A night vision compatible near-infrared absorption anti-glare optical film and its preparation method and application

Abstract

The invention relates to an anti-dazzle optical film allowing compatible night vision and near-infrared absorption and a preparation method and application thereof; the anti-dazzle optical film comprises an optical transparent film base 20-200 Mu m in thickness and a near-infrared absorbing anti-dazzle coating 3-15 Mu m in thickness and applied to the transparent film base, wherein the near-infrared absorbing anti-dazzle coating contains transparent anti-dazzle microparticles 2-20 Mu m in average particle size and a near-infrared absorbent. With the base being of transparent film, the anti-dazzle optical film allowing compatible night vision and near-infrared absorption which is prepared via a precision wet coating process has excellent night vision compatibility, is less than 0.2% in light transmittance in the near-infrared range of 660-930 nm, is greater than 40% in light transmittance for visible light having wavelength in the range of 400-630 nm, and has excellent anti-dazzle performance and good visibility; the anti-dazzle optical film is applicable to the surface of a liquid display device, an instrument lighting system, and other lighting systems, and allows night vision imaging system compatibility.

Description

technical field [0001] The invention relates to a near-infrared absorption anti-glare optical film used in lighting systems such as liquid crystal display devices and instrument lighting and a preparation method thereof. The near-infrared absorption anti-glare optical film is compatible with night vision imaging systems. Background technique [0002] The human eye responds to electromagnetic waves in the range of 380-760nm, that is, the visible light region. However, the sensitivity of the human eye to light is not high under dark night conditions. This is due to the existence of a small amount of twilight light (such as moonlight, starlight and atmospheric glow, etc.) in the dark night environment, which makes people unable to observe normally in the dark night environment. In addition, all objects in the world emit infrared rays outward all the time, but no matter how strong or weak the infrared rays are, they cannot be seen by human eyes. [0003] The low-light night vis...

AI Technical Summary

Problems solved by technology

However, although the currently prepared near-infrared absorption filter film has strong absorption in the near-infrared region of 660-930nm, its transmittance in the visible region of 400-630nm is low, which affects its visibility.

For example, patent CN 102031047A discloses a near-infrared absorbing material with night vision compatibility and its preparation method. The average transmittance of light in the range of 660~930nm is about 0.1~0.2%, but the average transmittance of visible light at 400~630nm is only 20~30%, which affects its visibility to a certain extent

In addition, during the use of liquid crystal display devices, the screen surface reflects the strong light of the external lighting system or the display itself shines and produces glare, which interferes with people's eyes. If it is in this environment for a long time, it is easy to cause visual fatigue, and more seriously, it will threaten driver's life safety

At present, there is no relevant literature report on this type of filter film.

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