GB1313427A - Flight measuring apparatus - Google Patents
Flight measuring apparatusInfo
- Publication number
- GB1313427A GB1313427A GB2455270A GB2455270A GB1313427A GB 1313427 A GB1313427 A GB 1313427A GB 2455270 A GB2455270 A GB 2455270A GB 2455270 A GB2455270 A GB 2455270A GB 1313427 A GB1313427 A GB 1313427A
- Authority
- GB
- United Kingdom
- Prior art keywords
- voltage
- photo
- multiplier
- current
- densitometer
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems
-
- 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
- G01N21/84—Systems specially adapted for particular applications
- G01N21/86—Investigating moving sheets
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
1313427 Densitometer W CHILDERS 21 May 1970 [22 May 1969] 24552/70 Heading G1A In a densitometer in which the dynodes of a photo-multiplier are energized by a capacitor 25 in an R.C. circuit in which the voltage disc exponentially, a pulse developed by a comparison of a reference current with the photo-multiplier current in a level detector 30 is applied to start a counter 51, 52, 54, 55 when the photo-multiplier current which is a function of voltage and incident light reaches a predetermined value and a stop pulse is arranged to terminate the count when a zero density equivalent voltage is detected by amplifier 40 and reference voltage 43. The capacitor is charged by the operation of start switch 18, and the cathode and first dynode are energized from a floating source 19. The count which is equivalent to density is stored in the counters and transferred to indicators 2, 3, 4. Light is led to and from the object by light guides in a head-movable across the surface. The exponential decay rate may be adjusted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US82678869A | 1969-05-22 | 1969-05-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1313427A true GB1313427A (en) | 1973-04-11 |
Family
ID=25247534
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2455270A Expired GB1313427A (en) | 1969-05-22 | 1970-05-21 | Flight measuring apparatus |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS5420869B1 (en) |
CH (1) | CH524138A (en) |
DE (1) | DE2023694A1 (en) |
FR (1) | FR2048596A5 (en) |
GB (1) | GB1313427A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3806718A (en) * | 1972-05-31 | 1974-04-23 | Union Carbide Corp | Calibration circuit suitable for centrifugal type chemical analyzer |
DE2834642A1 (en) * | 1978-08-08 | 1980-02-28 | Bosch Gmbh Robert | Measurement of soot in diesel engine exhausts - using filter paper and monitoring with a light beam followed by digital monitoring system |
-
1970
- 1970-05-14 DE DE19702023694 patent/DE2023694A1/en active Pending
- 1970-05-20 CH CH745370A patent/CH524138A/en not_active IP Right Cessation
- 1970-05-21 GB GB2455270A patent/GB1313427A/en not_active Expired
- 1970-05-21 FR FR7018411A patent/FR2048596A5/fr not_active Expired
- 1970-05-22 JP JP4395670A patent/JPS5420869B1/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
FR2048596A5 (en) | 1971-03-19 |
JPS5420869B1 (en) | 1979-07-26 |
CH524138A (en) | 1972-06-15 |
DE2023694A1 (en) | 1970-12-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |