新型长余辉稀土发光材料发光特性探讨

本文对新型长余辉稀土发光材料在不同照度 ,不同激发时间等多种条件下的发光特性进行了检测 ,并对检测结果进行了分析讨论。     

浅谈南坪快速路道路照明设计

通过南坪快速路道路照明设计实例，介绍快速路道路照明设计方法和主要内容。     

商场照明设计中几点节电措施

我国照明用电量占全国发电总量的12％左右,节约照明用电不仅减轻国家电力供应的压力,而且还保护了环境。大、中型商场照明用电量一般都很大,设计商场时,怎样才能做到投产后节约电能,通过多年设计实践总结出几点措施。     

Effects of surrounding brightness on visual search for safety colors

The present article reports the investigation of the effects of surrounding brightness on a visual search for three safety colors: red, orange, and yellow. Images of visual stimuli consisting of an array of colored circles placed on a large visual field (a visual angle of 40°) were displayed on an 80‐in. screen with a DLP projector. Experiment I examined the search efficiency under three levels of background luminance that were equivalent to the three target luminances. The results showed that the search efficiency for the orange target decreased as the number of distractors increased, under each of the background luminance levels, whereas the efficiency scarcely decreased for the red and yellow targets. Although a reduction in background luminance increased the search efficiency for the orange target, it is suggested that the effect of background luminance is smaller than the effect of the target color in search efficiency. Experiment II examined the search efficiency under three conditions of low levels of incident illuminance, which were matched with a linear regression to the luminance of color chips of safety colors measured twilight conditions. The results showed that the search efficiency for the orange target decreased as the number of distractors increased under each of the different illuminance conditions, whereas the efficiency scarcely decreased for red and yellow targets. Furthermore, as illuminance decreased, the search time for the orange target was more greatly impacted than for red or yellow. These results imply that the recognition of orange tends to be influenced by the surrounding brightness. © 2005 Wiley Periodicals, Inc. Col Res Appl, 30, 400–409, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/col.20152     

Visual recognition efficiency of handheld infrared thermometer interface information under low ambient illuminance

One of the symptoms of plagues, epidemics or pandemics is often a fever, so during such unprecedented times, handheld infrared thermometers are vital devices for monitoring symptomatic individuals. It is therefore very important to enhance reading efficiency when these thermometers are used for lengthy periods of time in a low illuminance environment. The need for the efficient reading of infrared thermometers or a fast reaction time when reading the information is even more relevant now during the COVID-19 pandemic. In this study, a target search experiment of digital characters is carried out through a simulated interface and use scenarios of a handheld thermometer based on three variables: the inclination angle or slant of the seven segment display characters, screen brightness, and ambient illuminance. The experimental results show that the inclination angle or slant of the characters and ambient illuminance have a significant effect on the reaction speed. In general, the slowest reaction time is found when reading characters with a slant of 10° to the left and the reaction time is the fastest with a right slant of 20°. A continued reduction in ambient illuminance does not affect the visual recognition performance but instead further enhances reading efficiency. Increasing the screen brightness increases the reaction time more in relatively low ambient illuminance conditions as opposed to relatively high ambient illuminance, which implies that in higher ambient illuminance conditions, a brighter screen needs to be used to obtain the same reaction speed as that in lower ambient illuminance conditions.     

水下微光高速摄像照明技术的研究与应用

为了实现水下微光高速摄像系统最佳的成像效果,本文首先深入分析了水下30-40米左右微光条件下高灵敏度高速摄像机的物方和像方的光照度需求,进而设计出合适的辅助照明方案,然后通过实验分析了照射方向与摄像机拍摄方向的角度以及照明灯的发光强度对成像质量的影响。上述分析和实验结果达到了全系统在6米左右清晰成像的基本要求。     

一种多功能照度计的设计

基于数字照度传感器BH1750实现了一种多功能照度计GZ-100,除照度测量功能外,还具有温湿度测量与无线通信功能。系统采用低电压的STC12LE5A60S2单片机,抗干扰能力强、应用电路最简单的射频收发芯片IA4420,数字照度传感器BH1750和温湿度传感器SHT11。系统根据IA4420内部状态寄存器的值借助外部中断收发数据,以74HC164驱动4个共阴极数码管的动态方法进行显示。最后进行了照度的对比测量,结果显示GZ-100能够满足一般的照度测量要求。     

老年人住宅照明光环境

本文探讨了老年人视觉特性,分析了老年人居住实态的照明光环境状况,进而从视觉生理与视觉心理影响因素出发,对住宅中老年人居住房间室内照明光环境照度和设计方法进行了研究。     

基于智能手持设备的光照度计虚拟实验程序的设计与实践

为了降低传统桌面虚拟实验系统对场地、设备的需求,克服光照度计计量教学资源短缺的现状,设计并实现了基于智能手持设备的光照度计计量虚拟实验程序以满足光照度计计量教学的需要。以智能手持设备为载体,采用Multi Gen Creator软件进行实时场景建模,依托Unity 3D软件为开发平台,采用C#脚本语言来完成已建立的3D模型和场景的交互与编辑,通过Vuforia软件实现了增强现实功能。实验证明:该程序优化了教学资源,能够很好地满足光照度计计量教学的需要。     

浅谈照明在室内设计中的运用

光,明亮的、愉悦的、活跃的。光振奋人的精神,使我们心理上感到满足。人类的生活与光息息相关。光是生命的源泉,是人居住环境的要素,创造明亮、舒适、优美的光环境是建筑师、规划师、室内设计师们义不容辞的责任。光是一种语言,向我们述说设计师的设计理念和艺术追求;光是隐形的软件,控制着城市和建筑的功能运作及形象和色彩的演现;光是设计工具,也是建筑材料,设计师可以用它编绘理想,展示才华。