GB1432634A - Optical analyzer for agricultural products - Google Patents
Optical analyzer for agricultural productsInfo
- Publication number
- GB1432634A GB1432634A GB3876073A GB3876073A GB1432634A GB 1432634 A GB1432634 A GB 1432634A GB 3876073 A GB3876073 A GB 3876073A GB 3876073 A GB3876073 A GB 3876073A GB 1432634 A GB1432634 A GB 1432634A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sample
- filter
- photo
- filter wheel
- hold circuits
- 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
- 230000003287 optical effect Effects 0.000 title 1
- 238000005259 measurement Methods 0.000 abstract 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000003780 insertion Methods 0.000 abstract 1
- 230000037431 insertion Effects 0.000 abstract 1
- 238000000424 optical density measurement Methods 0.000 abstract 1
- 102000004169 proteins and genes Human genes 0.000 abstract 1
- 108090000623 proteins and genes Proteins 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/02—Food
- G01N33/10—Starch-containing substances, e.g. dough
-
- 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
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
-
- 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
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3563—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solids; Preparation of samples therefor
-
- 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
- G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
- G01J1/16—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using electric radiation detectors
- G01J1/18—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using electric radiation detectors using comparison with a reference electric value
- G01J2001/182—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using electric radiation detectors using comparison with a reference electric value with SH sample and hold circuits
-
- 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
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/12—Generating the spectrum; Monochromators
- G01J2003/1226—Interference filters
- G01J2003/1243—Pivoting IF or other position variation
-
- 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
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J2003/2866—Markers; Calibrating of scan
-
- 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
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N2021/3129—Determining multicomponents by multiwavelength light
-
- 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
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
- G01N2021/3159—Special features of multiplexing circuits
-
- 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
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/4738—Diffuse reflection, e.g. also for testing fluids, fibrous materials
- G01N2021/4764—Special kinds of physical applications
- G01N2021/4769—Fluid samples, e.g. slurries, granulates; Compressible powdery of fibrous samples
-
- 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
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
-
- 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
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/4738—Diffuse reflection, e.g. also for testing fluids, fibrous materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/12—Circuits of general importance; Signal processing
- G01N2201/128—Alternating sample and standard or reference part in one path
- G01N2201/1283—Opaque part
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
1432634 Photo-electric apparatus NEOTEC CORP 16 Aug 1973 [24 Aug 1972] 38760/73 Heading G1A In photo-electric apparatus particularly adapted for spectrometric measurements, a filter assembly of paddlewheel configuration is used. The apparatus of Fig. 1, suitable for determination of moisture, oil and protein of grain by reflection optical density measurement, comprises a sample tray 16 by which a sample 20 or reference 18 may be located in the light path. As shown a broad-band infrared source 12 illuminates the sample via filter wheel 34, but for other measurements a light source may be used. The filter wheel 34 has opaque vanes 42 mounted at right angles to each filter and this leads to a transmission characteristic shown in Fig. 4 which has dark portions between the contributions by each filter which exhibit a change in wavelength transmitted as the angle of each filter changes with respect to the beam. The rotation of the filter wheel is sensed at 48 to produce a pulsed signal which is counted at 50 and used to control, via decoder 54 the gating of detector output signals from photo-resisters 44 which are amplified at 46, and acted on by logarithmic amplifier 70, to sample-hold circuits 72, 74. The gating sequence is such that detector output levels at two different filter angles ( and thus two different wavelengths) are fed to the respective sample hold circuits, three times per-filter wheel rotation. The differences between each pair of signals are stored in further respective sample hold circuits 82-86, and then