Large-aperture acousto-optical tunable filter

Abstract

The invention discloses a large-aperture acousto-optical tunable filter which comprises an acousto-optical medium, an energy converter and five welding layers. The energy converter is connected with the acousto-optical medium through the welding layers, a bottoming layer I, a transition layer I, a bonding layer, a transition layer II and a bottoming layer II are sequentially arranged from the acousto-optical medium to the energy converter, a surface electrode is plated on the energy converter, both the bottoming layer I and the bottoming layer II are titanium film layers, both the transition layer I and the transition layer II are copper film layers, and the bonding layer is a tin silver indium alloy layer. During manufacture, evaporation sources are arranged on two sides of the energy converter and the acousto-optical medium and evaporate bonding layer materials for the energy converter and the acousto-optical medium to obtain large-area uniform thickness bonding layer films, and thebonding layer films simultaneously cover the copper film layers of the energy converter and the acousto-optical medium. The acousto-optical tunable filter solves the problems that the optical apertureof an existing acousto-optical tunable filter is difficultly made large, welding quality is not good enough and cannot bear high driving electric power and the like.

Description

technical field [0001] The invention relates to an acousto-optic device, in particular to an acousto-optic tunable filter with a larger optical aperture. Background technique [0002] Hyperspectral imaging technology based on acousto-optic tunable filter is one of the most effective technical means for international military reconnaissance. It can quickly find targets that cannot be identified by conventional means, and is of great significance in anti-stealth / camouflage, detailed battlefield inspection, target search and accurate identification, etc. It can be widely used in hyperspectral and hyperspectral imaging warning and reconnaissance systems such as aircraft missiles Early warning, battlefield reconnaissance, mine detection, offshore detection, anti-submarine reconnaissance and evaluation of ammunition damage effects. [0003] The acousto-optic tunable filter is a key component in the acousto-optic hyperspectral imaging system. The larger the optical aperture, the s...

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Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to propose a large-aperture acousto-optic tunable filter to solve the problem th...

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