光谱学与光谱分析
光譜學與光譜分析
광보학여광보분석
SPECTROSCOPY AND SPECTRAL ANALYSIS
2014年
6期
1702-1706
,共5页
宽波段光源%光谱线性拟合%光源光强波动%补偿方法
寬波段光源%光譜線性擬閤%光源光彊波動%補償方法
관파단광원%광보선성의합%광원광강파동%보상방법
Broadband illuminant%Spectrum linear fitting%Illuminant intensity fluctuation%Compensation method
宽波段光源在工作过程中，光强通常会随供电电源输出功率的变化而波动。宽波段光源波段内各个波长的光谱强度将会发生不同程度的波动。为解决光源光强波动时其波段内各个波长光谱强度的补偿问题，提出了一种基于光谱线性拟合的补偿方法。使用这种方法，只需测量光源波段光强的变化，就可以补偿各个波长光谱强度的波动。通过分析理想黑体全波段辐射出射度与光谱辐射出射度的近似线性关系。建立了宽波段光源波段光强与光谱强度的线性模型。实验装置主要由卤素灯珠、光源电源、光阑、光谱仪及计算机构成。调节电源的输出功率，得到一组卤素灯珠在不同输入功率下的相对光谱强度。测量不同功率下卤素灯珠光谱强度来验证该方法补偿效果。按线性关系拟合了卤素灯珠光谱强度与其波段光强关系式，并分析了拟合误差。实验表明：卤素灯珠的光谱强度与其波段光强具有很好的线性关系，可以用波段光强按线性关系来补偿其光谱强度的波动。随着卤素灯珠输入功率的增大，补偿后的光谱强度的相对误差绝对值下降。在卤素灯珠输入功率范围内，使用该方法补偿的光谱强度在绝大部分（92％）波长下相对误差绝对值可在5％以内。
寬波段光源在工作過程中，光彊通常會隨供電電源輸齣功率的變化而波動。寬波段光源波段內各箇波長的光譜彊度將會髮生不同程度的波動。為解決光源光彊波動時其波段內各箇波長光譜彊度的補償問題，提齣瞭一種基于光譜線性擬閤的補償方法。使用這種方法，隻需測量光源波段光彊的變化，就可以補償各箇波長光譜彊度的波動。通過分析理想黑體全波段輻射齣射度與光譜輻射齣射度的近似線性關繫。建立瞭寬波段光源波段光彊與光譜彊度的線性模型。實驗裝置主要由滷素燈珠、光源電源、光闌、光譜儀及計算機構成。調節電源的輸齣功率，得到一組滷素燈珠在不同輸入功率下的相對光譜彊度。測量不同功率下滷素燈珠光譜彊度來驗證該方法補償效果。按線性關繫擬閤瞭滷素燈珠光譜彊度與其波段光彊關繫式，併分析瞭擬閤誤差。實驗錶明：滷素燈珠的光譜彊度與其波段光彊具有很好的線性關繫，可以用波段光彊按線性關繫來補償其光譜彊度的波動。隨著滷素燈珠輸入功率的增大，補償後的光譜彊度的相對誤差絕對值下降。在滷素燈珠輸入功率範圍內，使用該方法補償的光譜彊度在絕大部分（92％）波長下相對誤差絕對值可在5％以內。
관파단광원재공작과정중，광강통상회수공전전원수출공솔적변화이파동。관파단광원파단내각개파장적광보강도장회발생불동정도적파동。위해결광원광강파동시기파단내각개파장광보강도적보상문제，제출료일충기우광보선성의합적보상방법。사용저충방법，지수측량광원파단광강적변화，취가이보상각개파장광보강도적파동。통과분석이상흑체전파단복사출사도여광보복사출사도적근사선성관계。건립료관파단광원파단광강여광보강도적선성모형。실험장치주요유서소등주、광원전원、광란、광보의급계산궤구성。조절전원적수출공솔，득도일조서소등주재불동수입공솔하적상대광보강도。측량불동공솔하서소등주광보강도래험증해방법보상효과。안선성관계의합료서소등주광보강도여기파단광강관계식，병분석료의합오차。실험표명：서소등주적광보강도여기파단광강구유흔호적선성관계，가이용파단광강안선성관계래보상기광보강도적파동。수착서소등주수입공솔적증대，보상후적광보강도적상대오차절대치하강。재서소등주수입공솔범위내，사용해방법보상적광보강도재절대부분（92％）파장하상대오차절대치가재5％이내。
The intensity of broadband illuminant fluctuates when its power supply output power changes.Spectral intensities at each wavelength within the band of broadband illuminant fluctuate at different levels.A method based on spectrum linear fitting is proposed to compensate the illuminant spectral intensity in its band when its intensity fluctuates.The spectral intensity fluctu-ation at each wavelength could be compensated simply by measuring the band intensity with this method.The linear relationship between spectral radiant exitance and whole radiant exitance of ideal blackbody was analysed by researching the radiant exitance at different temperatures.The linear model of broadband illuminant band intensity and spectral intensity was built.Experimental system is composed of a halogen light,a power supply,an aperture,a spectrometer,and a computer mainly.By adjusting the power output of the power supply,we obtained a set of halogen light relative spectral intensities at different power inputs.The spectral intensity of halogen light at different input powers was measured to test the compensation effect of this method.The re-lationship between spectral intensity and band intensity of halogen light was fitted with linear relation and the fitting errors were analysed.The experimental result shows a linear relationship between spectral intensity and band intensity of halogen light,so the spectral intensity fluctuation can be compensated using the band intensity according to their linear relation.The relative error absolute value of compensated spectral intensity decreases as the halogen light input power increases.Within the range of halogen light input power,the relative error absolute values of spectral intensity compensated with this method are within 5%at vast ma-jority (92%)of the wavelengths.
