US4893886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-destructive optical trap for biological particles and method of doing same
Assignee: Nokia of America Corp
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Filing: 1987-09-17
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Granted: 1990-01-16
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Expires: 2007-09-17
Abstract
Abstract Biological particles are successfully trapped in a single-beam gradient force trap using an infrared laser. The high numerical aperture lens objective in the trap is also used for simultaneous viewing. Several modes of trapping operation are presented.
Inventors
- 👤 Arthur Ashkin
- 👤 Joseph M. Dziedzic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:39
CPC Classifications
H; H05; H05H; H05H3/00; H05H3/04; B; B01; B01D; B01D43/00; G; G01; G01N; G01N15/00; G01N15/10; G02; G02B; G02B21/00; G02B21/32; G01N15/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
79 words
Apparatus for generating a single-beam gradient force optical trap of particles, said apparatus comprising a laser for generating a light beam at a predetermined wavelength and means for focusing said light beam with sufficient convergence to form said optical trap in a predetermined region, said apparatus characterized in that said predetermined wavelength is substantially included in the infrared range of wavelengths between 0.8 μm and 1.8 μm inclusively, so that said trap non-destructively confines at least one biological particle.
Claim 2
Dependent Claim
79 words
Apparatus for generating a single-beam gradient force optical trap of particles, said apparatus comprising a laser for generating a light beam at a predetermined wavelength and means for focusing said light beam with sufficient convergence to form said optical trap in a predetermined region, said apparatus characterized in that said predetermined wavelength is substantially included in the infrared range of wavelengths between 0.8 μm and 1.8 μm inclusively, so that said trap non-destructively confines at least one biological particle.
Claim 3
Dependent Claim
20 words
Apparatus as defined in claim 1 wherein said focusing means includes a lens having a numerical aperture greater than 0.9.
Claim 4
Dependent Claim
17 words
Apparatus as defined in claim 1 further including means for varying a position of said predetermined region.
Claim 5
Dependent Claim
110 words
Apparatus for generating a single-beam gradient force optical trap of particles, said apparatus being comprised of a laser for generating a light beam at a predetermined wavelength and means for focusing said light beam with sufficient convergence to form said optical trap in a predetermined region, said apparatus characterized in that said predetermined wavelength is substantially included in the infrared range of wavelengths, so that said trap non-destructively confines at least one biological particle, said apparatus further including means for generating a second light beam substantially at the predetermined wavelength, said second light beam focused by said focusing means to form a second optical trap in a second predetermined region.
Claim 6
Dependent Claim
110 words
Apparatus for generating a single-beam gradient force optical trap of particles, said apparatus being comprised of a laser for generating a light beam at a predetermined wavelength and means for focusing said light beam with sufficient convergence to form said optical trap in a predetermined region, said apparatus characterized in that said predetermined wavelength is substantially included in the infrared range of wavelengths, so that said trap non-destructively confines at least one biological particle, said apparatus further including means for generating a second light beam substantially at the predetermined wavelength, said second light beam focused by said focusing means to form a second optical trap in a second predetermined region.
Claim 7
Dependent Claim
18 words
Apparatus as defined in claim 4 further including means for independently varying relative positions of the predetermined regions.
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) | 1993-01-15 | 1993-07-17 | 1994-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-15 | 1997-07-17 | 1998-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-15 | 2001-07-17 | 2002-01-16 | $7700.00 | Window Closed / Lapsed |