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本文主要介绍一种折反式镜头结构参数的解算程序和解算公式。通过这个程序,可以保证在一定的中心拦光比和后工作距离的前提下,由给定的初级象差要求,解算出系统的结构参数,使镜头的象差平衡获得较为满意的结果。将这个程序与象差计算程序联合使用,就可使镜头的象差设计半自动化。我们通过在CANON BX—1台式微型电子计算机上的实践证明,利用可程序的微型电子计算机,用这一程序设计此种结构的折反式物镜并不比设计一个双胶合物镜复杂多少。此外,即使在大型电子计算机上自动设计这种折反镜头,也必须先有一个合适的初始结构,才能避免设计结果的中心拦光比过大,而本文所介绍的程序正好可以提供这个合适的初始结构。
This article mainly introduces the solution procedure and solution formula of the structure parameters of the Fold-Rex. Through this procedure, under the premise of a certain center block ratio and the after-work distance, the structural parameters of the system can be solved by the given primary aberration requirements, so that the lens aberration balance obtains more satisfactory results. By using this program in conjunction with the aberration calculation program, the aberration design of the lens can be semi-automated. Our practice on a CANON BX-1 benchtop miniature computer proves that it is no more complicated than designing a doublet objective to design such a structure with the use of a programmable microcomputer. In addition, even if such a fold-back lens is designed automatically on a large electronic computer, a proper initial structure must be in place to prevent the center block ratio of the design result from being too large. However, the procedure described in this article can provide this suitable The initial structure.