CAJ | 학술논문

利用红外全景天空相机可以获得天空中云的分布和温度信息,从而可对天气状况做出判断.采用等距离投影成像方式,可根据简单的数据转换关系从天空全景图像中任意点的位置坐标得到其对应的空间角度.为了实现等距离投影红外全景相机的设计,提出了一种简洁高效的计算等距离投影反射镜面型的数值方法,并在此基础上设计了8~12滋m长波红外波段全景天空相机.该相机的视场角为360毅×(5毅~80毅),校准畸变量在±0.02%以下,MTF值在探测器Nyquist频率处高0.4,非常适用全景天空观测.
이용홍외전경천공상궤가이획득천공중운적분포화온도신식,종이가대천기상황주출판단.채용등거리투영성상방식,가근거간단적수거전환관계종천공전경도상중임의점적위치좌표득도기대응적공간각도.위료실현등거리투영홍외전경상궤적설계,제출료일충간길고효적계산등거리투영반사경면형적수치방법,병재차기출상설계료8~12자m장파홍외파단전경천공상궤.해상궤적시장각위360의×(5의~80의),교준기변량재±0.02%이하,MTF치재탐측기Nyquist빈솔처고0.4,비상괄용전경천공관측.
By use of an infrared all-sky camera, the distribution and thermal information of cloud in the sky can be obtained, thus the weather conditions can be further estimated and predicted. with the equidistance projection imaging method, every point in an all -sky image can be mapped into its corresponding spatial angle via simple data processing and conversion. An easy-to-use numerical method was proposed to acquire the profile of a catadioptric mirror, which brought the property of equidistance projection and played the most important role in a catadioptric panoramic lens. With this numerical method, an f-theta catadioptric infrared panoramic sky lens operating at 8-12μm was designed for cloud observation. The sky lens had a wide field of view of 360oí(5o~80o), the calibrated distortion was less than ±0.02%, and the MTF was over 0.4 at the Nyquist frequency of 14 lp/mm. The designed camera was very suitable for all-sky observation.