Visual Testing in NDT (Non destructive testing)
Visual Testing in NDT: Visual Inspection is method of visually inspecting the material for deciding the acceptablility of the material. Infact it is the very first inspection method in Non Destructive Testing methods. Sometimes the Visual Inspection is carried out with aid of additional Instruments and Devices such as Measurement tools & Vision aids. What are essentials for visual Inspection ? Human Eye Lighting Acceptance Criteria Measurement Devices Human Eye So in order to make sure the very essential instrument (EYE) is working properly , it is essential to investigate and make sure, it works properly. So a Visual Acuity Test is recommended Yearly, by most of the standards Visual Acuity commonly referred to as clarity of Vision. It is dependent upon optical and neural factors. i.e., (i) the sharpness of the retinal focus (ii) the health and functioning of retina (iii) the sensitivity of the interpretative faculty of the brain. Vi...