12 results about "Eye relief" patented technology

A headset includes an optical assembly, an adjustment assembly, and a measurement component. The measurement component is configured to measure an interpupillary distance provided by an adjustment assembly in a first direction and an eye relief distance provided by the adjustment assembly in a second direction, where the first direction is orthogonal to the second direction. The measurement component includes a first rheostat configured to measure the interpupillary distance and a second rheostat configured to measure the eye relief distance, wherein the second rheostat is placed parallel to the first rheostat. The measurement component further includes a linkage configured to translate a motion of the adjustment assembly in the second direction to the first direction.

The utility model discloses a telescope optical system with a long exit pupil distance, which is characterized in that a first objective lens, a second objective lens, a focusing lens, a semi-pentaprism, a roof prism, a first eyepiece lens, a second eyepiece lens, a third eyepiece lens and a fourth eyepiece lens are sequentially arranged from an object side to an image side along the direction of an optical axis, the first objective lens is a biconvex lens, the second objective lens is a biconcave lens, the first objective lens and the second objective lens form a balsaming lens, the focusing lens is a concave-convex lens, the convex surface faces the object side, the first ocular lens is a biconcave lens, the second ocular lens is a biconvex lens, and the focusing lens is a concave-convex lens. The first eyepiece lens and the second eyepiece lens form a balsaming lens, the third eyepiece lens is a biconvex lens, the fourth eyepiece lens is a concave-convex lens, and the convex surface faces the object side.

A head-mounted device may be provided with displays. The displays and lenses through which images on the displays are viewed may be mounted in optical modules. Lens positioners may be used to move the optical modules toward and away from eye boxes to adjust eye relief distance. Control circuitry may gather sensor data such as motion sensor data from a motion sensor indicating whether the head-mounted device is in free fall and / or image sensor data from a front-facing camera indicating whether the head-mounted device is headed toward a collision with an external surface. The control circuitry may use the lens positioners to automatically increase the eye relief distance in response to sensor data if a collision is predicted. The lens positioners may include solenoids or other actuators. The positions of the lenses may be adjusted without necessarily adjusting a distance between the lens and the display.

The invention relates to a long-exit-pupil-distance long-wave infrared zoom projection optical system and an infrared target simulator, belongs to the technical field of optical devices, and solves the problem that an existing zoom projection system is short in exit pupil distance. The working wave band of the system is 8-12, an inverted structure with a preposed diaphragm is adopted, the system comprises a first fixed lens group, a zoom lens group, a compensating lens group and a second fixed lens group which are sequentially arranged along an optical axis, and the focal powers are respectively positive focal power, negative focal power, positive focal power and positive focal power; the first fixed lens group and the second fixed lens group are fixed on the optical axis, and the zoom lens group and the compensating lens group reciprocate along the direction of the optical axis so as to realize switching between a short focus of 86.67 mm and a long focus of 260 mm. The long-wave infrared target simulator has a long exit pupil distance, can realize far-field projection of a long-wave infrared target while stabilizing zooming, and avoids interference between the infrared target simulator and a long-wave infrared system to be measured.

The present application relates to a kind of long pupil distance long-wave infrared zoom projection optical system and infrared target simulator, belong to optical device technical field, solve the short pupil distance of existing zoom projection system exists Problem.The working waveband of the system of the present application is 8~12, it adopts the inverted structure of diaphragm front, including the first fixed lens group, variable magnification lens group, compensation lens group, second fixed lens group being sequentially arranged along optical axis, optical power is respectively positive power, negative power, positive power, positive power;First fixed lens group and second fixed lens group are fixed in position on optical axis, variable magnification lens group, compensation lens group reciprocating moves along the direction of optical axis to realize the switching between short focus-86.67mm and long focus-260mm.The present application has long pupil distance, can realize the far field projection to long-wave infrared target while stabilizing zoom, avoid the interference between infrared target simulator and long-wave infrared system to be measured.

