The Wavelength Diversity of Speckle,
Abstract
A unified analysis is presented for the spatial and the spectral sensitivity of speckle (the rapid spatial variations which occur in an image when illumination of narrow spectral width is used) in a space-invariant linear system. In prior work considering speckle size, others have shown that its spatial variation is functionally dependent primarily on the autocorrelation function of the system's impulse response, but effects of varying the frequency were largely ignored. In the present the general problem is treated in which a diffuse object, illuminated by a collimated, monochromatic beam, is imaged by a system whose amplitude impulse response is z(x,nu), where x and nu are a space and normalized frequency coordinates, respectively. Examples are presented; and it is shown that one can infer valuable information about the variation of heights for points on the surface of the input diffuse object which are separated by much less than the classical resolution limit. (Modified author abstract)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1974
- Accession Number
- AD0778436
Entities
People
- Atul Jain
- Nicholas George
Organizations
- California Institute of Technology