[Features] · A polarizing plate is a polarizer that can obtain linearly polarized light by making use of the dichroism of polymers. · Structured with a polarizing film sandwiched by transparent plastic sheets. · The extinction ratio is lower in comparison to polarizers (Glan-Thompson, etc.) which make use of birefringence and they are not adequate for high precision measurements. However, they are extremely useful for simple optical experiments from the perspective of them offering excellent affordability. · The element does not contain a mark to indicate the transmission axis.