This frame comprises: a front piece; a temple piece; a connection part that is elastic and that connects the front piece and the temple piece; and wiring which electrically connects a front piece-side electrical element provided to the front piece and a temple piece-side electrical element provided to the temple piece, and a portion of which is routed through the space between the front piece and the connection part.

A temple intended to be mounted, by a mounting face, in hinged connection, to a spectacle frame, so as to be able to pivot between one and the other of two stable positions called folded position and unfolded position, respectively.

In particular, the temple comprises, from its proximal end toward a distal end, a first section and a second section. The first section is provided with a first face opposite the mounting face). The second section is in a ball joint with the first section. The first face and the second face are also of complementary shapes so as to allow the fitting of one into the other.

Embodiments of ultrathin eyeglasses are provided. The eyeglasses comprise a frame and temple pieces extending from the frame. The frame and temple pieces are configured to be directly connected using a bearing or a pin, without the need for a separately attached hinge piece. The temple pieces are configured to sit flat against the frame. An eyeglasses case is also provided. The case has a thin profile and is configured to be attached to a smartphone. The connection between the case and the smartphone allows relative rotation between the case and the smartphone.

Embodiments of ultrathin eyeglasses are provided. The eyeglasses comprise a frame and temple pieces extending from the frame. The frame and temple pieces are configured to be directly connected using a bearing or a pin, without the need for a separately attached hinge piece. The temple pieces are configured to sit flat against the frame. An eyeglasses case is also provided. The case has a thin profile and is configured to be attached to a smartphone. The connection between the case and the smartphone allows relative rotation between the case and the smartphone.

An eyepiece for projecting an image to an eye of a viewer includes a waveguide configured to propagate light in a first wavelength range, and a grating coupled to a back surface of the waveguide. The grating is configured to diffract a first portion of the light propagating in the waveguide out of a plane of the waveguide toward a first direction, and to diffract a second portion of the light propagating in the waveguide out of the plane of the waveguide toward a second direction opposite to the first direction. The eyepiece furthers include a wavelength-selective reflector coupled to a front surface of the waveguide. The wavelength selective reflector is configured to reflect light in the first wavelength range and transmit light outside the first wavelength range, such that the wavelength-selective reflector reflects at least part of the second portion of the light back toward the first direction.

An eyepiece for projecting an image to an eye of a viewer includes a waveguide configured to propagate light in a first wavelength range, and a grating coupled to a back surface of the waveguide. The grating is configured to diffract a first portion of the light propagating in the waveguide out of a plane of the waveguide toward a first direction, and to diffract a second portion of the light propagating in the waveguide out of the plane of the waveguide toward a second direction opposite to the first direction. The eyepiece furthers include a wavelength-selective reflector coupled to a front surface of the waveguide. The wavelength selective reflector is configured to reflect light in the first wavelength range and transmit light outside the first wavelength range, such that the wavelength-selective reflector reflects at least part of the second portion of the light back toward the first direction.

An eyepiece includes a planar waveguide having a front surface and a back surface. The eyepiece also includes a grating coupled to the back surface of the planar waveguide and configured to diffract a first portion of the light propagating in the planar waveguide out of a plane of the planar waveguide toward a first direction and to diffract a second portion of the light propagating in the planar waveguide out of the plane of the planar waveguide toward a second direction opposite to the first direction and a wavelength-selective reflector coupled to the front surface of the planar waveguide. The wavelength-selective reflector comprises a multilevel metasurface comprising a plurality of spaced apart protrusions having a pitch and formed of a first optically transmissive material and a second optically transmissive material disposed between the spaced apart protrusions.

An eyepiece includes a planar waveguide having a front surface and a back surface. The eyepiece also includes a grating coupled to the back surface of the planar waveguide and configured to diffract a first portion of the light propagating in the planar waveguide out of a plane of the planar waveguide toward a first direction and to diffract a second portion of the light propagating in the planar waveguide out of the plane of the planar waveguide toward a second direction opposite to the first direction and a wavelength-selective reflector coupled to the front surface of the planar waveguide. The wavelength-selective reflector comprises a multilevel metasurface comprising a plurality of spaced apart protrusions having a pitch and formed of a first optically transmissive material and a second optically transmissive material disposed between the spaced apart protrusions.

Spectacles including auricular devices are described. The spectacles include a structure having a front frame for supporting respective lenses, and a pair of arms articulated to the front frame on laterally opposite sides, each of the arms extending longitudinally between a first end that is articulated to the front frame and a second, opposite end, close to which an end arm portion can make contact with the head at the ear. Each arm extends from the second end into an arm portion that is made of flexible material and bears an element for supporting an auricular device, and the arm portion can move, on account of its flexibility, between an operating position in which the support element is worn at the ear to allow the auricular device to be positioned, and a non-operating position in which the support element is removably held on the end arm portion.

Spectacles including auricular devices are described. The spectacles include a structure having a front frame for supporting respective lenses, and a pair of arms articulated to the front frame on laterally opposite sides, each of the arms extending longitudinally between a first end that is articulated to the front frame and a second, opposite end, close to which an end arm portion can make contact with the head at the ear. Each arm extends from the second end into an arm portion that is made of flexible material and bears an element for supporting an auricular device, and the arm portion can move, on account of its flexibility, between an operating position in which the support element is worn at the ear to allow the auricular device to be positioned, and a non-operating position in which the support element is removably held on the end arm portion.