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US 12,730,304 B2Granted
Infinity-corrected microscope objective for scanning applications
AssigneeCarl Zeiss Microscopy GmbH
InventorsDaniel Werdehausen, Yueqian Zhang
Life of this patent
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Abstract
An infinity-corrected microscope objective for scanning applications has a relatively small number of lenses that are dependent on the etendue such that the objective has: i) a first etendue in the range of 0.8 mm2 to 1.8 mm2 and a maximum of nine lenses; or ii) a second etendue in the range of more than 1.8 mm2 and not more than 15 lenses.
Claims20
A microscope objective, comprising:
- a first lens group with a positive refractive power;
- a second lens group with a positive refractive power;
- and
- a third lens group with a negative refractive power,
- wherein the microscope objective:
- has a numerical aperture of at least 0.9;
- has less than 5% vignetting;
- is apochromatically corrected over a spectral bandwidth of at least 200 nanometers (nm);
- i) has an etendue in the range of 0.8 square millimeters (mm2) to 1.8 mm2, and the microscope objective comprises at most nine lenses;
- or ii) has an etendue in of from 1.8 mm2, and the microscope objective comprises at most 15 lenses;
- and
- is an infinity-corrected microscope objective configured to be used in scanning applications.
9 more elements
Dependencies are inferred from the claim text.