US4501476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for checking the light source adjustment in an incident light microscope
Assignee: Ernst Leitz Wetzlar GmbH
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Filing: 1982-06-30
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Granted: 1985-02-26
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Expires: 2002-06-30
Abstract
Abstract A device for checking the adjustment of the light source in an incident light microscope includes a centering cylinder having a configuration similar to an objective which is set into the revolving lens turret and can thus be moved into the path of the illuminating beam. The centering cylinder has a bottom plate with markings, for example, in the form of concentric rings and cross-hairs, located approximately in the rear focal plane of the lenses. The light source is thereby imaged on the markings. Observation is effected through an orifice in the jacket of the centering cylinder, which may be rotated around the optical axis. Focusing and adjustment may then be affected by adjusting the collecting lens and/or the lamp housing.
Inventors
- 👤 Guenter Reinheimer
- 👤 Winfried Kraft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:02
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
123 words
A device for checking the adjustment of a light source in an incident light microscope having a revolving lens turret comprising: a centering cylinder having the approximate shape of a lens cylinder; a bottom plate located on the end of said cylinder facing an object to be observed with the microscope, said bottom plate occupying a position in the beam path corresponding approximately to the rear focal plane of a selected lens in the lens turret, and having at least one set of markings; orifice means, provided on said centering cylinder, for permitting observation of said markings; and means attached to said centering cylinder for mounting said centering cylinder in said revolving lens turret rotatably about an optical axis of said centering cylinder.
Claim 2
Independent Claim
123 words
A device for checking the adjustment of a light source in an incident light microscope having a revolving lens turret comprising: a centering cylinder having the approximate shape of a lens cylinder; a bottom plate located on the end of said cylinder facing an object to be observed with the microscope, said bottom plate occupying a position in the beam path corresponding approximately to the rear focal plane of a selected lens in the lens turret, and having at least one set of markings; orifice means, provided on said centering cylinder, for permitting observation of said markings; and means attached to said centering cylinder for mounting said centering cylinder in said revolving lens turret rotatably about an optical axis of said centering cylinder.
Claim 3
Dependent Claim
37 words
a device according to claim 1, wherein said mounting means for the centering cylinder comprises a carrier which is rotatable with respect to said centering cylinder and is adapted to be inserted into the revolving lens turret.
Claim 4
Dependent Claim
25 words
A device according to claim 2, further comprising means for arresting the rotation of the centering cylinder about its optical axis in a selected position.
Claim 5
Dependent Claim
24 words
A device according to claim 3, wherein said arresting means comprises a set screw in said centering cylinder adapted to engage with said carrier.
Claim 6
Dependent Claim
50 words
A device according to claim 1, wherein said mounting means for the centering cylinder comprises a plurality of resilient, outwardly biased clamping straps at its end facing the revolving lens turret, each of said straps being equipped with a threaded section for fastening the cylinder to the revolving lens turret.
Claim 7
Dependent Claim
19 words
A device according to claim 1, wherein said bottom plate carrying said markings is comprised of a transparent material.
Claim 8
Dependent Claim
25 words
A device according to claim 1, wherein said orifice opens in said centering cylinder so that the markings on the bottom plate are directly visible.
Claim 9
Dependent Claim
24 words
A device according to claim 1, wherein said markings comprise a cross-hair with at least one ring concentric with the center of the cross-hair.
Claim 10
Dependent Claim
21 words
A device as claimed in claim 1, wherein said orifice means are positioned at the other end of said centering cylinder.
Claim 11
Dependent Claim
114 words
An incident light microscope, comprising: a light source; a revolving lens turret; a centering cylinder having the approximate shape of a lens cylinder; a bottom plate located on the end of said cylinder facing an object to be observed with the microscope, said bottom plate occupying a position in the beam path corresponding approximately to the rear focal plane of a selected lens in the lens turret, and having at least one set of markings: orifice means, provided on said centering cylinder, for permitting observation of said markings; and means attached to said centering cylinder for mounting said centering cylinder in said revolving lens turret rotatably about an optical axis of said centering cylinder.
Claim 12
Dependent Claim
114 words
An incident light microscope, comprising: a light source; a revolving lens turret; a centering cylinder having the approximate shape of a lens cylinder; a bottom plate located on the end of said cylinder facing an object to be observed with the microscope, said bottom plate occupying a position in the beam path corresponding approximately to the rear focal plane of a selected lens in the lens turret, and having at least one set of markings: orifice means, provided on said centering cylinder, for permitting observation of said markings; and means attached to said centering cylinder for mounting said centering cylinder in said revolving lens turret rotatably about an optical axis of said centering cylinder.
References Cited (Backward Citations)
US3833282A
Cited
US4168429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-26 | 1988-08-27 | 1989-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-26 | 1992-08-27 | 1993-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-26 | 1996-08-27 | 1997-02-26 | $7700.00 | Window Closed / Lapsed |