methods

Yoon

Jeong

2014

Energies

View full text Add to dashboard Cite

Abstract:Windows are the primary aperture to introduce solar radiation to the interior space of a building. This experiment explores the use of EnergyPlus software for analyzing the illuminance level on the floor of a room with reference to its distance from the window. For this experiment, a double clear glass window has been used. The preliminary modelling in EnergyPlus showed a consistent result with the experimentally monitored data in real time. EnergyPlus has two mainly used daylighting algorithms: DElight method employing radiosity technique and Detailed method employing split-flux technique. Further analysis for illuminance using DElight and Detailed methods showed significant difference in the results. Finally, we compared the algorithms of the two analysis methods in EnergyPlus.

show abstract

“…Quite a few detailed and comparative studies have been carried out of these methods. Dong et al [4] applied the simulation technique to design the LED lighting with the uniform irradiance for the proper optical design. Audenaert et al [5] performed the parametric study to assess the impact of important input parameters on the accuracy of the ray tracing simulation results such as the bidirectional reflectance distribution function (BRDF).…”

Section: Background and Purposementioning

confidence: 99%

Comparative Study of Two Daylighting Analysis Methods with Regard to Window Orientation and Interior Wall Reflectance

Yoon

Manandhar

2014

Energies

View full text Add to dashboard Cite

Abstract:The accuracy and speed of the daylighting analysis developed for use in EnergyPlus is better than its predecessors. In EnergyPlus, the detailed method uses the Split-flux algorithm whereas the DElight method uses the Radiosity algorithm. Many existing studies have addressed the two methods, either individually or compared with other daylight analysis methods like Ray tracing but still there is lack of detailed comparative study of these two methods. Our previous studies show that the Split-flux method overestimates the illuminance, especially for the areas away from the window. The Radiosity method has the advantage of accurately predicting this illuminance because of how it deals with the diffuse light. For this study, the EnergyPlus model, which has been calibrated using data measured in a real building in previous studies, has also been used. The calibrated model has a south oriented window only. This model is then used to analyze the interior illuminance inside the room for north, west and east orientation of the window by rotating the model and by changing the wall reflectance of the model with south oriented window. Direct and diffuse component of the illuminance as well as the algorithms have been compared for a detailed analysis.

show abstract

Optical design of color light-emitting diode ring light for machine vision inspection

Cited by 32 publications

References 15 publications

Preclinical imaging of iridocorneal angle and fundus using a modified integrated flexible handheld probe

Preclinical imaging of iridocorneal angle and fundus using a modified integrated flexible handheld probe

Window Material Daylighting Performance Assessment Algorithm: Comparing Radiosity and Split-Flux Methods

Comparative Study of Two Daylighting Analysis Methods with Regard to Window Orientation and Interior Wall Reflectance

Contact Info

Product

Resources

About