GB563774A - Improvements in or relating to photoelectric cells - Google Patents
Improvements in or relating to photoelectric cellsInfo
- Publication number
- GB563774A GB563774A GB3081/43A GB308143A GB563774A GB 563774 A GB563774 A GB 563774A GB 3081/43 A GB3081/43 A GB 3081/43A GB 308143 A GB308143 A GB 308143A GB 563774 A GB563774 A GB 563774A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cell
- curve
- radiation
- sensitivity curve
- photo
- 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
- 230000035945 sensitivity Effects 0.000 abstract 10
- 230000005855 radiation Effects 0.000 abstract 6
- 230000003595 spectral effect Effects 0.000 abstract 3
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
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
- G01J3/51—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors using colour filters
-
- 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
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
- G01J3/51—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors using colour filters
- G01J3/513—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors using colour filters having fixed filter-detector pairs
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
563,774. Photo-electric meters. SANGAMO WESTON, Ltd. Feb. 25, 1943, No. 3081. Convention date, April 16, 1942. [Class 40 (iii)] In order to measure the intensity of light beams in predetermined spectral ranges, two or more photo-electric cells, each having a spectral sensitivity curve differing from the desired curve, and at least one having a light filter to give it a certain sensitivity curve, are subjected to the same radiation and are connected in parallel or in series in addition or in opposition to a measuring instrument, so that the instrument is made to give indications in accordance with the intensity of the radiation in the desired spectral range. For example, to measure the ultra-violet content of a radiation, two photo-electric cells having a sensitivity curve A, Fig. 1, are used. One photo-cell 10, Fig. 2, is provided with an ultra-violet filter 11, which has the sensitivity curve B, B<1>, Fig. 1. The second photo-cell 10A is provided with a filter 11A, which has the sensitivity curve B<1> only. The two cells are both subjected to the radiation to be measured, and are connected in opposition to a measuring instrument 14 so that the output of cell 10A in accordance with curve B<1> cancels out the output of the cell 10 corresponding to the same curve B\ and the measuring instrument indicates only the output of the cell 10 corresponding to the curve B, that is indicates only the ultra-violet content of the radiation. In another example, one cell may be made to have a sensitivity curve F1, Fig. 8, and a second cell the sensitivity curve F2, so that both cells when connected give a sensitivity curve (F1 +F2), Fig. 9 ; and a third cell is provided having a sensitivity curve F3 and is so connected as to change the overall sensitivity to a desired curve E. The cells may be arranged side by side or one cell may be over another, in which case, the upper cell must be smaller than the one below or must have one or more perforations to allow the radiation to pass to the cell below.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US563774XA | 1942-04-16 | 1942-04-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB563774A true GB563774A (en) | 1944-08-29 |
Family
ID=22003985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3081/43A Expired GB563774A (en) | 1942-04-16 | 1943-02-25 | Improvements in or relating to photoelectric cells |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB563774A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2675488A (en) * | 1951-01-06 | 1954-04-13 | Everett H Bickley | Scanning apparatus for color sorting |
| US2900523A (en) * | 1955-09-16 | 1959-08-18 | Ruzicka Otakar | Photocolorimetric device |
-
1943
- 1943-02-25 GB GB3081/43A patent/GB563774A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2675488A (en) * | 1951-01-06 | 1954-04-13 | Everett H Bickley | Scanning apparatus for color sorting |
| US2900523A (en) * | 1955-09-16 | 1959-08-18 | Ruzicka Otakar | Photocolorimetric device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US1848874A (en) | fitz gerald | |
| MX168317B (en) | APPARATUS TO EVALUATE THE QUALITY OF RICE GRAINS | |
| Tyler | Natural Water as a Monochromator 1 | |
| US3598994A (en) | Method and apparatus for sensing fluorescent substances | |
| US2939361A (en) | Photometric apparatus compensated for fluctuations in light source intensity | |
| US2382439A (en) | Color grading apparatus and method | |
| GB1330101A (en) | Method of nondestructive measurement of the state of a surface | |
| US2203036A (en) | Apparatus for measuring the color of light | |
| Corliss | Oscillator Strengths for Lines of NiI | |
| GB563774A (en) | Improvements in or relating to photoelectric cells | |
| US3066570A (en) | Apparatus for color analysis | |
| GB859104A (en) | Level sensors | |
| GB522028A (en) | Method and apparatus for measuring the colour of light | |
| US3008369A (en) | Optical thickness gauge | |
| GB1013740A (en) | Improvements in or relating to optical measuring or indicating instruments | |
| KR870005241A (en) | Color quantification device for precise measurement of parameters inducing color change | |
| SE8403318D0 (en) | spectrometer | |
| GB808505A (en) | Method of and apparatus for classifying fibres | |
| SU132839A1 (en) | Photoelectric color comparator | |
| GB416553A (en) | Improvements in or relating to exposure-meters for photographic purposes | |
| GB335179A (en) | Improvements in means of measuring intensity of light | |
| Joshi et al. | Light-Effect in Chlorine under Electrical Discharge: Influence of the Gas Pressure | |
| SU64373A1 (en) | Device for measuring high frequency current | |
| DE847470C (en) | Device for the numerical recording of the amount of suspended particles in a solution | |
| SU597930A1 (en) | Automatic photometer |