光伏型紅外TDI陣列碲鎘汞探測器的串?dāng)_機(jī)制研究
發(fā)布時(shí)間：2018-11-08 16:09
【摘要】：在紅外成像系統(tǒng)中,串?dāng)_會降低圖像質(zhì)量,因此對串?dāng)_的測試及產(chǎn)生機(jī)理等研究至關(guān)重要。論文以新一代紅外TDI陣列碲鎘汞探測器作為研究對象,從實(shí)驗(yàn)和理論兩個(gè)方面,系統(tǒng)研究了光致串?dāng)_的產(chǎn)生機(jī)制,研究結(jié)果具有前沿性和重要的學(xué)術(shù)價(jià)值。論文首先從理論上對比研究了陣列型探測器件串?dāng)_效應(yīng)的兩種產(chǎn)生機(jī)理、三種測試原理和測試方法,分別從光的反射、折射、散射、目標(biāo)光點(diǎn)的衍射和光學(xué)系統(tǒng)的像差五個(gè)方面系統(tǒng)揭示了光學(xué)串?dāng)_的產(chǎn)生機(jī)理;從載流子特征參數(shù)、載流子的輻射復(fù)合、表面溝道、光敏元和處理電路設(shè)計(jì)五個(gè)方面系統(tǒng)揭示了電學(xué)串?dāng)_的產(chǎn)生機(jī)理;從器件的結(jié)構(gòu)設(shè)計(jì)、工藝提升、算法優(yōu)化三個(gè)方面詳細(xì)地闡明了光學(xué)串?dāng)_的解決方案;從結(jié)構(gòu)設(shè)計(jì)、工藝提升和電路技術(shù)三個(gè)方面詳細(xì)地闡明了電學(xué)串?dāng)_的解決方案。在上述研究的基礎(chǔ)上,針對紅外TDI陣列碲鎘汞探測器,分別研究了波段內(nèi)和峰值響應(yīng)波段外光致串?dāng)_的產(chǎn)生機(jī)制,揭示了該類器件光致串?dāng)_大小與入射光波長、入射光功率密度、入射光體制(連續(xù)和脈沖)的關(guān)系以及同一輻照通道各個(gè)探測單元間與不同通道各個(gè)探測單元間的串?dāng)_特性。主要研究結(jié)論如下:1.實(shí)驗(yàn)發(fā)現(xiàn),當(dāng)入射光功率密度達(dá)到一定程度時(shí),無論是3800 nm波段內(nèi)的連續(xù)光還是1064 nm峰值響應(yīng)波段外的連續(xù)光,TDI探測器同一輻照通道各個(gè)探測單元間、不同通道各個(gè)探測單元間均會出現(xiàn)串?dāng)_,串?dāng)_程度均隨入射光功率密度的增加而增大,最終探測單元可全部達(dá)到飽和;但當(dāng)入射光功率密度相同時(shí),波段內(nèi)探測器的串?dāng)_程度大于峰值響應(yīng)波段外的。2.當(dāng)波段內(nèi)連續(xù)入射光功率密度在3.0 W/cm~2~9.8×10~2 W/cm~2范圍時(shí),輻照通道串?dāng)_單元數(shù)N與入射激光功率密度P的雙對數(shù)坐標(biāo)曲線存在近似線性關(guān)系,且該曲線的斜率為0.36;未被輻照通道串?dāng)_單元數(shù)N與入射激光功率密度P的雙對數(shù)坐標(biāo)也存在近似線性關(guān)系,且該曲線的斜率為0.46。研究表明,由高階衍射效應(yīng)引起的光學(xué)串?dāng)_是同一輻照通道各個(gè)探測單元間串?dāng)_的主要來源,而不同通道各個(gè)探測單元間串?dāng)_的主要來源則是由于載流子的運(yùn)動所引發(fā)的電學(xué)串?dāng)_。3.與波段內(nèi)電壓響應(yīng)輸出結(jié)果類似,當(dāng)峰值響應(yīng)波段外連續(xù)入射光功率密度在0.8 W/cm~2~1.9×10~2 W/cm~2范圍時(shí),輻照通道串?dāng)_單元數(shù)N與入射激光功率密度P的雙對數(shù)坐標(biāo)曲線存在近似線性關(guān)系,且該曲線的斜率為0.39;未輻照通道串?dāng)_單元數(shù)N與入射激光功率密度P的雙對數(shù)坐標(biāo)也存在近似線性關(guān)系,且該曲線的斜率為0.51。研究表明,由高階衍射效應(yīng)引起的光學(xué)串?dāng)_是同一輻照通道各個(gè)探測單元間串?dāng)_的主要來源;不同通道各個(gè)探測單元間串?dāng)_的主要來源則是由于載流子的運(yùn)動所引發(fā)的電學(xué)串?dāng)_。4.實(shí)驗(yàn)發(fā)現(xiàn),當(dāng)?shù)椭仡l脈沖光輻照TDI陣列碲鎘汞探測器時(shí),探測器出現(xiàn)了不同于連續(xù)光的對稱分布響應(yīng)新現(xiàn)象,即電壓響應(yīng)輸出曲線存在一個(gè)對稱中心,以該中心為軸,響應(yīng)曲線左右兩邊的輸出電壓呈180度鏡像的對稱分布。研究表明低重頻脈沖激光導(dǎo)致入射光時(shí)刻與探測器積分周期失配產(chǎn)生對稱響應(yīng)分布。
[Abstract]:In the infrared imaging system, the crosstalk can reduce the image quality, so it is very important to study the test of the crosstalk and the mechanism of the generation. In this paper, a new generation of infrared TDI array is used as the research object, and from the two aspects of the experiment and the theory, the mechanism of the light-induced crosstalk is studied, and the research results have the leading edge and the important academic value. In this paper, the two generation mechanisms, three test principles and test methods of the crosstalk effect of the array-type detector are studied theoretically, and the reflection, refraction and scattering of the light are respectively calculated from the light reflection, refraction and scattering. The system of the five aspects of the diffraction of the target spot and the aberration of the optical system reveals the mechanism of the generation of the optical crosstalk, and the generation mechanism of the disturbance of the electrical string is revealed from the carrier characteristic parameters, the radiation recombination of the carriers, the surface channel, the photosensitive element and the processing circuit design. The solution of optical crosstalk is described in detail from the three aspects of structure design, process improvement and algorithm optimization of the device, and the solution of electrical crosstalk is explained in detail from the three aspects of structural design, process improvement and circuit