Download Introduction to infrared system design by William L. Wolfe PDF

By William L. Wolfe

This educational textual content specializes in the optics and detector facets of infrared method layout. It introduces the terminology, techniques, and software layout options to be had to engineers at the present time. layout examples are in keeping with actual difficulties investigated by means of the writer in the course of his 30 years of expertise as an industrialist, instructor, and consultant.

Contents

- Preface
- Symbols and Notation
- Introduction
- purposes Overview
- overview of Geometric Optics
- evaluation of Radiometry
- Detector Parameters
- The Infrared System
- Atmospheric Transmission and Radiation
- review of the Infrared Scene
- Bandwidth and test Strategies
- Optical Materials
- a few Optical Systems
- Scanning Systems
- Real-Time Imager Descriptions
- layout Examples
- Appendix A: determine Programs
- Appendix B: instance Programs
- Bibliography
- Index

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Extra info for Introduction to infrared system design

Sample text

It is our main source of light. Its spectral distribution is shown in Fig. 8-3. The sky is an important radiator in the infrared. The amount of radiation is a function of the spectral region, the local content of the atmosphere, and the Solar Spectral Irradiance Outside Atmosphere rE Solar Spectral Irrudunce at Sea Level lm I I . = 1) Curve for Blackbody at 5900 K 03 H 2O 02, H 2O µ 1. 0 a II ll f H2O, cot ll 0 . 2 Wavelength I Sm) Figure 8-3. org/terms The Infrared Scene 48 zenith or nadir angle of view.

4 Detector Arrays Early infrared imaging devices used a single detector and scanned it over the field of view, registering the signal on a point-by-point basis. As a result of progress in the semiconductor industry, and in particular with charge-coupled devices, there are now two-dimensional detector arrays that can accomplish this function without scanning. Although not all imaging functions can now be accomplished by such staring arrays, they have become extremely important in infrared imaging.

12) where K is a proportionality constant dependent upon the detector, a is a constant close to 2, and (3 is a constant approximately equal to 1. That really is empirical! org/terms Detector Parameters 26 These noises are shown asymptotically and in an idealized form in the accompanying log-log plot, Fig. 5-1. There is no significance in the magnitude of any of them, for they change positions with different detectors and different flux densities. 3 Detector Types Detectors can be categorized in two different ways: by the mechanisms of their transduction and by their areal characteristics.

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