Zoned lens

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G - Physics

02

B

G02B 3/08 (2006.01) A61F 2/16 (2006.01) G02B 5/08 (2006.01) G02B 5/18 (2006.01) G02C 7/02 (2006.01) G02C 7/04 (2006.01) G02C 7/06 (2006.01)

Patent

CA 2185685

A zoned lens comprises at least two adjacent zones (16) formed such that the differences between the optical path lengths between an object point and a pixel of light beams extending through these two adjacent zones (16) of the lens (15) are at least equal to half the coherence length of the light used, preferably at least equal to the coherence length of the light used.

Une lentille zonée comporte au moins deux zones (16) adjacentes conçues de façon à ce que les différences des longueurs de trajets optiques, entre un point objet et un point image, de rayons lumineux traversant les deux zones adjacentes (16) de la lentille (15) soient au moins égales à la moitié de la longueur de cohérence de la lumière utilisée, et de préférence au moins égales à la longueur de cohérence de la lumière utilisée.

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