OPTICAL ATTENUATOR Russian patent published in 1997 - IPC

FIELD: optical communication, detection and ranging systems, laser engineering. SUBSTANCE: optical attenuator uses inlet prism 1 and outlet prism 2 with optical refractive index n₁, plane dielectric layer 3 with refractive index n₂ and thickness d₂ between the conjugate hypotenuse faces of prisms 1 and 2, turnable 4 with the axis of rotation perpendicular to the prism hypotenuse faces; the angles between the outlet face of the second prism and inlet face of the first prism, between the lateral face of the second prism and its hypotenuse face, and between the outlet face of the second prism and its hypotenuse face are determined from relationships given in description. EFFECT: improved design. 3 dwg