Low distortion large magnification long focal length HD zoom lens

Abstract

The invention relates to a low distortion magnifying power long focal length high definition zoom lens. The low distortion magnifying power long focal length high definition zoom length comprises a front fixed set A with focal power being positive, a zoom set B with focal power being negative, a compensation set C with focal power being positive, a variable diaphragm D and a rear fixed set with focal power being positive which are successively arranged along an incident direction. The front fixed set A comprises a double-convex lens A-1, a negative meniscus lens A-2, a double convex lens A-3,a negative meniscus lens A-4 and a positive meniscus ens A-5 which are successfully arranged along a light incident direction. The zoom set B comprises a negative meniscus lens B-1, a plane convex lens B-2, a plan concave lens B-3 and a plane concave lens B-4 which are successively arranged along the light incident direction. The compensation set C comprises a double convex C-1, a negative meniscus lens C-2, a double convex lens C-3 and a positive meniscus lens C-4 which are successfully arranged along the light incident direction. The rear fixed set E comprises a double convex lens E-1, a double concave lens E-2, a plane convex lens E-3, a double concave lens E4 and a plane convex E5 which are successfully arranged along the light incident direction. The low distortion magnifying power long focal length high definition zoom lens dramatically increases resolution, realizes system compactness and has minimum optical distortion.

Description

technical field [0001] The invention relates to a high-definition zoom lens with low distortion, large magnification and long focal length. Background technique [0002] For the telephoto surveillance lens, the reflective structure is generally adopted, which can achieve the purpose of the overall length of the system and the compact structure, but the reflective system has defects such as small field of view, central blocking of light, reduced diffraction limit, and difficulty in eliminating stray light; When using a transmissive structure, there are problems such as difficulty in shortening the total length of the system, difficulty in selecting large-size glass materials, and difficulty in correcting aberrations, especially secondary spectral aberrations; as the pixel size of image sensors continues to decrease, its characteristic frequency increases rapidly , photoelectric video monitoring also needs to improve the resolution level; when the monitoring system is required...

AI Technical Summary

Problems solved by technology

[0002] For the telephoto surveillance lens, the reflective structure is generally adopted, which can achieve the purpose of the overall length of the system and the compact structure, but the reflective system has defects such as small field of view, central blocking of light, reduced diffraction limit, and difficulty in eliminating stray light; When using a transmissive structure, there are problems such as difficulty in shortening the total length of the system, difficulty in selecting large-size glass materials, and difficulty in correcting aberrations, especially secondary spectral aberrations; as the pixel size of image sensors continues to decrease, its characteristic frequency increases rapidly , photoelectric video monitoring also needs to improve the resolution level; when the monitoring system is required to cooperate with the measurement system, the image distortion is required to be as small as possible, and at the same time, the necessary information such as the focal length of the system is output to improve the measurement accuracy

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