Light-absorbing flange lenses that may be used in the lens stacks of compact lens systems. In a light-absorbing flange lens, the effective area of the lens is composed of a transparent optical material, and at least a portion of the flange of the lens is composed of an optical material that absorbs at least a portion of the light that enters the flange. Using light-absorbing flange lenses may allow the lens barrel to be eliminated from the lens system, thus reducing the X-Y dimensions of the lens system when compared to conventional compact lens systems that include a lens stack enclosed in a lens barrel. In addition, using a light-absorbing material in the flanges of the light-absorbing flange lenses may reduce or eliminate optical aberrations such as lens flare, haze, and ghosting in images.

An electronic device includes a processor and a housing having a first surface, a second surface, and a side surface. A touch screen display is exposed through a first area of the first surface. An optical sensor is disposed under a second area of the first surface that is adjacent to the first area. The optical sensor receives and/or emits an infrared ray. The first surface includes a substantially transparent glass layer, an opaque layer disposed between the glass layer and the second surface, and a color layer disposed between the opaque layer and the glass layer. The opaque layer includes an opening, a location and a size of which correspond to at least a portion of the optical sensor when viewed from the first surface. The optical sensor receives and/or emits the infrared ray through the opening, the color layer, and the glass layer.

An electronic device may have a display with an array of pixels configured to display images for a user. The electronic device may have an ambient light sensor for gathering ambient light information. Control circuitry in the electronic device may adjust the brightness level of an image being displayed by the display based on ambient light measurements from the ambient light sensor. The ambient light sensor may be formed from an ambient light sensor module that is aligned with an opening in an opaque masking layer in the display. One or more antireflection layers may be interposed between an inwardly facing surface of the display and an opposing external surface of the ambient light sensor module. The ambient light sensor module may have a light attenuator and other optical structures.

According to an embodiment a device comprises: an image sensor, an optical system comprising at least one lens, and an infrared, IR cut-off filter, transmission characteristics of the IR cut-off filter comprising a ripple with low transmission between wavelengths corresponding to blue and green.

An infrared optical filter may include a glass ceramic layer, a multilayer oxide thin film formed on a first surface of the glass ceramic layer, and a low reflectivity coating layer formed on a second surface of the glass ceramic layer.

The present application provides a preparation method of a hydrogenated composite film and an optical filter, and relates to the field of optical film filter technologies. The preparation method includes: introducing inert gas and hydrogen into a reaction chamber, and bombarding at least two materials in the reaction chamber and the introduced hydrogen using plasma formed by the inert gas, such that the at least two materials are sputtered onto a substrate and react with hydrogen ions generated by the hydrogen to form a hydrogenated composite film layer. The hydrogenated composite film layer includes at least two materials which are co-sputtered onto the same substrate using the sputtering technology to obtain a required material performance, so as to obtain the hydrogenated composite film layer with a refractive index greater than 3.5 and an extinction coefficient less than 0.005 under a wavelength of 700 nm to 1800 nm.

The optical product includes an optical multilayer film which is disposed on one surface or both surfaces of a base directly or via an intermediate film. The optical multilayer film is obtained by alternately disposing an SiO.sub.2 layer and a ZrO.sub.2 layer, forming nine layers in total, such that a first layer counting from the base is the SiO.sub.2 layer. The optical thickness of the SiO.sub.2 layer as the first layer is not greater than 0.120×λ/4 when a design wavelength is λ (500 nm), the optical thickness of the ZrO.sub.2 layer as a second layer is not less than 0.400×λ/4, the optical thickness of the SiO.sub.2 layer as a third layer is not less than 0.230×λ/4, and the optical thickness of the SiO.sub.2 layer as a seventh layer is not less than 0.450×λ/4.

An optical member includes a reflection-scattering unit that reflects and scatters light having a wavelength band which corresponds to at least a portion of a visible wavelength range, and transmits light having a wavelength band which corresponds to at least a portion of an infrared region, wherein rectilinear transmittance for the light having the wavelength band which corresponds to at least the portion of the infrared region is equal to or greater than 75%.

An electronic device may have a display with an array of pixels configured to display images for a user. The electronic device may have an ambient light sensor for gathering ambient light information. Control circuitry in the electronic device may adjust the brightness level of an image being displayed by the display based on ambient light measurements from the ambient light sensor. The ambient light sensor may be formed from an ambient light sensor module that is aligned with an opening in an opaque masking layer in the display. One or more antireflection layers may be interposed between an inwardly facing surface of the display and an opposing external surface of the ambient light sensor module. The ambient light sensor module may have a light attenuator and other optical structures.

Disclosed are an antireflective lens for infrared rays that eliminates wavelengths in an infrared region to thus improve an antireflective effect and a method of manufacturing the same. The antireflective lens for infrared rays may be an antireflective lens used in an infrared band. The antireflective lens includes a lens base part including a base refractive material having a refractive index of about 3.0 or greater and an antireflective coating part formed on a front surface of the lens base part.