An analytical expression is developed for calculating the irradiance at the focal point of a concave mirror due to radiation emitted by the mirror surface. The mirror is assumed to be a Lambertian emitter. Asymptotic expressions are developed for the case of large f-number systems. These are ...
focal distance- the distance from a lens to its focus focal length distance- the property created by the space between two objects or points Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc. ...
See Focus.] Belonging to,or concerning, a focus; as, a focal point. Focal distance, or length, of a lens or mirror (Opt.), the distance of the focus from the surface of the lens or mirror, or more exactly, in the case of a lens, from its optical center. Focal distance of a ...
Dominance creates a focal point, a focal point creates an entry place into the design of a room, and entering into the design of a room helps us to make sense of the room. And when we can make sense of a room we perceive it as attractive. And we want to have attractive, beautiful ...
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as viewed from a point in the focal plane, beams from separated telescopes must be recombined so that they appear to be coming directly from a single large telescope which has been masked so as to reproduce exactly the ensemble of ... WA Traub - 《Applied Optics》 被引量: 144发表: 1986...
Method and apparatus for maintaining the focal point of a laser beam used for laser machining relative to a workpiece, including an optical distance measuring sensor having a measurement beam, a mirror for combining the measurement and laser beams into a predetermined optical path having a common ...
The focal length is the distance from the mirror to the point where all light that bounces off of the mirror goes through. Concave mirrors have a positive focal length and convex mirrors have a negative focal length. Positive distances are ...
Development of a new concept solar-biomass cogeneration system A Scheffler type mirror is adopted to allow irradiation of the system in a fixed focal point. A Stirling engine, integrated into the fluidized bed, ... Gaetano Continillo,Katarzyna Bizon,G Angrisani,... - 《Energy Conversion & Mana...
A common (but not universally used) approach for the definition of focal lengths of extended systems is based on geometrical optics. For finding the front focal point, one calculates rays which are horizontal on the back side (see Figure 2), using the paraxial approximation. The optical system...