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convex Dictionary Terms

convergence
1. In optics, the bending of light rays toward each other, as by a convex or positive lens. 2. Turning in the eyes to view a...
collective lens
A convex or positive lens that serves to collect energy and direct it into subsequent system optics.
telescope lens
A telescope lens is a primary optical component of a telescope system that gathers and focuses light to form an image. It is...
Kellner eyepiece
An eyepiece consisting of a planoconvex field lens and a cemented doublet as the eye lens.
Ramsden eyepiece
An eyepiece consisting of two planoconvex lenses of the same focal length, with facing convex surfaces.
meniscus lens
A lens that has one convex surface and the other concave.
cylindrical lens
A cylindrical lens is an optical component that has different curvatures along its two orthogonal axes, resulting in a shape...
planoconvex lens
A lens that has one plane surface and one convex surface.
converging meniscus
A converging lens with one convex and one concave surface.
blocking shaper
A convex, concave or flat cast iron form that is used to shape a soft mold block of optical components.
negative meniscus lens
A negative powered lens with one surface convex and the other concave, the latter having the greater curvature. It also is...
focusing corner cube
A retroreflector that can focus a beam of light, with one planar reflective surface, one spherical and a third that is...
orthoscopic eyepiece
A telescopic eyepiece that produces a field of view between 40° and 50°. The eyepiece consists of a single element...
laser optics
Laser optics refers to a broad category of optical components and systems designed for manipulating and controlling laser...
Gauss lens
A telescope objective with excellent spherochromatic correction, consisting of a meniscus crown and a meniscus flint, both...
radius tool
A metal device of convex or concave curvature to which lens castings or semifinished lenses are cemented with only their...
biconvex lens
A lens having each of its outer faces curved outward.
triple aplanat
A compound lens consisting of two negative lenses of flint glass. A double-convex lens of crown glass is cemented between...
center of curvature
The center of the sphere of which the surface of a lens or mirror forms a portion. Each curved surface of a lens has a...
burning glass
A convex lens that brings an incident bundle of rays to a focus to produce intense heat at the focus.
concavo-convex lens
A lens with one concave surface and one convex surface; synonymous with meniscus.
convex
Convex is an adjective used to describe a surface or shape that curves outward, bulges, or has a rounded and outwardly...
concave
Concave is an adjective used to describe a surface or shape that curves inward or has a hollow or recessed appearance. In...
curvilinear distortion
A lens aberration in which the focal length varies radially outward from the center of the field. It has the effect of...
divergent-meniscus lens
A lens with one surface convex and the other concave, the latter having the greater curvature. It also is known as a...
anamorphoscope
A cylindrical convex viewing mirror used for viewing distorted pictures formed by photographing the reflections of the...
Ritchey-Chretien telescope
A form of Cassegrain telescope having a concave hyperbolic primary and a convex hyperbolic secondary. This form permits the...
double-convex lens
A converging lens with both surfaces convex.
high
In plano work, that property of a surface determining that it is convex and contacts a flat test glass at its center.
focal length
The focal length of a lens is the distance between the lens's optical center (or principal point) and the image sensor or...
convex lens
 convexo-concave lens
lap
A metal tool used to grind lenses with loose abrasive (see diamond cutting tool). The functional surface of the lap is...
lens
A lens is a transparent optical device that focuses or diverges light, allowing it to pass through and form an image. Lenses...
sharp
A term used to describe a convex surface having too short a radius of curvature. To correct this condition, material is cut...
converging lens
Also known as convergent lens or convex lens. A lens that converges an incident bundle of rays to a focus.
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...
optical cement
A permanent, transparent, and highly transmissive adhesive capable of withstanding extreme temperatures that is applied to...
saddle
A term used to describe a saddle-shaped -- i.e., convex along one axis, concave along the other -- polished surface,...
Huygenian eyepiece
An ocular having two planoconvex lenses that are formed from similar glass and that are separated by a space equal to half...
second-side meniscus
The process of grinding the convex surface of a convexo-concave meniscus.
concave and convex spherical mirror
Concave and convex spherical mirrors are types of curved mirrors that have surfaces shaped like segments of spheres. These...

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