A device for extending the dynamic range of an image intensifier

By setting a filter assembly and an ambient light sensor at the front end of the image intensifier, the filter can be switched automatically or manually, solving the problem of decreased imaging performance of traditional image intensifiers in strong light environments, and achieving stable imaging and device integration over a wide illumination range.

CN224303943UActive Publication Date: 2026-05-29NORTH NIGHT VISION TECH RES INST GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
NORTH NIGHT VISION TECH RES INST GRP CO LTD
Filing Date
2025-05-27
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Traditional image intensifiers suffer from reduced imaging performance in strong light environments, and are prone to overexposure or damage. Existing filter solutions lack flexibility and are difficult to adapt to extreme lighting changes.

Method used

Design a device comprising a filter assembly, a switching unit, and an ambient light sensor, which automatically or manually switches filters of different light densities by detecting the intensity of incident light, thereby expanding the illuminance adaptation range of the image intensifier.

Benefits of technology

It achieves stable imaging of the image intensifier over a wide illumination range, avoids damage from strong light, expands application scenarios to day-night cycles or complex lighting conditions, and has a simple structure that is easy to integrate.

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Abstract

The utility model discloses a device for expanding the illumination adaptive range of image intensifier, is set to the front end of image intensifier to reduce incident light intensity, and it includes: filter assembly, filter switching unit and ambient light sensor, filter assembly sets up on filter switching unit, and it includes several different optical density filters, and any filter is consistent with image intensifier optical axis, and the filter switching unit can switch the filter of different optical density, ambient light sensor is located in the light incident end, and is used for detecting incident light intensity. The device for expanding the illumination adaptive range of image intensifier can effectively expand the working range of image intensifier, and expands the application scene to day and night alternation or complex illumination condition, avoids the overload damage caused by strong light.
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