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The prism is also less bulky than the double Porro design. The prism is sometimes simply called a "roof prism", although this is ambiguous, because other roof prisms exist, such as the Amici and Schmidt–Pechan designs. A variant of the Abbe–Koenig prism replaces the "roof" section of the prism with a single mirror-coated reflecting surface.
Roof prism. A roof pentaprism used in Single-lens reflex cameras; the lower right face is the roof ( dach ). A roof prism, also called a Dachkanten prism or Dach prism (from German: Dachkante, lit. "roof edge"), is a reflective prism containing a section where two faces meet at a 90° angle, resembling the roof of a building and thus the name.
Double diffusive convection is a fluid dynamics phenomenon that describes a form of convection driven by two different density gradients, which have different rates of diffusion. [2] Convection in fluids is driven by density variations within them under the influence of gravity. These density variations may be caused by gradients in the ...
Amici prism. An Amici prism, named for the astronomer Giovanni Battista Amici, is a type of compound dispersive prism used in spectrometers. The Amici prism consists of two triangular prisms in contact, with the first typically being made from a medium-dispersion crown glass, and the second from a higher-dispersion flint glass.
The prism cover test ( PCT) is an objective measurement and the gold standard in measuring strabismus, i.e. ocular misalignment, or a deviation of the eye. [1] It is used by ophthalmologists and orthoptists in order to measure the vertical and horizontal deviation and includes both manifest and latent components. [1]
Rolling Stone. [4] Double Vision is the second studio album by the British-American rock band Foreigner, released on 20 June 1978 by Atlantic Records. Recorded between December 1977 and March 1978, it was Foreigner's only album co-produced by Keith Olsen and the last recording with bass guitarist Ed Gagliardi who would be later replaced by Rick ...
Double Vision is a novel by Pat Barker, published in 2003. The Observer described the book as a "strongly written, oddly constructed new novel". References This ...
Double Vision ( Chinese: 雙瞳; pinyin: Shuang tong) is a 2002 action horror film directed by Chen Kuo-fu. The plot is about an FBI agent working with a troubled Taiwanese cop to hunt for a serial killer who is embedding a mysterious black fungus in the brains of the victims. It was screened in the Un Certain Regard section at the 2002 Cannes ...