Patent US1957240A successfully refreshed from Google Patents.
US3877779A
Expired / Lapsed
US
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Dual magnification microscope
Assignee: Individual
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Filing: 1973-06-18
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Granted: 1975-04-15
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Expires: 1993-06-18
Abstract
Abstract A bifocal microscope with dual magnification, of monocular or binocular type, has two closely juxtaposed eyepieces alternately viewable by the same eye, the light passing through a common objective to the eyepieces by way of separate optical paths with different image magnification. The two paths are of different geometrical length; in the case of identical eyepieces, a supplemental lens may be included in one of them to compensate for the difference in path length. The light beam traversing the objective may be divided into two portions, respectively propagating along these paths, by a beam splitter establishing between the two beam portions an intensity ratio substantially equaling the ratio of the squares of the respective magnifications.
Inventors
- 👤 Dermot John Pierse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:26
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/18; G02B21/20
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
199 words
An optical microscope comprising: an objective adapted to be trained upon an object to be viewed; a pair of eyepieces respectively including first lens means and second lens means with intersecting optical axes closely juxtaposed for alternate viewing with the same eye of an observer at the point of intersection of said optical axes; first optical means including said objective and said first lens means for establishing a first ray path for light from said object traversing said objective; second optical means including said objective and said second lens means for establishing a second ray path for light from said object traversing said objective, said first and second optical means having different degrees of magnification but presenting identically oriented images of said object to the observer''s eye; and semireflective means optically in line with said objective for splitting a light beam from said object into a reflected first beam portion and an unreflected second beam portion respectively traveling over said first and second ray paths, said semireflective means being effective to distribute the light of said beam between said beam portions with an intensity ratio substantially equaling the ratio of the squares of the corresponding degrees of magnification. Pg,13
Claim 2
Dependent Claim
199 words
An optical microscope comprising: an objective adapted to be trained upon an object to be viewed; a pair of eyepieces respectively including first lens means and second lens means with intersecting optical axes closely juxtaposed for alternate viewing with the same eye of an observer at the point of intersection of said optical axes; first optical means including said objective and said first lens means for establishing a first ray path for light from said object traversing said objective; second optical means including said objective and said second lens means for establishing a second ray path for light from said object traversing said objective, said first and second optical means having different degrees of magnification but presenting identically oriented images of said object to the observer''s eye; and semireflective means optically in line with said objective for splitting a light beam from said object into a reflected first beam portion and an unreflected second beam portion respectively traveling over said first and second ray paths, said semireflective means being effective to distribute the light of said beam between said beam portions with an intensity ratio substantially equaling the ratio of the squares of the corresponding degrees of magnification. Pg,13
Claim 3
Dependent Claim
18 words
The microscope defined in claim 1 wherein said first and second ray paths are of different geometrical lengths.
Claim 4
Dependent Claim
27 words
The microscope defined in claim 2 wherein one of said optical means is adjustable and provided with means for varying the relative lengths of said ray paths.
Claim 5
Dependent Claim
35 words
The microscope defined in claim 2 wherein one of said optical means includes supplemental lens means for compensating for the difference in the geometrical lengths of said light paths, said eyepieces having identical focal lengths.
Claim 6
Dependent Claim
25 words
The microscope defined in claim 4 wherein said supplemental lens means is disposed in the longer of said ray paths and is of negative power.
Claim 7
Dependent Claim
14 words
The microscope defined in claim 4 wherein said supplemental lens means is axially adjustable.
Claim 8
Dependent Claim
18 words
The microscope defined in claim 2 wherein said second ray path is longer than said first ray path.
Claim 9
Dependent Claim
25 words
The microscope defined in claim 2 wherein said semireflective means comprises a pair of contacting prisms provided with a semi-reflecting film on their contact surface.
Claim 10
Dependent Claim
28 words
The microscope defined in claim 8 wherein said pair of prisms form part of a prism assembly for modifying the orientations of the images presented through said eyepieces.
Claim 11
Dependent Claim
21 words
The microscope defined in claim 1, further comprising fiber-optical illumination means for said object terminating in the vicinity of said objective.
Claim 12
Dependent Claim
17 words
A binocular microscope instrument comprising a pair of monocular optical microscopes each as defined in claim 1.
Claim 13
Dependent Claim
25 words
The instrument defined in claim 11 wherein each of said monocular microscopes is provided with an individual light source disposed next to the objective thereof.
Claim 14
Dependent Claim
21 words
The instrument defined in claim 12 wherein said light source comprises a fiber-optical conduit terminating in the vicinity of said objective.
References Cited (Backward Citations)
US1864895A
Cited
US880028A
Cited
US1012715A
Cited
US2466455A
Cited
US2472600A
Cited
US2578013A
Cited
US2527719A
Cited
US2619874A
Cited
US2705490A
Cited
US3229570A
Cited
US3637283A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |