The invention relates to a tiltable mirror device (1) comprising the components: a tiltable portion (2) comprising a substrate (2.1) having a reflective layer (2.2) for reflecting electromagnetic waves, a fixed portion (3) relative to which the tiltable portion (2) is movable, a bearing assembly (4) mechanically connecting the fixed portion (3) and the tiltable portion (2), wherein the bearing assembly (4) is arranged to render the tiltable portion (2) tiltable around at least one axis of rotation (100) with respect to the fixed portion (3), an actuator assembly, wherein the actuator assembly comprises two components, namely a coil portion (6) comprising one or more coils (6.1, 6.2) each comprising an electric conductor (6.3), and a magnetic assembly (5), wherein one component of the actuator assembly is comprised by the tiltable portion (2), and wherein the other component of the actuator assembly is comprised by the fixed portion (3), wherein the components of the actuator assembly are arranged to move the tiltable portion (2) with respect to the fixed portion (3) by means of a Lorentz force, wherein the actuator assembly is arranged, particularly completely arranged in an actuation space (300) extending away from the reflective layer (2.2) on a single side of the reflective layer (2.2).

A honeycomb sandwich panel having an absolute value of thermal expansion coefficient smaller than an absolute value of thermal expansion coefficient obtained by using carbon fiber reinforced plastic (CFRP) is provided. The honeycomb sandwich panel includes: a first skin being a plate material made of a low expansion metal being a metal having an absolute value of thermal expansion coefficient smaller than an absolute value of thermal expansion coefficient of CFRP; a second skin being a plate material made of the low expansion metal and arranged to face the first skin; and a core made of CFRP or the low expansion metal, being bonded to the first skin and the second skin and including a plurality of tubular cells each having a hexagonal cross section, the tubular cells being formed adjacently to each other.

Method of recovering vision by using a pair of glasses, comprising: dividing a diopter range into multiple diopter intervals with continuous diopter variation; selecting a first diopter interval and a second diopter interval from the multiple diopter intervals according to a user's vision recovery requirement which is lower than the user's actual diopter; selecting a left lens group corresponding to the first diopter interval and a right lens group corresponding to the second diopter interval of the glasses, which both the left lens group and the right lens group include a movable lens and a stationary lens; continuously adjusting the diopter of the glasses to be lower than the user's actual diopter, so that the adjusted diopter of each lens group satisfy the user's vision recovery requirement.

The invention relates to a heliostat sub-assembly and to a method of forming such a sub-assembly. The method of mounting a concave mirror to a supporting structure of a heliostat includes the steps of bonding a plurality of risers at predetermined spaced intervals to a rear face of the mirror, each riser having a bonding pad and a stem extending from the bonding pad, and applying a predetermined concave curvature to the mirror by conforming the front face of the mirror with a convex forming jig or die. The supporting structure and curved mirror are then aligned, and the supporting structure is clinched to the stems of the risers when the curved mirror is conformed with the forming die. The riser stems may be coupled to the bonding pads via multi-axial joint assemblies to enable limited multi-pivotal movement of the stems relative to the bonding pads to facilitate alignment of faces of the stems with the faces of the ribs defined by webs, and relative expansion and contraction of the mirror and supporting structure, the overlap between the riser stems and the webs being sufficient to accommodate clinching with variations in curvature of the glass sheet.

The invention relates to a heliostat sub-assembly and to a method of forming such a sub-assembly. The method of mounting a concave mirror to a supporting structure of a heliostat includes the steps of bonding a plurality of risers at predetermined spaced intervals to a rear face of the mirror, each riser having a bonding pad and a stem extending from the bonding pad, and applying a predetermined concave curvature to the mirror by conforming the front face of the mirror with a convex forming jig or die. The supporting structure and curved mirror are then aligned, and the supporting structure is clinched to the stems of the risers when the curved mirror is conformed with the forming die. The riser stems may be coupled to the bonding pads via multi-axial joint assemblies to enable limited multi-pivotal movement of the stems relative to the bonding pads to facilitate alignment of faces of the stems with the faces of the ribs defined by webs, and relative expansion and contraction of the mirror and supporting structure, the overlap between the riser stems and the webs being sufficient to accommodate clinching with variations in curvature of the glass sheet.

The invention concerns a projection objective of a microlithographic projection exposure apparatus designed for EUV, for imaging an object plane illuminated in operation of the projection exposure apparatus into an image plane. The projection objective has at least one mirror segment arrangement comprising a plurality of separate mirror segments. Associated with the mirror segments of the same mirror segment arrangement are partial beam paths which are different from each other and which respectively provide for imaging of the object plane (OP) into the image plane (IP). The partial beam paths are superposed in the image plane (IP). At least two partial beams which are superposed in the same point in the image plane (IP) were reflected by different mirror segments of the same mirror segment arrangement.

The invention concerns a projection objective of a microlithographic projection exposure apparatus designed for EUV, for imaging an object plane illuminated in operation of the projection exposure apparatus into an image plane. The projection objective has at least one mirror segment arrangement comprising a plurality of separate mirror segments. Associated with the mirror segments of the same mirror segment arrangement are partial beam paths which are different from each other and which respectively provide for imaging of the object plane (OP) into the image plane (IP). The partial beam paths are superposed in the image plane (IP). At least two partial beams which are superposed in the same point in the image plane (IP) were reflected by different mirror segments of the same mirror segment arrangement.

A rearview mirror includes a mirror frame and a mirror mount. The end of the mirror frame, which is connected to the mirror mount, is formed with a through hole. The mirror mount has an upper mount, a clamp and a lower mount. The upper mount is pivotedly connected to the mirror frame and has a ball joint. The ball joint is received in the clamp. The lower mount has a receiving hole for being inserted by the clamp.

Kinematic mounts are used frequently to hold objects such as mirrors, lenses, and other optical equipment. To adjust kinematic mounts, adjustment mechanisms are often required. Adjustment mechanisms can be used to make fine adjustments in applications where precision is required (e.g., laser system prototyping). Kinematic mounts that include never-before implemented form factors and structural elements require new adjustment solutions. This application describes systems that include both novel kinematic mounts as well as new adjustment mechanisms developed to reorient the new kinematic mounts. Adjustment mechanisms described in this application include a main body, a control frame, and control screws to adjust the orientation of the control frame. The control frame is coupled with a kinematic mount's housing, which rotates about a center of curvature of a bottom surface of the housing.

Kinematic mounts are used frequently to hold objects such as mirrors, lenses, and other optical equipment. To adjust kinematic mounts, adjustment mechanisms are often required. Adjustment mechanisms can be used to make fine adjustments in applications where precision is required (e.g., laser system prototyping). Kinematic mounts that include never-before implemented form factors and structural elements require new adjustment solutions. This application describes systems that include both novel kinematic mounts as well as new adjustment mechanisms developed to reorient the new kinematic mounts. Adjustment mechanisms described in this application include a main body, a control frame, and control screws to adjust the orientation of the control frame. The control frame is coupled with a kinematic mount's housing, which rotates about a center of curvature of a bottom surface of the housing.