US4586820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for measuring anisotropy of light emitted from the sample
Assignee: Horiba Ltd
•
Filing: 1984-03-27
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Granted: 1986-05-06
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Expires: 2004-03-27
Abstract
Abstract An apparatus for measuring anisotropy of light emitted from the sample, in which photodetectors are each disposed by either side of the sample and TACs are connected to the abovesaid apparatus each correspondingly to one photodetector so that a vertical polarized component and a horizontal one of light emitted from the sample can be measured at the same time for enabling analysis operation in a short period of time and measurement in high precision.
Inventors
- 👤 Issei Yokoyama
- 👤 Kiyoaki Hara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:33
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/63; G01N21/64; G01N21/6445; G01J; G01J3/00; G01J3/28; G01J3/443
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
278 words
An apparatus for measuring an anisotropy of light emitted from a sample by detecting a vertical polarized component and a horizontal polarized component of light emitted from said sample when said sample is excited by polarized light so as to obtain an anisotropy curves from histograms showing the intensity of said polarized light components with respect to time, said apparatus comprising: two photodetectors for detecting light emitted from said sample; an analyzer for allowing a polarized light component parallel with the polarization direction of said exciting polarized light projected on said sample to pass therethrough, said analyzer positioned between one of said photodetectors and said sample; another analyzer for allowing a polarized light component perpendicular to the polarization direction of said exciting polarized light projected on said sample to pass therethrough, said another analyzer positioned between the other of said two photodetectors and said sample; two sets of time to amplitude converters which simultaneously start to operate at a standard time when exciting polarized light is projected on said sample, each set of time to amplitude converters being individually connected to corresponding photodetectors; wherein one set of time to amplitude converters is arranged to stop operating separately from the other set of time to amplitude converters by using a photopulse generated in each photodetector as a stop pulse and wherein simultaneous detection of said vertical and horizontal polarized light components can be performed; said apparatus further comprising a changeover switch positioned between said two sets of time to amplitude converters and said two photodetectors such that photopulses detected by one of said two photodetectors can be counted by both of said two sets of time to amplitude converters.
Claim 2
Independent Claim
278 words
An apparatus for measuring an anisotropy of light emitted from a sample by detecting a vertical polarized component and a horizontal polarized component of light emitted from said sample when said sample is excited by polarized light so as to obtain an anisotropy curves from histograms showing the intensity of said polarized light components with respect to time, said apparatus comprising: two photodetectors for detecting light emitted from said sample; an analyzer for allowing a polarized light component parallel with the polarization direction of said exciting polarized light projected on said sample to pass therethrough, said analyzer positioned between one of said photodetectors and said sample; another analyzer for allowing a polarized light component perpendicular to the polarization direction of said exciting polarized light projected on said sample to pass therethrough, said another analyzer positioned between the other of said two photodetectors and said sample; two sets of time to amplitude converters which simultaneously start to operate at a standard time when exciting polarized light is projected on said sample, each set of time to amplitude converters being individually connected to corresponding photodetectors; wherein one set of time to amplitude converters is arranged to stop operating separately from the other set of time to amplitude converters by using a photopulse generated in each photodetector as a stop pulse and wherein simultaneous detection of said vertical and horizontal polarized light components can be performed; said apparatus further comprising a changeover switch positioned between said two sets of time to amplitude converters and said two photodetectors such that photopulses detected by one of said two photodetectors can be counted by both of said two sets of time to amplitude converters.
Claim 3
Dependent Claim
23 words
An apparatus as recited in claim 1, wherein each of said two sets of time to amplitude converters comprise a plurality of channels.
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) | 1989-05-05 | 1989-11-04 | 1990-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-05 | 1993-11-04 | 1994-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-05 | 1997-11-04 | 1998-05-06 | $7700.00 | Window Closed / Lapsed |