Precision glass polarisation filter, which is in a mounting on a steel rod and can be rotated on a ball-bearing. With angular scale marked in 1° intervals.
Aperture: 38 mm dia.
Extinction coefficient: >99.9 % at λ = 450 – 750 nm
Height of optical axis: 150 mm
Mounting: 100 mm dia.
Stem: 10 mm dia.
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