消费级相机可见光光谱仪及应用
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摘要
利用相机将光信号转化为数字信号的原理,设计了一款由消费级RGB相机、透射光栅、暗盒组成的可见光光谱仪。通过让相机拍摄静态场景多曝光时间下的数张照片,根据同像素坐标下不同曝光时间图片中的像素值,应用最小二乘法拟合获取相机的亮度响应曲线,从而得到像素值和相对辐射强度的对应关系。然后用RGB相机拍摄被透射光栅分光后的测试光源的光谱图,根据推导出的亮度响应曲线得到光谱图上像素的相对辐射强度值,从而模拟出测试光源可见光范围的光谱分布。用设计的光谱仪模拟了LED光源的可见光光谱分布,并且用于检测LED光源的蓝光含量。
A visible light spectrometer consisting of consumer-grade RGB camera,transmission grating,and cassette is designed by using the principle of converting optical signals into digital signals. During its working process,the relationship between the pixel values and the relative radiation intensity is obtained based on the camera brightness response curve. The curve is depicted by taking several photos in the static scene under multiple exposure times,and utilizing the least squares fitting method the pixel values in the photos are analyzed under the same pixel coordinates.Then,the spectrum of the test light source,which is split by the transmission grating,is taken by the RGB camera,and the relative radiation intensity value of the pixel on the spectrum is acquired according to the derived brightness response curve. The visible light range of the test light source could be deduced according to the relative radiation intensity value.Finally,the visible light spectrum distribution of the LED light source is simulated with the novel-designed spectrometer and used to detect the component of blue light in LED light source.
A visible light spectrometer consisting of consumer-grade RGB camera,transmission grating,and cassette is designed by using the principle of converting optical signals into digital signals. During its working process,the relationship between the pixel values and the relative radiation intensity is obtained based on the camera brightness response curve. The curve is depicted by taking several photos in the static scene under multiple exposure times,and utilizing the least squares fitting method the pixel values in the photos are analyzed under the same pixel coordinates.Then,the spectrum of the test light source,which is split by the transmission grating,is taken by the RGB camera,and the relative radiation intensity value of the pixel on the spectrum is acquired according to the derived brightness response curve. The visible light range of the test light source could be deduced according to the relative radiation intensity value.Finally,the visible light spectrum distribution of the LED light source is simulated with the novel-designed spectrometer and used to detect the component of blue light in LED light source.
引文
[1]何建波,朱燕舞.紫外-可见光谱技术在化学研究中的应用[J].实验室研究与探索,2012(11):28-34.
[2]狄伶,何琳.鸡蛋外壳膜的拉曼光谱观察[J].实验室研究与探索,2012(10):296-298.
[3]薛科社.高效液相光谱荧光检测在线光谱扫描技术及在环境样品分析中的应用[J].实验室研究与探索,2002(S1):62-63.
[4]罗宁宁,张志敏.柔性薄膜光栅数字化制作及光谱检测应用[J].实验室研究与探索,2016(9):24-27.
[5]王军,王振亚,陈宝华,等.简易手机光谱仪的设计及应用[J].实验室研究与探索,2018(2):87-89.
[6]徐美嘉,王海林,谭伟石.斜入射时光栅衍射特性的理论分析及实验研究[J].大学物理实验,2014(4):34-37.
[7] Schlyter P. Radiometry and photometry in astronomy[EB/OL].(2017-03-05)[2018-07-09]. http://stjarnhimlen. se/comp/radfaq. html
[8]丁绪星,朱日宏,李建欣.一种基于人眼视觉特性的图像质量评价[J].中国图象图形学报,2004,9(2):190-194.
[9] Debevec P E,Malik J. Recovering high dynamic range radiance maps from photographs[J]. Conference on Computer Graphics&Interactive Techniques,1997,97:369-378.
[10]王慧文.偏最小二乘回归方法及其应用[M].北京:国防工业出版社,1999.
[11]李刚,魏计林.强椒盐噪声彩色图像的改进矢量中值滤波算法[J].计算机与数字工程,2011,39(10):157-160.
[12]崔元日.颜色再现的研究现状[J].照明工程学报,1994(3):41-47.
[13]大谷义彦,夏晨. LED照明现状与未来展望[J].中国照明电器,2007(6):22-26.
[14] Steranka F M,Bhat J, Collins D, et al. High power LEDstechnology status and market applications[J]. Phys Stat Sol,2002,194(2):380-388.
[15]周李兵,朱瑜,吴浪,等.家用光源有害蓝光的测试[J].实验室研究和探索,2016(10):33-35.
[16]牟丽霞,杨春霞,叶祥平,等. LED灯光生物安全性比对结果分析[J].照明工程学报,2016(5):9-12.
[2]狄伶,何琳.鸡蛋外壳膜的拉曼光谱观察[J].实验室研究与探索,2012(10):296-298.
[3]薛科社.高效液相光谱荧光检测在线光谱扫描技术及在环境样品分析中的应用[J].实验室研究与探索,2002(S1):62-63.
[4]罗宁宁,张志敏.柔性薄膜光栅数字化制作及光谱检测应用[J].实验室研究与探索,2016(9):24-27.
[5]王军,王振亚,陈宝华,等.简易手机光谱仪的设计及应用[J].实验室研究与探索,2018(2):87-89.
[6]徐美嘉,王海林,谭伟石.斜入射时光栅衍射特性的理论分析及实验研究[J].大学物理实验,2014(4):34-37.
[7] Schlyter P. Radiometry and photometry in astronomy[EB/OL].(2017-03-05)[2018-07-09]. http://stjarnhimlen. se/comp/radfaq. html
[8]丁绪星,朱日宏,李建欣.一种基于人眼视觉特性的图像质量评价[J].中国图象图形学报,2004,9(2):190-194.
[9] Debevec P E,Malik J. Recovering high dynamic range radiance maps from photographs[J]. Conference on Computer Graphics&Interactive Techniques,1997,97:369-378.
[10]王慧文.偏最小二乘回归方法及其应用[M].北京:国防工业出版社,1999.
[11]李刚,魏计林.强椒盐噪声彩色图像的改进矢量中值滤波算法[J].计算机与数字工程,2011,39(10):157-160.
[12]崔元日.颜色再现的研究现状[J].照明工程学报,1994(3):41-47.
[13]大谷义彦,夏晨. LED照明现状与未来展望[J].中国照明电器,2007(6):22-26.
[14] Steranka F M,Bhat J, Collins D, et al. High power LEDstechnology status and market applications[J]. Phys Stat Sol,2002,194(2):380-388.
[15]周李兵,朱瑜,吴浪,等.家用光源有害蓝光的测试[J].实验室研究和探索,2016(10):33-35.
[16]牟丽霞,杨春霞,叶祥平,等. LED灯光生物安全性比对结果分析[J].照明工程学报,2016(5):9-12.