US4527062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable infrared spectrophotometer
Assignee: United States Department of the Navy
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Filing: 1983-07-05
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Granted: 1985-07-02
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Expires: 2003-07-05
Abstract
Abstract A portable infrared spectrophotometer for nondestructive testing of coatings, plastics, rubber and other organic construction materials. A single source of infrared light is formed into two beams. One beam is directed to the surface of a sample where it is reflected off the surface of the sample at least four times. The other beam follows a similar path but bounces off a neutral surface. The two beams are combined and focused onto a detector. The output of the detector is proportional to the energy absorbed by the surface of the test sample. A pen recorder is used to provide a graphic display of the spectrum generated.
Inventors
- 👤 Thomas Novinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:05
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/35; G01N21/3563; G01N21/55; G01N21/552; G01N21/84; G01N21/8422
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A portable infrared spectrophotometer for the nondestructive testing and identification of solid organic samples such as plastics, rubber and other organic construction materials, the combination comprising: a. a source of polychromatic infrared energy in the range of 2-15 microns; b. means for forming energy from said infrared source into two infrared beams of equivalent optical lengths; c. means for deflecting one of said infrared beams onto the surface of a sample to be identified; d. means for reflecting said beam off said sample surface a predetermined number of times; e. means for deflecting said beam back into its original path; f. a continuous filter for converting the polychromatic infrared light into monochromatic infrared energy to produce a spectrum of wavelength vs. transmittance; g. means for recovering said converted beam and converging said reflected beam along with said other beam to impinge on a single detector to generate a signal proportional to the infrared energy absorbed by said sample; h. said signal being used to drive a pen on a chart recorder.
Claim 2
Dependent Claim
171 words
A portable infrared spectrophotometer for the nondestructive testing and identification of solid organic samples such as plastics, rubber and other organic construction materials, the combination comprising: a. a source of polychromatic infrared energy in the range of 2-15 microns; b. means for forming energy from said infrared source into two infrared beams of equivalent optical lengths; c. means for deflecting one of said infrared beams onto the surface of a sample to be identified; d. means for reflecting said beam off said sample surface a predetermined number of times; e. means for deflecting said beam back into its original path; f. a continuous filter for converting the polychromatic infrared light into monochromatic infrared energy to produce a spectrum of wavelength vs. transmittance; g. means for recovering said converted beam and converging said reflected beam along with said other beam to impinge on a single detector to generate a signal proportional to the infrared energy absorbed by said sample; h. said signal being used to drive a pen on a chart recorder.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-01 | 1988-12-31 | 1989-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-01 | 1992-12-31 | 1993-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-01 | 1996-12-31 | 1997-07-02 | $7700.00 | Window Closed / Lapsed |