Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Reexamination Certificate
2006-11-22
2009-11-03
Mack, Ricky L (Department: 2873)
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
C351S221000, C351S246000
Reexamination Certificate
active
07611244
ABSTRACT:
A device to compensate for asymmetrical aberrations in a beam of light includes at least one dual compensator positioned on the beam path. Structurally, the dual compensator includes two juxtaposed plates, each having a same pattern presented thereon. The patterns, however, are rotated through an angle α relative to each other. Together, the plates of the dual compensator can then be rotated on the beam path through an angle β to compensate for asymmetrical aberrations in the light beam. Dual compensators, having appropriate patterns, can be collectively used to compensate for astigmatism, coma and trefoil.
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Acosta Eva et al., “Variable aberration generators using rotated Zernike plates” J Opt Soc Am A; Journal of the Optical Society of America A:Optics and Image Science, and Vision, Sep. 2005 (2005-2009), pp. 1993-1996.
Heidelberg Engineering GmbH
Mack Ricky L
Nydegger & Associates
Thomas Brandi N
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