US 2006/0139746 A1Published application

Optical device for observing samples on a support, designed in particular for a cytometer

OwnerMichel Delaage, Pierre Delaage +2inventors

InventorsMichel Delaage, Pierre Delaage, Michel Lequime, Jean-Michel Decaudin

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Abstract

An optical device (12) includes a front surface located on the side of the sample to be observed and a rear surface oriented towards the elements for acquiring (18, 19) an image or a user. It further includes a combination of four aligned lenses. The lenses are arranged in the following sequence from the front rearwards: a plano-convex lens (28), a convexo-concave lens (30), a plano-concave lens (32) and a biconvex lens (34). The plano-concave (32) and the plano-convex lenses are respectively such that they each have a substantially planar surface and a concave surface or convex surface respectively. The invention is applicable to a cell analyzer.

Claims20

Dependent claims

Optical device (12) adapted particularly for the observation of specimens on a support (4) in the field of biology, comprising a front surface located on the side of the specimen or the like, to be observed and a rear surface oriented toward acquisition means (18, 19) of an image or a user,

characterized in that it comprises a combination of four aligned lenses and in that the lenses are disposed in the following order from front to rear:
a plano-convex lens (28), a divergent meniscal lens (30), a plano-concave lens (32) and a bi-convex lens (44), the plano-concave lens (32) and plano-convex lens (48) respectively being such as each to have on the one hand a substantially flat surface and on the other hand a respective concave or convex surface.

Dependencies are inferred from the claim text.