Title:
MICROSCOPE OBJECTIVE LENS, MICROSCOPE DEVICE, AND MICROSCOPE OPTICAL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/215311
Kind Code:
A1
Abstract:
A microscope objective lens (OL) includes a first lens group (G1) and a second lens group (G2) arranged in order from the object side. The first lens group (G1) has positive refractive power and converts luminous flux from an object into convergent luminous flux. The second lens group (G2) has negative refractive power and converts the convergent luminous flux from the first lens group (G1) into parallel luminous flux. The microscope objective lens (OL) satisfies the following conditional expression: 14.0 ≤ NA x f 1.0 < H1 / H0
Where NA is the numerical aperture of the microscope objective lens (OL); f is the focal distance of the microscope objective lens (OL); H1 is the maximum value of the height of marginal rays from an on-axis object point of the first lens group (G1); and H0 is the height of marginal rays on the lens surface closest to the image side of the second lens group (G2).
Inventors:
KUSUI YUTA (JP)
TAKASAGO KAZUHIRO (JP)
TAKASAGO KAZUHIRO (JP)
Application Number:
PCT/JP2021/015352
Publication Date:
October 28, 2021
Filing Date:
April 13, 2021
Export Citation:
Assignee:
NIKON CORP (JP)
International Classes:
G02B21/02; G02B21/06
Foreign References:
| JP2010271693A | 2010-12-02 | |||
| JP2014048342A | 2014-03-17 | |||
| JP2016085335A | 2016-05-19 |
Attorney, Agent or Firm:
OHNISHI, Shogo et al. (JP)
Download PDF: