Continuous zooming optical system with heat elimination and wide pressure adaptability

Abstract

The invention provides a continuous zooming optical system with heat elimination and wide pressure adaptability, and solves the problem that an existing optical system cannot realize passive compensation of temperature and air pressure changes at the same time. The system comprises a front fixed lens group, a zoom lens group, a diaphragm, a middle fixed lens group, a compensation lens group, a rear fixed lens group and an optical filter which are sequentially and coaxially arranged along the light propagation direction; the front fixed lens group comprises a first positive lens, a first negative lens, a second positive lens, a third positive lens, a second negative lens and a fourth positive lens which are sequentially arranged; the zoom lens group comprises a first glued lens group with negative focal power and a fourth negative lens which are arranged in sequence; the middle fixed lens group comprises a sixth positive lens, a seventh positive lens and a fifth negative lens which arearranged in sequence; the compensation lens group comprises a second glued lens group with negative focal power; the rear fixed lens group comprises a seventh negative lens and a ninth positive lens which are sequentially arranged from left to right; and the zoom lens group and the compensation lens group can synchronously move back and forth along the optical axis direction to realize continuouszooming.

Description

technical field [0001] The invention relates to a continuous zoom optical system, in particular to a compact continuous zoom optical system that can be adapted to a high-definition image sensor and has an optical passive athermalization function and wide air pressure adaptability. Background technique [0002] Changes in ambient temperature and air pressure will cause the optical system to defocus and reduce image quality. In order to reduce the impact of temperature and air pressure changes on the imaging quality of the optical system, it is necessary to design the effects of heat dissipation and pressure elimination, that is, to compensate the defocus caused by temperature and air pressure changes through certain mechanical, optical and electronic technologies, so that The optical system maintains good imaging quality in a wide range of temperature and air pressure. [0003] At present, the methods of heat dissipation and depressurization of optical systems mainly include...

AI Technical Summary

Problems solved by technology

[0011] In order to solve the technical problem that the existing optical system cannot achieve passive compensation for temperature and air pressure changes at the same time, the present invention provides a continuous zoom optical system with heat dissipation and wide pressure adaptability

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