technology. On the basis of the above-mentioned research, the generation mechanism of the external light-induced crosstalk in the band and the peak-response band is studied for the infrared TDI array, and the magnitude of the light-induced crosstalk of the device and the incident light wavelength and the power density of the incident light are disclosed. The relationship between the incident light system (continuous and pulse) and the crosstalk characteristics between the individual detection units of the same irradiation channel and each of the detection units of different channels. The main findings are as follows: 1. The experiment shows that, when the power density of the incident light reaches a certain degree, the continuous light in the 3800 nm wavelength band or the continuous light outside the 1064nm peak response band, the TDI detector is in the same irradiation channel, the degree of crosstalk increases with the increase of the power density of the incident light, and the final detection unit can all reach saturation; however, when the power density of the incident light is the same, the crosstalk degree of the detector in the wave band is larger than that of the peak-response band. When the power density of the continuous incident light in the wave band is in the range of 3.0 W/ cm ~ 2 ~ 9. 8 and 10 ~ 2 W/ cm ~ 2, there is an approximate linear relationship between the number N of the irradiation channel and the double log curve of the incident laser power density P, and the slope of the curve is 0. 36; There is also an approximate linear relationship between the number of unirradiated channel crosstalk units N and the double logarithmic coordinates of the incident laser power density P, and the slope of the curve is 0.46. The results show that the optical crosstalk caused by the high order diffraction effect is the main source of the crosstalk among the detection units of the same irradiation channel, and the main source of the crosstalk among the various detection units of different channels is the electrical crosstalk caused by the movement of the carriers. Similar to the output of the voltage response in the band, when the power density of the continuous incident light in the peak-response band is in the range of 0.8 W/ cm-2-1. 9 and 10-2 W/ cm-2, there is an approximate linear relationship between the number N of the radiation channel crosstalk cell and the double log-log curve of the incident laser power density P, and the slope of the curve is 0.39; There is also an approximate linear relationship between the number N of the unirradiated channel and the double logarithmic coordinates of the incident laser power density P, and the slope of the curve is 0.51. The results show that the optical crosstalk caused by the high order diffraction effect is the main source of the crosstalk among the detection units of the same irradiation channel, and the main source of the crosstalk among the various detection units in different channels is the electrical crosstalk caused by the movement of the carriers. The experimental results show that the detector has a symmetrical distribution response to the continuous light when the low-heavy-frequency pulsed light is irradiated with the mercury detector of the TDI array, that is, there is a center of symmetry in the voltage response output curve, and the center is the axis. The output voltage on the left and right sides of the response curve is distributed at a symmetrical distribution of 180 degrees. The results show that the low-re-pulse laser causes a symmetrical response distribution to the mismatch of the incident light time and the detector integration period.
