Cantrina Hayslett

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Our primary aim was to document the rate of comorbidity of physician-diagnosed chronic pain conditions in veterans who were seeking treatment for posttraumatic stress disorder (PTSD). Chronic pain diagnoses (e.g., chronic low-back pain and osteoarthritis) were examined with retrospective chart review. Of the patients with PTSD, 66% had chronic pain(More)
The point-diffraction interferometer (PDI) is a simple common-path interferometer capable of measuring optical-path differences (OPD) directly. This interferometer, first described by Smartt in 1972,1,2 has since become available commercially for use in the visible spectrum. Currently activity in laser-fusion and high-energy-laser systems has stimulated(More)
A comparison of the results of three different computer programs for the reduction of interferograms is presented. These programs use either global or local surface fitting or a combination of both and were developed at White Sands Missile Range. The global fitting algorithm uses Zernike polynomials while the local surface fitting algorithm interpolates a(More)
An IR Twyman-Green interferometer is described. It uses a cw CO(2) laser as a light source operating at a 10.6-microm wavelength. Theoretical analysis and experimental measurements of the relationship between the contrast of the interference fringes and the rms roughness of test surfaces are discussed. Interferometric testing results and special alignment(More)
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