OPTICAL IMAGING AND
SPECTROSCOPY
OPTICAL IMAGING AND
SPECTROSCOPY
DAVID J. BRADY
Duke University, Durham, North Carolina
Copyright # 2009 by John Wiley & Sons, Inc. All rights reserved.
Co-published by John Wiley & Sons, Inc., and The Optical Society of America
No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form
or by any means, electronic, mechanical, photocopying, recording, scanning, or otherwise, except as
permitted under Sections 107 or 108 of the 1976 United States Copyright Act, without either the prior
written permission of the Publisher, or authorization through payment of the appropriate per-copy fee
to the Copyright Clearance Center, Inc., 222 Rosewood Drive, Danvers, MA 01923, 978-750-8400,
fax 978-750-4470, or on the web at www.copyright.com. Requests to the Publisher for permission
should be addressed to the Permissions Department, John Wiley & Sons, Inc., 111 River Street, Hoboken,
NJ 07030, 201-748-6011, fax 201-748-6008, or online at http://www.wiley.com/go/permission.
Limit of Liability/Disclaimer of Warranty: While the publisher and author have used their best efforts
in preparing this book, they make no representations or warranties with respect to the accuracy or
completeness of the contents of this book and specifically disclaim any implied warranties of
merchantability or fitness for a particular purpose. No warranty may be created or extended by sales
representatives or written sales materials. The advice and strategies contained herein may not be suitable
for your situation. You should consult with a professional where appropriate. Neither the publisher nor
author shall be liable for any loss of profit or any other commercial damages, including but not limited
to special, incidental, consequential, or other damages.
For general information on our other products and services or for technical support, please contact
our Customer Care Department within the United States at 877-762-2974, outside the United States
at 317-572-3993 or fax 317-572-4002.
Wiley also publishes its books in variety of electronic formats. Some content that appears in print may
not be available in electronic format. For more information about Wiley products, visit our web site at
www.wiley.com.
Library of Congress Cataloging-in-Publication Data:
Brady, David Jones, 1961-
Optical imaging and spectroscopy / David Jones Brady.
p. cm.
Includes bibliographical references and index.
ISBN 978-0-470-04823-8 (cloth)
1. Optical spectroscopy. 2.
I. Title.
QC454.O66B73 2008
621.36—dc22
Imaging systems. 3.
Image processing. 4. Optical instruments
2008036200
Printed in the United States of America
10 9
8 7
6 5
4 3 2
1
To the Taxpayers of the
United States of America
CONTENTS
Preface
Acknowledgments
Acronyms
1 Past, Present, and Future
1.1 Three Revolutions / 1
1.2 Computational Imaging / 3
1.3 Overview / 6
1.4 The Fourth Revolution / 8
Problems / 9
2 Geometric Imaging
Imaging Systems / 28
2.1 Visibility / 11
2.2 Optical Elements / 14
2.3 Focal Imaging / 22
2.4
2.5 Pinhole and Coded Aperture Imaging / 31
2.6 Projection Tomography / 41
2.7 Reference Structure Tomography / 47
Problems / 50
3 Analysis
3.1 Analytical Tools / 55
3.2 Fields and Transformations / 56
xiii
xv
xvii
1
11
55
vii
viii
CONTENTS
3.3 Fourier Analysis / 59
3.4 Transfer Functions and Filters / 64
3.5 The Fresnel Transformation / 67
3.6 The Whittaker–Shannon Sampling Theorem / 72
3.7 Discrete Analysis of Linear Transformations / 75
3.8 Multiscale Sampling / 79
3.9 B-Splines / 89
3.10 Wavelets / 96
Problems / 100
4 Wave Imaging
4.1 Waves and Fields / 103
4.2 Wave Model for Optical Fields / 104
4.3 Wave Propagation / 106
4.4 Diffraction / 109
4.5 Wave Analysis of Optical Elements / 115
4.6 Wave Propagation Through Thin Lenses / 121
4.7 Fourier Analysis of Wave Imaging / 124
4.8 Holography / 130
Problems / 141
5 Detection
5.1 The Optoelectronic Interface / 147
5.2 Quantum Mechanics of Optical Detection / 148
5.3 Optoelectronic Detectors / 153
5.3.1 Photoconductive Detectors / 153
5.3.2 Photodiodes / 159
5.4 Physical Characteristics of Optical Detectors / 162
5.5 Noise / 165
5.6 Charge-Coupled Devices / 170
5.7 Active Pixel Sensors / 176
5.8
Problems / 183
Infrared Focal Plane Arrays / 178
103
147
6 Coherence Imaging
187
6.1 Coherence and Spectral Fields / 187
6.2 Coherence Propagation / 190
6.3 Measuring Coherence / 198
CONTENTS
ix
6.3.1 Measuring Temporal Coherence / 198
6.3.2 Spatial Interferometry / 201
6.3.3 Rotational Shear Interferometry / 204
6.3.4 Focal Interferometry / 209
6.4 Fourier Analysis of Coherence Imaging / 216
6.4.1 Planar Objects / 217
6.4.2 3D Objects / 219
6.4.3 The Defocus Transfer Function / 224
6.5 Optical Coherence Tomography / 227
6.6 Modal Analysis / 231
6.6.1 Modes and Fields / 231
6.6.2 Modes and Coherence Functions / 234
6.6.3 Modal Transformations / 236
6.6.4 Modes and Measurement / 243
6.7 Radiometry / 245
6.7.1 Generalized Radiance / 245
6.7.2 The Constant Radiance Theorem / 247
Problems / 248
7 Sampling
253
Image Plane Sampling on Electronic Detector Arrays / 255
7.1 Samples and Pixels / 253
7.2
7.3 Color Imaging / 268
7.4 Practical Sampling Models / 272
7.5 Generalized Sampling / 276
7.5.1 Sampling Strategies and Spaces / 277
7.5.2 Linear Inference / 282
7.5.3 Nonlinear Inference and Group Testing / 284
7.5.4 Compressed Sensing / 288
Problems / 294
8 Coding and Inverse Problems
299
8.1 Coding Taxonomy / 299
8.2 Pixel Coding / 304
8.2.1 Linear Estimators / 305
8.2.2 Hadamard Codes / 306