Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2006-06-20
2006-06-20
Luu, Thanh X. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C250S227140, C250S23700G, C385S012000
Reexamination Certificate
active
07064315
ABSTRACT:
The method and the device are used for compensating for interfering variables in an optical sensor (50), which is at least sensitive with respect to a measured variable (M), a wavelength (λ) of the optical signal (S1) fed in and an interfering variable (T). The optical signal (S1) also passes through a compensation element (40) which, together with the optical sensor (50), is located in a common interfering variable effect range (60) with the same effect of the interfering variable (T). In the compensation element (40), the interfering variable (T) changes the wavelength of the optical signal (S1) in such a way that the partial influences that take place in the optical sensor (50) on account of the changed wavelength and on account of the interfering variable (T) cancel one another out.
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Luu Thanh X.
Siemens Aktiengesellschaft
Staas & Halsey , LLP
Yam Stephen
LandOfFree
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