Introduction to Optical Metrology (Optical Sciences and by Rajpal S. Sirohi

By Rajpal S. Sirohi

Introduction to Optical Metrology examines the idea and perform of varied size methodologies using the wave nature of sunshine. The e-book starts through introducing the topic of optics, after which addresses the propagation of laser beams via loose house and optical platforms. After explaining how a Gaussian beam propagates, easy methods to arrange a collimator to get a collimated beam for experimentation, and the way to discover and list optical indications, the text:

  • Discusses interferometry, speckle metrology, moiré phenomenon, photoelasticity, and microscopy
  • Describes the several ideas used to degree the refractive indices of solids, drinks, and gases
  • Presents tools for measuring curvature, focal size, attitude, thickness, speed, strain, and length
  • Details thoughts for optical checking out in addition to for making fiber optic- and MEMS-based measurements
  • Depicts a wave propagating within the confident z-direction by way of ei(ωt – kz), in place of ei(kz – ωt)

Featuring workout difficulties on the finish of every bankruptcy, Introduction to Optical Metrology offers an utilized knowing of crucial optical size options, innovations, and procedures.

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Extra resources for Introduction to Optical Metrology (Optical Sciences and Applications of Light)

Example text

Applying the boundary conditions and using Snell’s law of refraction, the reflection and transmission coefficients can be obtained. 61) Further, it can be shown that µt = 1 − r and t ⊥ = 1 + r⊥. The fraction of power of the incident wave reflected and transmitted is called reflectance and transmittance, respectively. 66) This gives µ = tan θB. The angle θB is called the Brewster angle. This equation suggests a simple method to measure the refractive index of a transparent substance with respect to air.

42) where ϕx and ϕy are the phases associated with the x- and y-components of the electric field, respectively. Both Ex and Ey are functions of time and are oscillating with frequency v (=ω/2π). 43) where the phase difference ϕ is ϕ = ϕx − ϕy. This is the equation of an ellipse in a nonstandard form. The tip of the electric field vector traces an ellipse at any fixed z position. This is called an elliptically polarized light. However, the state of polarization is determined by the shape of the ellipse, that is, by the direction of the major axis and the ellipticity.

The propagation of a ray of light is governed by Snell’s law of refraction. There are several optical components that are bound by plane surfaces: examples include PPP, wedge plate, and prisms. 1 Plane Parallel Plate A plate bounded by two plane/flat surfaces, which are parallel to each other constitutes a PPP. It has two main functions, namely, to provide two beams of nearly same 25 Introduction to Optics amplitude but with a path difference and to shift the beam laterally or longitudinally. PPPs are used as beam splitters in interferometers and also as compensators.

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