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4500PC08

# 4500PC08 - Circle of Least Confusion A biconvex lens is...

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Unformatted text preview: Circle of Least Confusion A biconvex lens is used to focus a plane wave that is propagating on—axis (light traveling parallel to the axis of lens). The lens has a 32 mm diameter lens with n = 1.5, R1 = 50 mm, and R2 = 50 mm as shown in the attached ﬁgures. An aperture stop is placed immediately in front of this lens. Ignoring diffraction effects, determine for this lens the range of f—numbers which produce a circle of least confusion of 1.0mm or less. Show all work. Put your answer in the space provided. Range of f—numbers: < f — no. < BICONVEX LENS A biconvex lens has radii of curvature of R1 and R2, a center thickness of d, and an index of refraction 72. If R1 and R2 are taken to be magnitudes, the focal distance of this biconvex lens in air for an axial ray of distance h from the principal axis is MWwsin[sin-1<.gg_sm—1<n%>i+%}/ [({<_)[<—><—>1—}> _(sm—1{ (Riga _ d) Man—1%) ~ Whig] + 71%) + [Sm-1e) 41%)“ L_l 5mm Fig. 1. Focusing of rays by biconvex lens showing spherical aberration. ...
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4500PC08 - Circle of Least Confusion A biconvex lens is...

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