US4097152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spectrophotometer with visual spectrum display
Assignee: Kollmorgen Corp
•
Filing: 1976-08-25
•
Granted: 1978-06-27
•
Expires: 1996-08-25
Abstract
Abstract An electro-optical device which measures the transmittance of a sample at any desired visible wavelength and simultaneously displays the visual transmittance spectrum of the sample.
Inventors
- 👤 Stanley J. Kishner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:10
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A spectrophotometer for providing, simultaneously, a measurement of sample transmittance at any desired visible wavelength and a display of the visible transmittance spectrum of the sample comprising: (a) an incandescent lamp having a linear filament; (b) a lens for focusing the light produced by said filament; (c) a transmissive diffraction grating responsive to said light focused by said lens for dispersing said light into its component wavelengths and illuminating said sample with said dispersed light; (d) a diffusing viewing screen for displaying the dispersed light transmitted by said sample; (e) a photoconductive photodetector located proximate to and below said display and slightly closer to said diffraction grating than said screen for simultaneously, selectively sensing a portion of the spectrum of said dispersed light transmitted by said sample and displayed on the upper portion of said screen; (f) means for indicating which portion of the spectrum of said dispersed light transmitted by said sample is being sensed by said photodetector; and (g) means for providing a visual indication of the sample transmittance.
Claim 2
Dependent Claim
171 words
A spectrophotometer for providing, simultaneously, a measurement of sample transmittance at any desired visible wavelength and a display of the visible transmittance spectrum of the sample comprising: (a) an incandescent lamp having a linear filament; (b) a lens for focusing the light produced by said filament; (c) a transmissive diffraction grating responsive to said light focused by said lens for dispersing said light into its component wavelengths and illuminating said sample with said dispersed light; (d) a diffusing viewing screen for displaying the dispersed light transmitted by said sample; (e) a photoconductive photodetector located proximate to and below said display and slightly closer to said diffraction grating than said screen for simultaneously, selectively sensing a portion of the spectrum of said dispersed light transmitted by said sample and displayed on the upper portion of said screen; (f) means for indicating which portion of the spectrum of said dispersed light transmitted by said sample is being sensed by said photodetector; and (g) means for providing a visual indication of the sample transmittance.
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) | 1981-06-26 | 1981-12-26 | 1982-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-26 | 1985-12-26 | 1986-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-26 | 1989-12-26 | 1990-06-27 | $7700.00 | Window Closed / Lapsed |