Method and apparatus for determining the wavelength of an...

Details Method and apparatus for determining the wavelength of an... Method and apparatus for determining the wavelength of an...

2007-10-09

2007-10-09

Lee, Hwa (Andrew) (Department: 2886)

Optics: measuring and testing

By light interference

Spectroscopy

C356S477000

Reexamination Certificate

active

10672889

ABSTRACT:
A method and apparatus for measuring the wavelength of an input light beam whereby the input light beam is split into two light beams which are directed through two paths of different optical length. The light beams are interfered with each other in order to form a fringe pattern at an observation plane, which fringe pattern is detected and analyzed to thereby determine the wavelength of the input light beam.

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Katherine Creath, “Phase-Measurement Interferometry Techniques,” inProgress in OpticsXXXVI, E. Wolf, ed. (North-Holland, Amsterdam, 1988), 349-393).

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