REFLECTIVE REFLECTOR RETURNING INCIDENT ELECTROMAGNETIC RADIATION OF OPTICAL RANGE IN REVERSE DIRECTION Russian patent published in 2024 - IPC G02B5/12 

FIELD: optical instrument making.

SUBSTANCE: invention relates to a reflective reflector which returns radiation in the optical range in the reverse direction. Reflector is made of a transparent solid material in the form of a hollow volumetric body, the external reflecting surface of the volumetric body is made in the form of a regular polyhedral pyramid circumscribed about a cone with an opening angle of 90 degrees. On its refracting surface on the side of radiation incidence, a dielectric film is applied in the form of a circular zone, which provides an annular directivity pattern of the reflected radiation. On one third of the following facets of the outer lateral reflecting surface under the reflecting coating there is a transparent thin film with a relative refraction index n and a thickness d, on the second third of faces there is a transparent thin film with thickness d₁, and on the last third of faces there is a transparent thin film with thickness d₂.

EFFECT: obtaining reflected beams in a narrow wavelength range, possibility of using a wide range of optical materials and thin films, wider field of application of the device, including aggressive media and outer space.

1 cl, 4 dwg