Large aperture acousto-optic tunable filter

Abstract

The invention discloses a large-aperture acousto-optic tunable filter, which includes an acousto-optic medium, a transducer and a welding layer. The transducer is bonded to the acousto-optic medium through the welding layer. From the optical medium to the transducer, there are primer layer I, transition layer I, bonding layer, transition layer II and primer layer II; the transducer is plated with a table electrode; the primer layer I and primer II are both titanium Thin film layer; the transition layer I and transition layer II are both copper thin film layers; the bonding layer is a tin-silver-indium alloy layer. During production, an evaporation source is provided on both sides of the transducer and the acousto-optic medium, and the bonding layer material is evaporated on the transducer and the acousto-optic medium at the same time to obtain a large-area bonding layer film with uniform thickness. The laminated film covers both the transducer and the copper film layer of the acousto-optic medium. The invention solves the problems that the optical aperture of the acousto-optic tunable optical filter is difficult to enlarge, and the welding quality is not good enough to withstand large driving electric power.

Description

technical field [0001] The invention relates to an acousto-optic device, in particular to an acousto-optic tunable filter with a large optical aperture. Background technique [0002] The hyperspectral imaging technology based on the acousto-optic tunable filter is one of the most effective technical means for international military reconnaissance. It organically combines imaging technology and spectral measurement technology. It can quickly find targets that cannot be identified by conventional means, which is of great significance in anti-stealth / camouflage, detailed battlefield investigation, target search and precise 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 componen...

AI Technical Summary

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 that the optical aperture of the acousto-optic tunable filter is difficult to enlarge, and the welding quality is not good enough to prevent Withstand large driving electric power and other issues

Images