A head mounted display, including at least one display, an image capture device, a light beam generator, and an optical compensation element, is provided. The display has an open area and generates at least one image light beam. The image capture device is disposed by overlapping with the display corresponding to the open area. The image capture device is configured to capture a target area image through the open area. The light beam generator is configured to project at least one light beam to a target area. The target area reflects the light beam to generate at least one reflection light beam. The optical compensation element is configured to convert a transmission direction of the image light beam and enable the reflection light beam to be directly transmitted to the image capture device.

The present invention provides a concave diffraction grating capable of improved diffraction efficiency by suppressing spherical aberration. The concave diffraction grating is a concave diffraction grating 2 for dispersing and focusing light and comprises sawtooth grating grooves 21 on a concave substrate 24, with the sawtooth grating grooves 21 being unequally spaced. The concave diffraction grating 2 for dispersing and focusing light is formed by preparing a planar diffraction grating with a sawtooth shape which is formed on a planar substrate by photo-lithography and etching or machining and which forms unequally spaced grating grooves 21, deforming and mounting the planar diffraction grating along a fixed convex substrate to obtain a mold of a concave diffraction grating, and transferring the mold of the concave diffraction grating to the surface of a metal or a resin.

A compensation apparatus of a display panel and a display panel. The compensation apparatus is used for performing optical compensation on a display panel to be compensated. The display panel to be compensated includes a bent region. The compensation apparatus of a display panel includes a light collimation module and an optical compensation module. The light collimation module is disposed on a light exiting side of the bent region and between the display panel to be compensated and the optical compensation module and is configured to adjust transmission directions of light beams constituting a first display image, so that the adjusted light beams are in parallel in pairs. The first display image is an image displayed in the bent region. The optical compensation module is configured to collect the first display image and perform optical compensation on the first display image.

The zoom lens consists of, in order from the object side, a first lens group that has a negative refractive power; a second lens group that has a positive refractive power; a third lens group that has a negative refractive power; and a fourth lens group that has a positive refractive power. During zooming, in each lens group, distances between the adjacent groups in the direction of the optical axis are changed. The first lens group consists of, in order from the object side, a first lens having a negative refractive power, a second lens having a negative refractive power, and a third lens having a positive refractive power. The third lens group consists of a negative lens. During focusing, only the third lens group moves along the optical axis. The zoom lens satisfies predetermined conditional expressions.

An optical processor is presented for applying optical processing to a light field passing through a predetermined imaging lens unit. The optical processor comprises a pattern in the form of spaced apart regions of different optical properties. The pattern is configured to define a phase coder, and a dispersion profile coder. The phase coder affects profiles of Through Focus Modulation Transfer Function (TFMTF) for different wavelength components of the light field in accordance with a predetermined profile of an extended depth of focusing to be obtained by the imaging lens unit. The dispersion profile coder is to configured in accordance with the imaging lens unit and the predetermined profile of the extended depth of focusing to provide a predetermined overlapping between said TFMTF profiles within said predetermined profile of the extended depth of focusing.

A cured product contains a dispersant, inorganic particles, and a resin that is a product of polymerization or copolymerization of a curable resin. The dispersant contains a compound represented by a formula R—X, wherein R represents a group having an acryloyloxy group or a methacryloyloxy group at an end of the molecule thereof, and X represents a carboxy group. The dispersant content is 10 parts by volume to 20 parts by volume relative to 100 parts by volume of the cured product. The curable resin contains at least one monomer having an N number of polymerizable reactive group, wherein N represents an integer of 2 or more. The proportion of the at least one monomer is 25 parts by volume to 76 parts by volume relative to 100 parts by volume of the cured product.

An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens sequentially disposed from an object side. The third lens and the sixth lens have positive refractive power, and an f-number (F No.) of the optical imaging system is 1.7 or less.

Provided herein are systems and methods for multi-color imaging using a microscope system. The microscope system can have a relatively small size compared to an average microscope system. The microscope system can comprise various components configured to reduce or eliminate image artifacts such as chromatic aberrations and/or noise from stray light that can occur during multi-color imaging. The components can be configured to reduce or eliminate the image artifacts, and/or noise without substantially changing the size of the microscope system.

Various embodiments disclosed herein include optical aberration control for a camera system. Such a camera system may implement optical aberration control, e.g., by combining one or more variable focus devices with one or more actuators (e.g., a voice coil motor actuator) for moving a lens stack of the camera system to provide autofocus (AF) and/or optical image stabilization (OIS) functionality. A variable focus device may have variable optical power to achieve AF, OIS, and/or introduce optical aberrations such as spherical aberration. In some implementations, the variable focus device may be driven to introduce optical aberrations, and the actuator for moving the lens stack may be driven to compensate for the optical power from the variable focus device.

This application uses an image detector to mitigate field curvature but without the need to curve the detector surface. Gradient-index (GRIN) media, which possesses spatially varying refractive index, is used as “cover piece” for planar detectors or internal images. Field curvature correction can be made at the detector or internal image using plane-parallel GRIN cover piece with a planar detector or an internal image. GRIN cover piece imparts a transversely varying image shift. In doing so, the number of elements in an optical system may be reduced since field curvature can be corrected at the detector, allowing for smaller and more lightweight systems.