Mirror objectives with variable focal length |
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| Authors: | N K Artyukhina and A P Shkadarevich |
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| Institution: | (1) Belorussian National Technical University, 65 prosp. Nezavisimosti, Minsk, 220013, Belarus;(2) Lasers in Environmental Science, Medicine, and Technology Unitary Enterprise, Minsk, Belarus |
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| Abstract: | We consider some issues involved in constructing a mirror system with a discrete variable focal length. We propose a procedure
for designing two-mirror pancratic (zoom) systems with fixed image plane. In constructing the optimal layouts, we studied
a basic two-mirror system to achieve minimum spherical aberration. We present the calculated design characteristics of an
objective consisting of two spherical mirrors and providing a three-fold variation in focal length.
Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 76, No. 3, pp. 453–459, May–June, 2009. |
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| Keywords: | objective mirror (convex and concave) entrance pupil diameter central obscuration aperture angular field of view aperture ratio radius back focal length spherical aberration coma astigmatism image curvature distortion image plane zero-offset (paraxial) ray angles and heights summary of basic system parameters Seidel coefficients optimization |
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