Search Results - Focal plane
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The cardinal points and the associated cardinal planes are a set of special points and planes in an optical system, which help in the analysis of its paraxial properties. The analysis of an optical system using cardinal points is known as Gaussian optics, named after Carl Friedrich Gauss. The cardinal points and planes of an optical system include For a lens, there will be two of each of these, identified by "front" and "rear" depending on whether they are on the input or the output side of the lens, respectively. These points and planes, together with the aperture stop, and the chief and marginal rays of the system, define the locations and sizes of the entrance and exit pupils of the system, as well as its other image-forming properties, such as the focal length and magnification.
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Showing 1 to 6 of 6 Articles matching 'Focal plane' in related articles. |
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1. Things To Do When In Brussels
March 02, 2010
brussels accommodation, brussels airline, brussels airlines, brussels guide, brussels hostel
At the hub of European politics - Brussels is the cosmopolitan capital of bureaucracy. But when freed from the shackles of red tape, this compact capital of Belgium is a fascinating fusion of profound historical curiosity and contemporary living.
1. The Grand-Place Brussels' central square is the focal point of activity for locals and tourists alike. The heaving markets are bursting with souvenir-seeking bargain hunters. Look out for the town hall (Hotel de Ville), a magnificent example of 1... (read more)
Author: Ernest Cobb
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2. The achromatic telescope is a refracting telescope
February 02, 2010
The achromatic telescope is a refracting telescope that uses an achromatic lens to correct for chromatic aberration. When an image passes through a lens, the light is refracted at different angles for different wavelengths. This produces focal lengths that are dependent on the color of the light. So, for example, at the focal plane an image may be focused at the red end of the spectrum, but blurred at the blue end. This effect is particularly noticeable the further an object lies from the central axis of the telescope. The image of a star can appear blue on one side and orange on the othe... (read more)
Author: Simon suen
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3. The achromatic telescope is a refracting telescope
February 02, 2010
The achromatic telescope is a refracting telescope that uses an achromatic lens to correct for chromatic aberration. When an image passes through a lens, the light is refracted at different angles for different wavelengths. This produces focal lengths that are dependent on the color of the light. So, for example, at the focal plane an image may be focused at the red end of the spectrum, but blurred at the blue end. This effect is particularly noticeable the further an object lies from the central axis of the telescope. The image of a star can appear blue on one side and orange on the othe... (read more)
Author: simon suen
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4. Hyperbolic mirrors are intended to form image of object in focal plane
January 27, 2010
Hyperbolic mirrors are intended to form image of object in focal plane, and normally are used in astronomy telescopes, as well as other optical systems demanding broadband reflection and excellent photographic effect. For example, R-C telescopes utilize two hyperbolic mirrors as the primary and secondary mirror, which correct for coma, which also results in a smaller spot size on and off axis; Cassegrain telescopes have a primary parabolic mirrors focusing its rays onto a convex hyperbolic secondary mirror, which yields excellent correction over... (read more)
Author: Simon suen
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5. Hyperbolic mirrors are intended to form image of object in focal plane
January 27, 2010
Hyperbolic mirrors are intended to form image of object in focal plane, and normally are used in astronomy telescopes, as well as other optical systems demanding broadband reflection and excellent photographic effect. For example, R-C telescopes utilize two hyperbolic mirrors as the primary and secondary mirror, which correct for coma, which also results in a smaller spot size on and off axis; Cassegrain telescopes have a primary parabolic mirrors focusing its rays onto a convex hyperbolic secondary mirror, which yields excellent correction over... (read more)
Author: simon suen
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6. Photography tips
August 04, 2009
There are various forms of photography; they include fine art photography, food photography, fashion, nude, forensic, travel, sports etc, among many others. The various controls in a camera include focus, aperture, white balance, shutter speed, metering, ISO speed, and auto-focus point. Camera controls are inter-related. The total amount of light reaching the film plane changes with the duration of exposure, aperture of the lens, and, and the effective focal length of the lens. Changing any of these controls can alter the exposure. Many cameras may be set to adjust most or all of these control... (read more)
Author: luxi ajkut
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