Abstract: A lens driving apparatus comprising: a stepping motor for driving a lens; a rotation detection sensor for detecting a rotation position of the stepping motor; and a controller which is capable of switching between open-loop control that performs position instruction in accordance with a predetermined pattern and closed-loop control that performs position instruction on the basis of follow-up delay, changes and accelerates the velocity for advancing the position of the stepping motor on the basis of a fixed velocity pattern by open-loop control when the lens starts moving, and transitions to the closed-loop control upon the velocity corresponding to the velocity pattern reaching a predetermined value.

Abstract: An optical device mount is made largely as a single unitary, continuous, and monolithic piece of material. The single-material piece for optical mount includes a frame, a pair of overlapping plates that secure an optical device (an optic) such as a lens or mirror, and flexures that couple the plates to each other and to the frame, so as to allow tilt of the optical device relative to the frame in multiple directions. The optical device mount may include tilt adjustment mechanisms for adjusting the tilt in the multiple directions, for example by putting forces on the plates and/or frame that cause flexing at the flexures, thereby tilting the optical device. The material for the single piece of the optical mount may be any of a variety of suitable materials, such as metals, polymers, or other suitable materials.

Abstract: A contact lens includes, in order from a center to a periphery, an optical zone and at least two structural zones. The optical zone includes a front surface and a back surface, wherein at least one of the front surface and the back surface is aspheric, and the optical zone provides a positive force or a negative force. The structural zones concentrically surround the optical zone, wherein one of the structural zones provides a positive force, and the other of the structural zones provides a negative force. A composition for manufacturing the contact lens includes at least two kinds of monomers, at least one kind of crosslinking agent, at least one kind of diluent and at least one kind of initiator.

Abstract: Systems and methods for creating fully custom products from scratch without exclusive use of off-the-shelf or pre-specified components. A system for creating custom products includes an image capture device for capturing image data and/or measurement data of a user. A computer is communicatively coupled with the image capture device and configured to construct an anatomic model of the user based on the captured image data and/or measurement data. The computer provides a configurable product model and enables preview and automatic or user-guided customization of the product model. A display is communicatively coupled with the computer and displays the custom product model superimposed on the anatomic model or image data of the user. The computer is further configured to provide the customized product model to a manufacturer for manufacturing eyewear for the user in accordance with the customized product model.

Abstract: The present invention discloses a hand-held autonomous visual acuity measurement apparatus and a visual acuity measuring method. The invention comprises a corneal curvature measurement module comprising a first light source for emitting a first light beam and a first image collector for collecting an image formed from the first light beam after it has been reflected by cornea, the first image collector being movably provided in the corneal curvature measurement optical path of the corneal curvature measurement module, and the corneal curvature measurement module further comprises a first motor for driving the first image collector to move along the corneal curvature measurement optical path so that the first image collector moves to the imaging position.

Abstract: An optical waveguide including an input-coupler, a first intermediate-component, a second intermediate-component and an output-coupler is described herein. The input-coupler couples, into the waveguide, light corresponding to an image associated with an input-pupil and directs the light toward the first intermediate-component. The first intermediate-component performs horizontal or vertical pupil expansion and redirects the light corresponding to the image toward the output-coupler. The second intermediate-component is a diffractive component located between the first-intermediate component and the output-coupler and performs pupil redistribution on a portion of the light corresponding to the image before the portion reaches the output-coupler. The output-coupler performs the other one of horizontal or vertical pupil expansion and couples, out of the waveguide, the light corresponding to the image. Related methods and systems are also described.

Abstract: A marker (10) includes a lenticular lens (11) formed from a translucent material to have a plurality of convex portions (13) positioned to line up in, for example, at least one direction. The optical axes (OA1) of the convex portions (13) all intersect with an optical reference point (OP) on the product optical axis (PA). The optical axes (OA1) of the convex portions (13) are all orthogonal with and pass through the center of the bottom surfaces of grooves (14). Colored portions (15) are accommodated in the grooves (14).

Abstract: There is provided an imaging lens with high-resolution which realizes reducing size, the low-profileness, low F-number and small telephoto ratio. An imaging lens comprising in order from an object side to an image side, a first lens having positive refractive power, a second lens, a third lens, a fourth lens, a fifth lens having the positive refractive power, and a sixth lens, wherein a below conditional expression is satisfied: 0.6<TTL/f<1.0 where TTL: total track length, and f: focal length of the overall optical system.

Abstract: A pair of goggles with a lens assembly, a goggle frame, and at least one lens retention shelf is disclosed. The lens assembly includes a lens with a projection extending from the assembly. The goggle frame is made of a first material and has a frame aperture sized large enough to receive the projection from the lens assembly through it. The lens retention shelf is made of a second material harder than the first material and is disposed behind the frame. The first lens retention shelf includes a projection connector corresponding to the projection, the projection connector is aligned with the frame aperture and sized sized to receive and engage the projection with the goggle frame interposed between the lens retention shelf and the lens.

Abstract: In an optical display system that includes a waveguide with multiple diffractive optical elements (DOEs), gratings in one or more of the DOEs may have an asymmetric profile in which gratings may be slanted or blazed. Asymmetric gratings in a DOE can provide increased display uniformity in the optical display system by reducing the “banding” resulting from optical interference that is manifested as dark stripes in the display. Banding may be more pronounced when polymeric materials are used in volume production of the DOEs to minimize system weight, but which have less optimal optical properties compared with other materials such as glass. The asymmetric gratings can further enable the optical system to be more tolerant to variations—such as variations in thickness, surface roughness, and grating geometry—that may not be readily controlled during manufacturing particularly since such variations are in the submicron range.

