The focal length is half the radius of curvature and is as {eq}f=\frac{R}{2} {/eq}, where f is the focal length, and R is the radius of curvature. Convex and Concave Mirrors Convex and concave mirrors are sections of a whole spherical mirror. A concave mirror has a reflecting ...
We found that for a certain common spherical lens, there exists an optimal mirror radius of curvature (ROC), which is different from the focal lengthfof the lens and could minimize the FC-induced defocusing. Therefore, the effective FoV of the CERs can be enhanced by simply optimizing the ...
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Focal length is one of the main properties of a liquid lens. Similar to the solid lens, the focal length of the liquid lens is also based on the radius of meniscus R, the refractive index of the two liquids \(n_{w}\) and \(n_{g}\), and the contact angle \(\theta\). $$f...
The frame origin is P, the first frame axis is the tangent t→=dr→(s)/ds which is a unit vector; the second frame axis is the normal unit vector n→=(dt→(s)/ds)/κ, where κ=|dt→(s)/ds|=1/ρ is the curvature (zero for a line) and ρ is the radius of curvature; ...
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the monolithic nature of the device where the mode conversion occurs (typically 20–60 mm in length) means that, once manufactured, the relationship between the modes excited in the multimode region and the distribution of light in the uncoupled single-mode outputs is deterministic and unchanging...
focal length of the entire system; and a distance-compensation lens group which is separate from the focal-length-varying lens groups and which, during focusing, move in the optical axis direction such that, as a projection distance varies from a remote distance to a close distance, curvature ...
The first lens surface comprises at least two zones designated by successive integers i, the surface being characterized by a sag that varies according to the relationship: Sag=Ci*r21+1-1+Ki*Ci2*r2+∑j=0MBij*r-ri2j+∑j=1MTij*r-ri-12j wherein Ci is a base radius of curvature of...
one set of loading points relative to the other set to control and adjust the radius of curvature and hence the focal length of the mirror. Means are also provided to tilt the mirror, to orient it in a horizontal plane and to orient the line beam it forms to control the angle of ...