IMMERSION MICROSCOPE OBJECTIVE
First Claim
Patent Images
1. An immersion microscope objective comprising:
- a first lens group that includes a meniscus lens component that is the closest to an image among lens components of the first lens group, the meniscus lens component having a convex surface facing an object; and
a second lens group that is closer to the image than the first lens group is, whereinthe immersion microscope objective satisfies the following conditional expressions;
1.4<
NAob≤
1.51
(1)
1.30 mm≤
Yreso×
NAob8
(2)
Ltotal≤
65 mm
(10)where NAob indicates a numerical aperture of an object side of the immersion microscope objective, Yreso indicates a maximum object height within a region on a plane orthogonal to an optical axis that crosses a position on the optical axis at which an RMS wave aberration in a d line is minimized, the region having an RMS wave aberration in the d line that is 0.1λ
d or less provided therewithin, λ
d indicates a wavelength of the d line, and Ltotal indicates a distance on the optical axis from an object surface to a lens surface that is closest to the image among lens surfaces of the immersion microscope objective.
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Abstract
An immersion microscope objective includes: a first lens group that includes a meniscus lens component that is the closest to an image in the first lens group, the meniscus lens component having a convex surface facing an object; and a second lens group, the objective satisfying the following conditional expressions:
1.4<NAob≤1.51 (1)
1.30 mm≤Yreso×NAob8 (2)
Ltotal≤65 mm (10)
- where NAob indicates the numerical aperture of the objective; Yreso a maximum object height within a region on a plane orthogonal to an optical axis that crosses a position on the optical axis at which an RMS wave aberration in a d line is minimized, the region having an RMS wave aberration in the d line that is 0.1λd or less provided therewithin; λd, the wavelength of the d line; Ltotal, a distance on the optical axis from an object surface to the lens surface that is the closest to the image.
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Citations
19 Claims
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1. An immersion microscope objective comprising:
-
a first lens group that includes a meniscus lens component that is the closest to an image among lens components of the first lens group, the meniscus lens component having a convex surface facing an object; and a second lens group that is closer to the image than the first lens group is, wherein the immersion microscope objective satisfies the following conditional expressions;
1.4<
NAob≤
1.51
(1)
1.30 mm≤
Yreso×
NAob8
(2)
Ltotal≤
65 mm
(10)where NAob indicates a numerical aperture of an object side of the immersion microscope objective, Yreso indicates a maximum object height within a region on a plane orthogonal to an optical axis that crosses a position on the optical axis at which an RMS wave aberration in a d line is minimized, the region having an RMS wave aberration in the d line that is 0.1λ
d or less provided therewithin, λ
d indicates a wavelength of the d line, and Ltotal indicates a distance on the optical axis from an object surface to a lens surface that is closest to the image among lens surfaces of the immersion microscope objective. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification