TABLE OF CONTENTS Daniel Malacara and Zacarias Malacara
Centro de In ?estigaciones en Optica, A.C.
Le n, Gto, Mexico
| B | baseline length |
|
| focal length |
|
| signal frequency |
| b | back focal length |
| I | irradiance |
| N | average group refractive index |
| R | radius of curvature of an optical surface |
| r | radius of curvature of a spherometer ball |
| R | range |
| ? | attenuation coefficient |
| ? | wavelength of light |
| ? | delay time |
In Optical Metrology the purpose is to measure some physical parameters using optical methods. In this chapter we describe the most common procedures for the measurements of length and straightness, angles between plane optical surfaces, and curvature and focal length of lenses and mirrors. We also describe some optical procedures using Doppler shifts to measure velocities. The reader may obtain some more details in the book Optical Shop Testing, D. Malacara (ed.), 2d ed., John Wiley and Sons, New York, 1992, or in Chap. 21 on Interferometers in Vol. II of this Handbook.
Metrology is an activity in which we quantify a physical variable to differentiate a system from another or to analyze the same system under different circumstances. Once a fundamental unit of measurement is defined, several derived units may be obtained. In order to have a common measurement comparison, a standard has to be established, and it must be accessible and invariable.
[1]| Quantity | Name | Symbol |
|---|---|---|
| Length | meter | m |
| Mass | kilogram | kg |
| Time | second | S |
| Electric... |