passed via calibration stages 88-92 to the computing-display unit 94, which has a common digital display, switchable to a particular computer for a quantity to be measured Fig. 6 (not shown). The computers may be programmed for different types of analysis by insertable cards. The dark periods of the filter wheel are used to record the dark response of the photo-cells in an integrating amplifier in the feedback loop of the main differential amplifier in unit 46. The calibration units are provided with amplifiers having feedback loops containing manually adjustable resistors. When the sample tray is in the position shown, a calibration sample is being analyzed, switch 130 is in a closed position and the feedback loops are connected, so that recalibration may be carried out. A suitable sample holder for insertion into tray 16, is illustrated, Fig. 2 (not shown). Although three filters providing six wavelengths, for the analysis of three components, are shown, less or more may be provided, together with necessary additional circuitry.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US28327072A | 1972-08-24 | 1972-08-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1432634A true GB1432634A (en) | 1976-04-22 |
Family
ID=23085282
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3876073A Expired GB1432634A (en) | 1972-08-24 | 1973-08-16 | Optical analyzer for agricultural products |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS5235549B2 (en) |
CA (1) | CA998851A (en) |
DE (1) | DE2342686C2 (en) |
GB (1) | GB1432634A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2165642A (en) * | 1984-08-14 | 1986-04-16 | Unvala Ltd | Colour measuring apparatus |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5256982A (en) * | 1975-11-05 | 1977-05-10 | Yamamura Glass Co Ltd | Inner quality analyzer |
US4194217A (en) * | 1978-03-31 | 1980-03-18 | Bosch Francois J G Van Den | Method and apparatus for in-vivo spectroscopic analysis |
JPS6311841A (en) * | 1986-03-20 | 1988-01-19 | Satake Eng Co Ltd | Device for evaluation of rice quality |
JPS6357565U (en) * | 1986-09-30 | 1988-04-16 | ||
FI91021C (en) * | 1988-11-04 | 1994-04-25 | Instrumentarium Oy | Apparatus for the identification of gases and measurement of the content and method for the identification of gases |
GB0509611D0 (en) * | 2005-05-11 | 2005-06-15 | Amersham Biosciences Ab | Method and device for imaging a sample |
JP5759117B2 (en) * | 2010-07-07 | 2015-08-05 | 浜松ホトニクス株式会社 | Spectrometer |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2834246A (en) * | 1954-06-16 | 1958-05-13 | Laurence W Foskett | Method and apparatus for absorption spectra analysis |
-
1973
- 1973-08-16 GB GB3876073A patent/GB1432634A/en not_active Expired
- 1973-08-22 JP JP48093427A patent/JPS5235549B2/ja not_active Expired
- 1973-08-22 CA CA179,384A patent/CA998851A/en not_active Expired
- 1973-08-23 DE DE2342686A patent/DE2342686C2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2165642A (en) * | 1984-08-14 | 1986-04-16 | Unvala Ltd | Colour measuring apparatus |
Also Published As
Publication number | Publication date |
---|---|
CA998851A (en) | 1976-10-26 |
JPS49125082A (en) | 1974-11-29 |
DE2342686A1 (en) | 1974-03-07 |
JPS5235549B2 (en) | 1977-09-09 |
DE2342686C2 (en) | 1984-09-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3861788A (en) | Optical analyzer for agricultural products | |
US4040747A (en) | Optical analyzer for agricultural products | |
US4037970A (en) | Optical analyzer for agricultural products | |
US3910701A (en) | Method and apparatus for measuring light reflectance absorption and or transmission | |
GB1426005A (en) | Dual wavelength photometer for absorbance difference measurements | |
US4176916A (en) | Cam filter wheel | |
US4627008A (en) | Optical quantitative analysis using curvilinear interpolation | |
US3646331A (en) | Automatic 100{11 line adjustment of spectrophotometers | |
US4260262A (en) | Grain quality analyzer | |
JP3526652B2 (en) | Optical measuring method and optical measuring device | |
US4310249A (en) | Spectrophotometer | |
US3554654A (en) | Single-beam photometer | |
US3340764A (en) | Color measuring system using a light biased photocell | |
GB1429198A (en) | Photometric analyzer | |
GB2073883A (en) | Method and apparatus for instantaneous band ratioing in a reflectance radiometer | |
US3690772A (en) | Photometer for carrying out measurements at different wave lengths | |
US3458261A (en) | Pulsed light photometric apparatus for measuring light characteristics of moving materials | |
CA1330717C (en) | Concentration determination with multiple wavelength flash photometers | |
US4128339A (en) | Automatically-adjusting photometer | |
US4223995A (en) | Calibration system for spectrophotometers | |
US3955096A (en) | Implicit ratio computer for sequential signals | |
US3923397A (en) | Hematocrit measuring method | |
GB1432634A (en) | Optical analyzer for agricultural products | |
GB1382081A (en) | Transmission spectra | |
US4014612A (en) | Photometric measuring apparatus |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |