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Examples of real images include the image produced on a detector in the rear of a camera, and the image produced on an eyeball retina (the camera and eye focus light through an internal convex lens). In ray diagrams (such as the images on the right), real rays of light are always represented by full, solid lines; perceived or extrapolated rays ...
A convex mirror diagram showing the focus, focal length, centre of curvature, principal axis, etc. A convex mirror or diverging mirror is a curved mirror in which the reflective surface bulges towards the light source. [1] Convex mirrors reflect light outwards, therefore they are not used to focus light.
A ray tracing diagram for a simple converging lens. A device which produces converging or diverging light rays due to refraction is known as a lens . Thin lenses produce focal points on either side that can be modeled using the lensmaker's equation . [ 5 ]
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.
Bottom: The formation of a virtual image using a convex mirror. In both diagrams, f is the focal point, O is the object, and I is the virtual image, shown in grey. Solid blue lines indicate (real) light rays and dashed blue lines indicate backward extension of the real rays.
The principal ray or chief ray (sometimes known as the b ray) in an optical system is the meridional ray that starts at an edge of an object and passes through the center of the aperture stop. [5] [8] [7] The distance between the chief ray (or an extension of it for a virtual image) and the optical axis at an image location defines the size of ...
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.
For a thin lens in air, the distance from the lens to the spot is the focal length of the lens, which is commonly represented by f in diagrams and equations. 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.