Abstract: An electrically variable reflectance mirror reflective element includes front and rear glass substrates with an electrochromic medium disposed therebetween and bounded by a perimeter seal. A perimeter layer is disposed at a second surface of the front substrate proximate a perimeter edge of the front substrate. The perimeter layer conceals the perimeter seal from view by a driver of a vehicle. No part of the rear substrate extends beyond any part of the front substrate. At least a portion of the mirror reflector disposed at at least a portion of the third surface of the rear substrate extends from under the perimeter seal outward towards at least a portion of the perimeter edge of the rear substrate. The mirror reflector includes a stack of thin films that includes at least a first metal thin film and a second metal thin film.

Abstract: The display device includes: a display unit that projects a light beam onto a windshield so that the light beam is reflected from the windshield such that one or more virtual images are displayed in a space further than the windshield in a depth direction through the windshield; and a controller that controls the display unit so that a first vertical image and a second vertical image included in the one or more virtual images and have different distances from the windshield in the depth direction, are displayed in a time-division manner.

Abstract: A mirror arrangement, in particular for a microlithographic projection exposure apparatus, includes at least one mirror element bearing a mirror surface provided for reflecting electromagnetic radiation, at least one carrier element including a head section, which is provided for receiving at least one mirror element, and also a seat section. The arrangement further includes a mount arrangement, for receiving the at least one carrier element. At least one insertion opening is in the mount arrangement. The seat section of the carrier element plunges into the insertion opening. In addition, the arrangement includes a channel device for guiding a heat transfer medium is formed in the mount arrangement in the region surrounding the seat section. A method for dissipating heat is provided.

Abstract: The present disclosure discloses a camera optical lens. The camera optical lens includes, in an order from an object side to an image side, a first lens, a second lens having a positive refractive power, a third lens having a positive refractive power, a fourth lens, a fifth lens, and a sixth lens. The first lens is made of glass material, the second lens is made of plastic material, the third lens is made of glass material, the fourth lens is made of plastic material, the fifth lens is made of plastic material, and the sixth lens is made of plastic material. The camera optical lens further satisfies specific conditions.

Abstract: A point-by-point design method for off-axis aspheric optical system, in which feature light rays from different field angles and aperture coordinates are considered. Some of the feature data points are calculated first and surface fitted into an initial aspheric surface. Then, intermediate point calculations, feature data point calculations, and aspheric surface fitting were repeated continuously to calculate remaining feature data points and the desired aspheric surface are repeated continuously to calculate remaining feature data points and a desired aspheric surface. A least-squares method with a local search algorithm is used for aspheric surface fitting and deviations in both the coordinates and normals are used to reduce error.

Abstract: A transparent wearable data display having a source of collimated light, a deflector for deflecting the collimated light into a scanned beam, and a first of switchable grating elements sandwiched between first and second parallel transparent substrates, which together functioning as a first light guide. A first coupling is provided for directing the scanned beam into a first total internal reflection (TIR) light path of the first light guide along the first array column. The grating elements having diffracting and non-diffracting states, in their diffracting state deflecting light out of said light guide. The grating elements are switchable into their diffracting states one group of elements at a time.

Abstract: An objective of the present disclosure is to ensure a sufficient visual field of the exterior as viewed by a lens wearer, the lens having a highly ornamental matte-colored visual appearance. A semitransparent lens 11 has a lens substrate 12, a reflection layer 13, a hard-coat layer 15, and an intermediate layer 14. A surface of the lens substrate 12 has fine irregularities. The reflection layer 13 is disposed on the lens substrate 14. The hard-coat layer 15 is disposed on the reflection layer 13. The intermediate layer 14 is arranged between the lens substrate 12 and the reflection layer 13, and is formed from a material having a difference in refractive index less than or equal to 0.03 relative to the hard-coat layer 15. Haze value of the semitransparent lens 11 is in a range of 0.4 to 2.5 as measured in accordance with ISO 12312-1 according to the test method of ISO 12317.97.

Abstract: An optical lens makes object light rays transmit from an object side to an image side on an optical axis and form an image on an image plane. The optical lens comprises a lens group establishing the optical axis, comprising a first lens and a second lens arranged in order from the image side to the object side, wherein the first lens has an image-side surface which is a concave face and has a point of inflection arranged thereon; and a first aperture stop and a second aperture stop separately located on the optical axis. The optical lens meets the thinning tendency.

Abstract: An objective element for use in an endoscope is provided. The objective element comprises a flat glass plate that is in contact with the plano side of a plano-convex lens. The side of the flat glass plate in contact with the plano-convex lens is coated with an opaque material other than an aperture that is in line with the axis of the plano-convex lens. Alternatively, the plano side of a plano-convex lens may be coated with an opaque material other than an aperture that is in line with the axis of the plano-convex lens.

Abstract: An optical-lens-set includes a first lens element of a concave image-side surface near its optical-axis, a sixth lens element of negative refractive power and of a concave image-side surface near its optical-axis to go with a fifth lens element of a concave object-side surface near its optical-axis or with a seventh lens element of negative refractive power. The Abbe number ?1 of the first lens element, the Abbe number ?3 of the third lens element, the Abbe number ?4 of the fourth lens element, the Abbe number ?5 of the fifth lens element, the Abbe number ?6 of the sixth lens element and the Abbe number ?7 of the seventh lens element together satisfy 5?5?1?(?3+?4+?5+?6+?7).