Abstract: An article of personal protective equipment (PPE) for covering a wearer's face when wearing loupes and/or a light mounted to an eyeglass frame, the apparatus including a set of adapters, each adapter mounted or configured for mounting to an eyeglass frame, wherein each adapter has an outward extending protrusion; and a transparent face shield with opposing sidewalls joined by a convex front with upper and lower portions angled inward to cover the wearer's face when wearing the loupes and/or light, each sidewall configured to engage one of the protrusions to align an apex of the convex with the loupes and/or light.

Abstract: The invention relates to personal display devices and in particular an eyepiece therefor. The eyepiece is adapted for projecting an image from an image plane on one side of the eyepiece through an exit pupil on the opposite side of the eyepiece and comprises at least one stationary lens group and at least two movable lens groups being movable with respect to the stationary lens group along an optical axis between the image plane and the exit pupil. According to the invention, the lens groups are arranged in positive-negative-positive configuration and the movable lens groups are arranged to move along the optical axis between a first state providing a first field-of-view and a second state providing a second field-of-view smaller than the first field-of-view to the image plane. The invention allows for improving optical performance and user experience of personal display devices.

Abstract: Methods and devices for detecting sites of low optical reflectivity from optical coherence tomography, OCT, of the retina are provided. The method includes segmenting retinal layers from OCT data, calculating optical reflectivity of each segmented retinal layers from the OCT data, and detecting sites of low optical reflectivity from the calculated optical reflectivity of the segmented retinal layers. The calculated optical reflectivity can be compared against a predetermined threshold obtained from a healthy population. Segmenting can be carried out according to the optical reflectivity of each identified retinal layer. OCT-Microangiography data can be displayed side-by-side or superimposed with the enface images of the calculated optical reflectivity. The device can be combined with OCT equipment, in particular for displaying the detected sites of low optical reflectivity.

Abstract: A zoom lens system includes a first lens group having positive refractive power; a second lens group having negative refractive power; and a rear group, the first lens group, arranged in that order from an object side. The second lens group includes a second lens group-a having negative refractive power and a second lens group-b having negative refractive power arranged in that order from the object side. During a change in a focus from a short focal length end to a long focal length end to change a magnification power, a distance between the first lens group and the second lens group-a increases, a distance between the second lens group-a and the second lens group-b is changeable or stationary, and a distance between the second lens group-b and the rear lens group decreases.

Abstract: An exterior rearview mirror assembly for a vehicle includes a mirror reflective element, a back plate, and an attaching element having first and second spring-loaded electrical connectors disposed thereat. The attaching element includes a cover element with the spring-loaded electrical connectors disposed thereat. The attaching element includes electrical leads that electrically connect to the spring-loaded electrical connectors and that electrically connect to an electrical connector. With the cover element attached at the attachment portion of the back plate, and with the back plate attached at the rear side of the mirror reflective element, the spring-loaded electrical connectors contact and are biased into electrical contact with respective electrically conductive elements disposed at the rear side of the mirror reflective element, and the electrical connector is disposed at the back plate and configured to electrically connect to a connector of a wire harness of the mirror assembly or of the vehicle.

Abstract: A color filter including a substrate and colored parts formed on the substrate. The substrate has a surface having rectangular unit regions defined by evenly dividing the surface along a first direction and a second direction orthogonal to the first direction. Each of the rectangular unit regions has four rectangular sub-regions which are three colored regions and one uncolored region. A first colored region has a first boundary with the uncolored region and a second boundary with a second colored region. A first colored part is formed in the first colored region with a first gap being formed in the first direction between the first boundary and a side of the first colored part facing the first boundary, and with a second gap greater than the first gap being formed in the second direction between the second boundary and a side of the first colored part facing the second boundary.

Abstract: A half mirror 21 provided in an optical path bends the optical path, and a semi-transmissive polarizing plate 23 increases the transmittance of image light GL in a direction along alignment of the eyes of an observer while the virtual image display device has a wide angle of view and is downsized, thus reducing luminance unevenness between the central region and the peripheral region in the image in the direction and allowing the observer to view a high quality image.

Abstract: A microscope having three-dimensional imaging capability and a three-dimensional microscopic imaging method are provided, the microscope including: at least one excitation device configured to generate a detectable contrast in a detection target region of a sample which is to be detected, in an excitation principal axis direction; at least one detection device, configured to detect the contrast as generated from the detection target region of the sample in a detection principal axis; and at least one movement mechanism, configured to generate a relative movement of the sample relative to the excitation device and the detection device; the relative movement is in a direction neither parallel to nor perpendicular to the excitation principal axis direction or the detection principal axis direction.

Abstract: An optical assembly includes: an optical element, which is transmissive or reflective to radiation at a used wavelength and has an optically used region; and a thermally conductive component, which is arranged outside the optically used region of the optical element. The thermally conductive component can include a material having a thermal conductivity of more than 500 W m?1 K?1. Additionally or alternatively, the product of the thickness of the thermally conductive component in millimeters and the thermal conductivity of the material of the thermally conductive component is at least 1 W mm m?1 K?1.

