Ultraviolet communication film

Abstract

The invention relates to an ultraviolet communication film, and designs a multilayer film system composed of metal Al and MgF2 based on a JGS1 | MLMLML | Air film layer structure relying on an interference principle in allusion to dual requirements of ultraviolet communication on ultraviolet passing and other waveband inhibition. The optical performance of different structures in the ultraviolet communication film is simulated by adopting TFCalc, and the influence rule and mechanism of parameters such as film thickness, period and the like on the spectral characteristics of the ultraviolet communication film are disclosed. On the basis, the invention further discloses a preparation method, by continuously optimizing the structure of the ultraviolet communication film, the ultraviolet communication film of which the average transmissivity of 212-233 nm with the bandwidth of 21 nm is higher than 60%, the cut-off degree of visible light reaches 2.8 OD, and the transmissivity is higher than 72% when the wavelength is 221 nm within the incident angle of 0-10 degrees is obtained. The film has double properties of high visible cut-off of a metal film and high ultraviolet transmission of adielectric film, and the technical problem of selective transmission of ultraviolet communication is well solved.

Description

technical field [0001] The invention relates to the technical field of thin film manufacturing, and more specifically relates to an ultraviolet communication film. Background technique [0002] Informatization has been popularized in today's society and plays an important role in people's lives. Optical communication technology plays a very important role in the process of informatization. Communication thin films are still an important part of scientific research. The main application of ultraviolet light technology In national defense, industrial production, astronomical research, environmental protection testing, etc., such as ultraviolet alarm technology, imaging technology ultraviolet curing, ultraviolet astronomy technology, ultraviolet light communication, ranging, fingerprint detection, etc. Ultraviolet optical communication is an emerging communication system. The ultraviolet communication system works in the solar blind zone (200 nm ~ 280 nm) and based on the stron...

AI Technical Summary

Problems solved by technology

[0003] At present, in order to reduce the reflection loss on the surface of the optical element, coating the surface of the optical element with an appropriate anti-reflection coating is one of the key technologies of the optical system. However, there is currently no single material that has the optical properties of high UV transmission and high visible cut-off. The ultraviolet filter film is roughly divided into multilayer dielectric filter film and metal dielectric filter film, but the cut-off band of the metal film is wider than that of the multilayer dielectric film, and the metal film can deeply cut off visible light and infrared light, and the cut-off degree is high. It is based on multi-layer dielectric film and has the characteristics of less environmental pollution and less damage

The transmittance of metal dielectric film to short ultraviolet is not high at about 60%, so it is urgent to design a UV communication film that not only meets the requirements of selective transmission for communication, but also solves the problem of low transmittance of metal film and low cut-off of dielectric film

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