GB1114333A - A spectrophotometer for measurement of derivative spectra - Google Patents
A spectrophotometer for measurement of derivative spectraInfo
- Publication number
- GB1114333A GB1114333A GB3594666A GB3594666A GB1114333A GB 1114333 A GB1114333 A GB 1114333A GB 3594666 A GB3594666 A GB 3594666A GB 3594666 A GB3594666 A GB 3594666A GB 1114333 A GB1114333 A GB 1114333A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sample
- beams
- cells
- wavelength
- aug
- 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
- 238000001228 spectrum Methods 0.000 title abstract 3
- 238000005259 measurement Methods 0.000 title 1
- 230000003595 spectral effect Effects 0.000 abstract 2
- 238000002835 absorbance Methods 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 238000000862 absorption spectrum Methods 0.000 abstract 1
- 238000011835 investigation Methods 0.000 abstract 1
- 230000000873 masking effect Effects 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 abstract 1
Classifications
-
- 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
- G01J3/42—Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry
- G01J3/433—Modulation spectrometry; Derivative spectrometry
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Spectrometry And Color Measurement (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
1,114,333. Spectrophotometer. SHIMADZU SEISAKUSHO Ltd. Aug. 11,1966 [Aug. 14, 1965], No. 35946/66. Heading G1A. [Also in Division G2] The derivative spectrum of a sample (i. e. the plot of the first differential of the absorbance of the sample against wavelength) is obtained by producing a pair of mono-chromatic light beams B, B<SP>1</SP> having the same spectral band width, masking part of each beam, using aperture masks M, M<SP>1</SP> , so that the unmasked portions of the beams have particular wavelengths which differ from one another by a small amount, passing these portions through respective cells C, C<SP>1</SP>, both containing the sample under investigation, and detecting the light transmitted by the cells. The outputs from detectors 23, 23<SP>1</SP> (which may be photo-multipliers) are compared to produce a ratio, which is converted to a logarithmic value, and plotted, while the wavelength of the original spectral band width is changed. In the derivative spectrum produced, features such as overlapping absorption bands of a sample show up more clearly than in the usual absorption spectrum Figs. 1-3, (not shown). The optical system includes a source 10, a mirror system 11-13 leading the beam into the prism monochromator 14 which produces the required beam. This is split into the two equal wavelength beams B, B<SP>1</SP> by splitter 19 after collimation and chopping at 17,18 respectively. The sample beam paths contain attenuators 21, 21<SP>1</SP> and cylindrical lenses 22, 22<SP>1</SP> besides the sample cells C, C<SP>1</SP> and slits S, S<SP>1</SP> provided by aperture masks M, M<SP>1</SP>.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4941765 | 1965-08-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1114333A true GB1114333A (en) | 1968-05-22 |
Family
ID=12830477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3594666A Expired GB1114333A (en) | 1965-08-14 | 1966-08-11 | A spectrophotometer for measurement of derivative spectra |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1298733B (en) |
| GB (1) | GB1114333A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110455744A (en) * | 2019-08-29 | 2019-11-15 | 南京林业大学 | A kind of portable visible spectrophotometer based on tunable liquid crystal filter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2648249A (en) * | 1948-02-28 | 1953-08-11 | Gen Electric | Frequency modulated photometer |
-
1966
- 1966-08-11 GB GB3594666A patent/GB1114333A/en not_active Expired
- 1966-08-12 DE DE1966S0105354 patent/DE1298733B/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110455744A (en) * | 2019-08-29 | 2019-11-15 | 南京林业大学 | A kind of portable visible spectrophotometer based on tunable liquid crystal filter |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1298733B (en) | 1969-07-03 |
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