A hologram is constructed from individual subholograms assigned to corresponding encoding regions in a light modulation device and respectively assigned to an object point of the object to be reconstructed with the hologram. With a virtual observer window, a defined viewing region is provided through which a reconstructed scene in a reconstruction space is observed by an observer. A complex value of a wavefront for each individual object point is calculated in the virtual observer window. Each individual amplitude of a complex value of a wavefront in the virtual observer window is subsequently multiplied by a correction value with which a correction of the angle selectivity of at least one volume grating arranged downstream in the beam path of the light modulation device is carried out. The corrected complex values determined in this way for all object points are summed and transformed into the hologram plane of the light modulation device

The invention is directed to a spectacle lens and includes a body which is transparent or at least partly transparent to light and has a phase object which guides the light incident at an angle of incidence on a side facing away from an observer into a direction depending on the wavelength of the light and the angle of incidence thereof. The phase object has a multiplicity of diffraction structures, which diffract monochromatic light at a wavelength of 380 nm800 nm with a diffraction efficiency of 70% into one and same order of diffraction |m|1 when the monochromatic light is incident at an angle of incidence on the side of the lens facing away from the observer which lies within a diffraction-structure-specific angle interval 15 wide and dependent on the wavelength of the light.

A hologram is constructed from individual subholograms assigned to corresponding encoding regions in a light modulation device and respectively assigned to an object point of the object to be reconstructed with the hologram. With a virtual observer window, a defined viewing region is provided through which a reconstructed scene in a reconstruction space is observed by an observer. A complex value of a wavefront for each individual object point is calculated in the virtual observer window. Each individual amplitude of a complex value of a wavefront in the virtual observer window is subsequently multiplied by a correction value with which a correction of the angle selectivity of at least one volume grating arranged downstream in the beam path of the light modulation device is carried out. The corrected complex values determined in this way for all object points are summed and transformed into the hologram plane of the light modulation device.

A method includes identifying one or more codewords of a bit sequence that fail to satisfy at least one codeword constraint. The method also includes removing the one or more codewords from the bit sequence to generate a punctured bit sequence. The method further includes determining whether the punctured bit sequence is symmetric. The method includes, in response to determining that the punctured bit sequence is symmetric, generating a hermitian symmetric codebook primitive based at least in part on the punctured bit sequence, where the hermitian symmetric codebook primitive is useable to form a diffractive optical element (DOE) of a structured light depth sensing system.

A method includes identifying one or more codewords of a bit sequence that fail to satisfy at least one codeword constraint. The method also includes removing the one or more codewords from the bit sequence to generate a punctured bit sequence. The method includes, in response to determining that the punctured bit sequence is symmetric, generating a hermitian symmetric codebook primitive based at least in part on the punctured bit sequence, where the hermitian symmetric codebook primitive is useable to form a diffractive optical element (DOE) of a structured light depth sensing system.

A diffractive optical element including microstructures, along a surface of an optical material, having a phase profile to diffract input illumination into structured light of a plurality of different diffraction orders; wherein the phase profile is at least partially phase unwrapped is disclosed. Methods of generating the diffractive optical element is also disclosed.

A method of conical anisotropic rigorous coupled wave analysis for grating and a computing device are disclosed. The method includes: obtaining a target geometric phase .sub.g for the anisotropic-material-based grating; obtaining a slow axis azimuth angle .sub.c(x) of the anisotropic-material-based grating according to the target geometric phase .sub.g; obtaining a permittivity tensor of the anisotropic-material-based grating, wherein the anisotropic-material-based grating has an ordinary index n.sub.o and an extraordinary index n.sub.e, the anisotropic-material-based grating has a slow axis polar angle .sub.c and slow axis azimuth angle .sub.c(x), and the permittivity tensor is based on n.sub.o, n.sub.e, .sub.c and .sub.c(x); applying the permittivity tensor into Maxwell equations; obtaining electromagnetic field for the anisotropic-material-based grating by using boundary conditions of at least two layers or sublayers of the anisotropic-material-based grating to obtain a diffraction efficiency for the anisotropic-material-based grating.

A light guide member according to an embodiment comprises at least one light guide from among a first light guide, a second light guide and a third light guide, wherein each of the first light guide, the second light guide and the third light guide includes a structure that reacts to light of different wavelength ranges, the first light guide includes a first substrate and a first structure, which is arranged on the first substrate and reacts to light of a first wavelength range, the first wavelength is 380 nm to 500 nm, the first structure is formed from an aggregate of a plurality of first unit structures, the structure of the first unit structures includes a first protrusion, the first protrusion protrudes in a first direction, and the first protrusion is symmetrical with respect to a second direction by having, as the axis thereof, the first direction line, which passes through the center of the first unit structure.

An imaging device is presented for use in an imaging system capable of improving the image quality. The imaging device has one or more optical systems defining an effective aperture of the imaging device. The imaging device comprises a lens system having an algebraic representation matrix of a diagonalized form defining a first Condition Number, and a phase encoder utility adapted to effect a second Condition Number of an algebraic representation matrix of the imaging device, smaller than said first Condition Number of the lens system.

A binary Fourier grating for producing a specified spectral response includes a plurality of grating superstructures disposed sequentially adjacent with respect to one another along a propagation direction of a light signal. Each of the grating superstructures have sequential sections with alternating refractive indices and one or more phase shift sections in which the refractive index does not alternate. A location of the one or more phase shift sections determines reflections at specified wavelengths and suppression of reflections outside of the specified wavelengths and a length of the grating superstructure determines a wavelength spacing between the specified wavelengths to thereby produce the specified spectral response.