An object to be recorded holographically at (an argon-ion laser line) has…

PHYSICS · Multi-part · Fermi University Physics · Optics & Photonics · Fourier optics and image formation · Fourier optics and image formation

What an Instrument Can See, Ch Keeping the phase: holography, wavefront modulation and adaptive optics

Problem

An object to be recorded holographically at

\lambda = 514\ \mathrm{nm}

(an argon-ion laser line) has spatial-frequency content up to

\nu_{\max} = 180

cycles per millimetre. ((a)) Find the minimum reference angle

\theta_R

(to the axis) that satisfies the separation condition

\nu_{\mathrm{car}} \ge 3\nu_{\max}

. ((b)) State the corresponding spatial frequency the recording medium must resolve.