CAJ | 학술논문

针对传统形式三反光学系统难以实现大视场的缺点，提出了一种基于反摄远结构的三反光学系统，并获得初始结构参数求解方程。在反摄远结构三反光学系统中，将主、次镜组成反转伽利略望远镜结构形式，以便简化三反光学系统初始参数的求解方程，最终通过视场偏置的办法实现无遮拦设计。基于上述方法，采用光学设计软件Code V设计了焦距f=100 mm，F数为5，视场为20o×20o。像质评价结果表明，系统在空间频率为50 lp/mm处的MTF值均大于0.6，像质优良。与其他三反光学系统相比，该系统不仅具有大视场，而且仅使用了两块非球面反射镜，降低了系统成本。
침대전통형식삼반광학계통난이실현대시장적결점，제출료일충기우반섭원결구적삼반광학계통，병획득초시결구삼수구해방정。재반섭원결구삼반광학계통중，장주、차경조성반전가리략망원경결구형식，이편간화삼반광학계통초시삼수적구해방정，최종통과시장편치적판법실현무차란설계。기우상술방법，채용광학설계연건Code V설계료초거f=100 mm，F수위5，시장위20o×20o。상질평개결과표명，계통재공간빈솔위50 lp/mm처적MTF치균대우0.6，상질우량。여기타삼반광학계통상비，해계통불부구유대시장，이차부사용료량괴비구면반사경，강저료계통성본。
For the disadvantage of conventional three mirrors system to achieve wide field of view, a new-style unobscured three-mirror optical system with wide field of view was designed based on the retrofocus-type objective configuration. One powerful retrofocus design approach was the combination with a reversed Galilean Telescope, the expression of initial configuration parameters was obtained and the unobscured style was carried out by decenter the field. A system with effective focal length of 100 mm, field of view of 20oí20o and F-number of 5 was designed, the modulation transfer function value at spatial frequency of 50 lp/mm was over 0.6 and image qualities were excellent. Compared with traditional common three-mirror optical systems, the most prominent advantage of this new three-mirror system are that it can provide wide field of view and just use two aspheric mirrors and one spherical, so that the cost of this system will be reduced.