Appeal No. 1998-1814 Page 2
Application No. 08/347,814
BACKGROUND
The appellants’invention relates to a dual modulation
laser line-locking technique for wavelength modulation. An
understanding of the invention can be derived from a reading
of exemplary claims 110, 117, 119, and 121, which are
reproduced as follows:
110. Optical spectroscopy apparatus providing
wavelength stabilization and improved precision and accuracy
of optical absorbance measurements, the apparatus comprising:
light source means for producing a light beam;
modulator means for modulating a wavelength of said light
source means, said modulator means comprising means for
simultaneously modulating said wavelength with a first
frequency and a second frequency, said first frequency being
different than said second frequency; and
detector means positioned to receive said light beam for
producing output signal means comprising signal means
representative of an absorber species quantity and wavelength
stabilization means of said light source means.
117. The invention of claim 110 further comprising
demodulator means for demodulating said output signal means.
119. The invention of claim 117 wherein said
demodulator means comprises first and second demodulator
means.
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