【學(xué)位授予單位】：國防科學(xué)技術(shù)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN215
本文編號：2318994
[Abstract]:In the infrared imaging system, the crosstalk can reduce the image quality, so it is very important to study the test of the crosstalk and the mechanism of the generation. In this paper, a new generation of infrared TDI array is used as the research object, and from the two aspects of the experiment and the theory, the mechanism of the light-induced crosstalk is studied, and the research results have the leading edge and the important academic value. In this paper, the two generation mechanisms, three test principles and test methods of the crosstalk effect of the array-type detector are studied theoretically, and the reflection, refraction and scattering of the light are respectively calculated from the light reflection, refraction and scattering. The system of the five aspects of the diffraction of the target spot and the aberration of the optical system reveals the mechanism of the generation of the optical crosstalk, and the generation mechanism of the disturbance of the electrical string is revealed from the carrier characteristic parameters, the radiation recombination of the carriers, the surface channel, the photosensitive element and the processing circuit design. The solution of optical crosstalk is described in detail from the three aspects of structure design, process improvement and algorithm optimization of the device, and the solution of electrical crosstalk is explained in detail from the three aspects of structural design, process improvement and circuit technology. On the basis of the above-mentioned research, the generation mechanism of the external light-induced crosstalk in the band and the peak-response band is studied for the infrared TDI array, and the magnitude of the light-induced crosstalk of the device and the incident light wavelength and the power density of the incident light are disclosed. The relationship between the incident light system (continuous and pulse) and the crosstalk characteristics between the individual detection units of the same irradiation channel and each of the detection units of different channels. The main findings are as follows: 1. The experiment shows that, when the power density of the incident light reaches a certain degree, the continuous light in the 3800 nm wavelength band or the continuous light outside the 1064nm peak response band, the TDI detector is in the same irradiation channel, the degree of crosstalk increases with the increase of the power density of the incident light, and the final detection unit can all reach saturation; however, when the power density of the incident light is the same, the crosstalk degree of the detector in the wave band is larger than that of the peak-response band. When the power density of the continuous incident light in the wave band is in the range of 3.0 W/ cm ~ 2 ~ 9. 8 and 10 ~ 2 W/ cm ~ 2, there is an approximate linear relationship between the number N of the irradiation channel and the double log curve of the incident laser power density P, and the slope of the curve is 0. 36; There is also an approximate linear relationship between the number of unirradiated channel crosstalk units N and the double logarithmic coordinates of the incident laser power density P, and the slope of the curve is 0.46. The results show that the optical crosstalk caused by the high order diffraction effect is the main source of the crosstalk among the detection units of the same irradiation channel, and the main source of the crosstalk among the various detection units of different channels is the electrical crosstalk caused by the movement of the carriers. Similar to the output of the voltage response in the band, when the power density of the continuous incident light in the peak-response band is in the range of 0.8 W/ cm-2-1. 9 and 10-2 W/ cm-2, there is an approximate linear relationship between the number N of the radiation channel crosstalk cell and the double log-log curve of the incident laser power density P, and the slope of the curve is 0.39; There is also an approximate linear relationship between the number N of the unirradiated channel and the double logarithmic coordinates of the incident laser power density P, and the slope of the curve is 0.51. The results show that the optical crosstalk caused by the high order diffraction effect is the main source of the crosstalk among the detection units of the same irradiation channel, and the main source of the crosstalk among the various detection units in different channels is the electrical crosstalk caused by the movement of the carriers. The experimental results show that the detector has a symmetrical distribution response to the continuous light when the low-heavy-frequency pulsed light is irradiated with the mercury detector of the TDI array, that is, there is a center of symmetry in the voltage response output curve, and the center is the axis. The output voltage on the left and right sides of the response curve is distributed at a symmetrical distribution of 180 degrees. The results show that the low-re-pulse laser causes a symmetrical response distribution to the mismatch of the incident light time and the detector integration period.
【學(xué)位授予單位】：國防科學(xué)技術(shù)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN215
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