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Beam Splitting Glan Thompson Polarizers
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Conventional Glan Thompson polarizers are designed to transmit the p-polarization extraordinary beam undeviated, and to absorb the reflected ordinary beam at the black paint. If this component is required, however, an escape window is necessary to transmit the beam out. The PTBS series of beam splitting Glan Thompson polarizers has been designed with one polished side exit surface to transmit the full aperture and cone angle of radiation.
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The s-component beam emerges normal to the escape window; and there is no chromatic dispersion on the deviation between the input beam and this side exit beam. These polarizers have a 2·5:1 length to aperture ratio with a full acceptance cone angle of more than 15° @ 589nm, symmetric about the input axis.
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Mounts
These polarizers are supplied unmounted as free components unless mounting is specified at the time of ordering. The mount design gives open access to all three beams and facilitates occasional cleaning. To specify mounted polarizers, simply add suffix:
M1 for Type 1 mount (shown)
RM4 for Type 4 rotation mount
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Specifications
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Model #
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Aperture (mm)
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L/A Ratio
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Spectral Range (nm)
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Peak Trans. (%)
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Extinc. Ratio
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Beam Dev. (min)
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Flatness @NaD
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Max CW Power (W/cm2)
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Mount Dia. (mm)
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Mount Length (mm)
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PTBS7
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7
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2.5
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350-2500
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90
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10-5
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<3
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lambda/8
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1
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25.4
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36
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PTBS10
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10
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2.5
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350-2500
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90
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10-5
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<3
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lambda/8
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1
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25.4
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44
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PTBS12
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12
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2.5
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350-2500
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90
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10-5
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<3
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lambda/8
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1
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31.8
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49
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PTBS15
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15
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2.5
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350-2500
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90
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10-5
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<3
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lambda/8
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1
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31.8
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56
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