Abstract: An optical lens assembly includes a plurality of lens elements, a filter, and a plurality of layer stacks. The lens elements are arranged in sequence from an object side to an image side along an optical of the optical lens assembly. Each of the lens elements includes an object-side surface and an image-side surface. At least one of the lens elements has a material capable of absorbing visible light. The filter is disposed between the lens elements and the image side and has transmittance less than 1% for light having a wavelength band greater than 1050 nm. The layer stacks are respectively stacked on the object-side surfaces and the image-side surfaces of the lens elements, so that transmittance of the optical lens assembly is greater than 95% for light having a wavelength band from 800 nm to 1000 nm.

Abstract: An optical lens assembly includes a plurality of lens elements, a filter, and a plurality of layer stacks. The lens elements are arranged in sequence from an object side to an image side along an optical of the optical lens assembly. Each of the lens elements includes an object-side surface and an image-side surface. At least one of the lens elements has a material capable of absorbing visible light. The filter is disposed between the lens elements and the image side and has transmittance less than 1% for light having a wavelength band greater than 1050 nm. The layer stacks are respectively stacked on the object-side surfaces and the image-side surfaces of the lens elements, so that transmittance of the optical lens assembly is greater than 95% for light having a wavelength band from 800 nm to 1000 nm.

Abstract: Example embodiments provide for an optical lens assembly and imaging lens with IR light filtering. The lens comprises a body having two surfaces and a plurality of layers of optical thin film layered along a direction formed on at least one surface. The optical thin films comprise less than 20 layers and thicker than 400 nm and thinner than 2000 nm thickness. Through the alternately layered layers of optical thin film, the transmittance of the lens for incident light in infrared ray band is reduced. Therefore, the infrared ray is mostly filtered without use of an additional infrared ray filter.

Abstract: 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.

Abstract: Example embodiments provide for an optical lens assembly and imaging lens with IR light filtering. The lens comprises a body having two surfaces and a plurality of layers of optical thin film layered along a direction formed on at least one surface. The optical thin films comprise less than 20 layers and thicker than 400 nm and thinner than 2000 nm thickness. Through the alternately layered layers of optical thin film, the transmittance of the lens for incident light in infrared ray band is reduced. Therefore, the infrared ray is mostly filtered without use of an additional infrared ray filter.