WO1998035209A3 - Photodetector - Google Patents

Photodetector Download PDF

Info

Publication number
WO1998035209A3
WO1998035209A3 PCT/GB1998/000403 GB9800403W WO9835209A3 WO 1998035209 A3 WO1998035209 A3 WO 1998035209A3 GB 9800403 W GB9800403 W GB 9800403W WO 9835209 A3 WO9835209 A3 WO 9835209A3
Authority
WO
WIPO (PCT)
Prior art keywords
photosensor
chamber
photodetector
layer
open end
Prior art date
Application number
PCT/GB1998/000403
Other languages
French (fr)
Other versions
WO1998035209A2 (en
Inventor
Malcolm Robert Snowball
Original Assignee
Water Recovery Plc
Malcolm Robert Snowball
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Water Recovery Plc, Malcolm Robert Snowball filed Critical Water Recovery Plc
Priority to AU59995/98A priority Critical patent/AU5999598A/en
Publication of WO1998035209A2 publication Critical patent/WO1998035209A2/en
Publication of WO1998035209A3 publication Critical patent/WO1998035209A3/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/0252—Constructional arrangements for compensating for fluctuations caused by, e.g. temperature, or using cooling or temperature stabilization of parts of the device; Controlling the atmosphere inside a photometer; Purge systems, cleaning devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/0271—Housings; Attachments or accessories for photometers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/04—Optical or mechanical part supplementary adjustable parts
    • G01J1/0407—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
    • G01J1/0462—Slit arrangements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/05—Means for preventing contamination of the components of the optical system; Means for preventing obstruction of the radiation path
    • G01J5/051—Means for preventing contamination of the components of the optical system; Means for preventing obstruction of the radiation path using a gas purge
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/08—Optical arrangements
    • G01J5/0856—Slit arrangements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J2001/0276—Protection
    • G01J2001/028—Protection against liquid

Abstract

A photodetector for detecting photo intensity through a liquid comprises a body (15), which defines a chamber (17) that is open at one end, a photosensor (14) mounted to the body and arranged to sense light entering the chamber (17) through its open end, a layer of air being disposed in the chamber between the photosensor and the open end of the chamber. The layer of air forms a barrier between the photosensor (14) and the liquid and thus slime and other matter is unable to build up in front of the photosensor.
PCT/GB1998/000403 1997-02-08 1998-02-09 Photodetector WO1998035209A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU59995/98A AU5999598A (en) 1997-02-08 1998-02-09 Photodetector

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9702599.3A GB9702599D0 (en) 1997-02-08 1997-02-08 Photodetector
GB9702599.3 1997-02-08

Publications (2)

Publication Number Publication Date
WO1998035209A2 WO1998035209A2 (en) 1998-08-13
WO1998035209A3 true WO1998035209A3 (en) 1998-09-17

Family

ID=10807299

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1998/000403 WO1998035209A2 (en) 1997-02-08 1998-02-09 Photodetector

Country Status (3)

Country Link
AU (1) AU5999598A (en)
GB (1) GB9702599D0 (en)
WO (1) WO1998035209A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9989410B2 (en) * 2014-11-25 2018-06-05 Heraeus Noblelight America Llc Tunable photo-detector device
CN105352592B (en) * 2015-08-07 2018-06-08 佛山市美的清湖净水设备有限公司 Ultraviolet intensity detects frock and ultraviolet lamp fixing device who is applicable to it
US20190316940A1 (en) * 2018-04-12 2019-10-17 Frost Control Systems, Inc. Measurement system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3827752A1 (en) * 1988-08-16 1990-02-22 Harald Dipl Ing Gosebruch Method and apparatus for detecting the surface of grinding wheels
EP0456202A2 (en) * 1990-05-11 1991-11-13 Applied Materials, Inc. Particle monitor system and method
US5493124A (en) * 1994-04-28 1996-02-20 Infilco Degremont, Inc. Apparatus for measuring radiation transmittance of a process fluid

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3827752A1 (en) * 1988-08-16 1990-02-22 Harald Dipl Ing Gosebruch Method and apparatus for detecting the surface of grinding wheels
EP0456202A2 (en) * 1990-05-11 1991-11-13 Applied Materials, Inc. Particle monitor system and method
US5493124A (en) * 1994-04-28 1996-02-20 Infilco Degremont, Inc. Apparatus for measuring radiation transmittance of a process fluid

Also Published As

Publication number Publication date
WO1998035209A2 (en) 1998-08-13
GB9702599D0 (en) 1997-03-26
AU5999598A (en) 1998-08-26

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