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Photonics Dictionary

spheric lens

A spheric lens, also known as a spherical lens, is a type of optical lens with at least one surface that is part of a sphere. This means that the lens surface is curved in a symmetrical manner, resembling a portion of a sphere. 

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Spheric lenses can be convex (bulging outward) or concave (curving inward) depending on their purpose and the direction of light they need to manipulate. Convex spheric lenses converge light rays, bringing them together to a focal point, and are commonly used in magnifying glasses, eyeglasses for farsightedness (hyperopia), and in camera lenses to focus light onto an image sensor. Concave spheric lenses diverge light rays, spreading them apart, and are used in correcting nearsightedness (myopia) in eyeglasses and in certain optical instruments.

Spheric lenses are characterized by their focal length, which is the distance from the lens to the focal point when parallel light rays are focused. They are also described by their curvature and diameter, which determine their optical properties and applications. Spheric lenses are widely used in various optical systems, including microscopes, telescopes, cameras, and laser systems, for their ability to refract and manipulate light.
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