52 results about "Eye relief" patented technology

The invention relates to an eyepiece, in particular to an eyepiece used in a head-mounted display, belonging to the field of optical technique. The eyepiece is formed by six pieces of lenses, and a lens screen, the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are sequentially arranged from the observing side of human eyes and the display device side along the direction of an optic axis in a coaxial way; the exit pupil diameter of the eyepiece is larger than that of the common eyepiece, the eye relief is long, the angle of view field is large, and the focal distance and F/# are small; furthermore, illuminance of image plane is evener, so that the eyepiece especially meets the requirements of the head-mounted display.

A removable optical sight mount adapted for use with a military-style rifle such as an M1A provides a centrally aligned support projecting well to the rear for use with sights having very limited eye relief. The removable sight advantageously uses a three point lock up or attachment to the rifle, the three points being (1) an elongated longitudinal tenon engaging a groove on the left side of the rifle secured with a fastener and cammed into tight engagement with the groove, (2) a transverse rear guide block, and (3) an adjustable front set screw that, when tightened, bears on the rifle receiver's crown.

A mount for monocular enhanced night vision goggles having an ocular preference adjustment, an interpupillary adjustment, an eye relief adjustment, a tilt adjustment, a vertical adjustment, a quick stowage feature and a flip-up stowage feature is disclosed. An apparatus in accordance with the present invention has a housing secured to headgear. A vertical block is slidably coupled to the housing allowing it to translate vertically. A chassis is rotatably coupled to the vertical block allowing it to rotate between an in-use and flip-up position. A monorail is rotatably coupled to the chassis allowing it to rotate between an in-use and a quick stowage position. A carriage is slidably coupled to the monorail allowing for an eye relief adjustment. Enhanced night vision goggles are attached to a socket assembly which is movably coupled to the carriage allowing relocation in front of either eye while facing the same direction.

Provided is a compact display system and method for creating, with minimal volume, a focused, high quality, full color, large FOV virtual image characterized by eye-limited spatial resolution. The provided compact display (i) enables a flexible range of eye relief, and (ii) enables a large exit pupil.

A quick adjustment assembly for a head or helmet mounted display. The quick adjustment assembly includes an adjustment plate assembly securely attachable to the head of a user via a helmet or head gear. An eye relief assembly is mountable on the adjustment plate assembly. The eye relief assembly includes a main frame for supporting at least one image source assembly (ISA). A pair of opposing pressure plate assemblies are supported by the main frame. Each pressure plate assembly includes an eye relief adjustment release element engageable by the user; and at least one pressure plate friction pad assembly operatively engageable with the adjustment plate assembly. The pressure plate friction pad assembly provides selectable positioning of the eye relief assembly along a plane of movement relative to the adjustment plate assembly allowing three-degrees of freedom movement along the plane of movement. The eye relief assembly preferably includes an interpupillary (IPD) adjustment assembly securely mounted thereon.

Disclosed is an optical scope including an objective lens, an eyepiece lens, and a reticle, wherein a field lens having negative power is disposed in at least one of a front and a back of the reticle disposed on an image formation surface of the objective lens to increase eye-relief.

Implementations of a modular scope mount assembly are provided. In some implementations, the modular scope mount assembly may be used to secure a telescopic sight to a firearm (e.g., a rifle and/or a carbine). In some implementations, the modular scope mount assembly may be used to co-mount a telescopic sight and a reflex sight to a firearm. In some implementations, the modular scope mount assembly may be configured to place a reflex sight on the right side and/or left side of a co-mounted telescopic sight. In some implementations, the modular scope mount assembly may be configured to allow a user to change (increase or decrease) the eye relief between the user and the co-mounted reflex sight(s).

In order to obtain an observation optical system which has high optical performance while having a wide field of view, and can easily reduce variation of aberration at the time when an eye relief has changed, the present invention provides an observation optical system which is used for an observer to observe an image displayed on an image display surface, and includes in order from an observation side to an image displaying surface side: a first lens having a positive refractive power; a second lens having a negative refractive power; and a third lens having a positive refractive power, wherein a focal length f1 of the first lens, a focal length f2 of the second lens and a focal length f3 of the third lens are each appropriately set so as to satisfy the conditional expression of:

An optical viewing apparatus may include an objective lens assembly and an one eye piece assembly connected to the objective lens assembly. The optical viewing apparatus may exhibit a field of view in the range of between 40° and, preferably beyond 80°, and an eye-relief of at least 15 mm, and the optical viewing apparatus may exhibit a foveated image for at least one field of view (FOV) wherein the optical on-axis resolution decays toward the periphery of the field of view.

An optical assembly uses a plastic prism with one flat surface and a collimating lens optic to provide the capability of imaging a color micro-display to the eye. The collimating optic and flat prism surface can allow for aberration-free diopter adjustment and an image with very low-magnitude, nearly-symmetric distortion. The collimating optic can also provide environmental protection of the prism involving an optical plastic device. The input illumination from the micro-display enters the prism, is reflected two times within the prism, exits the prism, and passes through the collimating optic before being viewed by the eye. Such an optical assembly can provide a field of view with eye-relief and exit pupil when viewing a full-color micro-display.

An eyepiece system comprising, in order from the object side, a first lens unit having a negative refractive power and a second lens unit having a positive refractive power, and configured to locate an intermediate image formed by an objective lens system between the first lens unit and the second lens unit: the first lens unit being a negative lens unit having an object side surface which is convex toward the object side. This eyepiece system has a wide visual field and a long eye relief, and corrects aberrations favorably even at marginal portions of the visual field.

