Optics: measuring and testing – By shade or color – With color transmitting filter
Reexamination Certificate
2005-03-22
2005-03-22
Toatley, Jr., Gregory J. (Department: 2877)
Optics: measuring and testing
By shade or color
With color transmitting filter
C356S440000, C422S082050
Reexamination Certificate
active
06870624
ABSTRACT:
An apparatus for filtering electromagnetic waves, the apparatus comprising a substrate having a surface relief structure containing at least one dielectric body with physical dimensions smaller than the wavelength of the filtered electromagnetic waves, such structures repeated in a two dimensional array covering at least a portion of the surface of the first substrate. Also disclosed is a material sensor utilizing this apparatus.
REFERENCES:
Cowan, J. J., “Aztec surface-relief volume diffractive structure,”Journal of the Optical Society of America, vol. 7, No. 8, pp. 1529-1544 (Aug. 1990).
Cowan James J.
Hobbs Douglas S.
Coho Holdings LLC
Dingman, Esq. Brian M.
Mirick O'Connell DeMallie & Lougee LLP
Punnoose Roy M.
Toatley , Jr. Gregory J.
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