Abstract: The invention relates to a binocular telescope comprising two tubes, which are connected in an articulate fashion with a swivel hinge pivotal around a joint bending axis. With a forehead contact unit comprising a comprehensive support device the binoculars can be supported in the area of the root of the nose or the forehead of the observer. The support device is here arranged at a body of the binoculars.

Abstract: An embodiment of an eye-mountable device includes an optical lens; an accommodation actuator to provide vision accommodation for the optical lens; a controller including an accommodation logic to select one of a plurality of vision accommodation states for the device, the plurality of vision accommodation states including at least a failsafe focal distance; and a failsafe subsystem including a system health detector, the system health detector to monitor for one or more operational indicators for the device, wherein the failsafe subsystem is to cause the device to transition to a failsafe mode upon the failsafe subsystem identifying a failure condition for the device, the failsafe mode includes setting the vision accommodation state to be the failsafe focal distance.

Abstract: A display device including a display panel and an eyepiece is provided. An image realized by the display panel can be provided to a user by passing through the eyepiece. The display device can further include a front quarter-wave plate and a rear quarter-wave plate in order to increase the path of light traveling toward the eyepiece from the display panel. A barrier can be disposed between the front quarter-wave plate and the rear quarter-wave plate. The barrier can reflect or transmit the light traveling toward the eyepiece from the display panel on a region-by-region, so that the loss of light recognized by the user through the eyepiece can be minimized.

Abstract: Provided is a lens apparatus attachable and detachable to a camera apparatus including: a memory storing information for light amount compensation for image data obtained by pickup of an image formed by the lens apparatus; and a communication device configured to transmit the information to an external apparatus, the information including a coefficient of a polynomial having an n-th order with respect to an image height, “n” being a non-negative integer, the coefficient corresponding to one of a plurality of focal lengths, the plurality of focal lengths including a focal length “f”, which satisfies a conditional expression: 0.9<f/ft/(Fnw/Fnt)<4, where Fnw represents an effective f-number at a wide angle end, Fnt represents an effective f-number at a telephoto end, and “ft” represents a focal length at the telephoto end.

Abstract: A high magnification MWIR continuous zoom optical system is described herein that consists of the following components: a front detachable extender group, a fixed group for focusing incoming radiation, three moving groups for zooming and generating an intermediate image and a relay group. The mentioned optical system has the ability to work with MWIR radiation (3-5 ?m) and generate a thermal image from the gathered radiation. The system also has the ability to zoom continuously in a wide variable focal length range with a high magnification ratio of 20×. With the use of a cooled detector, the combined system allows its user to be able to receive high quality thermal images in all FOV configurations.

Abstract: An optical system includes, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a positive refractive power, and a third lens unit having a negative refractive power. The second lens unit moves during focusing and a distance between adjacent lens units changes. The second lens unit includes a cemented lens closest to an object. The cemented lens includes a positive lens and a negative lens disposed on the image side of the positive lens. A predetermined condition is satisfied.

Abstract: An optic providing reduction in secondary or ghost images includes a beam splitter, a reflective surface, and at least one baffle therebetween. A transmissive surface may be located between the beam splitter and the reflective surface. The baffle is positioned to intercept internally reflected ghost rays while being substantially parallel to outside light rays along a line of sight of the viewer, permitting use in see-through optics. The baffles may be formed of diffusing structures, light absorbing material, and combinations of both. Baffles intercept and scatter or absorb ghost rays to the exclusion of projected image rays that provide a desired projected image which are internally reflected through the optic. An assembly including such optic integrated with a wearable vision system, such as a head-mounted display, is also disclosed for near-eye application.

Abstract: Wide-angle optical imaging lenses designed to have a wide field of view, stability in optical properties over temperature excursions, and, low chromatic aberrations are described. The lenses are comprised of three lens groups. A first group (counting from the object side) having a negative refractive power comprises two negatively powered elements. The first element has a meniscus shape with a convex object surface. The second lens element has a concave image surface and in preferred embodiments is aspherical. The second group having a positive power comprising two elements. Both elements having positive power. The image surface of the first element in the 2nd group and the object surface of the 2nd element in the 2nd group are both convex. An aperture stop is located between the second and third lens groups. The third lens group has a positive power and includes a cemented doublet or triplet, and a singlet element.

Abstract: In one aspect of the present invention is a substrate comprising multiple, independently controllable electrochromic zones, wherein each of the electrochromic zones share a common, continuous bus bar. In one embodiment, of the electrochromic zones are not completely isolated from each other. In another embodiment, each of the electrochromic zones have the same surface area. In another embodiment, each of the electrochromic zones have a different surface area.

Abstract: A camera module is provided, including a holder, a base, a bottom, an image sensor, and a first biasing element. The holder holds an optical lens and is disposed on the base. The bottom supports the image sensor and connects to the base via the first biasing element. The bottom and the image sensor can be moved with respect to the base by the first biasing element.

Abstract: The invention relates to an optical system for restoring a natural image combined with a digital image, in order to characterise and highlight the objects represented on the natural image. The optical system includes an objective lens, an eyepiece, a semi-reflective plate, a processing unit, capturing means and restoring means. The invention also relates to a method for producing such a digital image.