Abstract: The present application relates to the field of optical lenses, and in particular, relates to a microscope objective lens suitable for use in a device such as a microscope. The microscope objective lens includes in order from an emitting side to an objective side: a first lens having a positive refractive force, a second lens having a negative refractive force, a third lens having a positive refractive force, a fourth lens having a positive refractive force, a fifth lens having a negative refractive force, and a sixth lens having a positive refractive force. The following relationship expressions are satisfied: ?5.00?R11/R12??1.50; 0.40?WD/TTL?0.60; 1.00?R1/((n1?1)*f)?4.00; 2.00?d5/d4?6.00. The microscope objective lens of the present application lens has excellent optical performance, low distortion, and a long working distance, which is particularly suitable for optical microscope.

Abstract: A finished lens with a predetermined shape, including one front face, one back face and a perimeter corresponding to the shape, including a prescription part on the lens that together with the front face fulfills prescription data of a wearer and a peripheral part on the lens, the prescription part being delimited by a thickness curve and the peripheral part extending from the thickness curve towards an outer edge of the lens, the thickness curve corresponding to a value of thickness less than or equal to a predetermined thickness requirement.

Abstract: Optical devices with different regions or pixels can form an image. An opaque-region 14 can be used to separate different pixels. Sometimes the optical device needs to be flexible, for elongation or stretching onto a curved surface. But, the opaque-region 14 can be damaged as it is stretched. A flexible optical device can include a modified opaque-region 14 for improved flexibility. The opaque-region 14 can include a thin-film 12 with multiple cavities 13, multiple zones 63, or both. Each zone 63 can have a shape optimized to both block incoming light and for flexibility. Each zone 63 can be encircled and separated from adjacent zones 63 by a groove 62. The cavities 13 and the separate zones 63 can allow the opaque-region 14 to bend or stretch without cracking or delamination of the thin-film 12.

Abstract: An aerial display apparatus that ensures a display quality of an aerial image is provided. An aerial display apparatus according to an embodiment includes: a display unit (20) including a display surface on which an image is displayed and configured to emit display light from the display surface; and a mirror device disposed obliquely with respect to the display surface of the display unit (20), and configured to reflect the display light emitted by the display unit (20) to allow an aerial image to be formed at a position that is plane-symmetrical to the display unit (20), a light distribution of the display light being greater than ?35.0 degrees and less than +35.0, given that a normal direction of the display surface is 0 degrees.

Abstract: An image delivery system (IDS) comprising: a first waveguide comprising an input aperture for receiving an input virtual image provided by a display engine and a first plurality of first facets positioned to reflect light from the received input virtual image out from the first waveguide; a second waveguide configured to receive the light reflected out from the first waveguide and comprising a second plurality of second facets positioned to reflect the received light out from the second waveguide to project an output virtual image responsive to the input into an eye motion box (EMB); and a partially reflective coating formed on each facet selected from a number of different partially reflective coatings less than a total number of facets equal to a sum of the number of facets in the first and second pluralities; wherein the output virtual image exhibits a fidelity of 80% or better.

Abstract: A method for distance measurement includes: (a) measuring a focus distance between a z-focus position of a processing laser beam and a reference surface, and measuring a reference distance between a reference arm mirror of a coherence tomography apparatus and the reference surface using a measurement beam. The processing laser beam is directed onto the reference surface via a laser processing optical unit. The measurement beam is directed onto a same point of the reference surface as the processing beam or onto a point of the reference surface next to an impingement point of the processing beam. The method further includes (b) measuring a workpiece distance between the reference arm mirror and a workpiece surface using the measurement beam directed onto the workpiece surface, and (c) determining the distance between workpiece surface and the z-focus position based on the reference distance and the workpiece distance and the focus distance.

Abstract: A light deflector includes a movable portion including a reflector; multiple drive beams supporting the movable portion to allow the movable portion to be oscillatable; at least one supporting part supporting the multiple drive beams, the at least one supporting part including a first connecting portion and a second connecting portion different from the first connecting portion; and a stopper having one end connected to the first connecting portion and the other end connected to the second connecting portion on the at least one supporting part to be contactable with and straddle the multiple drive beams.

Abstract: Imaging systems with an integrated infrared cut off filter and methods for operating same. One example system includes an image sensor and an electronic processor coupled to the image sensor. The image sensor includes a plurality of image recording pixels and a plurality of reserved pixels. A subset of the plurality of reserved pixels are covered by an infrared cut-off filter. The electronic processor is configured to determine a first visible light intensity for the subset of the plurality of reserved pixels. The electronic processor is further configured to control the image sensor to operate in one of a day mode and a night mode based on the first visible light intensity.

Abstract: A projection arrangement for a head-up display (HUD), includes a composite pane, which includes an outer pane and an inner pane joined to one another via a thermoplastic intermediate layer and has an HUD region; an electrically conductive coating on the surface of the outer pane or the inner pane facing the intermediate layer or within the intermediate layer; and an HUD projector, which is directed at the HUD region; wherein the radiation of the projector is p-polarised, wherein the electrically conductive coating includes a first dielectric layer or layer sequence, a first electrically conductive layer, a second dielectric layer or layer sequence, a second electrically conductive layer, a third dielectric layer or layer sequence, a third electrically conductive layer, a fourth dielectric layer or layer sequence, a fourth electrically conductive layer, and a fifth dielectric layer or layer sequence.

Abstract: A starshade is provided that includes a circular base and opaque petals pivotably coupled to a perimeter of the circular base. The opaque petals are configured to pivot radially outward from a center axis of the circular base, wherein each of the opaque petals overlaps at least a portion of an adjacent opaque petal, and wherein each of the opaque petals tapers outward through a proximal section of the opaque petal and tapers inward through a distal section of the opaque petal.