Optics: measuring and testing – By polarized light examination – With polariscopes
Reexamination Certificate
2007-10-23
2007-10-23
Casler, Brian L. (Department: 3737)
Optics: measuring and testing
By polarized light examination
With polariscopes
C351S215000
Reexamination Certificate
active
10260481
ABSTRACT:
A scanning laser polarimetry (SLP) system that measures in vivo retinal nerve fiber layer (RNFL) retardance (δN, θN) in a single measurement without a variable corneal compensator (VCC). The diagnostic signal is biased so that the detected RNFL retardance orientation angles are sufficiently similar at adjacent pixels in the retinal polarimetric image to permit resolution of the orientation angle ambiguity in a single polarimetric image without repeating the measurement at another signal polarization state. With a simple bias retarder, the effects of anterior segment retardance (δC, θC) can be removed from a single polarimetric image of the retina without a VCC. Alternatively, from two single polarimetric images obtained at two different bias retarder positions, the anterior segment retardance magnitude δCand orientation θCand the RNFL retardance magnitude δNand orientation θNcan all be determined from the peripapillary RNFL image region alone.
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Huang Xiangrun
Zhou Qienyuan
Carl Zeiss Meditec Inc.
Casler Brian L.
Sanders John R
Stallman & Pollock LLP
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