摘要
针对共形光学系统中因大倾斜、大偏心带来的像差校正困难以及双框架结构带来的体积大、结构不紧凑的问题，采用了由Wossermann-Wolf方程确定的固定校正透镜与Zernike旋转双光楔相结合的结构，通过两个光楔沿光轴方向相对转动实现对不同关联视场（ FOR ）像差的校正，使得系统结构更加紧凑，并且更好地校正了共形光学系统的像差。设计了焦距f=90 mm、口径D=48 mm、波长3.7~4.8μm的共形光学系统，关联视场为＆#177;42＆#176;，瞬时视场角为＆#177;2.44＆#176;，利用二元衍射元件实现光学被动消热差，结果表明，在-20~60＆#176; C内各个视场的光学传递函数在17 lp/mm处大于0.45，成像质量优良。
According to the large aberration of conformal optical system caused by the large slope and eccentric, the rotation double Zernike phase plates were combined with fixed corrector based on Wossermann-Wolf equation. The aberration of optical system in different field of regard （FOR） was effectively corrected by rotating the two plates. It can both improve the image quality and make the structure more compact. An optical system with f=90 mm, diameter D=48 mm, wavelength 3.7-4.8μm, field of regard （FOR） ＆#177;42＆#176;, instant view angle ＆#177;2.44＆#176; was designed. The results show that each field of optical transfer function is close to the diffraction limit. An optical passive athermal infrared conformal system is realized by using DOE elements. During -20-60＆#176; C the merit transmitting function in each FOR is more than 0.45 at 17 lp/mm. The image quality performs well.
出处
《红外与激光工程》
EI
CSCD
北大核心
2014年第2期528-534,共7页
Infrared and Laser Engineering
基金
装备预研基金(51301060207)
