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Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy (oSLO) and Optical Coherence Tomography (OCT)

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X-ray mirror assessment with optical light.

H Kunieda, P J Serlemitsos

|June 10, 2010

Summary

This summary is machine-generated.

Thin foil x-ray mirror imaging was assessed using optical light. Results show image broadening primarily from substrate waviness and slope errors, consistent with x-ray measurements.

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Area of Science:

Optics
Materials Science
X-ray Astronomy

Background:

Thin foil mirrors are crucial for focusing x-rays in astronomical observatories.
Understanding their imaging performance is vital for mission success.
Previous assessments often relied solely on x-ray characterization.

Purpose of the Study:

To evaluate the imaging capability of a thin foil x-ray mirror using optical light.
To quantify contributions of substrate waviness and slope errors to image broadening.
To compare optical measurements with existing x-ray data.

Main Methods:

Optical characterization using a laser beam and a wide optical parallel beam.
Analysis of image broadening in terms of half-power diameter (HPD).
Separation of broadening contributions from substrate waviness and slope errors.

Main Results:

Millimeter-scale substrate waviness (orange peel) contributed 1.2-min of arc HPD broadening over two reflections.
Foil shaping and misalignment-induced slope errors caused an additional 1.6-2.0-min of arc HPD broadening.
Total optical broadening measured was approximately 3-min of arc HPD.

Conclusions:

Optical measurements provide a valuable method for assessing thin foil x-ray mirror performance.
The observed optical broadening is consistent with prior x-ray measurements (2.6-min of arc HPD).
This study validates optical testing as a predictive tool for x-ray mirror quality.