The application discloses a kind of based on mobile terminal's eye visual parameter adaptation guide method and system, the method includes: obtaining user basic information;Based on log visual acuity table is combined with mobile terminal screen pixel density and observation distance to construct visual target test table, according to the user basic information is combined with visual target test table, and visual target serial number is matched for user;According to the visual target serial number, calculate visual target line sequence change value, based on the preset multi-grade threshold interval is matched to the visual target line sequence change value, and parameter classification adaptation result is generated;Based on the parameter classification adaptation result is recommended personalized eye relief adjustment scheme for user.The method and system provided by the application can realize long-term, convenient and personalized visual parameter adaptation guide.

The present application relates to the long pupil distance mid-wave infrared zoom projection optical system and infrared target simulator, belong to optical device technical field, solve the short pupil distance problem existing in the present zoom projection system, the working wave band of the system is 3~5, it adopts the inverted structure of diaphragm front, including first fixed lens group, zoom lens group, compensation lens group, second fixed lens group arranged in sequence along the optical axis, the optical power is positive optical power, negative optical power, positive optical power, positive optical power respectively;The first fixed lens group and the second fixed lens group are fixed in position on the optical axis, the zoom lens group and the compensation lens group reciprocatingly move along the optical axis direction to realize the switching between short focus-130mm and long focus-260mm.The projection optical system of the present application has long pupil distance, can realize the far field projection to the infrared target while stabilizing zoom, avoid the interference between the simulator and the equipment to be tested, improve the test precision.

The invention relates to a long-exit-pupil-distance medium-wave infrared zoom projection optical system and an infrared target simulator, belongs to the technical field of optical devices, and solves the problem that an existing zoom projection system is short in exit pupil distance. The working wave band of the system is 3-5, an inverted structure with a preposed diaphragm is adopted, the system comprises a first fixed lens group, a zoom lens group, a compensating lens group and a second fixed lens group which are sequentially arranged along an optical axis, and the focal powers are respectively positive focal power, negative focal power, positive focal power and positive focal power; the first fixed lens group and the second fixed lens group are fixed on the optical axis, and the zoom lens group and the compensating lens group reciprocate along the direction of the optical axis so as to realize switching between a short focus of 130 mm and a long focus of 260 mm. The projection optical system has a long exit pupil distance, can realize far-field projection of an infrared target while stabilizing zooming, avoids interference between a simulator and to-be-tested equipment, and improves test precision.

This utility model discloses a glass-plastic hybrid eyepiece with a long exit pupil distance and its optical system. The optical system includes an aperture stop, a first lens, a second lens, a third lens, and a fourth lens arranged sequentially from the image side to the object side. The second lens and the third lens form a cemented doublet lens. The first lens and the cemented doublet lens are glass lenses, and the fourth lens is a plastic lens. The eyepiece has a simple and lightweight structure and is easy to assemble and use.

Aspects of the present disclosure are directed to an adjustment mechanism for adjusting an eye-to-lens distance of a headset display device. The adjustment mechanism can include an adjustment wheel that is rotatable by a user, a pinion gear fixed to a screw, and a threaded member receiving the screw and mounted to a forehead pad frame supporting a forehead pad. The adjustment wheel can include an internal bevel gear ring. The pinion gear is rotated by rotation of the internal bevel gear ring, and the screw rotates with the pinion gear. The pinion gear and the screw can rotate about a second axis. The threaded member moves along the screw, as the screw rotates, to move the forehead pad to adjust the eye-to-lens distance. The internal bevel gear ring, the pinion gear, and the screw are configured to allow additional components to pass through an interior of the adjustment wheel.

A head-mounted device may include optical assemblies for presenting images to a user. Each optical assembly may have a support with first and second portions that move relative to each other. A motor in each optical assembly may move the second portion of that optical assembly relative to the first portion of that optical assembly. The optical assemblies may each have guide rods along which the second portion of the optical assembly slides relative to the first portion. A lens in each optical assembly may be used to convey an image from a display in the optical assembly to an eye box for viewing by a user. The lens and display may be mounted to the second portion. Face bumpers may be mounted to the first portion. To adjust eye relief, the motor of each optical assembly may move the second portion relative to the first portion.