An ocular optical system includes a first lens element and a second lens element from an eye-side to a display-side in order along an optical axis. The first lens element and the second lens element each include an eye-side surface and a display-side surface. The display-side surface of the second lens element has a concave portion in a vicinity of a periphery thereof. The ocular optical system satisfies 2.000≤G2D/T1 and ER/G12≤20.000, wherein G2D is a distance from the second lens element to the display screen along the optical axis, T1 is a thickness of the first lens element along the optical axis, ER is a distance from a pupil of the eye of the observer to the first lens element along the optical axis, and G12 is an air gap from the first lens element to the second lens element along the optical axis.

Disclosed are transparent energy relay waveguide systems for the superimposition of holographic opacity modulation states for holographic, light field, virtual, augmented and mixed reality applications. The light field system may comprise one or more energy waveguide relay systems with one or more energy modulation elements, each energy modulation element configured to modulate energy passing therethrough, whereby the energy passing therethrough may be directed according to 4D plenoptic functions or inverses thereof.

Disclosed are transparent energy relay waveguide systems for the superimposition of holographic opacity modulation states for holographic, light field, virtual, augmented and mixed reality applications. The light field system may comprise one or more energy waveguide relay systems with one or more energy modulation elements, each energy modulation element configured to modulate energy passing therethrough, whereby the energy passing therethrough may be directed according to 4D plenoptic functions or inverses thereof.

A device and a system includes a head-up display intended to be used to display projected images on surface such as an interior surface of a vehicle windshield. The device and system more particularly relates to a holographic head-up display device, a light module comprising a light source, together with a spatial light modulator displaying a computer-generated hologram once unmodulated beams are filtered using an optical filter. Said HUD device further comprises a head-tracking system for measurement of and adjustment according to interpupillary distance, a processor circuitry for said adjustment and processing pertaining thereto to be undertaken, as well as an optical steering apparatus.

Disclosed are systems and methods for manufacturing energy relays for energy directing systems and Transverse Anderson Localization. Systems and methods include providing first and second component engineered structures with first and second sets of engineered properties and forming a medium using the first component engineered structure and the second component engineered structure. The forming step includes randomizing a first engineered property in a first orientation of the medium resulting in a first variability of that engineered property in that plane, and the values of the second engineered property allowing for a variation of the first engineered property in a second orientation of the medium, where the variation of the first engineered property in the second orientation is less than the variation of the first engineered property in the first orientation.

Disclosed are systems and methods for manufacturing energy relays for energy directing systems and Transverse Anderson Localization. Systems and methods include providing first and second component engineered structures with first and second sets of engineered properties and forming a medium using the first component engineered structure and the second component engineered structure. The forming step includes randomizing a first engineered property in a first orientation of the medium resulting in a first variability of that engineered property in that plane, and the values of the second engineered property allowing for a variation of the first engineered property in a second orientation of the medium, where the variation of the first engineered property in the second orientation is less than the variation of the first engineered property in the first orientation.

A scope includes an objective lens system having refractive power, a relay lens system having refractive power, and an eyepiece system having refractive power. The relay lens system includes a first, a second, and a third lens groups. The second lens group includes a II-2-1 lens and a II-2-2 lens, and both of which are cemented. The third lens group includes a II-3-1 lens having a convex surface facing an object side and a II-3-2 lens having a convex surface facing an image side, and both of which are cemented. The second lens group and the third lens group can move along an optical axis to change a magnification of the relay lens system and thereby change a magnification of the scope. The objective lens system, the relay lens system, and the eyepiece system are arranged in order from the object side to the image side along the optical axis.

Disclosed is a telescopic sight having two sighting points including an objective lens part which is provided in a telescopic sight body to reflect a light source beam irradiated from a light source part to a user's eye direction and transmitting an object beam and provided with a first focus part; a relay lens part which is provided in the telescopic sight body so as to be disposed between the objective lens part and the user's eye to erect and focus the light source beam and the object beam passing through the first focus part and provided with a second focus part; and an eyepiece lens part which is provided in the telescopic sight body as to be disposed between the relay lens part and the user's eye to eyepiece the light source beam and the object beam passing through the second focus part on the user's eye.

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for determining the identity of a user. In one aspect, a method comprises: obtaining at least one image depicting a reflection of light from a lens that is included in a set of eyeglasses; determining, based on the reflection of light from the lens, a set of features characterizing the lens; and determining an identity of a corresponding user based at least in part on the set of features characterizing the lens.

The present invention discloses a portable zoom microscope, comprising a case (15) and an optical system assembly installed in the case (15), characterized in that the optical system assembly comprises an objective I (1), an objective II (2), an eyepiece III (3), an eyepiece II (4) and an eyepiece I (5) arranged in sequence along an optical axis Z from an object plane to eyes, wherein the objective I (1) is a positive lens, the objective II (2) is a negative lens, the eyepiece III (3) is a positive lens, the eyepiece II (4) is a positive lens, and the eyepiece I (5) is a negative lens, which effectively eliminates the longitudinal chromatic aberration and the lateral colour, so that the zoom microscope can distinguish the details of small objects more clearly and intuitively, greatly improving the image quality of products.