An optical apparatus for formation of multiple light spots with controlled spot intensity and variable geometry of the multi-spot pattern, the apparatus adapted to receive light from a light source and comprising in order along a light path: an input optical system generating an input collimated light beam with a minimized divergence from the light source, a beam splitter that implements angular polarization splitting of said collimated light beam, the beam splitter comprising one or more birefringent wedge-shaped prisms (W1 - W11) made of crystalline materials and implemented in such a way that the optical axis of the crystal of each said prism (W1 - W11) forms an angle with the ridgeline of its refractive surfaces, and the angle value is in a range from 0° to approximately 90°, the said birefringent wedge-shaped prisms (W1 - W11) being installed in the beam splitter as separate optical elements or in prism groups (PG1 - PG4), the collimated light beam is split into two or more separate output beamlets characterized by different angles to the optical axis of the apparatus and same divergence as the input collimated light beam, the said beam splitter further comprises at least one rotatable dual waveplate (D 1 - D6) realizing a half-wave phase front retardation effect simultaneously at two operating wavelengths λ 1 and λ 2 or realizing a quarter-wave phase front retardation effect simultaneously at two operating wavelengths λ 1 and λ 2, and its rotation is used to control the energy sharing of the input collimated light beambetween the said output split beamlets, the said beam splitter further includes at least one rotatable birefringent wedge-shaped prism (W1 - W 11) or a prism group (PG1 - PG4), the rotation of which is used to control the geometry of the pattern of multiple spots, anda focusing optical system for focusing the said split beamlets in the multi-spot pattern in a working field of a selected application or on a workpiece. an input optical system generating an input collimated light beam with a minimized divergence from the light source, a beam splitter that implements angular polarization splitting of said collimated light beam, the beam splitter comprising one or more birefringent wedge-shaped prisms (W1 - W11) made of crystalline materials and implemented in such a way that the optical axis of the crystal of each said prism (W1 - W11) forms an angle with the ridgeline of its refractive surfaces, and the angle value is in a range from 0° to approximately 90°, the said birefringent wedge-shaped prisms (W1 - W11) being installed in the beam splitter as separate optical elements or in prism groups (PG1 - PG4), the collimated light beam is split into two or more separate output beamlets characterized by different angles to the optical axis of the apparatus and same divergence as the input collimated light beam, the said beam splitter further comprises at least one rotatable dual waveplate (D 1 - D6) realizing a half-wave phase front retardation effect simultaneously at two operating wavelengths λ 1 and λ 2 or realizing a quarter-wave phase front retardation effect simultaneously at two operating wavelengths λ 1 and λ 2, and its rotation is used to control the energy sharing of the input collimated light beambetween the said output split beamlets, the said beam splitter further includes at least one rotatable birefringent wedge-shaped prism (W1 - W 11) or a prism group (PG1 - PG4), the rotation of which is used to control the geometry of the pattern of multiple spots, anda focusing optical system for focusing the said split beamlets in the multi-spot pattern in a working field of a selected application or on a workpiece.