Journal ArticleDOI
Partially Coherent Imaging For an Adaptive Optical Frequency Response
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TLDR
In this paper, the amplitude and phase response of an optical viewer is controlled by a variable source size condensing system and an attenuation filter in the pupil of the imaging lens.Abstract:
Optical viewing systems have been well designed for specific applications. However, partial coherence evaluation of the optical viewer illustrates potential for control of the frequency response to phase and amplitude components of the photographic image (where the phase component is due to the emulsion relief image). The complex image formed by the partially coherent system contains a separable response to the phase and amplitude components for a low contrast object. Optical frequency response control is applied to the complex image by design of a variable source size condensing system and by inserting an attenuation filter in the pupil of the imaging lens. Illustrations are given to show the adaptability of the system response to low contrast images.read more
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Book ChapterDOI
Optical image enhancement and image restoration
P. S. Considine,R. A. Gonsalves +1 more
TL;DR: This chapter has presented a brief review of optical image processing and some of its applications.
Journal ArticleDOI
Resolution of optical systems involving smoothened blanks in white light
P.C. Mehta,C. Bhan,R. Hradaynath +2 more
TL;DR: In this article, different smoothened blanks have been studied in partially coherent white light illumination to assess the possible maximum resolutions that can be obtained, where the object can be placed either in contact with the diffuser or can be imaged onto a diffuser.
Image enhancement in a microfilm projection printer utilizing partial coherence and spatial filtering
TL;DR: An optical system was assembled and used to produce enlargements of microfilm images at a magnification of 12-X by means of a spatial filter that transmitted most of the light diffracted by the microfilm negative and absorbed about 60$ of the undiffracted light.
References
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Book
Principles of Optics
TL;DR: In this paper, the authors discuss various topics about optics, such as geometrical theories, image forming instruments, and optics of metals and crystals, including interference, interferometers, and diffraction.
Principles of Optics
TL;DR: In this article, the authors discuss various topics about optics, such as geometrical theories, image forming instruments, and optics of metals and crystals, including interference, interferometers, and diffraction.
Book
An introduction to the theory of random signals and noise
TL;DR: The aim of this book is to clarify the role of noise in the development of linear and nonlinear systems and to provide a procedure forormalising the noise generated by these systems.