What is optical measurement?

Optical measurement refers to noncontact measurement using various light sources. It usually requires at least one lens, a light source and a detector.

Whats the definition of optic?

Definition of optic (Entry 2 of 2) 1 : eye. 2a : any of the elements (such as lenses, mirrors, or light guides) of an optical instrument or system —usually used in plural. b : an optical instrument.

How many types of optics are there?

There are two major branches of optics, physical and geometrical. Physical optics deals primarily with the nature and properties of light itself. Geometrical optics has to do with the principles that govern the image-forming properties of lenses, mirrors, and other devices that make use of light.

What is optic analysis?

OPTIC. OPTIC is an acronym that helps you understand how to analyze visual texts: O is for Overview: What the picture is of, your first impression? P is for parts: color, scale, shape, size, orientation/direction. T is for the title: What did the author call it?

How does digital image correlation work?

DIC works by comparing digital photographs of a component or test piece at different stages of deformation. By tracking blocks of pixels, the system can measure surface displacement and build up full field 2D and 3D deformation vector fields and strain maps.

How does 3D measurements work?

3D measurement is a process in which various types of equipment collect 3D data on physical objects, including their shape, sizes and colours, to construct and analyze digital 3D models with high-density point clouds or triangle meshes.

What is geometrical optics?

As a mathematical study, geometrical optics emerges as a short- wavelength limit for solutions to hyperbolic partial differential equations (Sommerfeld–Runge method) or as a property of propagation of field discontinuities according to Maxwell’s equations (Luneburg method).

What are the limitations of geometrical optics?

Geometrical optics does not account for certain optical effects such as diffraction and interference. This simplification is useful in practice; it is an excellent approximation when the wavelength is small compared to the size of structures with which the light interacts.

What is the origin of equation of geometrical optics?

The method of obtaining equations of geometrical optics by taking the limit of zero wavelength was first described by Arnold Sommerfeld and J. Runge in 1911. Their derivation was based on an oral remark by Peter Debye. Consider a monochromatic scalar field

What is a ray in geometric optics?

The ray in geometric optics is an abstraction useful for approximating the paths along which light propagates under certain circumstances. The simplifying assumptions of geometrical optics include that light rays: may be absorbed or reflected.