Optical lens

摘要

An optical lens includes a lens, at least one light absorbing layer, and at least one optical membrane. The lens has a central region and a peripheral region surrounding the central region. The at least one light absorbing layer and the at least one optical membrane are disposed on the lens, located in the peripheral region and expose the central region. Each optical membranes includes at least one first layer and at least one second layer. Refraction index of the at least one second layer is lower than refraction index of the at least one first layer. The at least one first layer and the at least one second layer are stacked alternatively, and at least one of extinction coefficients of the at least one first layer and the at least one second layer within a wavelength range of visible light is larger than zero.

主权项

1. An optical lens, comprising:
a lens, having a central region and a peripheral region surrounding the central region; at least one light absorbing layer, disposed on the lens, wherein each light absorbing layer is located in the peripheral region and exposes the central region; and at least one optical membrane, disposed on the lens, and the at least one optical membrane and the at least one light absorbing layer overlapping in an optical axis direction of the optical lens, wherein each optical membrane is located in the peripheral region and exposes the central region, each optical membrane comprises at least one first layer and at least one second layer, refraction index of the at least one second layer is lower than refraction index of the at least one first layer, the at least one first layer and the at least one second layer are stacked alternatively, and at least one of extinction coefficients of the at least one first layer and the at least one second layer within a wavelength range of visible light is larger than zero.