US4386830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Incident light, bright-field Kohler illuminating device
Assignee: Ernst Leitz Wetzlar GmbH
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Filing: 1981-08-31
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Granted: 1983-06-07
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Expires: 2001-08-31
Abstract
Abstract An incident light, bright-field, Kohler illuminating device for a microscope which reflects an illuminating beam into one half of the pupil of a microscope objective, which avoids vignetting of the field of vision without requiring especially short objectives, which can provide illumination with polarized light, and which can be added to any transmitted light microscope including microscopes with revolvable turrets without requiring a specially designed microscope stand.
Inventors
- 👤 Hans-Werner Stankewitz
- 👤 Hans Determann
- 👤 Guenter Reinheimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:33
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/06; G02B21/08; G02B21/12
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
172 words
An incident light, bright-field, Kohler illuminating device for a microscope which reflects an illuminating beam into one half of the pupil of a microscope objective; said illuminating device comprising: (a) luminous field diaphragm; (b) a first optical element for producing an intermediate image of said luminous field diaphragm; (c) a deflecting mirror disposed adjacent said intermediate image of the luminous field diaphragm, said deflecting mirror covering less than half of the cross section of the observation beam of said microscope and having an inclination such that the optical axis of an illuminating beam deflected by said mirror converges with the optical axis of the microscope objective; (d) an aperture diaphragm; (e) means disposed adjacent said intermediate image of the luminous field diaphragm for imaging said aperture diaphragm; and (f) a second optical element disposed adjacent the pupil of the microscope objective for deflecting the optical axis of an illuminating beam such that the rearward extension of the illuminating beam passes through the center of an intermediate image produced by the microscope objective.
Claim 2
Dependent Claim
172 words
An incident light, bright-field, Kohler illuminating device for a microscope which reflects an illuminating beam into one half of the pupil of a microscope objective; said illuminating device comprising: (a) luminous field diaphragm; (b) a first optical element for producing an intermediate image of said luminous field diaphragm; (c) a deflecting mirror disposed adjacent said intermediate image of the luminous field diaphragm, said deflecting mirror covering less than half of the cross section of the observation beam of said microscope and having an inclination such that the optical axis of an illuminating beam deflected by said mirror converges with the optical axis of the microscope objective; (d) an aperture diaphragm; (e) means disposed adjacent said intermediate image of the luminous field diaphragm for imaging said aperture diaphragm; and (f) a second optical element disposed adjacent the pupil of the microscope objective for deflecting the optical axis of an illuminating beam such that the rearward extension of the illuminating beam passes through the center of an intermediate image produced by the microscope objective.
Claim 3
Dependent Claim
21 words
An illuminating device according to claim 1 wherein said second optical element is disposed at the pupil of the microscope objective.
Claim 4
Dependent Claim
22 words
An illuminating device according to claim 1 further comprising a field lens disposed adjacent the intermediate image of the luminous field diaphragm.
Claim 5
Dependent Claim
15 words
An illuminating device according to claim 1 wherein said deflecting mirror is a concave mirror.
Claim 6
Dependent Claim
17 words
An illuminating device according to claim 1 further comprising a polarizing means directly following said deflecting mirror.
Claim 7
Dependent Claim
32 words
An illuminating device according to claim 1 wherein said second optical element comprises a lens positioned eccentrically with respect to the optical axis of an illuminating beam deflected by said deflecting mirror.
Claim 8
Dependent Claim
24 words
An illuminating means according to claim 6 wherein the optical axis of said lens is parallel to the optical axis of the microscope objective.
Claim 9
Dependent Claim
24 words
An illuminating device according to claim 6 wherein the optical axis of said lens is parallel to the axis of said deflected illuminating beam.
Claim 10
Dependent Claim
35 words
An illuminating device according to claim 6 wherein the optical axis of said lens lies intermediate the optical axis of the microscope objective and the axis of an illuminating beam deflected by said deflecting mirror.
Claim 11
Dependent Claim
29 words
An illuminating device according to claim 6 wherein said lens has a flat surface on the light entry side perpendicular to the optical axis of an entering illuminating beam.
Claim 12
Dependent Claim
16 words
An illuminating device according to claim 6 wherein said lens is formed as a cemented element.
Claim 13
Dependent Claim
35 words
An illuminating device according to claim 1 wherein said second optical element comprises a lens centered with respect to the optical axis of an illuminating beam deflected by said mirror and a beam deflecting prism.
Claim 14
Dependent Claim
27 words
An illuminating device according to claim 1 wherein said second optical element is chromatically corrected to compensate for the dispersion resulting from deflection of the illuminating beam.
Claim 15
Dependent Claim
21 words
An illuminating device according to claim 1 wherein the optical elements which follow the deflecting mirror are disposed in a sleeve.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |