Method and assembly to reduce external laser light scattering source in ring laser gyroscope

An optical readout device for a ring laser gyroscope, the optical readout device comprising:

• a reflector member comprising:
• an optical substrate component including a lower surface, a first upper surface portion substantially parallel to the lower surface, and a second upper surface portion that is angled with respect to the lower surface;
• an optical adhesive layer on the second upper surface portion of the substrate component;
• an optical part bonded to the second upper surface portion of the substrate component by the optical adhesive layer;
• and
• a first beam splitter layer on a surface of the optical part;
• wherein the reflector member is configured to reduce external cavity light scattering in the ring laser gyroscope.

A ring laser gyroscope, comprising:

• a laser block assembly having a cavity therein;
• a set of multilayer mirrors in optical communication with the cavity;
• an optical readout device in optical communication with the cavity, the optical readout device including a reflector member comprising:
• an optical substrate component that includes a lower surface, a first upper surface portion substantially parallel to the lower surface, and a second upper surface portion that is angled with respect to the lower surface;
• an optical adhesive layer on the second upper surface portion of the substrate component;
• an optical part bonded to the second upper surface portion of the substrate component by the optical adhesive layer;
• a first beam splitter layer on a surface of the optical part;
• and
• a second beam splitter layer on the lower surface of the optical substrate component;
• wherein the cavity, in conjunction with the multilayer mirrors and the optical readout device, provide an optical path for a laser beam in the laser block assembly;
• wherein the first upper surface portion of the optical substrate component is configured as an output port for the optical readout device;
• wherein the reflector member is configured to reduce light scattering of the laser beam in the cavity of the laser block assembly.