An observation system includes: an observation device that includes an eyepiece lens and an objective and forms a real image of a sample on an optical path between the eyepiece lens and the objective; and an observation auxiliary device that is worn by a user and outputs auxiliary information to the user, the observation auxiliary device superimposing the auxiliary information on a virtual image of the sample to be observed by the user through the eyepiece lens on the basis of a relative position of the observation auxiliary device with respect to the observation device.

Techniques are described for applying an edge sealant to the edge of a multi-layer optical device. In particular, embodiments provide an apparatus that performs a precision measurement of the perimeter of an eyepiece, applying the edge sealant (e.g., polymer) based on the precision-measured perimeter, and subsequently cures the edge sealant, using ultraviolet (UV) light that is directed at the edge sealant. The curing process may be performed within a short time following the application of the edge sealant, to ensure that any wicking of the edge sealant between the layers of the eyepiece is controlled to be no greater than a particular depth tolerance. In some examples, the edge sealant is applied to the optical device prevent, or at least reduce, the leakage of light from the optical device, and also to ensure and maintain the structure of the multi-layer optical device.

A display apparatus of the present disclosure includes an eyepiece optical device and an image display device, the image display device includes an image forming device, a transfer optical device, a control unit, a first position detection device, a second position detection device, and a transfer-optical-device control device, the eyepiece optical device forms an image from the transfer optical device on a retina of an observer, the transfer-optical-device control device controls the transfer optical device such that the image incident from the image forming device reaches the eyepiece optical device under the control of the control unit on the basis of position information of the eyepiece optical device detected by the first position detection device, and the control unit corrects a position detected by the first position detection device on the basis of position information of the eyepiece optical device detected by the second position detection device.

The present invention relates to a reflective eyepiece optical system and a head-mounted near-to-eye display device. The system includes: a first optical element and a second optical element arranged successively along an incident direction of an optical axis of the human eye, and a first lens group located on an optical axis of an miniature image displayer. The first optical element reflects the image light refracted by the first lens group to the second optical element, and then transmits the image light reflected by the second optical element to the human eye. The effective focal lengths of the first sub-lens group, the second sub-lens group and the third sub-lens group are a combination of positive, negative and positive. The optical path is effectively folded, the overall size of the optical system is reduced, aberrations are largely eliminated, and a visual experience effect of high liveness is achieved.

Disclosed are a short-distance optical amplification module, method and system. The module comprises a reflective type polarizing plate, a first phase delay plate, an imaging lens, a second phase delay plate and an absorptive type polarizing plate, arranged successively. The reflective type polarizing plate is arranged on a transmission path of an optical image. The first phase delay plate is arranged on the transmission path of the optical image passing through the reflective delay plate. The imaging lens is arranged on the transmission path of the optical image. The second phase delay plate is configured for converting a polarization direction of the optical image from an elliptical or circular polarization direction to a second linear polarization direction. The absorptive type polarizing plate is arranged on one side of the second phase delay plate that faces away from the imaging lens.

The invention relates to a plenoptic ocular device intended to be coupled in an ocular port of an optical instrument configured to generate a real image of a sample on a focal plane situated in a region close to said ocular port, said plenoptic ocular device being configured to capture said real image, generate a set of elemental images and send them to recording means with spatial discretisation which in turn comprises communication means configured to transmit the set of elemental images to external image processing means.

A compact dot sight is provided, in which the inner cylinder is eliminated and no structure protrudes from the left and right side walls of a lens barrel. The dot sight includes: a lens barrel; objective lenses fixed to a front opening of the lens barrel; an eyepiece lens fixed to a rear opening of the lens barrel; a light source for projecting a point image from an inside of the lens barrel to the objective lens; a power supply circuit for supplying power to the light source; and a dot adjustment mechanism that has a holder of the light source and can adjust the position of the point image projected on the objective lens by moving the holder vertically and horizontally.

An eyepiece for use in front of an eye of a viewer includes a waveguide configured to propagate light therein, and a diffractive optical element optically coupled to the waveguide. The diffractive optical element includes a plurality of first ridges protruding from a surface of the waveguide. Each of the plurality of first ridges has a first height and a first width. The diffractive optical element further includes a plurality of second ridges. Each of the plurality of second ridges protrudes from a respective first ridge and has a second height greater than the first height and a second width less than the first width. The diffractive optical element is configured to diffract a portion of a light beam incident on the diffractive optical element toward the eye as a first order transmission.

An optical system for displaying an image to a viewer includes a partial reflector, a reflective polarizer, and a first retarder layer. A light ray propagates along the optical axis and passes through the plurality of optical lenses, the partial reflector, the reflective polarizer, and the first retarder layer without being substantially refracted. For a cone of light incident on the optical system from an object comprising a spatial frequency of about 70, 60, 50, 40, or 30 line pairs per millimeter and filling the exit pupil with a chief ray of the cone of light passing through a center of the opening of the exit pupil of the optical system and making an angle of about 20 degrees with the optical axis, a modulation transfer function of the optical system is greater than about 0.2.

A method of fabricating an optical assembly includes providing a first mold having a first curved mold surface; placing a substantially flat reflective polarizer; on the first curved mold surface and applying at least one of pressure and heat to at least partially conform the reflective polarizer to the first curved mold surface; providing a second mold comprising a second mold surface, the first and second mold surfaces defining a mold cavity therebetween; substantially filling the mold cavity with a flowable material having a temperature greater than a glass transition temperature of the reflective polarizer; and solidifying the flowable material to form a solid optical element bonded to the reflective polarizer. A maximum variation of an orientation of a pass polarization state across the bonded reflective polarizer is within about 3 degrees of a maximum variation of the orientation of the pass polarization state across the substantially flat reflective polarizer.