US4183666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of measuring light transmission losses of optical materials
Assignee: Mitsubishi Chemical Corp
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Filing: 1977-03-10
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Granted: 1980-01-15
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Expires: 1997-03-10
Abstract
Abstract A method of measuring light transmission losses of optical materials comprising projecting light beams at two separate points alternatively or a light beam through a part of an optical material to be measured, and detecting the intensities of light radiated at two separate points lying along the direction of propagation of said light beams in said part.
Inventors
- 👤 Yasuteru Tahara
- 👤 Shunsuke Minami
- 👤 Masaharu Oda
- 👤 Mikio Sera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:16
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/59; G01M; G01M11/00; G01M11/30; G01M11/33; G01M11/35
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
95 words
A method of measuring light transmission losses of optical material comprising the steps of: providing an optical material whose light transmission loss is to be measured and which has scattering elements that cause a fraction of any light transmitted through the optical material to be radiated out of the optical material; projecting light beams at two separate points alternately through a part of the optical material; and detecting the intensities of light radiated out of the optical mateiral at two separate points lying along the direction of transmission of said light beams in said part.
Claim 2
Independent Claim
95 words
A method of measuring light transmission losses of optical material comprising the steps of: providing an optical material whose light transmission loss is to be measured and which has scattering elements that cause a fraction of any light transmitted through the optical material to be radiated out of the optical material; projecting light beams at two separate points alternately through a part of the optical material; and detecting the intensities of light radiated out of the optical mateiral at two separate points lying along the direction of transmission of said light beams in said part.
Claim 3
Dependent Claim
23 words
A method of measuring light transmission losses of optical materials according to claim 1 wherein said optical material is a continuous optical material.
Claim 4
Dependent Claim
23 words
A method of measuring light transmission losses of optical material according to claim 2 wherein said continuous optical material is an optical fiber.
Claim 5
Dependent Claim
47 words
A method of measuring light transmission losses of optical materials according to claim 2 wherein a light is projected from the two separate surface points of said material and the intensities of the radiated light beam from the two separate surface points of said material are measured.
Claim 6
Dependent Claim
28 words
A method of measuring light transmission losses of optical materials according to claim 4 wherein the intensities of radiated light are continuously detected while running the optical material.
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) | 1983-01-14 | 1983-07-16 | 1984-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-14 | 1987-07-16 | 1988-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-14 | 1991-07-16 | 1992-01-15 | $7700.00 | Window Closed / Lapsed |