A compact continuous zoom optical system

Abstract

The invention provides a compact continuous zoom optical system, which solves the problem that the existing continuous zoom optical system has a large optical total length and a small field of view focal length, and cannot realize miniaturization and large zoom ratio. The system coaxially arranges the front fixed lens group, the zoom lens group, the aperture, the middle fixed lens group, the compensation lens group, the rear fixed lens group and the optical filter in sequence along the optical axis; the focal power of the front fixed lens group is Positive; the focal power of the zoom lens group is negative, which includes the zoom front group and the zoom rear group arranged in sequence from left to right, the focal length of the zoom lens group is f7, and the focal length of the zoom group is f745 , the focal length of the telephoto end of the continuous zoom optical system is fL, f7, f745 and fL satisfy the following conditional formula: 35<|fL / f7|<74; 0.7<|f7 / f745|<1.2; the optical focus of the middle fixed lens group The optical power of the compensation lens group is positive; the optical power of the rear fixed lens group is negative; the zoom lens group and the compensation lens group can move back and forth along the optical axis synchronously to realize continuous zooming.

Description

technical field [0001] The invention belongs to the field of photoelectric technology and relates to a continuous zoom optical system, in particular to a continuous zoom optical system which can be adapted to a high-definition image sensor and has a compact volume envelope. Background technique [0002] The continuous zoom optical system can achieve continuous acquisition of target images, which is of great significance in optoelectronic systems and has been widely used in various optoelectronic systems. In recent years, with the wide application of small pixel high-sensitivity image sensors, the upgrading of old products of photoelectric imaging loads and the trial production and development of new products have also put forward more stringent requirements for the compactness and miniaturization of optical systems. At present, there are many types of continuous zoom optical systems in various forms at home and abroad, but the telephoto ratio between the total optical length...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem that the optical total length of the existing continuous zoom optical system and the focal length of the small field of view are relatively large, and the miniaturization and large zoom ratio cannot be realized, the present invention provides a compact continuous zoom optical system

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