A precision adjustment screw mechanism comprises a platform carried by a base. The platform is selectively movable towards and away from the base, and is selectively tiltable with respect to the base. A push-pull screw is secured to and between the platform and the base, to selectively displace the platform towards and away from the base. The push-pull screw has a ball-and-socket type joint between the platform and the base, with the platform tiltable with respect to the base about the ball-and-socket type joint. A cylindrical bellows has a proximal end sealed to the base and a distal end sealed to the platform, and circumscribes the push-pull screw between the base and the platform. The bellows can react torque exerted on the platform by a fastener of the push-pull screw.

One embodiment of a mirror or reflective surface is set onto a ridged material. The mirror or reflective surface is set at a precise angle by support legs that inserted into holes in the ridged material. The support legs can also be placed in storage notches in ridged material.

The disclosure provides a positioning unit for an optical element in a microlithographic projection exposure installation having a first connecting area for connection to the optical element, and having a second connecting area for connection to an object in the vicinity of the optical element.

A fly's eye mirror including first and second complementary MN arrays, each including a plurality of faceted reflective surfaces arranged along both the first and the second axes. When assembled, the two complementary arrays are integrated together and mounted onto a common base plate. With the increased lineal length of each array along both axes, the faceted reflective surfaces of each array are in rotational or tilt alignment with a base plate along both axes.

A mirror assembly is provided for producing beam bundles from the beam of a light source, wherein the beam bundles includes a first beam bundle having a first main beam direction, a second beam bundle having a second main beam direction, and preferably further beam bundles having further main beam directions. The assembly includes a first mirror segment having a first focal point, which converts a first partial region of the beam of the light source into the first beam bundle, a second mirror segment having a second focal point, which converts a second partial region of the beam of the light source into the second beam bundle, and preferably further mirror segments having further focal points, which convert further partial regions of the beam of the light source into further beam bundles. The back side of the mirror segments have a curvature which is concentric to the light source.

A monolithic optical device for light manipulation and control at visible wavelengths includes a device layer deposited on an sacrificial layer deposited on a reflective substrate. The device layer comprises an elastic support structure and nanoscale optical antenna elements, arranged such that the nanoscale optical antenna elements are capable of moving vertically in response to application of an electrostatic potential between the device layer and the reflective substrate. The sacrificial layer joins the elastic support structure to the reflective substrate. The reflective substrate is reflective at optical wavelengths.

A head mounted display device includes a structural frame arranged generally along a X-axis and a Y-axis for viewing along a Z-axis, the X, Y, and Z axes being mutually perpendicular. A micro-display is coupled to the structural frame, and configured to project visual content in a substantially forward direction along the Z-axis away from a user. A group of one or more optical elements with reflective optical surfaces is coupled to the structural frame and respectively positioned on a front side of the micro-display to reflectively guide a light ray bundle in a non-pupil forming optical path from the micro-display to a user's eye to provide an image to the user's eye such that the light rays of the light ray bundle entering the user's eye are essentially parallel to make the image visible to the user with varied positions of the user's pupil.

An optical mount includes a support substrate defining an aperture configured to receive an optical element. A support assembly is positioned proximate a perimeter of the aperture. The support assembly includes a resilient member configured reflects in response to relative motion between the optical element and the support substrate. A support plate is positioned on the resilient member and is in contact with the optical element.

An electronic device and a method for photographing an image in a multi-direction is provided. The electronic device includes a case, including a display, an image sensor, and a processor, and a crown disposed on the case, the crown including a camera window. The crown is rotatable and when the crown is rotated, the camera window is rotated, and light passing through the camera window is transmitted to the image sensor.

An adjustable mounting arrangement to position an object of an optical reflecting telescope relative to a base includes at least two support structures connected to the base and to the object. Each of the at least two support structures has two four-link beams arranged nonparallel to each other and a cradle having two connecting links. Each of the two four-link beams has a first strut and a second strut running nonparallel to each other, where each of the first and second struts have a first end and a second end, respectively, and where each of the first and second struts is mounted with articulation via their respective first end in a corresponding inner joint on the object. The first strut and the second struts are equipped on each of their second ends with a corresponding outer joint, where the outer joints of the two four-link beams are connected to each other via the connecting links such that a distance between the outer joints is less than a distance between the inner joints, and a first and a second joint axis of each four-link beam lie in or at an angle to a plane defined by a corresponding one of the two four-link beams. A third and a fourth joint axis of each four-link beam lie in the plane is defined by a corresponding one of the two four-link beams. Each of the at least two support structures forms a three-dimensional multi-articulated structure comprising the two four-link beams coupled to each other, and each of the two four-link beams is offset to an inner side in relation to a straight line connecting the outer joints, where each of the connecting links is configured with a bearing surface of a support bearing. Finally, each of the at least two support structures is mounted with articulation relative to the base by the support bearing.