EP0120715A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Optical measuring cells
Assignee: Individual
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Filing: 1984-03-29
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Granted: —
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Expires: 2004-03-29
Abstract
Abstract An optical measuring cell comprises an elongate base member 1 having a channel formed in one face thereof and a transparent cover 4 fixed to the base member over the channel over at least part of the length of the base member, the channel being dimensioned such that in use fluid to be tested may be drawn by capillary action into the channel. The base member is reflective so that light passing through the cover and fluid is reflected to pass again through the fluid and cover. The cell may be used for the determination of the concentration of haemoglobin in undiluted blood samples.
Inventors
- 👤 Christopher Paul Hyslop
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 04:34
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/01; G01N21/03; G01N2021/0325; G01N2021/0346
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
86 words
An optical measuring cell comprising an elongate base member having a channel formed in one face thereof and a transparent cover fixed to the base member over the channel over at least part of the length of the base member, the channel being di-mensioned such that in use fluid to be tested may be drawn by capillary action into the channel and the base member being reflective so that light passing through the cover and fluid is reflected to pass again through the fluid and cover.
Claim 2
Dependent Claim
86 words
An optical measuring cell comprising an elongate base member having a channel formed in one face thereof and a transparent cover fixed to the base member over the channel over at least part of the length of the base member, the channel being di-mensioned such that in use fluid to be tested may be drawn by capillary action into the channel and the base member being reflective so that light passing through the cover and fluid is reflected to pass again through the fluid and cover.
Claim 3
Dependent Claim
42 words
An optical measuring cell as claimed in claim 1 wherein the cover extends to at least one end of the base member whereby fluid to be tested may be drawn by capillary action from said at least one end into the channel.
Claim 4
Dependent Claim
26 words
An optical measuring cell as claimed in claim 1 or 2wherein the transparent cover extends over only a part of the length of the base member.
Claim 5
Dependent Claim
21 words
An optical measuring cell as claimed in claim 1, 2 or 3 containing a measured amount of one or more reagents.
Claim 6
Dependent Claim
16 words
An optical measuring cell as claimed in claim 4 wherein the reagent(s) are in solid form.
Claim 7
Dependent Claim
18 words
An optical measuring cell as claimed in any preceding claim wherein the base member is a diffuse reflector.
Claim 8
Dependent Claim
39 words
An optical measuring cell as claimed in any preceding claim in the form of a tube of substantially uniform rectangular cross-section of which one side is transparent and of which the opposing side is provided with a reflective surface.
Claim 9
Dependent Claim
26 words
An optical measuring cell as claimed in claim 7 comprising a base member made from opaque reflective plastics material having a transparent plastics cover fixed thereto.
Claim 10
Dependent Claim
27 words
An optical measuring cell as claimed in claim 7 comprising an extruded clear plastics tube with a reflective coating applied to the back of the base member.
Claim 11
Independent Claim
55 words
A method of optically analysing a fluid, comprising taking an optical measuring cell as claimed in any preceding claim, placing the cell in the fluid whereby the fluid is drawn by capillary action into the channel, passing light through the transparent cover into the channel and analysing the light reflected back through the transparent cover.
References Cited (Backward Citations)
No citation records indexed.
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