CAJ | 학술논문

分析了基于波前编码技术的无热化光学系统中相位掩模板的自身热效应,得到了不同温度下光瞳处相位板相位函数的变化.分析了由相位板热效应引起的波前编码系统成像特性的变化.通过数值及图像仿真证明了相位板热效应对波前编码无热化光学系统性能产生的影响.结果表明,相位板热效应对系统MTF(调制传递函数)的离焦不变特性和编码图像的可复原性产生严重的影响.
분석료기우파전편마기술적무열화광학계통중상위엄모판적자신열효응,득도료불동온도하광동처상위판상위함수적변화.분석료유상위판열효응인기적파전편마계통성상특성적변화.통과수치급도상방진증명료상위판열효응대파전편마무열화광학계통성능산생적영향.결과표명,상위판열효응대계통MTF(조제전체함수)적리초불변특성화편마도상적가복원성산생엄중적영향.
Thermal effect on phase masks in wavefront-coded athermalized imaging systems is analyzed.Several wellknown odd-symmetric phase functions at different temperature are derived.The properties of phase functions suffering from thermal effect are presented.The performances of the phase functions are evaluated with and without considering thermal effect by numerical simulation.The results show that the similarity of out-of-focus MTFs and recoverability of blurred encoding images of the wavefront-coded athermalized system are degraded severely by the thermal effect.