US4232971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrating sphere type standard light source device
Assignee: Individual
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Filing: 1979-03-22
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Granted: 1980-11-11
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Expires: 1999-03-22
Abstract
Abstract An integrating sphere type standard light source has a spherical shell the inner surface of which is coated with a white coating having a high reflectivity. The shell has a light source aperture in the top thereof, a viewing aperture in the side thereof and a specimen exposure aperture in the bottom thereof. A light source is mounted in the light source aperture and depends into said shell and includes a source of light and a light shielding plate between the source of light and the remainder of the interior of the shell, the light shielding plate also being coated with a white coating having a high reflectivity. A specimen supporting plate is positioned beneath the specimen exposure aperture and is normally positioned for supporting a specimen at the bottommost point of an imaginary spherical surface which is an extension of the internal surface of the shell into the specimen exposure aperture. A specimen supporting plate is mounted for movement into and out of the normal position thereof for placing a specimen to be observed on the specimen supporting plate.
Inventors
- 👤 Shigeru Suga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:20
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/47; G01N21/4738; G01N21/474
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
181 words
An integrating sphere type standard light source, comprising: a spherical shell having the inner surface coated with a white coating having a high reflectivity, said shell having a light source aperture in the top thereof, a viewing aperture in the side thereof and a specimen exposure aperture in the bottom thereof; a light source means mounted in said light source aperture and depending into said shell and including a source of light and a light shielding plate between said source of light and the remainder of the interior of said shell, said light shielding plate being coated with a white coating having a high reflectivity; a specimen supporting plate beneath said specimen exposure aperture and normally positioned for supporting a specimen at the bottommost point of an imaginary spherical surface which is an extension of the internal surface of said shell into said specimen exposure aperture; and means on which said specimen supporting plate is mounted for moving said specimen plate into and out of the normal position thereof for placing a specimen to be observed on said specimen supporting plate.
Claim 2
Dependent Claim
181 words
An integrating sphere type standard light source, comprising: a spherical shell having the inner surface coated with a white coating having a high reflectivity, said shell having a light source aperture in the top thereof, a viewing aperture in the side thereof and a specimen exposure aperture in the bottom thereof; a light source means mounted in said light source aperture and depending into said shell and including a source of light and a light shielding plate between said source of light and the remainder of the interior of said shell, said light shielding plate being coated with a white coating having a high reflectivity; a specimen supporting plate beneath said specimen exposure aperture and normally positioned for supporting a specimen at the bottommost point of an imaginary spherical surface which is an extension of the internal surface of said shell into said specimen exposure aperture; and means on which said specimen supporting plate is mounted for moving said specimen plate into and out of the normal position thereof for placing a specimen to be observed on said specimen supporting plate.
Claim 3
Dependent Claim
20 words
An integrating sphere type standard light source as claimed in claim 1 in which said white coating is barium sulfate.
Claim 4
Dependent Claim
65 words
An integrating sphere type standard light source as claimed in claim 1 in which said light source means further comprises a cover fitting over said light source aperture, said light shielding plate being spaced inwardly of said shell from said cover and a pole connected between said cover and said shielding plate, said source of light being on the upper surface of said shielding plate.
Claim 5
Dependent Claim
23 words
An integrating sphere type standard light source as claimed in claim 3 in which said cover has a handle on the top thereof.
Claim 6
Dependent Claim
57 words
An integrating sphere type standard light source as claimed in claim 1 in which said source of light comprises a plurality of lamps each emitting a different type of light, and light shields on said light shielding plate between respective ones of said lamps, said light shields being coated with a white coating having a high reflectivity.
Claim 7
Dependent Claim
30 words
An integrating sphere type standard light source as claimed in claim 5 in which said lamps are a D 65 lamp, a tungsten incandescent lamp, and a black light lamp.
Claim 8
Dependent Claim
45 words
An integrating sphere type standard light source as claimed in claim 1 in which said viewing aperture is at the end of a diametrical axis of said sphere which is perpendicular to a diametrical axis between said light source aperture and said specimen exposure aperture.
References Cited (Backward Citations)
US2325350A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-11 | 1984-05-12 | 1984-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-11 | 1988-05-12 | 1988-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-11 | 1992-05-12 | 1992-11-11 | $7700.00 | Window Closed / Lapsed |