PLANAR BINARY MICROLENS Russian patent published in 2012 - IPC H01P3/20 

FIELD: physics.

SUBSTANCE: planar cylindrical binary microlens, having a rectangular entrance aperture. The refracting surface of the lens is a stepped binary diffraction profile along the optical axis of the lens. The binary microrelief satisfies the equation:

where L is the length of the lens, n₀ is the refraction index of the lens material, x_m, is the beginning and end of the m-th step of the lens material along the X axis, crosswise with respect to the optical axis Z, w=0,1,2,…,M, M is the number of steps of the binary grating of the lens. Such a lens can be used to focus light in a planar waveguide, matching planar waveguides, designing imaging planar devices etc.

EFFECT: enabling focusing a flat light wave with a narrow spot without using different materials for production thereof.

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