Large-diameter catadioptric three-component continuous zoom optical system
An optical system and zoom system technology, which is applied in the field of continuous zoom optical system design of large-aperture telescopes in the visible light and near-infrared bands, can solve the problem of increased volume, complex system structure, inability to make full use of the light-gathering ability of large-aperture telescope mirrors and Resolution advantages and other issues, to achieve the effect of long focal length, simple optical path form, and good aberration correction ability
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[0016] Specific implementation mode 1. Combination Figure 1 to Figure 3 Description of this embodiment, a large-aperture catadioptric three-element continuous zoom optical system, using a secondary imaging method, the system is composed of a front-end Cassegrain reflective telescopic objective lens and a rear-end transmissive zoom system; the zoom system The three-component mechanical compensation method is adopted, which are the front fixed group 7, the compensation group 8 and the zoom group 9 in sequence. The Cassegrain telescopic objective lens at the front adopts a reflective form, which does not produce chromatic aberration, and reduces the chromatic aberration and secondary spectral correction pressure of the back-end transmission system; the light beam passes through the primary mirror 1, secondary mirror 2, and third mirror 3 in the Cassegrain telescopic objective lens in sequence And four mirrors 4, after the first image plane 5, the light beam is collimated by the ...
specific Embodiment approach 2
[0021] Specific embodiment two, combine Figure 1 to Figure 8 This implementation mode is described. This implementation mode is an example of a large-aperture catadioptric three-component continuous zoom optical system described in the first specific implementation mode:
[0022] This embodiment provides a set of catadioptric continuous zoom optical system with an aperture of 1000mm and a focal length of 2000mm to 6000mm. The working band of the system is 500nm to 800nm, relative to the aperture of 1 / 2 to 1 / 6, and its field of view is 0.33° ~0.14°.
[0023] combine figure 1 and image 3 , The system described in this embodiment is composed of a front-end Cassegrian reflective objective lens, a field lens and a rear-end zoom system. The design of the reflective objective fully considers factors such as system obscuration ratio, processing difficulty, and structural size. The primary mirror 1 has a diameter of 1000mm, a radius of curvature of 3600mm, and a paraboloid; the se...
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