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US3602597A
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Differential circular dichroism measuring apparatus
Assignee: Dionex Corp
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Filing: 1969-09-17
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Granted: 1971-08-31
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Expires: 1989-09-17
Abstract
Abstract A circular dichroism (CD) and/or optical rotatory dispersion (ORD) measuring apparatus having half-wave retardation means and a reference cell inserted in the light beam to convert the apparatus to measure differential CD and/or ORD is disclosed.
Inventors
- 👤 Donald P Sproul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:13
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/19
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
124 words
Apparatus for providing a measurement of the difference between the circular dichroism of a sample and a reference material including means forming a beam of polarized light, means for alternately right-and-left circularly polarizing the beam, a sample cell for presenting sample material to said right-and-left circularly polarized beam whereby the beam traverses the sample material, means for receiving the emergent beam and retarding the components of the beam one-half wave length, a reference cell for presenting the reference material to said retarded beam so that the beam traverses the reference material whereby the circular dichroism effect of said reference is simultaneously subtracted from that of said sample, and transducer means for receiving the emergent beam from the reference material and forming an electrical signal.
Claim 2
Dependent Claim
124 words
Apparatus for providing a measurement of the difference between the circular dichroism of a sample and a reference material including means forming a beam of polarized light, means for alternately right-and-left circularly polarizing the beam, a sample cell for presenting sample material to said right-and-left circularly polarized beam whereby the beam traverses the sample material, means for receiving the emergent beam and retarding the components of the beam one-half wave length, a reference cell for presenting the reference material to said retarded beam so that the beam traverses the reference material whereby the circular dichroism effect of said reference is simultaneously subtracted from that of said sample, and transducer means for receiving the emergent beam from the reference material and forming an electrical signal.
Claim 3
Dependent Claim
114 words
Apparatus for providing a measurement of the difference between the optical rotary dispersion of a sample and a reference material including means forming a beam of polarized light, a sample cell for presenting the sample material to said beam whereby the beam traverses the sample material, means for receiving the emergent beam and retarding the beam one-half wavelength, a reference cell for presenting the reference material to said retarded beam so that the beam traverses the reference material whereby the optical rotary dispersion effect of said reference is simultaneously subtracted from that of said sample, and an analyzer prism for analyzing said light and providing an indication of the difference of optical rotary dispersion.
Claim 4
Dependent Claim
114 words
Apparatus for providing a measurement of the difference between the optical rotary dispersion of a sample and a reference material including means forming a beam of polarized light, a sample cell for presenting the sample material to said beam whereby the beam traverses the sample material, means for receiving the emergent beam and retarding the beam one-half wavelength, a reference cell for presenting the reference material to said retarded beam so that the beam traverses the reference material whereby the optical rotary dispersion effect of said reference is simultaneously subtracted from that of said sample, and an analyzer prism for analyzing said light and providing an indication of the difference of optical rotary dispersion.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |