apertures Definition

inlets, orifices, vents, holes, openings, gaps, clearings, hatches, ports, outlets, opportunities, magnifications, overtures, collimator, detents, focal length, geometries, vignetting, chromatic aberration, radii, nosepiece, convex lens, micrometer, vanes, venturi, parabolic reflector, louvres, diameters, birefringence, countersunk, photodiodes, collimation, platen, waveguide, passband, workpiece, chamfer, capacitances, diffraction grating, fundus, pentaprism, microchannel, nozzles, dihedral, diffraction, serrations, viewfinder, stiction, toroidal, aerofoil, stroboscope, airfoils, keyways, monochromator, micrometre, formes, resonators, obscuration, bevels, waviness, galvo, curvatures, inductances, lamella, illuminance, micrometres, fovea, phototransistor, windings, convex, cogging, bypass capacitor, microns, velocities, handwheel, sulcus, pinna, concentricity, jambs, actuator, slits, mev, gratings, crystallographic, pellicle, etalon, directivity, hysteresis, volute, auditory canal, perforations, pinhole, laminations, ostia, autofluorescence, dipole moment, airflow, planarity, spheroids, swage,