Sanjib Chatterjee

TL;DR: In this article, the tangential surface profile of Toroidal mirrors (TMs) used in synchrotron radiation beam lines is measured by adjusting a line focus on the surface of the TM, along the central tangential section.

TL;DR: In this article, a differential interferometric technique for the measurement of surface roughness of plane optical surfaces is proposed, where a polarization Sagnac interferometer, placed in the image space of a reflection microscope system with linearly polarized, spatially coherent, quasimonochromatic incident beam illumination, splits the image-forming beam from a plane test surface (TS) into laterally sheared (LS) linear orthogonal components.

TL;DR: In this article, a simple self-referenced technique for the internal measurement of a right angle is presented, where a polarization cyclic path optical configuration (CPOC) is used to superpose the mutually inclined plane wave components by duplicating the input pair of plane wave fronts and introducing appropriate lateral shear between the identical pairs.

TL;DR: In this article, a Sagnac interferometer is used in the image space of a transmission DIC microscope to produce small/differential laterally sheared, coherent beam components that interfere to form DIC images.

TL;DR: In this paper, a common path interferometric auto-collimation technique is proposed for generating Fizeau fringes formed due to interference between two split up plane wave components with angular separation equal to four times of the angular deflection of the plane test mirror.