Compact high-zoom-ratio high-definition continuous zooming fog-penetrating camera lens

Abstract

The invention relates to a compact high-zoom-ratio high-definition continuous zooming fog-penetrating camera lens. A front fixed group A with positive focal power, a zoom group B with negative focal power, a fixed diaphragm C, a rear fixed group D with positive focal power, a compensation group E with positive focal power and a color filter group F with zero focal power are sequentially arranged in an optical system of the camera lens along an incident direction of light rays from left to right, color filters of different film systems are plated in a switching way to realize the switching of avisible light working mode and a fog-penetrating working mode; the cut-off waveband is 650-1100 nm in the visible light working mode, the cut-off waveband is 350-700 nm in the fog-penetrating workingmode, and the continuous variable focal distance is realized by changing the intervals among the front fixed group A, the zoom group B and the diaphragm C; the optimal image plane offset caused by the position change of the zoom group is compensated by changing the intervals among the rear fixed group D, the compensation group E and the color filter group F, and the optical total length is kept unchanged in the zooming process.

Description

technical field [0001] The invention relates to a compact high-zoom ratio high-definition continuous zoom fog-penetrating camera lens. Background technique [0002] At present, the airborne camera system requires the lens to be small in size, light in weight, large in detection distance, and high in definition. It can not only perform panoramic search of a large area with a small magnification, but also perform a zoomed-in observation of a small area with a large magnification. The optical structure of the traditional mechanically compensated zoom lens consists of four components in sequence: the front fixed group, the zoom group, the compensation group and the rear fixed group. However, this optical mechanism will result in a longer optical length, which will increase the volume, and the zoom ratio is small, the resolution is low, and the image quality is not good. It is especially not suitable for the airborne environment with extremely compact space. Disadvantages such a...

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Problems solved by technology

[0004] In particular, my country has a vast territory, diverse geographical environment, and climatic conditions, especially the haze environment is more common, it is necessary for the camera system to meet most application environments as much as possible, and there is an urgent need for the airborne camera system to have the function of fog penetration, which increases the difficulty of design

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