US3707030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making fiber light-pipe diffuser for colorimeters
Assignee: HUNTER ASSOCIATES LAB Inc
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Filing: 1970-10-20
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Granted: 1972-12-26
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Expires: 1990-10-20
Abstract
Abstract In a commercial colorimeter, a device is provided for conducting light from a specimen to several photocells in such a way that each photocell receives geometrically the same illumination from the specimen. By using different filters and spectral responses, differences in photocell signal are used in the colorimeter to provide chromatic information of high precision. It is important that this information not be biased by differences in geometric distribution of light to the different photocell positions. The light-conducting device comprises a bundle of internal light reflecting filaments (light fibers), the filaments of which are individually pre-set in place in the bundle in such a manner as to insure that light from each area of the specimen is distributed in the same proportion to each photocell.
Inventors
- 👤 Richard S Hunter
- 👤 John S Christie
- 👤 Roland D Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:58
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/02; G01J3/0205; G01J3/0218; G01J3/46; G01J3/50; G01J3/51; G01J3/513; Y; Y10; Y10S; Y10S359/00; Y10S359/90; Y10T; Y10T29/00; Y10T29/49; Y10T29/49801
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
160 words
Method of making a diffuser for conducting light from a given area to a plurality of reception areas in a predetermined ratio comprising a. providing hooks corresponding to each of said areas, b. winding a thin flexible light-conducting filament between the hook for said given area and the respective hooks for said reception areas so that the number of filament turns at each reception area is in the predetermined ratio, the number of filament turns at the given area being equal to the total number of filameNt turns to all of said reception areas, c. tying the filament turns at each area into a tight bunch, d. cutting the ends of each bunch substantially at right angles to the filaments, the cut area of each bunch corresponding to a desired reception or given area, the total assembly comprising a bundle of light pipes branching from a large bunch at the given area to smaller branch bunches at the reception areas.
Claim 2
Dependent Claim
160 words
Method of making a diffuser for conducting light from a given area to a plurality of reception areas in a predetermined ratio comprising a. providing hooks corresponding to each of said areas, b. winding a thin flexible light-conducting filament between the hook for said given area and the respective hooks for said reception areas so that the number of filament turns at each reception area is in the predetermined ratio, the number of filament turns at the given area being equal to the total number of filameNt turns to all of said reception areas, c. tying the filament turns at each area into a tight bunch, d. cutting the ends of each bunch substantially at right angles to the filaments, the cut area of each bunch corresponding to a desired reception or given area, the total assembly comprising a bundle of light pipes branching from a large bunch at the given area to smaller branch bunches at the reception areas.
Claim 3
Dependent Claim
59 words
The invention according to claim 1, e. and repeating the entire procedure to produce a plurality of such bundles of light-pipes, f. then tying all of the large bunches of the bundles together and respectively tying all of the smaller branch bundles together to form a large diffuser having a large given area and a plurality of reception areas.
References Cited (Backward Citations)
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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) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |