CAJ | 학술논문

推导了星载红外探测在地面、大气双背景下探测器处的辐射照度对比度计算公式，计算了目标在不同温度、不同高度的目标与背景的绝对对比度和相对对比度。分析指出：随着目标温度、高度增加，在波长大于2.5μm区域绝对对比度与相对对比度相应增大，目标高度越高，同等距离下对比度随目标高度的变化越小；波长小于2.5μm需考虑太阳的影响；当目标在0 km高度时，2.9~4.1μm波段为最佳探测波段，随着目标高度的增加，可用探测波段范围增大，峰值波长向短波方向微移，当目标高度大于10 km时，相对对比度峰值在2.6~2.8μm之间；距离地面越近，大气对红外辐射的衰减越大。
추도료성재홍외탐측재지면、대기쌍배경하탐측기처적복사조도대비도계산공식，계산료목표재불동온도、불동고도적목표여배경적절대대비도화상대대비도。분석지출：수착목표온도、고도증가，재파장대우2.5μm구역절대대비도여상대대비도상응증대，목표고도월고，동등거리하대비도수목표고도적변화월소；파장소우2.5μm수고필태양적영향；당목표재0 km고도시，2.9~4.1μm파단위최가탐측파단，수착목표고도적증가，가용탐측파단범위증대，봉치파장향단파방향미이，당목표고도대우10 km시，상대대비도봉치재2.6~2.8μm지간；거리지면월근，대기대홍외복사적쇠감월대。
The irradiance contrast formula of target and background for satellite-borne infrared detector under both ground and atmosphere background was derived. The absolute contrast and the relative contrast at various target altitude and temperature were calculated. The analysis conclusions show that the absolute contrast and the relative contrast increase with the target temperature and altitude for wavelength of larger than 2.5μm. The higher the target altitude is, the less the contrast changes per unit distance. The effect of the sun should be considered when the wavelength is less than 2.5μm. For target at 0 km altitude, 2.9-4.1μm is the optimum detective waveband. As the target altitude increases, the available detective waveband broadens and the peak wavelength moves to short wave direction slightly. When the target altitude is higher than 10 km, relative contrast peak value appears at 2.6-2.8μm. The nearer the target is from the ground, the higher the atmospheric attenuation is to infrared radiation.