STABILITY OF THE PROPERTIES OF AN ACOUSTO-OPTICAL CONVERTER BASED ON POLYVINYLIDENE FLUORIDE FILMS UNDER EXTERNAL INFLUENCE ArticleOsipkov A.S., Makeev M.O., Solodilov V.I., Moiseev K.M., Mikhalev P.A., Makarova K.T., Emanov D.P., Parshin B.A., Khromova M.A.Journal of Optical Technology. Том 91. 2024. 502 с.