Goertek Optical Technology Co., Ltd.

The present disclosure provides an optical module and a head mounted display. The optical module includes a first lens and a second lens sequentially along an optical axis direction, an edge thickness of an air gap between the first lens and the second lens being L 1 , which satisfies: 2 mm<L 1 <7 mm; the optical module further includes a polarizing reflective element, a first phase retarder, and a beam splitting element, wherein the polarizing reflective element is located on a side of the first lens, the beam splitting element is located on a side of the second lens, and the first phase retarder is located between the polarizing reflective element and the beam splitting element.

An optical system and a head mounted display are disclosed. The optical system comprises: a third lens, a second lens and a first lens arranged successively along a propagation direction of incident light. The effective focal length f1 of the first lens and the effective focal length f2 of the second lens are both greater than the effective focal length f of the optical system. The present disclosure provides a solution of a direct transmission optical structure, with short-focus, high light efficiency and high-resolution which has a good imaging quality.

Embodiments of the present disclosure provide an optical module and a head mounted display device. The optical module includes a display, a beam splitter, a phase retarder and a polarization reflecting element, wherein the phase retarder is provided between the beam splitter and the polarization reflecting element. The optical module further includes a first lens and a second lens arranged sequentially, the first lens is provided between the display and the beam splitter and the second lens is provided on one side of the beam splitter away from the display. A ratio of a difference between the optical effective aperture D 2 of the beam splitter and the height D 1 of the effective display area of the display to a distance T between the beam splitter to the display is 2 to 6. In the embodiment of the present disclosure, by providing an optical lens between the beam splitter and the display, the angle at which light is incident to the beam splitter and the angle at which light from the display is incident to the optical lens can be effectively constrained, thereby improving the light efficiency.

Embodiments of the present disclosure provide an optical module and a head mounted display; wherein, the optical module comprises a first lens, a second lens, and a third lens provided sequentially, a beam splitter is provided between the second lens and the first lens, and a first phase retarder and a polarization reflection film provided on either side of the third lens. The first lens is configured for transmitting incident light and an optical path difference between an optical path at a 1.0 aperture of the first lens and a central optical path of the first lens is 0.25˜0.5 times of the central optical path.

An optical module and an electronic device are disclosed. The optical module comprises a beam splitting assembly, a beam combining assembly, a first dimmer assembly and a second dimmer assembly. The beam splitting assembly is configured to divide the incident light into a first light beam and a second light beam that propagate in different directions. The first dimming assembly is located on the light path of the first light beam, and the second dimming assembly is located on the light path of the second light beam. The beam combining assembly is located at the intersection position, so that the first light beam and the second light beam entering the beam combining assembly exit concurrently along the same direction.

An optical system and a head mounted display are disclosed. The optical system comprises: a third lens, a second lens and a first lens arranged successively along a propagation direction of incident light. There are three Fresnel surfaces in the optical system, and two of the Fresnel surfaces are arranged adjacent to each other. The third lens has a positive focal power. A field of view of the optical system is ≥100 degrees. The present disclosure provides a solution of optical structure with short-focus, high light efficiency and large FOV. The optical system according to the present disclosure can be applied in, for example, a head mounted display.

The disclosure provides an optical module and a head mounted display. The optical module includes: a display screen with a size of D 1; a lens group located on a light-emitting side of the display screen; the lens group includes at least one lens; the optical module further includes a polarizing element, a beam splitting element and a phase retarder, wherein the polarizing element and the beam splitting element are provided with the at least one lens of the lens group therebetween, and the phase retarder is located on the light-emitting side of the display screen; wherein a distance from the beam splitting element to the display screen is A 3, which satisfies: 1 < ( D ⁢ 1 / 2 ) / A ⁢ 3 < 9.

The disclosure provides an optical module and a wearable device. The optical module includes a lens group comprising at least a first lens consisting of a cut-edge lens; a lens barrel with an inner cavity, wherein the first lens is movably provided within the inner cavity; a guide slot, provided on a side wall of the lens barrel along an axial direction; a transmission member, through which a periphery of the first lens is slidably matched with the guide slot; a focusing ring, slidably provided on an outer side of the lens barrel; and an inclined slot, provided on a wall of the focusing ring close to the lens barrel, and the transmission member passes through the guide slot and is slidably connected to the inclined slot.

An optical system and a head mounted display are disclosed. The optical system comprises: a third lens, a second lens and a first lens arranged successively along a propagation direction of incident light. There are two adjacent Fresnel surfaces in the optical system, and at least one of the Fresnel surfaces has a curved base. The present disclosure provides a solution of short-focus and lightweight optical structure, in which, compared with a flat base, the use of Fresnel surface having a curved base can improve the imaging quality to a certain extent, and can reduce the total optical length and the total weight of the optical system.

Disclosed are an optical system and an augmented reality device. The optical system comprises sequentially from an object side to an image side: a stop, a lens group, and a display unit; the lens group comprises sequentially from the object side to the image side: a first lens, a second lens, a third lens, and a fourth lens; wherein each of the first lens, the second lens and the fourth lens has positive focal power, and the third lens has negative focal power; wherein the display unit has a maximum imaging circle diameter less than a diameter of the stop.