Dispersed Hartmann sensor and method for mirror segment alignment and phasing
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United States of America Patent
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Nov 18, 2003
Grant Date -
N/A
app pub date -
Jan 19, 2001
filing date -
Jul 14, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A dispersed Hartmann sensor includes a Hartmann lenslet in combination with a dispersive element, whereby a Hartmann spot formed by light passing through the Hartman lenslet is dispersed parallel to the phase step of the light. The shape of the blur spot can then be examined at many wavelengths. Measuring the size of a discontinuity in the wavefront of light is then performed by forming a single image of the wavefront, dispersing the image in wavelength using a combination of a Hartman lenslet and a dispersive element, and analyzing the dispersed image along a dispersion direction of the dispersed image to measure the size of the discontinuity.
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