SELECTIVE MIRROR Russian patent published in 2019 - IPC G02F1/00 

FIELD: optics.

SUBSTANCE: invention relates to the field of optical instrument-making, multilayered optical filters, elements of quantum electronics and can be used for protection against blinding radiation, narrow-band filtration of optical radiation, creation of mirror elements with controlled coefficient of reflection and transmission, and so forth. Selective mirror comprises alternating layers of dielectric with large and smaller refraction coefficients, obtained by recording in photopolymer counter coherent, equal in intensity to radiation monochromated to the required level. It includes a hologram in which alternating dielectric layers with larger and smaller refraction coefficients are formed, which is recorded according to the Denisyuk scheme in opposite beams on low-molecular liquid crystals, enclosed in polymer matrix, main and additional piezoelectric elements connected to alternating voltage source, stop. On the additional piezoelectric element there fixed is a hologram recorded on low-molecular liquid crystals, enclosed in a polymer matrix, the hologram is placed between glass substrates coated with transparent electrodes and is a layered structure parallel to the plane of electrodes, one surface of which is fixed by means of a stop relative to the substrate with transparent electrodes.

EFFECT: technical result is providing narrow-band filtration of optical signal, high modulation depth.

1 cl, 2 dwg