enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Curved mirror - Wikipedia

   en.wikipedia.org/wiki/Curved_mirror

   A curved mirror is a mirror with a curved reflecting surface. The surface may be either convex (bulging outward) or concave (recessed inward). Most curved mirrors have surfaces that are shaped like part of a sphere, but other shapes are sometimes used in optical devices. The most common non-spherical type are parabolic reflectors, found in ...

3. Vergence (optics) - Wikipedia

   en.wikipedia.org/wiki/Vergence_(optics)

   In geometrical optics, vergence describes the curvature of optical wavefronts. [1] Vergence is defined as. where n is the medium's refractive index and r is the distance from the point source to the wavefront. Vergence is measured in units of dioptres (D) which are equivalent to m −1. [1] This describes the vergence in terms of optical power.

4. Cassegrain reflector - Wikipedia

   en.wikipedia.org/wiki/Cassegrain_reflector

   The Cassegrain reflector is a combination of a primary concave mirror and a secondary convex mirror, often used in optical telescopes and radio antennas, the main characteristic being that the optical path folds back onto itself, relative to the optical system's primary mirror entrance aperture. This design puts the focal point at a convenient ...

5. Optical cavity - Wikipedia

   en.wikipedia.org/wiki/Optical_cavity

   Optical cavity. An optical cavity, resonating cavity or optical resonator is an arrangement of mirrors or other optical elements that forms a cavity resonator for light waves. Optical cavities are a major component of lasers, surrounding the gain medium and providing feedback of the laser light. They are also used in optical parametric ...

6. Catadioptric system - Wikipedia

   en.wikipedia.org/wiki/Catadioptric_system

   Catadioptric system. A catadioptric optical system is one where refraction and reflection are combined in an optical system, usually via lenses (dioptrics) and curved mirrors (catoptrics). Catadioptric combinations are used in focusing systems such as searchlights, headlamps, early lighthouse focusing systems, optical telescopes, microscopes ...

7. Rear-view mirror - Wikipedia

   en.wikipedia.org/wiki/Rear-view_mirror

   A rear-view mirror (or rearview mirror) is a, usually flat, mirror in automobiles and other vehicles, designed to allow the driver to see rearward through the vehicle's rear window (rear windshield). In cars, the rear-view mirror is usually affixed to the top of the windshield on a double- swivel mount allowing it to be adjusted to suit the ...