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Optical wire gauge is a kind of high precision measuring tool, which is widely used in machine tools, grinding machines, milling machines, welding machines and other equipment for length measurement and positioning. This paper will introduce the use method of optical wire rule in detail, including its basic principle, calibration steps, operation steps and precautions.

As a precision measuring tool, optical wire gauge plays a vital role in modern industry and science and technology. It combines moire fringe of grating and photoelectric conversion technology to provide a linear measurement benchmark with high accuracy, high stability and high reliability. This paper will introduce the principle, type, application, maintenance and calibration methods of optical wire gauge in detail.

Computer-Generated Holography (CGH) is a technique that generates a user-defined wave front through computer-generated holograms and optical reconstruction. This technique has been widely studied and applied in the field of information optics since it was proposed by German scientist Roman in the late 1960s. Computational holography can not only record the intensity of information, but also record its phase, which makes it have a wide range of applications in 3D display, optical information storage and processing, entertainment and encryption.

An American Standard resolution board, also known as a USAF 1951 resolution board or an Optical resolution inspection board, is a tool specifically designed to evaluate the resolution and imaging quality of optical systems. It is designed according to the US military standard MIL-STD-150A and has a wide range of applications, from high-precision optical systems for aerospace and astronomical observation to the manufacture of ordinary optical products in daily life.