Search results
Results From The WOW.Com Content Network
This list covers optical lens designs grouped by tasks or overall type. The field of optical lens designing has many variables including the function the lens or group of lenses have to perform, the limits of optical glass because of the index of refraction and dispersion properties, and design constraints including realistic lens element center and edge thicknesses, minimum and maximum air ...
Gradient-index optics. A gradient-index lens with a parabolic variation of refractive index ( n) with radial distance ( x ). The lens focuses light in the same way as a conventional lens. Gradient-index ( GRIN) optics is the branch of optics covering optical effects produced by a gradient of the refractive index of a material.
As one example, if there is free space between the two planes, the ray transfer matrix is given by: = [], where d is the separation distance (measured along the optical axis) between the two reference planes.
Optical lens design is the process of designing a lens to meet a set of performance requirements and constraints, including cost and manufacturing limitations. Parameters include surface profile types (spherical, aspheric, holographic, diffractive, etc.), as well as radius of curvature, distance to the next surface, material type and optionally tilt and decenter.
Scientist using an optical microscope in a laboratory. The optical microscope, also referred to as a light microscope, is a type of microscopethat commonly uses visible lightand a system of lensesto generate magnified images of small objects. Optical microscopes are the oldest design of microscope and were possibly invented in their present ...
Light being refracted by a spherical glass container full of water. Roger Bacon, 13th century. Lens for LSST, a planned sky surveying telescope. The word lens comes from lēns, the Latin name of the lentil (a seed of a lentil plant), because a double-convex lens is lentil-shaped. The lentil also gives its name to a geometric figure.
Kerr-lens modelocking. Kerr-lens mode-locking ( KLM) is a method of mode-locking lasers via the nonlinear optical Kerr effect. This method allows the generation of pulses of light with a duration as short as a few femtoseconds . The optical Kerr effect is a process which results from the nonlinear response of an optical medium to the electric ...
Breathing originally referred to any geometric change in field-of-view when changing focus distance. Even if the angle-of-view is constant, distortion changes will cause visible breathing. It has been recently used by photographers for changes of focal length [1] of a lens when changing the focus. Breathing is sometimes used for the suction and ...