US3906239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light measuring apparatus for apertured material
Assignee: GTE Sylvania Inc
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Filing: 1974-05-08
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Granted: 1975-09-16
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Expires: 1994-05-08
Abstract
Abstract An apparatus for determining the amount of light passing through relatively thin strip of apertured metallic material such as formed in standard aperture masks utilized in color television cathode ray tubes.
Inventors
- 👤 Charles W Smith
- 👤 Mahlon D Dyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:49
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/95; G01N21/956
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
160 words
An apparatus for determining the amount of light passing through an apertured material having several relatively small apertures therein, said apparatus comprising: a light source; diffusion means positioned relative to said light source for diffusing the light received from said light source; collimation means positioned relative to said diffusion means for collimating the diffused light from said diffusion means to provide a substantially parallel beam of diffused light; focusing means positioned relative to said collimation means and on one side of said apertured material for receiving said substantially parallel beam of diffused light from said collimation means and providing a focused beam of light through said apertured material; receiving means positioned on an opposing side of said aperture material from said focusing means for receiving said focused beam of light passing through said apertured material from said focusing means; and measuring means operatively connected to said receiving means for measuring the amount of focused light received by said receiving means.
Claim 2
Independent Claim
160 words
An apparatus for determining the amount of light passing through an apertured material having several relatively small apertures therein, said apparatus comprising: a light source; diffusion means positioned relative to said light source for diffusing the light received from said light source; collimation means positioned relative to said diffusion means for collimating the diffused light from said diffusion means to provide a substantially parallel beam of diffused light; focusing means positioned relative to said collimation means and on one side of said apertured material for receiving said substantially parallel beam of diffused light from said collimation means and providing a focused beam of light through said apertured material; receiving means positioned on an opposing side of said aperture material from said focusing means for receiving said focused beam of light passing through said apertured material from said focusing means; and measuring means operatively connected to said receiving means for measuring the amount of focused light received by said receiving means.
Claim 3
Dependent Claim
21 words
The apparatus according to claim 1 wherein said light source is a heavy filament lamp having a substantially translucent glass envelope.
Claim 4
Dependent Claim
36 words
The apparatus according to claim 1 wherein said diffusion means comprises a random mix fiber optics bundle having a first end positioned substantially adjacent said light source and a second end positioned within said collimation means.
Claim 5
Dependent Claim
19 words
The apparatus according to claim 1, wherein said collimation means comprises a collimator tube having a darkened inner surface.
Claim 6
Dependent Claim
31 words
The apparatus according to claim 1 wherein said focusing means comprises a convex lens having a convex surface for receiving said substantially parallel beam of diffused light from said collimation means.
Claim 7
Dependent Claim
22 words
The apparatus according to claim 1 wherein said receiving means comprises an electrical circuit including a temperature compensated resistor and a phototube.
Claim 8
Dependent Claim
34 words
The apparatus according to claim 6 wherein said measuring means comprises a digital voltmeter electrically connected to said electrical circuit of said receiving means for measuring the voltage generated across said temperature compensated resistor.
Claim 9
Dependent Claim
19 words
The apparatus according to claim 2 further including an electrical power supply for supplying electrical current to said lamp.
Claim 10
Dependent Claim
28 words
The apparatus according to claim 7 further including an electrical power supply for supplying electrical current to said electrical circuit of said receiving means and said digital voltmeter.
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) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |