Joovv solo 3.0

I am using two polarizers (one for an halogen light source and one for a camera) to measure light reflected in parallel and perpendicular polarization setups. Should the light source used along with the polarizer be a collimated light beam or can it be a diffuse illumination ? (and, if it should, why?)

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Dynamic System Analysis (DSA) includes the LightPath LEDs of an expansion blade option even if that option is not installed.

LightPath LEDTorch

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Source RETAIN tip: H195751 Symptom Dynamic System Analysis (DSA) includes the LightPath LEDs of an expansion blade option even if that option is not installed. Affected configurations The system may be any of the following IBM servers: BladeCenter LS22, type 7901, any model This tip is not software specific. This tip is not option specific. The following system firmware level(s) are affected: Baseboard Management Controller (BMC ) firmware v1.02 Solution This behavior will be corrected in a future release of DSA software and BMC firmware. The target date for this release is scheduled for third quarter 2009. The file will be available from the IBM System x Support web site at the following URL:   http://www.IBM.com/systems/support/ Workaround Ignore the LightPath LEDs in the DSA report that would pertain to the expansion blade if it is not installed.

Dynamic System Analysis (DSA) includes the LightPath LEDs of an expansion blade option even if that option is not installed.

Yes, you should collimate your beam. The reason for this is that polarizers work well at the angles of incidence they were designed for, and increasingly worse at other angles. The reason for this is that they rely on optical reflectivity (and interference for thin film polarizers) of the two orthogonal polarizations, which obviously depends on the angle of incidence. Often, there is an acceptance angle indicated on the polarizer's datasheet. For example, for Glan-Taylor polarizers this angle is usually about 1-2 degrees.