ISSN:
1349-9432
Keywords:
interference color
;
optical path difference
;
color scale
;
subspace method
;
parameter estimation
;
orthogonal expansion of pattern vectors
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract A spectral intensity distribution of interference colors which is a function of optical path difference (OPD) is represented as a pattern vector on a subspace. A new algorithm to design a color scale on the subspace to estimate OPD values is proposed. In experiments, interference colors generated by a differential interference microscope (DIM) were examined. A subspace spanned by four orthogonal bases was constructed to make a color scale to determine OPD values in the range between 0 nm and 1000 nm. Estimated OPD values almost coincided with these expected. In an experiment on two-dimensional interference colors obtained by a spherical surface of a ballbearing observed by DIM, the resultant OPD distribution coincided well with that expected within a standard deviation of 12.8 nm.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s10043-998-0207-5
Permalink
