Optical Measurements

摘要: Publisher Summary This chapter describes a selection of widely used instruments and techniques. Optical can be conveniently thought in two categories: those basically involving image formation (for example, microscopes telescopes) that involve intensity measurement photometers). Many spectrophotometers) both processes, it is convenient to regard these as falling the second, category. The development optical fibers light guides has enormously broadened scope Light sources for use are grouped under headings: conventional or incoherent laser coherent sources. principal characteristics source are: spectral power distribution, luminance radiance, stability output, ease control position. Other factors may have taken into account design an instrument system heat dissipation, nature auxiliary equipment needed, lifetime, cost, replacement.