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Instrument for measuring the roughness of supersmooth surfaces.

B P Hildebrand, R L Gordon, E V Allen

|February 4, 2010

Summary

A new instrument measures scattered light to assess mirror quality. It provides accurate results for both standard and non-standard surfaces, even those not following Gaussian statistics.

Area of Science:

Optical engineering
Surface metrology

Background:

Accurate characterization of optical surfaces is crucial for performance.
Existing methods may have limitations with non-ideal surface statistics.

Purpose of the Study:

To develop and validate a novel instrument for mirror surface analysis.
To assess the instrument's performance with varying surface types.

Main Methods:

The instrument measures relative scattered light magnitudes from a standard and test mirror.
Data reduction theory is based on Gaussian statistics.
Experimental testing was conducted to evaluate performance.

Main Results:

The instrument was successfully built and tested.

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Good results were obtained even with non-Gaussian surfaces.

The instrument demonstrates effectiveness beyond theoretical assumptions.

Conclusions:

The developed instrument is a viable tool for mirror surface characterization.
It offers reliable measurements for a range of surface types.
The findings support the instrument's utility in optical metrology.