Dual view infrared lens and imaging device

By designing a dual-field-of-view infrared lens and employing a specific lens combination and aspherical formula, clear imaging between 15mm and 35mm focal lengths was achieved, solving the problems of complex structure and large measurement error in existing technologies, and realizing the effects of large field-of-view search and small field-of-view high-resolution imaging.

CN122172422APending Publication Date: 2026-06-09安徽光智科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
安徽光智科技有限公司
Filing Date
2026-03-31
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

In the existing technology, continuous zoom systems have problems such as complex system structure, high processing and assembly difficulty during zooming, which leads to a decrease in transmittance and image quality. In addition, the wobbling of the line of sight causes large measurement errors, making it difficult to meet the requirements of large field of view search and small field of view high resolution imaging.

Method used

Design a dual-field infrared lens that switches between 15mm and 35mm focal lengths. It employs a combination of a first lens, a second lens, a third lens, and a fourth lens. The lens spacing and radius of curvature are designed to satisfy a specific aspherical formula. By combining aspherical and diffractive surfaces, the lens can switch between a large field of view and a small field of view.

Benefits of technology

It achieves clear imaging between 15mm and 35mm focal lengths, ensures stable imaging quality in both fields of view, has a simple structure, and meets the needs of large field-of-view search and small field-of-view high-resolution measurement.

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Abstract

This application discloses an imaging device, including a dual-field-of-view infrared lens and a detector for receiving images from the infrared lens. The dual-field-of-view infrared lens comprises a first lens, a second lens, a third lens, and a fourth lens arranged sequentially along the optical axis from the object side to the image side; the second lens is movable along the optical axis. When the focal length of the infrared lens is 15mm, the air gap between the first and second lenses is 7.53mm, and the air gap between the second and third lenses is 19.29mm. When the focal length of the infrared lens is 35mm, the air gap between the first and second lenses is 19.88mm, and the air gap between the second and third lenses is 6.94mm. The focal length of the infrared lens can be switched between 15mm and 35mm to achieve clear dual-field-of-view imaging. Only one focusing group is used to achieve switching between a large and small field of view, while ensuring the stability of the dual-field-of-view imaging quality; the structure is simple.
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