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Bioptics, also known as a bioptic in the singular, and sometimes more formally termed a bioptic telescope, is a term for a pair of vision-enhancement lenses.They magnify between two and six times, and are used to improve distance vision for those with severely impaired eyesight, especially those with albinism.
A fixation disparity is not constant within a certain observer, but can vary depending on the viewing conditions. If test prisms with increasing amount are placed in front of the observer’s eyes, the fixation disparity changes in the eso direction with base-in prisms and in the exo direction with base-out prisms (Fig. 3).
A typical surveying prism with back target. In surveying, a retroreflector—usually referred to as a prism—is normally attached on a surveying pole and is used as a target for distance measurement, for example, a total station. The instrument operator or robot aims a laser beam at the retroreflector. The instrument measures the propagation ...
Isaac Newton (1643–1727) investigated the refraction of light, demonstrating that a prism could decompose white light into a spectrum of colours, and that a lens and a second prism could recompose the multicoloured spectrum into white light. He also showed that the coloured light does not change its properties by separating out a coloured ...
The unwanted interference effects are suppressed by vapour-depositing a special dielectric coating known as a phase-compensating coating on the roof surfaces of the roof prism. These phase-correction coating or P-coating on the roof surfaces was developed in 1988 by Adolf Weyrauch at Carl Zeiss [6] Other manufacturers followed soon, and since ...
Camera lucida in use. A camera lucida is an optical device used as a drawing aid by artists and microscopists.. The camera lucida projects an optical superimposition of the subject being viewed, onto the surface upon which the artist is drawing.
Google Glass can be controlled using the touchpad built into the side of the device. Touchpad: A touchpad, similar to that of one on a laptop, is located on the side of Google Glass, allowing users to control the device by swiping through a timeline-like interface displayed on the screen. [34]
PRISM is a code name for a program under which the ... found that the disclosure of PRISM could cost the U.S. economy between $21.5 and $35 billion in lost ...
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