An eyepiece lens system using an aspherical lens can be formed at a low cost, having an eye relief equivalent to 80% or more of the focal length of the entire eyepiece lens system, with aberrations satisfactorily corrected up to the circumference of the field of view, as well as a telescope, a binocular and a microscope. The eyepiece lens system comprises a cemented lens and a positive lens, and at least one of the lens surfaces is formed aspherical. The aspherical surface is a hybrid type spherical surface formed by applying a synthetic resin layer on a basic spherical surface made of glass. There are also provided a telescope, a binocular and a microscope employing such eyepiece lens system.

An eyepiece lens assembly including a collecting lens, glass spherical cemented doublet, a plastic singlet, and a glass spherical singlet. The assembly provides over 30 degrees extended field of view, a greater than 30 mm eye relief, under 5% distortion, a substantially telecentric focal plane, and weighing under 6 ounces.

An apparatus that is wearable by a solo video camera man that allows for solo focusing of subjects without the need for a “focus follow” The device allows for one operator to work the camera and focus it without touching the lens through one hand operation of the lens. There is silent operation for sound recording while filming. The device is modifiable for left hand or right hand use. The device is foldable for portability. The device provides a stable platform for portable camera operation. There is adjustable focus tension for micro control and operator preference. There is an add-on surround frame to support sound and lighting equipment that moves with the camera and that can also house a monitor. The system includes a vest and adjustable support strut that makes hands-free use fatigue-free between scenes. A scale linked to the lens focus makes pre-set focus points easy to mark and visually reference by the single operator. The unit can be tripod mounted for stationary filming. The fold down back stop is adjustable in and back along the shoulder support bars to provide repeatable eye relief to camera or affixed monitor. The back stop and shoulder supports provide a gripping, tacky surface for stability. There is a direct mechanical link between the control handle and the lens focus and no cables or gears with backlash or slippage.

A day/night weapon sight assembly that consists of daytime sight and a nighttime sight allows the use of both sights without change in eye relief even when the nighttime sight is attached to the rear end of the daytime sight. This is achieved by supporting the daytime sight moveably in the direction of the optical axis and by supporting the nighttime sight with the use of a plane-parallel motion mechanism that allows switching of the nighttime sight between the upper inoperative position and the operative position behind and coaxially with the daytime sight.”

An optical magnifier is provided. One general form of one example embodiment includes two lens elements, at least two aspheric surfaces, and at least one diffractive surface. Another general form of another example embodiment includes three lens elements, and at least three aspheric surfaces. At least two of the aspheric surfaces can be simple conics. The optical magnifier, suitable for use in an electronic display system, has an apparent field of view of at least +/−10 degrees; a magnification of at least 15×; a back focal length of at least 5 mm; and an eye relief greater than the effective focal length of the optical magnifier. The lens elements can be made from plastic.

A scope and mount block assembly for a rifle includes a scope having sets of spaced apart ribs for seating into complementary arcuate grooves in scope mount components. An underside keyseat in the scope aligns with a complementary keyseat in a scope mount block, and a key residing in the combined volume of both keyseat enforces this alignment. The scope mount blocks clamp to any standard rail such as a Picatinny rail. When the scope is removed, leaving the blocks in place, it can be reattached so that the key reestablishes its alignment to the rifle and no re-sighting of the scope is required. Also, careful selection of pitches for the scope ribs and for spaced apart features for engagement of the mount blocks to a mounting rail can offer much finer incremental location of the scope on the rifle for more precise adjustment of eye relief.

provided is an image display device that can reduce deterioration in image quality in a peripheral portion of an eyepiece optical system, includes an eyepiece optical system having a polarization element and guiding light from an image display element toward eyeballs of an observer, in which the eyepiece optical system includes a first lens for determining an emission angle from the image display element, and a surface of the first lens on the image display element side has an aspherical shape having a convex shape in a region including an optical axis of the first lens, wherein the aspherical shape has an inflection point within an optically effective region in a cross section including the optical axis, and wherein an eye relief E of the eyepiece optical system satisfies 15 mm≤E≤25 mm.

An image display apparatus forms illumination light from a light source into image light by using a reflective display device, and directs the image light through an eyepiece optical system to an eye to present a virtual image of the image carried by the image light. To realize an image display apparatus of this type that is compact, affords a sufficiently long eye relief, and offers wide-field, high-quality images, a combiner for making the optical path of the illumination light from the light source overlap with that of the image light is disposed inside the eyepiece optical system, a positive lens is provided in the rear potion of the eyepiece optical system between the display device and the combiner, a concave reflective surface is provided in the front portion of the eyepiece optical system between the combiner and the observation point, and the eyepiece optical system is designed to be overtelecentric as a whole.

The invention discloses an augmented reality projection system, and head-mounted display equipment. The augmented reality projection system comprises a display module, a waveguide structure, and a diaphragm, wherein the display module is used for display imaging, and emits imaging beams for the display imaging; the imaging beams are emitted by the display module to the waveguide structure, and areprovided with a non-pupil dilation direction and a pupil dilation direction when transmitted inside the waveguide structure; the diaphragm is arranged on a light path from the display module to the waveguide structure, used to limit exit pupil positions of the imaging beams in the non-pupil dilation direction, and provided with a first opening size in the non-pupil dilation direction; and the first opening size can be adjusted in the non-pupil dilation direction so that the exit pupil positions coincide with eye relief positions. The augmented reality projection system and the head-mounted display equipment provided by the invention have the advantages that field loss or an excessively large exit pupil diameter in a one-dimensional pupil dilation waveguide system can be effectively avoided, and high imaging quality of the overall system is guaranteed.