Abstract: Provided is a supporting element having an object-side mechanical surface, an image-side mechanical surface, an inner-side connecting surface having a first and a second plane inner walls extending from at least one of the object-side and the image-side mechanical surfaces, and an outer-side connecting surface having a first and a second outer cutting surfaces respectively adjacent to the first and the second plane inner walls. The supporting element satisfies the following conditional expression. 4?R/SD?30. R represents half of a distance between the first and the second outer cutting surfaces. SD represents a smaller one of a first and a second distances, the former being the minimum distance between the first outer cutting surface and the first plane inner wall, the latter being the minimum distance between the second outer cutting surface and the second plane inner wall. A portable optical imaging lens is also provided.

Abstract: An apparatus for projecting content displayed on a display, the apparatus may include a first array of first microlenses that comprise multiple first microlenses; a second array of second microlenses that is spaced apart from the first array of microlenses and comprises multiple second microlenses; wherein a width of each first microlens and each second microlens is smaller than a few times a pixel pitch of the display; wherein the second array of second microlenses is located at a conjugate plane of the display; wherein a focal plane of each second microlenses is located at a corresponding first microlens; wherein the apparatus is configured to project different images of the display that are located at different distances from the display; wherein each image of the display comprises multiple image segments; wherein an optical path of each image segment passes through a dedicated pair of a second microlens and a corresponding first microlens.

Abstract: Provided is an optical element including: a main body which is formed of a medium capable of transmitting first light and second light having a wavelength longer than that of the first light, in which the main body includes an incident region into which the first light and the second light are incident, in which a gap which is inclined with respect to the incident region and in which a medium having a refractive index with respect to the first light and the second light lower than that of the main body is disposed is provided inside the main body, and in which a gap width from an interface bordering the main body and the gap is larger than a penetration length of an evanescent wave of the first light at the interface and is smaller than a penetration length of an evanescent wave of the second light at the interface.

Abstract: A lens apparatus that can secure a necessary lens moving distance while avoiding growing in size and that is able to firmly hold a lens. The lens apparatus comprises a first lens group holding member, a second lens group holding member, an exterior cylinder disposed on an outer peripheral side of the first lens group holding member, a first cam cylinder disposed to be rotatable around an optical axis and movable in an optical axis direction corresponding to a rotation angle, a guide cylinder having a diameter fitting portion rotatably holding the first cam cylinder around the optical axis, and a second cam cylinder. The exterior cylinder does not have a cam groove or a guide groove for guiding another member, and is driven to a position at which part of the exterior cylinder is exposed to an outside corresponding to a rotation angle of the second cam cylinder.

Abstract: Universal electronic exchange system, especially for coupling to telescopes or similar, which includes an automated rotary device provided with a revolver-type rotary plate provided with a plurality of tubular members with holders for respective optical devices, an electric motor connected to the revolver-type rotary plate for transmission of a rotary movement thereto, an electronic unit for tubular-member selection, wherein the electronic unit is made and arranged to receive a selection signal indicative of a tubular member to be used, wherein the selection signal is used for controlling rotation and stopping of the revolver-type rotary plate, process a speed, angular path of rotation and stopping position of the tubular member to be used, and send a command signal to the electric motor of the revolver-type rotary plate for positioning and aligning the tubular member to be used with the optical axis.

Abstract: A zoom lens includes, from the object side, a positive first lens unit not moving for zooming, a negative second lens unit moving for zooming, and a positive third lens unit moving for zooming. The second lens unit includes a negative lens closest to the object side, the third lens unit consists of a 3-1 sub-lens unit and a 3-2 sub-lens unit from the object side. Conditional expressions ?18.0<f1/f2<?3.0, 0.2<f21/f2<3.6, ?0.95<f21/r2<?0.25, 7.0<?2t/?2w<125.0, and 0.3<f31/f32<2.5, are satisfied where f1, f2, and f21 are the focal lengths of the first lens unit, the second lens unit, and the negative lens, r2 is an image-side radius of curvature of the negative lens, ?2w and ?2t are the lateral magnifications of the second lens unit at the wide angle end and the telephoto end, and f31 and f32 are the focal lengths of the 3-1 sub-lens unit and the 3-2 sub-lens unit.

Abstract: The lens device includes an imaging lens and a controller. The imaging lens includes a focusing lens group which moves during focusing and an aberration correction lens group having a refractive power lower than a refractive power of the focusing lens group having the lowest refractive power. The controller adjusts a position of the aberration correction lens group relative to the focusing lens group of which focus sensitivity is maximized according to a changed condition. A predetermined conditional expression related to the focus sensitivity of the focusing lens group is satisfied.

Abstract: A beam homogenizer for transforming a beam of laser-radiation into a flat-top intensity distribution having brighter or darker edges comprises a first lens array, a second lens array, and a positive lens. The first lens array includes a plurality of lens elements that are separated by gaps having no optical power. Brighter or darker edges are produced by selecting a distance between the first and second lens arrays that is less than or greater than the focal length of lens elements in the second lens array.

Abstract: A head-up display (HUD) including a direction-information generator, a shift device, and a display system. The direction-information generator generates direction information to be superimposed on a road surface ahead of a vehicle on which the HUD is mounted. The direction information represents a direction of travel to be followed by the vehicle. The shift device shifts at least some of the direction-change information into the display area when the direction information includes direction-change information to represent a change in the direction of travel and the direction-change information falls outside a display area. The display system displays the direction information within the display area as a virtual image.

Abstract: A multi-axis MEMS assembly includes a micro-electrical-mechanical system (MEMS) actuator configured to provide linear three-axis movement. The micro-electrical-mechanical system (MEMS) actuator includes: an in-plane MEMS actuator, and an out-of-plane MEMS actuator. An optoelectronic device is coupled to the micro-electrical-mechanical system (MEMS) actuator. The out-of-plane MEMS actuator includes a multi-morph piezoelectric actuator.

Abstract: The present disclosure is related to a lens systems. The lens system includes, in order from an object side to an image side, a first lens group G1 having negative refractive power, a second lens group G2 having positive refractive power, a third lens group G3 having positive refractive power, and the lens system satisfies the a ? f 1 f ? ? b , c ? f 2 f ? ? d , e ? f 3 f ? ? f , following condition: and at least partial of G3 is made of material satisfying the following condition: Vd>g and dn/dt?h, wherein a, b, c, d, e, f, g and h are constants, f1 represents a focal length of G1, f2 represents a focal length of G2, f3 represents a focal length of G3, f? represents a focal length of the lens system, Vd represents an abbe constant, n represents a refractive index, t represents temperature, and dn/dt represents a differential of refractive indices against temperature.

Abstract: Provided is a zoom lens including, in order from an object side to an image side, a positive first lens unit, a negative second lens unit, a positive third lens unit, a positive fourth lens unit and a rear lens group consisting of at least one lens unit. An interval between each pair of adjacent lens units is changed during zooming. The rear lens group includes a negative N-th lens unit configured to move during focusing. The second lens unit and the third lens unit are configured to move during zooming. A focal length of the second lens unit, a focal length of the third lens unit, a focal length of the fourth lens unit, a lateral magnification of the fourth lens unit at a wide angle end and a lateral magnification of the fourth lens unit at a telephoto end are appropriately set.

Abstract: Provided is an optical system including, in order from an object side to an image side: a first lens unit having a positive refractive power; a first focus lens unit having a positive refractive power and configured to move toward the object side for focusing from infinity to a closest object distance; and a second focus lens unit having a negative refractive power and configured to move toward the image side during focusing from infinity to the closest object distance, and an interval between each pair of adjacent lens units is changed during focusing. Further, a focal length of the first focus lens unit, a movement amount of the first focus lens unit during focusing from infinity to the closest object distance, a focal length of the optical system, and a total lens length of the optical system are each appropriately set.

