Vol. 11 No. 1 (2019)
This issue contains seven regular papers devoted to various aspects of photonics: from manufacturing optical elements (including optical fibers, also with liquid crystals as a cladding), trough possibility of qualitative visualization of the surface defects on semiconductor wafers (thanks to the Makyoh-topography imaging), to applications (investigation of two-photon vision and brain-computer interface). These articles prove that photonic tools, elements and devices seem to be necessary in modern technology.