US4284897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescence determining microscope utilizing laser light
Assignee: Olympus Corp
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Filing: 1978-03-13
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Granted: 1981-08-18
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Expires: 1998-03-13
Abstract
Abstract A fluorescence determining microscope scans the surface of a specimen with laser light. The fluorescence produced is split into components of different wavelengths, and the fluorescence of the respective wavelengths is determined.
Inventors
- 👤 Ichiro Sawamura
- 👤 Mamoru Aihara
- 👤 Kazuhiko Nakamura
- 👤 Youichi Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:46
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/63; G01N21/64; G01N21/645; G01N21/6456; G01N21/6458; G02; G02B; G02B21/00; G02B21/0004; G02B21/002; G02B21/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
88 words
A microscope for scanning and determining the fluorescence of a cell comprised of a nucleus surrounded by cytoplasm, said microscope comprising: a laser light source for emitting light having a spot size smaller than the nucleus of the cell to be scanned; scanning means for directing the light from said light source onto the cell to spotwise irradiate the cell to produce fluorescence; means for splitting the produced fluorescence into components of different wavelengths; and detecting means for detecting the level of the fluorescence of the respective components.
Claim 2
Dependent Claim
88 words
A microscope for scanning and determining the fluorescence of a cell comprised of a nucleus surrounded by cytoplasm, said microscope comprising: a laser light source for emitting light having a spot size smaller than the nucleus of the cell to be scanned; scanning means for directing the light from said light source onto the cell to spotwise irradiate the cell to produce fluorescence; means for splitting the produced fluorescence into components of different wavelengths; and detecting means for detecting the level of the fluorescence of the respective components.
Claim 3
Dependent Claim
34 words
The microscope of claim 1 wherein said scanning means includes a condenser lens interposed between said light source and the cell to be scanned for condensing the light emitted by said laser light source.
Claim 4
Dependent Claim
46 words
The microscope of claim 2 wherein said scanning means includes a pair of galvanometric mirrors interposed between said light source and the cell to be scanned for reflecting light emitted by said laser light source onto the cell to scan the cell in a spotwise manner.
Claim 5
Dependent Claim
76 words
The microscope of claim 1 wherein said splitting means comprises a dichroic mirror adapted to reflect light of a first wavelength and to transmit light of a second wavelength different from said first wavelength; and said detecting means comprises first and second light sensitive elements respectfully positioned to receive said reflected light and said transmitted light from said dichroic mirror for generating electrical signals representative of the levels of light of said first and second wavelengths.
Claim 6
Dependent Claim
39 words
The microscope of claim 4 further comprising means associated with said detecting means for determining the area of said cytoplasm and said nucleus whereby the ratios of two areas may be utilized to determine the presence of cancerous cells.
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) | 1984-08-17 | 1985-02-16 | 1985-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-17 | 1989-02-16 | 1989-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-17 | 1993-02-16 | 1993-08-18 | $7700.00 | Window Closed / Lapsed |