Patent US5123738A successfully refreshed from Google Patents.
US5123738A
Expired / Lapsed
US
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Standard substance for optical calibration and method of making same
Assignee: Sysmex Corp
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Filing: 1989-07-26
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Granted: 1992-06-23
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Expires: 2009-07-26
Abstract
Abstract A standard substance for optical calibration is produced by mixing a proportion of a scattering substance with a first silicone liquid. The optical properties of the first liquid are measured and a further amount of the first liquid is added to the original mixture to provide a desired optical property. Then, the mixture is further mixed with a second silicone liquid which initiates a curing process. The final mixture is poured into a transparent vessel for curing. The transparent vessel, with the cured final mixture inside, is useful as a standard substance for calibration of an optical equipment. A technique for calculating the proportions of the mixtures is disclosed.
Inventors
- 👤 Masaru Yonemura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:03
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/47; G01N21/4785; B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; B01L3/5082
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
52 words
An standard substance for optical calibration comprising: a transparent container; a cured transparent silicone in said transparent container; an amount of fine particles scattered generally uniformly through said cured transparent silicon; a surface of each of said fine particles being coated; and said amount being effective to produce a desired optical property.
Claim 2
Dependent Claim
52 words
An standard substance for optical calibration comprising: a transparent container; a cured transparent silicone in said transparent container; an amount of fine particles scattered generally uniformly through said cured transparent silicon; a surface of each of said fine particles being coated; and said amount being effective to produce a desired optical property.
Claim 3
Dependent Claim
19 words
A standard substance according to claim 1, wherein said transparent container is a tubular container having a closed bottom.
Claim 4
Dependent Claim
18 words
A standard substance according to claim 2, further comprising a plug closing a top of said tubular container.
Claim 5
Independent Claim
190 words
A method for producing a standard substance for optical calibration, comprising: (a) adding to a first silicone liquid an amount of fine particles, a surface of each which is coated, then agitating and scattering said fine particles in the liquid; (b) centrifuging the liquid prepared by step (a); (c) collecting from the liquid prepared by step (b) a liquid portion in which the fine particles are scattered uniformly, and deaerating the collected liquid portion under a low pressure; (d) measuring at least one optical property of said container and said liquid portion; (e) adding a predetermined amount of the first silicone liquid to the liquid portion prepared in step (c) so that the liquid portion prepared by step (d) can be provided with a desired value of the optical property; (f) adding a second silicone liquid to a liquid prepared by step (e) and agitating the two liquids to produce a mixture thereof; (g) deaerating the liquids mixture prepared by step (f) under a low pressure; and (h) pouring the mixture prepared by step (g) in the transparent container and the curing said mixture thereby to provide said standard substance.
Claim 6
Independent Claim
190 words
A method for producing a standard substance for optical calibration, comprising: (a) adding to a first silicone liquid an amount of fine particles, a surface of each which is coated, then agitating and scattering said fine particles in the liquid; (b) centrifuging the liquid prepared by step (a); (c) collecting from the liquid prepared by step (b) a liquid portion in which the fine particles are scattered uniformly, and deaerating the collected liquid portion under a low pressure; (d) measuring at least one optical property of said container and said liquid portion; (e) adding a predetermined amount of the first silicone liquid to the liquid portion prepared in step (c) so that the liquid portion prepared by step (d) can be provided with a desired value of the optical property; (f) adding a second silicone liquid to a liquid prepared by step (e) and agitating the two liquids to produce a mixture thereof; (g) deaerating the liquids mixture prepared by step (f) under a low pressure; and (h) pouring the mixture prepared by step (g) in the transparent container and the curing said mixture thereby to provide said standard substance.
Claim 7
Dependent Claim
47 words
A method according to claim 4, wherein the liquid of step (a) is centrifuged to separate larger ones of said fine particles, and the collecting of step (c) is effected by decanting a portion of said first liquid to include substantially smaller ones of said fine particles.
Claim 8
Dependent Claim
23 words
A method according to claim 4, wherein the deaerating of steps (c) and (g) are effected at a pressure of about 50 Torr.
Claim 9
Dependent Claim
16 words
A method according to claim 4, wherein said at least one optical property is a scattering.
Claim 10
Dependent Claim
27 words
A method according to claim 4 wherein the amount of the first silicone liquid added to said liquid portion is equal to that of said liquid portion.
Claim 11
Dependent Claim
13 words
A method according to claim 4, wherein said fine particles include titanium dioxide.
Claim 12
Dependent Claim
21 words
A method according to claim 9, wherein the particle coating is a material selected from one of alumina, silica and zinc.
References Cited (Backward Citations)
US4322164A
Cited
JPS5741688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-06-23 | 1995-12-23 | 1996-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-23 | 1999-12-23 | 2000-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-23 | 2003-12-23 | 2004-06-23 | $7700.00 | Window Closed / Lapsed |