optical strain gauge

An optical strain gauge is a device used to measure deformation or strain in materials. It works by using light to detect changes in the material's shape. When the material is stretched or compressed, it affects how light travels through or is reflected by the gauge. These changes can be measured very precisely, making optical strain gauges useful in various fields, such as engineering and structural health monitoring. They are often preferred for their high sensitivity and ability to work in harsh environments where traditional gauges might fail.