CU23333A1 - POLARIMETRY AND ABSORPTION MEASUREMENT EQUIPMENT - Google Patents
POLARIMETRY AND ABSORPTION MEASUREMENT EQUIPMENTInfo
- Publication number
- CU23333A1 CU23333A1 CU20070081A CU20070081A CU23333A1 CU 23333 A1 CU23333 A1 CU 23333A1 CU 20070081 A CU20070081 A CU 20070081A CU 20070081 A CU20070081 A CU 20070081A CU 23333 A1 CU23333 A1 CU 23333A1
- Authority
- CU
- Cuba
- Prior art keywords
- photodiodes
- light
- degrees
- pulse
- absorption value
- Prior art date
Links
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Al hacer pasar un haz de luzpulsante y polarizado, proveniente de un LED o de un LáSER semiconductor, por un sisteme optico en el que se coloca la muestra bajo anAlisis y posteriormente hacer pasar dicho haz de luz entre dos fotodiodos dispuestos espacialmente a 90 grados uno del otroy ambos con sus caras de deteccion paralelas al eje de transmision de la luz y el eje de polarizacion orientado a 45 grados del vÉrtice de las aristas en que se unen los fotodiodos, tendremos en las salidas de los dos amplificadores opticos de amplitud constante y fase variable acoplados a cada uno de los fotodiodos la misma senal, o sea, un tren de pulsos con la misma fase, pero al hacer rotar el plano de polarizacion las proyecciones de intencidad de luz sobre los fotodiodos variarA y se desfasarAn las senales a las salidas de los amplificadores, siendo el desfasaje entre los frentes de los pulsos proporcional al Angulo de rotacion del plano de polarizacion de la luz y que se analiza en un circuito digital con este fin. El ancho de los pulsos de cada amplificador independiente es directamente proporcional al valor de absorcion, o sea, mientras mayor sea la absorcion, mayor serA el ancho de los pulsos, de ahí que el promedio de los anchos de los pulsos a la salida de ambos amplificadores es equivalente al valor de la absorcion de la muestra que se mide. El valor polarimÉtrico y el de absorcion se senalizan en un display digital en grados y en por ciento respectivamente.When passing a beam of pulsing and polarized light, coming from an LED or a semiconductor LASER, through an optical system in which the sample is placed under analysis and subsequently passing said beam of light between two photodiodes spatially arranged at 90 degrees one of the other and both with their detection faces parallel to the axis of transmission of the light and the axis of polarization oriented at 45 degrees of the vertex of the edges in which the photodiodes are joined, we will have at the outputs of the two optical amplifiers of constant amplitude and variable phase coupled to each of the photodiodes the same signal, that is, a pulse train with the same phase, but when rotating the polarization plane the projections of light intensity on the photodiodes will vary and the signals will be offset at amplifier outputs, the phase offset between the pulse fronts being proportional to the angle of rotation of the light polarization plane and analyzed in a dig circuit ital for this purpose. The pulse width of each independent amplifier is directly proportional to the absorption value, that is, the greater the absorption, the greater the pulse width, hence the average pulse widths at the output of both Amplifiers is equivalent to the absorption value of the sample being measured. The polarimetric value and the absorption value are indicated on a digital display in degrees and percent respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CU20070081A CU23333A1 (en) | 2007-04-12 | 2007-04-12 | POLARIMETRY AND ABSORPTION MEASUREMENT EQUIPMENT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CU20070081A CU23333A1 (en) | 2007-04-12 | 2007-04-12 | POLARIMETRY AND ABSORPTION MEASUREMENT EQUIPMENT |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CU23333A1 true CU23333A1 (en) | 2008-12-24 |
Family
ID=40227657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CU20070081A CU23333A1 (en) | 2007-04-12 | 2007-04-12 | POLARIMETRY AND ABSORPTION MEASUREMENT EQUIPMENT |
Country Status (1)
| Country | Link |
|---|---|
| CU (1) | CU23333A1 (en) |
-
2007
- 2007-04-12 CU CU20070081A patent/CU23333A1/en unknown
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