Download Optical metrology by Kjell J. Gåsvik PDF

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By Kjell J. Gåsvik

New fabric on automated optical approaches, automatic ray tracing, and the short Fourier remodel, Bibre-Bragg sensors, and temporal section unwrapping. * New introductory sections to all chapters. * distinctive dialogue on lasers and laser ideas, together with an advent to radiometry and photometry. * Thorough assurance of the CCD digital camera. * End-of-chapter difficulties.

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We also might quote from Laikin (1991): ‘The author’s best advice concerning aspherics is that unless you have to, don’t be tempted to use an aspheric surface’. An important exception is the video disk lens. Such lenses are small with high numerical aperture operating at a single laser wavelength; they cover a very small field and are diffraction limited. A recent trend in the manufacture of these lenses is to injection-mould them in plastic. This has the advantage of light weight and low cost (because of the large production volume) and an aspheric surface may be used.

We set n2 = n2 = 1. (a) Find the power P of the doublet in terms of P1 , P2 and l. (b) Find the first and second focal lengths. 4 Find the power and the locations of the principal planes for a combination of two thin lenses each with the same focal length f > 0 separated by a distance d: (a) where d = f , (b) where d = 3f/4. 5 Show that the combination of two lenses having equal and opposite powers a finite, positive, distance d apart has a net positive power P , and find P as a function of d. 2, is used in air.

These mirrors are cube-corner reflectors in which the reflected beam is parallel to the incoming beam independent of the angle of incidence. If the movable mirror moves with a velocity v1 , the frequency of the reflected light will be Doppler-shifted by an amount f = 2v/λ1 . 38). For two orthogonally polarized waves to interfere, a polarizer has to be placed in front of the detector. A fraction of the laser light of frequencies f1 and f2 is sent to the detector 6, producing a reference signal of frequency f2 − f1 .

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