Patent ID: 8670177

Claim:
A multifunctional polarizing filter that is attached to a front side of a lens of a digital camera that is used for testing equipment, measuring equipment and medical equipment and functions as a polarizing filter and an ultraviolet cut filter, the multifunctional polarizing filter comprising: a main body that includes an ultraviolet cut glass substrate that is positioned on a light-incident side, and a transmitting glass substrate that is positioned on a camera side, a surface of the ultraviolet cut glass substrate positioned on the light-incident side being polished, and coated with an antireflection coating, an ultraviolet cut thin film formed of a dielectric multilayer film being stacked on a surface of the ultraviolet cut glass substrate positioned on the camera side, a polarizing filter being bonded to a surface of the transmitting glass substrate positioned on the light-incident side through a first adhesive, a surface of the transmitting glass substrate positioned on the camera side being polished, and coated with an antireflection coating, and the ultraviolet cut glass substrate and the transmitting glass substrate being integrated through a second adhesive.