When a particular class of partially coherent light is incident upon a circular aperture, the on-axis spectrum of the light in the far zone is different from the spectrum of the light at the aperture.

Abstract: Analytical expressions for the electromagnetic scattering in the far-field zone of an electrically small circular aperture in an infinite conducting screen with zero thickness were derived ...

The Sony 600mm is ideal for bird photography. The lens features 11 aperture blades, a 0.14x maximum magnification, and a close focusing distance of 4.5m. The 600mm has a filter diameter of 40.5mm ...

Large-aperture ultra-wide performance in a compact lens The use of aspherical lens elements in the FE 16mm F1.8 G, including Sony's high-precision AA (Advanced Aspherical) lens, has made it ...

Optical trapping of small particles typically requires the use of high NA microscope objectives. Photonic metasurfaces are an attractive alternative to create strongly focused beams for optical ...