US8300308B2
Active / In Force
US
⏱️ 3.5 years remaining
Eyepiece base unit and microscope
Assignee: Nikon Corp
•
Filing: 2010-04-15
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Granted: 2012-10-30
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Expires: 2030-04-15
Abstract
Abstract An eyepiece base unit and a microscope with which a phase contrast observation function can be easily added to the microscope. The eyepiece base unit is removably attached to a main unit of the microscope, and includes, in a state of being attached to the microscope, a pupil conjugate plane, which is a plane conjugate with an image side focal plane of an objective lens in an observation optical system of the microscope. By rotating a turret around a central axis, phase plates installed in the turret can be inserted into the pupil conjugate plane.
Inventors
- 👤 Masaaki Tamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:40
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/24; G02B21/0004; G02B21/0088; G02B21/06; G02B21/08; G02B21/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
An inverted microscope that can perform phase contrast observation, comprising: an objective lens; an eyepiece tube; a main unit that includes a portion of an observation optical system between the objective lens and the eyepiece tube; and; a first eyepiece base unit that houses a phase plate for phase contrast observation and that can be removably attached to the main unit so as to be replaceable with a second eyepiece base unit housing another optical device for performing observation other than phase contrast observation, the first eyepiece base unit in a state of being attached to the main unit being configured to be able to install at a position conjugate with a pupil of the objective lens, wherein the eyepiece tube can be removably attached to the first eyepiece base unit and the second eyepiece base unit; the first eyepiece base unit further comprises an eyepiece base unit body; the phase plate is housed in the eyepiece base unit body; and a side port cylinder for installing a camera for imaging the observation sample is attached to the eyepiece base unit body.
Claim 2
Dependent Claim
182 words
An inverted microscope that can perform phase contrast observation, comprising: an objective lens; an eyepiece tube; a main unit that includes a portion of an observation optical system between the objective lens and the eyepiece tube; and; a first eyepiece base unit that houses a phase plate for phase contrast observation and that can be removably attached to the main unit so as to be replaceable with a second eyepiece base unit housing another optical device for performing observation other than phase contrast observation, the first eyepiece base unit in a state of being attached to the main unit being configured to be able to install at a position conjugate with a pupil of the objective lens, wherein the eyepiece tube can be removably attached to the first eyepiece base unit and the second eyepiece base unit; the first eyepiece base unit further comprises an eyepiece base unit body; the phase plate is housed in the eyepiece base unit body; and a side port cylinder for installing a camera for imaging the observation sample is attached to the eyepiece base unit body.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2015-10-30 | 2016-04-30 | 2016-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2019-10-30 | 2020-04-30 | 2020-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2023-10-30 | 2024-04-30 | 2024-10-30 | $7700.00 | Window Closed / Lapsed |