There is provided an image pickup element including a non-planar layer having a non-planar light incident surface in a light receiving region, and a microlens of an inorganic material which is provided on a side of the light incident surface of the non-planar layer, and collects incident light.

A light detecting device is provided with: a filter array including filters arranged two-dimensionally, each of the filters having a light-incident surface and a light-emitting surface, the filters including multiple types of filters having mutually different transmission spectra; and an image sensor having a light-detecting surface facing the light-emitting surface, the image sensor being provided with light-detecting elements arranged two-dimensionally on the light-detecting surface, wherein the distance between the light-emitting surface and the light-detecting surface is different for each of the filters.

A head-up display is mountable on a movable body, and includes a first display panel, a reflective optical element, and an optical member. The first display panel displays a first image. The reflective optical element at least partially reflects image light from the first image displayed by the first display panel toward a user of the movable body. The optical member is between the display panel and the reflective optical element and is light transmissive. The display panel includes a surface facing a surface of the optical member. Each of the surface of the display panel and the surface of the optical member includes a reflection reduction layer to reduce light reflection.

There is provided a laminate in which when the protective plate breaks due to an impact, not only the scattering of large broken pieces but the scattering of powdery fine broken pieces can be suppressed. A laminate including an adherend and an adjacent layer, wherein the adherend has a first major surface, a second major surface being a back surface of the first major surface, and a lateral surface connecting an edge of the first major surface and an edge of the second major surface, at least the first major surface and the lateral surface of the adherend are covered with the adjacent layer, the adjacent layer has at least a plastic film and a hard coat layer containing a cured product of a curable resin composition in this order from the adherend side, and a softening point F1 of the plastic film and a softening point F2 of the hard coat layer satisfy a relationship of F1<F2.

Provided is a meta-optical device including a substrate, a first meta-structure layer provided on the substrate, the first meta-structure layer including a first nanostructure having a sub-wavelength shape dimension and a first peripheral material provided adjacent to the first nanostructure, a second meta-structure layer provided on the first meta-structure layer, the second meta-structure layer including a second nanostructure having the sub-wavelength shape dimension and a second peripheral material provided adjacent to the second nanostructure, and a first functional layer provided between the first meta-structure layer and the second meta-structure layer, the first functional layer including a first-first layer having an etch rate that is lower than an etch rate of the second peripheral material, and a first-second layer having a refractive index that is different from a refractive index of the first-first layer.

Provided is a meta-optical device including a substrate, a first meta-structure layer provided on the substrate, the first meta-structure layer including a first nanostructure having a sub-wavelength shape dimension and a first peripheral material provided adjacent to the first nanostructure, a second meta-structure layer provided on the first meta-structure layer, the second meta-structure layer including a second nanostructure having the sub-wavelength shape dimension and a second peripheral material provided adjacent to the second nanostructure, and a first functional layer provided between the first meta-structure layer and the second meta-structure layer, the first functional layer including a first-first layer having an etch rate that is lower than an etch rate of the second peripheral material, and a first-second layer having a refractive index that is different from a refractive index of the first-first layer.

A wide-angle lens (100) includes a front group (110), an aperture (80), and a rear group (120). The front group (110) includes a first lens (10) and a second lens (20) arranged from a side (La) closest to an object to an image side (Lb). In such a wide-angle lens, to suppress an occurrence of a ghost caused by multiple reflection between a lens surface (102) of the first lens (10) on the image side (Lb) and a lens surface (21) of the second lens (20) on the object side (La), the sag amount Sag21 (mm) and the diameter D21 (mm) of the lens surface (21) satisfy the following conditional expression: 0<|Sag21/(D21/2)|<0.125.

A wide-angle lens (100) includes a front group (110), an aperture (80), and a rear group (120). The front group (110) includes a first lens (10) and a second lens (20) arranged from a side (La) closest to an object to an image side (Lb). In such a wide-angle lens, to suppress an occurrence of a ghost caused by multiple reflection between a lens surface (102) of the first lens (10) on the image side (Lb) and a lens surface (21) of the second lens (20) on the object side (La), the sag amount Sag21 (mm) and the diameter D21 (mm) of the lens surface (21) satisfy the following conditional expression: 0<|Sag21/(D21/2)|<0.125.

A solid-state imaging device having a first area and a second area surrounding the first area is provided. The solid-state imaging device includes a substrate having a plurality of photoelectric conversion elements. The solid-state imaging device also includes a color filter layer disposed on the substrate. The color filter layer includes a plurality of color filter segments corresponding to the plurality of photoelectric conversion elements. The solid-state imaging device further includes an optical waveguide layer over the color filter layer. The optical waveguide layer includes a waveguide partition grid, a waveguide material in spaces of the waveguide partition grid, and an anti-reflection film on the waveguide partition grid and the waveguide material. The width of the top of the waveguide partition grid is larger than the width of the bottom of the waveguide partition grid.

A solid-state imaging device having a first area and a second area surrounding the first area is provided. The solid-state imaging device includes a substrate having a plurality of photoelectric conversion elements. The solid-state imaging device also includes a color filter layer disposed on the substrate. The color filter layer includes a plurality of color filter segments corresponding to the plurality of photoelectric conversion elements. The solid-state imaging device further includes an optical waveguide layer over the color filter layer. The optical waveguide layer includes a waveguide partition grid, a waveguide material in spaces of the waveguide partition grid, and an anti-reflection film on the waveguide partition grid and the waveguide material. The width of the top of the waveguide partition grid is larger than the width of the bottom of the waveguide partition grid.