Patent US3798435A successfully refreshed from Google Patents.
US3798435A
Expired / Lapsed
US
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Versatile light source for a microscope
Assignee: C Reichert Optische Werke AG
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Filing: 1973-08-09
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Granted: 1974-03-19
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Expires: 1993-08-09
Abstract
Abstract An assembly capable of providing light for incident or transmitted microscopy for ultraviolet light and white light microscopy techniques utilizes four lamps and an arrangement of mirrors capable of changing the light exit path from the assembly and selecting the desired type of light source.
Inventors
- 👤 K Schindl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:59
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/06; G02B21/08; G02B21/088
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
421 words
A microscope illuminator comprising a first moderate intensity light source, a first collector lens system to direct light from said source along a first path, a mirror disposed in said path to reflect said light along a second path, a first exit from the illuminator at the distal end of said second light path to a microscope for transmitted light microscopy, a first high intensity light source, a second collector lens system to direct light from said high intensity source along a third path, a manually rotatable reflector to selectively direct light from said third path along one of at least two selected paths, one of said selected paths being a fourth light path intersecting said second light path, ultraviolet filter means selectively positionable in said fourth path, a manually slidable, three position unit located at the intersection of said second and fourth light paths, said unit having a first position to pass light from said mirror to the first exit along said second light path, said unit having a second position to reflect light from the fourth light path along the second light path to said first exit, said unit having a third position to pass at least a portion of the moderate intensity light along the second light path and reflect toward said exit at least a portion of the light from the fourth light path to combine with the moderate intensity light, a second high intensity light source, a third collector lens system to direct light from said second high intensity light source along a sixth path to said manually rotatable reflector, said manually rotatable reflector selectively directing light from said sixth light path along one of said selected paths, a second moderate intensity light source, a collector lens system for directing light therefrom along a seventh light path, a fixed mirror to deflect the light from the seventh light path along an eighth light path, a second exit at the distal end of said eighth light path to a microscope for reflected light microscopy, the other of said selected paths being a fifth light path intersecting said eighth light path between said fixed mirror and said second exit, a manually pivotable mirror positionable at the intersection of said fifth and eighth light paths, said manually pivotable mirror having one position outside said eighth light path and a second position at the intersection of said fifth and said eighth light paths to reflect light from said fifth light path along the eighth light path toward said second exit.
Claim 2
Dependent Claim
421 words
A microscope illuminator comprising a first moderate intensity light source, a first collector lens system to direct light from said source along a first path, a mirror disposed in said path to reflect said light along a second path, a first exit from the illuminator at the distal end of said second light path to a microscope for transmitted light microscopy, a first high intensity light source, a second collector lens system to direct light from said high intensity source along a third path, a manually rotatable reflector to selectively direct light from said third path along one of at least two selected paths, one of said selected paths being a fourth light path intersecting said second light path, ultraviolet filter means selectively positionable in said fourth path, a manually slidable, three position unit located at the intersection of said second and fourth light paths, said unit having a first position to pass light from said mirror to the first exit along said second light path, said unit having a second position to reflect light from the fourth light path along the second light path to said first exit, said unit having a third position to pass at least a portion of the moderate intensity light along the second light path and reflect toward said exit at least a portion of the light from the fourth light path to combine with the moderate intensity light, a second high intensity light source, a third collector lens system to direct light from said second high intensity light source along a sixth path to said manually rotatable reflector, said manually rotatable reflector selectively directing light from said sixth light path along one of said selected paths, a second moderate intensity light source, a collector lens system for directing light therefrom along a seventh light path, a fixed mirror to deflect the light from the seventh light path along an eighth light path, a second exit at the distal end of said eighth light path to a microscope for reflected light microscopy, the other of said selected paths being a fifth light path intersecting said eighth light path between said fixed mirror and said second exit, a manually pivotable mirror positionable at the intersection of said fifth and eighth light paths, said manually pivotable mirror having one position outside said eighth light path and a second position at the intersection of said fifth and said eighth light paths to reflect light from said fifth light path along the eighth light path toward said second exit.
Claim 3
Dependent Claim
39 words
The illuminator of claim 1 wherein said first and second moderate intensity light sources are quartz-iodine lamps, said first high intensity light source is a xenon arc, and said second high intensity light source is a cesium iodide arc.
Claim 4
Dependent Claim
26 words
The illuminator of claim 2 further including at least one filter selectively positionable in the second light path between the sliding unit and the first exit.
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |