EXPERIMENTAL OPTICAL CHARACTERIZATION OF TRANSPARENT MEDIA (PLANE GLASS, WATER-GLASS LAYERED STRUCTURE, AND CONVEX LENS) USING IMAGE-OBJECT SPATIAL CORRELATION TECHNIQUE

In-depth experimental observation of the resulting properties of light-matter interaction can pave the way for new applications in the evaluation of the suitability of materials for optical devices, such as lenses, waveguides, or coatings, and curriculum development. This study explores the nature of resulting images as a result of transmission and partial reflection of light with three major transparent media (plane glass (SG), glass-water sandwiched (SGWG) and convex lens (SC)). The transparent medium sample is successively mounted on an adjustable optical bench where object/image distances are spatially varied to observe the nature of images formed with reference to the observer’s position from the medium, do (20 cm). This procedure was repeated for the three samples of various object distances, Um from the medium, Um (5cm - 25cm) where the characteristics of the image formed were examined under longitudinal nature, magnification/size, and transverse orientation. The nature of an image formed from an object can be manipulated by altering the medium of transmission and object/image spatial displacement. The plane glass has the same characteristics (erect, same size, slight lateral displacement, and no lateral inversion) irrespective of the distance, whereas the convex lens demonstrated unconventional lateral inversion characteristics at some points beyond the focal point of the lens. With water sandwiched between two unsilvered plane glasses, the observed images are similar to that of a convex lens, except for the erectness in the longitudinal nature of the image with an inclusion of lateral inversion in both cases. This is attributed to the partial reflective characteristic of water that accompany transmission when sandwiched between plane glasses. Therefore, the heresy in optical illusion is a function of the distance between the medium and object, Vm. This new unconventional lateral inversion discovery beyond the focal length of the sample can be used as a decoy for security applications