Refractive index
A numerical value indicating the light bending power of a medium such as glass. The greater the bending power, the greater the refractive index.
Search SWPP and BPPA
Information provided by: SWPP BPPA
More Photographic Terms ...
Refractive index
A technical term used to describe the effect of a lens in causing light rays to bend; important aspect in lens design.
Reflector ...
refractive index
the deviation of light as it passes through a given substance, given as the ratio of its velocity in a vacuum to its velocity within the substance.
refractometer
an instrument for measuring idices of refraction.
The refractive index of water is different than air, which makes judging distances difficult. Objects viewed through your mask can appear 25% larger than they really are, due to the refractive index difference.
Water absorbs light.
where n is the refractive index of the lens medium. The quantity 1/f is also known as the optical power of the lens.
The corresponding front focal distance is: ...
The refractive index of a substance changes if the temperature changes or if the color of the light used changes.
Nikon has developed a technology to form a coating with very low refractive index even in the vacuum UV (VUV, 200-150nm) region, and greatly improved the angular performance of antireflection coating.
Waves of light travel in straight lines as they pass through air, but when they strike a medium with a greater refractive index (the refractive index of air is 1 and that of water is 1.33), light rays can bend and magnify.
47 The narrow bright halo moves toward the medium of higher refractive index if the focus is raised, and toward the medium of lower refractive index if the focus is lowered.
Essentially a fairly minor upgrade to the popular SD400 (Ixus 50), the SD450 incorporates two UA (Ultra-high Refractive Index Glass Molded (GMo) Aspherical lens) elements which has allowed Canon to produced its smallest cameras yet to feature a 3x ...
Assuming that the lens is surrounded by air or vacuum (refractive index 1.0), the focal length is the distance from the secondary principal point (which in this case is also the secondary nodal point) to the rear focal point of a lens.
-Canada balsam - liquid resin with a refractive index similar to glass. It is used for bonding elements in compound lenses.
-Candela - unit which expresses the luminous intensity of a light source.
Using special oil that bears the same refractive index as film, the film is taped to the drum, which then rotates at high speeds. A laser hits that film and the concentrated light is picked up by the PMT.
The property of materials which have a refractive index that varies according to the wavelength of light, i.e.
Optical glass must be bubble-free and must have a constant refractive index and constant chromatic d
Optical glass
To have a list of TLR cameras, see the Category: TLR. TLR is an acronym for Twin Lens Reflex. What d ...
Each type f optical glass is classified according to its refractive index and light dispersive quality. Two or more types of optical glass are typically used in the component elements of photographic lenses.
The new sensor features a special glass cover that suppresses infrared, and it employs a more highly developed array of low refractive index micro lenses at the sensor edges that are laterally displaced toward the image center to match the imaging ...
It is specially manufactured to be free of defects and distortion, and to withstand heat and humidity. Each type f optical glass is classified according to its refractive index and light dispersive quality. Two or ...
Hot Swappable Provides the option to plug and unplug a computer peripheral or a camera into and out of a USB or FireWire port while the computer is on. HRI HRI stands for High Refractive Index Lens. Find out more.
Fluorite cracks easily and is sensitive to temperature changes that can adversely affect focusing by altering the lens' refractive index.
 See also: Light, Camera, Image, Lens, Lenses
|
