GB459278A - Improvements in or relating to means for measuring reflection coefficients - Google Patents
Improvements in or relating to means for measuring reflection coefficientsInfo
- Publication number
- GB459278A GB459278A GB22331/36A GB2233136A GB459278A GB 459278 A GB459278 A GB 459278A GB 22331/36 A GB22331/36 A GB 22331/36A GB 2233136 A GB2233136 A GB 2233136A GB 459278 A GB459278 A GB 459278A
- Authority
- GB
- United Kingdom
- Prior art keywords
- source
- cell
- light
- lens system
- diaphragm
- 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
- G01N21/55—Specular reflectivity
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)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
459,278. Photometric apparatus. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London.-(Assignees of Lange, B. ; 45, Garystrasse, Berlin) Aug. 13, 1936, No. 22331. Convention date, Nov. 25, 1935. [Class 97 (i)] Relates to apparatus for measuring specular reflection coefficients of the type in which a light source 1 and a photo-electric cell 5 are contained in the same housing and form parts of a single unit, light from the source 1 being reflected at the surface 3 whose reflection is to be measured and thereby directed towards the cell. According to the invention, an image of the source 1 is produced on an aperture in a diaphragm 4 shielding the cell from diffused light. As shown in Fig. 1, a single lens system 2 is provided for this purpose, whilst, according to a modification, Fig. 3, two lens systems 2, 2<1> are employed, the source 1 lying at the focus of the lens system 2 and the aperture in the diaphragm 4 at the focus of the lens system 2<1>. Fig. 3 also shows a second rectifier cell 5<1> for measuring light diffused from the surface and screws 6, 6<1> for centring the lamp 1 in its housing. The test object 3 may be replaced by a standard object of known specular reflection coefficient, means being provided for adjusting the indicator of the indicating instrument to a fixed point on its scale when the standard object is in place. U.S.A. Specification 1,939,088 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE459278X | 1935-11-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB459278A true GB459278A (en) | 1937-01-05 |
Family
ID=6539563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22331/36A Expired GB459278A (en) | 1935-11-25 | 1936-08-13 | Improvements in or relating to means for measuring reflection coefficients |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB459278A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2604809A (en) * | 1948-06-01 | 1952-07-29 | Mitchell Reginald Fawn | Optical means for evaluating surface finish by measurement of differential light scattering in a schlieren type optical system |
| US2963938A (en) * | 1956-03-26 | 1960-12-13 | Ford Motor Co | Surface meters for detecting irregularities on transparent elements |
| US3621268A (en) * | 1967-12-19 | 1971-11-16 | Int Standard Electric Corp | Reflection type contactless touch switch having housing with light entrance and exit apertures opposite and facing |
| CN109283159A (en) * | 2018-11-19 | 2019-01-29 | 安徽科技学院 | A kind of animal skin luminance index test device and its application method |
-
1936
- 1936-08-13 GB GB22331/36A patent/GB459278A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2604809A (en) * | 1948-06-01 | 1952-07-29 | Mitchell Reginald Fawn | Optical means for evaluating surface finish by measurement of differential light scattering in a schlieren type optical system |
| US2963938A (en) * | 1956-03-26 | 1960-12-13 | Ford Motor Co | Surface meters for detecting irregularities on transparent elements |
| US3621268A (en) * | 1967-12-19 | 1971-11-16 | Int Standard Electric Corp | Reflection type contactless touch switch having housing with light entrance and exit apertures opposite and facing |
| CN109283159A (en) * | 2018-11-19 | 2019-01-29 | 安徽科技学院 | A kind of animal skin luminance index test device and its application method |
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