Our work presents detailed theoretical analysis of two-element optical systems of
telephoto lenses and objectives of anallactic telescopes with internal focusing.
The first element of such systems has positive optical power and the second
element has negative optical power. This type of optical system is widespread in
practice mainly in the field of photographic lenses and in surveying instruments
(theodolites, leveling instruments, etc.) where the anallactic telescope with
internal focusing is being used. In our work we propose methods to determine the
basic parameters of such objectives, i.e., the focal lengths of both the
elements of the objective lens and their mutual axial separation. Furthermore,
the detailed analysis of aberration properties of such optical systems is
performed and methods for measuring the focal lengths of individual elements and
their mutual distance without the need for disassembling the investigated
optical system are presented.
© 2012 Optical Society of America
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