Glenn D. Boreman – författare
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2 produkter
2 produkter
602 kr
Skickas inom 5-8 vardagar
This second edition introduces the theory and applications of the modulation transfer function (MTF), used to specify the image quality achieved by an imaging system. It starts with the relationship between impulse response and transfer function, and the implications of a convolutional representation of the imaging process. Optical systems are considered first, including effects of diffraction and aberrations on the image, with attention to aperture and field dependences. Then electro-optical systems with focal-plane arrays are considered, with an expanded discussion of image-quality aspects unique to these systems, including finite sensor size, shift invariance, sampling MTF, aliasing artifacts, crosstalk and electronics noise. Various test configurations are then compared in detail, considering the advantages and disadvantages of point-response, line-response and edge-response measurements. The impact of finite source size on the measurement data, and its correction, are discussed. An expanded discussion of the practical aspects of the tilted-knife-edge test is presented. New chapters are included on speckle-based and transparency-based noise targets, and square-wave and bar-target measurements. A range of practical measurement issues are then considered, including mitigation of source coherence, combining MTF measurements of separate subsystems, quality requirements of auxiliary optics, and low-frequency normalization. Some generic measurementinstrument designs are compared, and the book closes with a brief consideration of MTF impacts of motion, vibration, turbulence, and aerosol scattering.
744 kr
Skickas inom 11-20 vardagar
This book is an outgrowth of a short course that the author has presented for SPIE for the past 25 years or so on the fundamentals of infrared sensing. This field spans several technical disciplines, which can leave the beginner with the “where do I start?” question. The selection of the material included here represents those concepts and terminology that a newcomer in the field of infrared systems needs to understand. These include items that were initially confusing to the author, ones that he has found useful in practice, or concepts that are commonly misunderstood. These are explained in the simplest terms that keep the key ideas. The level of mathematics is generally algebra-based. The book contains sample calculations but does not include problem sets. This is a consequence of the book’s origin as a set of short course notes. It is not intended as a stand-alone college textbook but rather as a self-study reference for the beginning systems engineer. The intended audience is a person with a bachelor’s-level training in science or engineering. It is meant to be an introduction, with sufficient detail to enable the reader to make initial back-of-the-envelope calculations and to understand the basic tradeoffs and trends involved.