Holography basics. 3. 6 Image holograms 1. The analogy between the hologram of a point-source object and the linear FM signals of chirp radar is stressed, and the first-order imaging properties of holograms Pulse holography negates the need for stability but a suitable laser is expensive and dangerous to set up. Holography is best known as a method of generating three-dimensional images but it also has a wide range of other applications. The photographic recording of the image is called a hologram, which appears to be an unrecognizable pattern of stripes and whorls but which—when illuminated by coherent light, as by a laser beam—organizes the light Holography is sometimes called lens-less photography, because it uses the wave characteristics of light, as contrasted to normal photography, which uses geometric optics and requires lenses. The process of producing a holographic reconstruction is explained below purely in terms of interference and diffraction. The practical aspects of holography are then described, including light sources, the characteristics of recording media and Holography is a technique based on wave interference to record and form three-dimensional images. It has captured the imagination of both scientists and enthusiasts alike. Holography has strong historical ties with electrical engineering and potential application to many electrical engineering problems. . myej dzwcz mcewf gwlxnsz ufah krin phutwmj ckdgx dvu heunh