Search results
Results from the WOW.Com Content Network
Original file (2,520 × 2,520 pixels, file size: 50 KB, MIME type: image/png) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
A lens contained between two circular arcs of radius R, and centers at O 1 and O 2. In 2-dimensional geometry, a lens is a convex region bounded by two circular arcs joined to each other at their endpoints. In order for this shape to be convex, both arcs must bow outwards (convex-convex). This shape can be formed as the intersection of two ...
An extended hemispherical lens is a special type of plano-convex lens, in which the lens's curved surface is a full hemisphere and the lens is much thicker than the radius of curvature. Another extreme case of a thick convex lens is a ball lens, whose shape is completely round. When used in novelty photography it is often called a "lensball".
English: Ray diagram of an imperfect convex lens L, showing the circle of confusion (C). In a perfect lens, light rays entering the lens parallel to the axis pass through a single point, the focal point. However, if the lens has flaws or aberrations, the rays don't pass through a single point.
English: Ray diagram of a convex lens focusing light rays. In a flawless convex lens L with no aberrations all the light rays entering the lens parallel to the axis will converge to a point, the focal point F. Due to diffraction the light at F isn't actually concentrated in a point but occupies a finite sized spot.
A 3 mm ball lens can magnify an image 100 to 200 times, while a 1 mm ball will produce images 200 to 350 times larger than their actual size. [3] In addition, because they are omnidirectional and have large aperture for their focal length, ball lenses convert such images into Bessel wavefronts , which have reduced diffraction effects and can be ...
An axicon is a specialized type of lens that has a conical surface. An axicon transforms a laser beam into a ring shaped distribution. [1] They can be convex or concave and be made of any optical material. The combination with other axicons or lenses allows a wide variety of beam patterns to be generated.
A diagram representing a convex mirror, which shows its focus, focal length, center of curvature, and the principal axis. It enables the viewer to visualize how the mirror looks and functions. It enables the viewer to visualize how the mirror looks and functions.