POLIMA 2 (dual beam optical polarizer)
POLIMA 2 is an improved version of image polarimeter POLIMA. This new instrument uses a Savart plate as a dual beam polarization analyzer which allows simultaneous measurement of two orthogonal linear polarization states.
The instrument has a 3.42 arcmin field of view free of vignetting and has a filter wheel (U, B, V, R, I and Halpha bands).
In addition, the polarization analyzer can be removed from the optical path (without unmounting the equipment of the telescope), allowing for imaging (without polarization) with a field of view of 8.39 arcmin. This instrument was built within the framework of collaboration between UNAM and Universidad Iberoamericana.
Documents (Spanish version only):
→ User manual
→ Installation manual
→ Mechanic design
→ Other documents
Contact:
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Comparative table POLIMA vs. POLIMA-2 |
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POLIMA |
POLIMA-2 |
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Optical elements |
Glan-Taylor prism |
Half-wave retarder plate Savart plate |
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Filters |
U, B, V, R |
U, B, V, R, I, Halpha |
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Field of view (vignetting free) |
3.82’ |
3.42’ |
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Number of images per object |
4 |
2 |
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Baffle antirefletion |
NO |
YES |
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Direct imaging (without polarization) |
NO |
YES (8.39’) |