Methods, systems and devices for diffractive waveplate lens and mirror systems allowing electronically pointing and focusing light at different focal planes. The system can be incorporated into a variety of optical schemes for providing electrical control of transmission. In another embodiment, the system comprises diffractive waveplates of different functionality to provide a system for controlling not only focusing but other propagation properties of light including direction, phase profile, and intensity distribution. The diffractive waveplate lens and mirror systems are applicable to optical communication systems.

Optical beam steering and focusing systems, devices, and methods that utilize diffractive waveplates are improved to produce high efficiency at large beam deflection angles, particularly around normal incidence, by diffractive waveplate architectures comprising a special combination of liquid crystal polymer diffractive waveplate both layers with internal twisted structure and at a layer with uniform structure.

A light redirecting film in a sandwich-laminated structure is provided. The light redirecting film comprises a first layer, a second layer; and an intermediate layer sandwiched between the first layer and the second layer. The intermediate layer includes a first grating surface having a plurality of first gratings extending in a first grating direction and a second grating surface opposite to the first grating surface having a plurality of second gratings extending in a second grating direction, wherein the first grating direction and the second grating direction cross each other at an angle of 9010, and the first grating surface and the second grating surface of the intermediate layer are gap-filled and planarized with the first layer and the second layer respectively to generate the light redirecting film.

The display device including a first diffraction optical element group, and a second diffraction optical element group, wherein the first diffraction optical element group is constituted by laminating a first diffraction optical element having a first interference pattern corresponding to a wavelength band of one or two of three colors of red, green, and blue of the image light, and a second diffraction optical element having a second interference pattern corresponding to a wavelength band of remaining colors of the three colors, and the second diffraction optical element group is constituted by laminating a third diffraction optical element having a third interference pattern corresponding to a wavelength band of one or two of three colors of red, green, and blue of the image light, and a fourth diffraction optical element having a fourth interference pattern corresponding to a wavelength band of remaining colors of the three colors.

A light redirecting film and a method for manufacturing the same are provided. The light redirecting film comprises a substrate, a first diffraction grating layer of a first curable resin on the substrate and a second diffraction grating layer of a second curable resin on the first diffraction grating layer. Wherein the grating directions of the first diffraction grating layer and the second diffraction grating layer cross each other at an angle of 9010, and the difference of the refractive index of the first curable resin and the second curable resin is no less than 0.1 and no more than 0.3.

A display device of the present disclosure includes, along an optical path of imaging light emitted from an imaging light generation device, a first optical portion having a positive power, a second optical portion including a first diffraction element and having a positive power, a third optical portion having a positive power, and a fourth optical portion including a second diffraction element and having a positive power. In the optical path, the first diffraction element and the second diffraction element diffract the imaging light at least along a primary diffraction plane and a secondary diffraction plane orthogonal to the primary diffraction plane, and a deflection force of the imaging light in the primary diffraction plane is greater than a deflection force of the imaging light in the secondary diffraction plane.

Systems and methods of dispersion compensation in an optical device are disclosed. A holographic optical element may include a set of different holograms in a grating medium. Each hologram in the set may have a corresponding grating vector with a grating frequency and direction. The directions of the grating vectors may vary as a function of the grating frequency. Different holograms in the set may diffract light in a particular direction so that the light emerges from a boundary of the grating medium in a single given direction regardless of wavelength. A prism may be used to couple light into the grating medium. The prism may be formed using materials having dispersion properties that are similar to the dispersion properties of the grating material. The prism may have an input face that receives perpendicular input light. The prism may include multiple portions having different refractive indices.

In a diffractive optical element including a base material, a first resin layer having a diffraction grating shape including plural concentric ring bands, and a second resin layer containing an inorganic particle, the inorganic particle is adjusted to have a number mean particle diameter of 10 nm or less, a first peak in a region in which particle diameters are 2 nm or more and 7.9 nm or less, and a second peak in a region in which particle diameters are larger than those of the first peak in a grain size distribution on a volumetric basis, with the ratio of the maximum intensity of the second peak to the maximum intensity of the first peak being 0.3 or more and 0.8 or less in a grain size distribution.

Techniques for creating a replacement for optical elements with diffractive planar components based on metasurfaces are provided. In one example, a substantially flat optical component for lensing incoming electromagnetic radiation having at least one wavelength and a first phase into outgoing electromagnetic radiation having a second phase is provided.

An example imaging system includes a compound lens. The compound lens may include a series of lens elements. Each of the lens elements has an aspheric surface on each opposite face. The last lens element of the series has a diffractive optic on a face. The compound lens 5 is to image an object in an object plane onto an image sensor at a resolution of at least 150 line pair/mm at a minimum modulation of 0.39 as applied to the object plane across a visible spectrum comprising red, blue and green wavelengths.