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有一些结构型式简单的光学镜头,它们的孔径较大,有着优良的轴上象质,但由于结构型式上无法较正轴外象差,因此视场很小,使用受到限制。本文提出一种改善轴外象质的设想,即在光路中任意加进称之为“视场校正器”的一片或两片单透镜,它对原来镜头的光学性能和轴上象质毫无影响,但是却能使轴外象质得到明显改善。文章对这种视场校正器的光学参数、象差特点进行了讨论,并以f′=100毫米,D/f′=1/4和f′=72毫米,D/f′=1/2两个镜头为例,具体说明视场校正器的应用,当加进视场校正器后,镜头视场可以扩大到原来的1.5—2倍。
There are some simple structure of the optical lens, their larger aperture, with excellent on-axis image quality, but due to the structure of the type can not be more than the axis of axial aberrations, so the field of view is small, the use is limited. This paper presents a vision to improve the assumption of off-axis, which is arbitrarily added in the optical path called “field of view corrector” one or two single lens, its original lens optical performance and the axial image quality nothing However, it can significantly improve the quality of off-axis images. The optical parameters and aberrations of such a field-of-view corrector are discussed in detail with f ’= 100 mm, D / f’ = 1/4 and f ’= 72 mm and D / f’ = 1/2 Two lenses, for example, specify the application of the field of view corrector, when added to the field of view corrector, the lens field of view can be expanded to 1.5-2 times the original.