MILLIMETER WAVE RANGE OPTICALLY TRANSPARENT REFLECTOR Russian patent published in 2007 - IPC G02B5/20 H01Q17/00 

FIELD: optical engineering.

SUBSTANCE: millimeter wave range system has device for reflecting incident radiation of millimeter wave range beam and for transmission of optical frequencies. Device has first layer of dielectric material made for reception and partial transmission of millimeter wave range incident beam, and one or several additional layers made of dielectric materials, which layers are lined up in relation to first layer. Additional layer partial transmits wave received through previous layer. Thickness of each layer is chosen in such a way that transmitted waves are damped in straight direction which results to high level of losses for propagation and high reflection. As a result, device reflects incident millimeter wave range beam while keeping optical transparency. Device can have alternating layers of optical sapphire and air.

EFFECT: reflection of millimeter wave range frequencies; transmission of optical frequencies without distortion.

15 cl, 10 dwg