Abstract: The zoom lens includes, as lens groups, in order from the object side, only a first lens group having a positive power, a second lens group having a negative power, a third lens group having a positive power, a fourth lens group having a negative power, and a fifth lens group having a positive power. An aperture stop is disposed between a lens surface closest to the image side in the second lens group and a lens surface closest to the object side in the fourth lens group. During zooming, at least the first lens group, the second lens group, the third lens group, and the fourth lens group move. The first lens group consists of a negative lens, a positive lens, and a positive lens in order from the object side. The zoom lens satisfies predetermined conditional expressions.

Abstract: A projection apparatus is provided. A gear structure and a positioning piece in the projection lens module are disposed about opposite sides outside the lens barrel. The gear structure and the positioning piece rotates around an optical axis of the lens barrel acting as a rotating axis. Moreover, when the gear structure rotates, the positioning piece rotates relative to the gear structure. A transmission gear of the motor module meshes with the gear structure to drive the gear structure to rotate. The positioning module is disposed next to the positioning piece and is configured for measuring rotation of the positioning piece to generate a positioning signal. The controller controls the motor module to drive the transmission gear, receives the positioning signal, and calculates a backlash between the transmission gear and the gear structure according to the positioning signal. A backlash detecting system and a method thereof are provided.

Abstract: A heads-up display (HUD) mirror housing. The HUD mirror housing includes a peripheral frame portion extending along a longitudinal axis, a rear body portion connected to the peripheral frame portion connected to each other to house a mirror such that a reflective surface of the mirror is exposed, and first and second pegs extending away from the peripheral frame portion and extending along the longitudinal axis. In this embodiment, the first peg has a first bearing surface configured to bear against a first bracket mounting slot when the HUD mirror housing is in an assembled configuration.

Abstract: A drive apparatus includes an actuator, an engaging body configured to frictionally engage the actuator, and an optical-path-changing member configured so as to be magnetically linked to the engaging body, and configured to change the direction of an optical path. The actuator causes the engaging body to move in a first direction and in a second direction opposite to the first direction. The optical-path-changing member moves due to being biased by the engaging body when the engaging body has moved in the first direction, and the optical-path-changing member moves following movement of the engaging body due to magnetic attraction when the engaging body has moved in the second direction.

Abstract: Systems, devices, and methods for optical engines and laser projectors that are well-suited for use in wearable heads-up displays (WHUDs) are described. Generally, the optical engines of the present disclosure integrate a plurality of laser diodes (e.g., 3 laser diodes, 4 laser diodes) within a single, hermetically sealed, encapsulated package. Such optical engines may have various advantages over existing designs including, for example, smaller volumes, better manufacturability, faster modulation speed, etc. WHUDs that employ such optical engines and laser projectors are also described.

Abstract: Specimen delimiting element which, at least in one region, has a nano-porous material which is transparent to at least one observation radiation which is capturable by means of a microscope. The nano-porous material has pores, the mean pore diameter of which is smaller than the wavelength of the observation radiation, and a proportion of at least 5% of the volume of the nano-porous material is taken up by the pores at least in portions of said nano-porous material.

Abstract: An imaging module includes a single-pupil head component with hyper-hemispherical entrance field with refractive entrance surface, concave exit face, a refractive central zone and reflective peripheral zone. The imaging module also includes a secondary mirror, an aberrations corrector having an aspherical lens, a focusing objective, and an aperture diaphragm between the aberrations corrector and the objective. The head component is quasi-afocal in the vicinity of the field of 90° angular radius, its entrance surface has a ½ vertex angle of smaller than 30°, the secondary mirror is aspherical with variable local focal length with a maximum local power for a zone used by a field of 90° angular radius and minimum smaller by at least a factor of 2 for a zone used by a field of angular radius smaller than 20°.