Abstract: A display device includes a first diffraction element that deflects image light and causes the image light to be incident on an eye of an observer, and a second diffraction element disposed between an image light projecting device and the first diffraction element. A diffraction direction of the first diffraction element and the second diffraction element is set depending on whether a sum of the number of reflections of light and the number of times of generating intermediate image between the second diffraction element and the first diffraction element is an even number or an odd number. For example, when the sum is an even number, a direction in which light incident on a first incident surface is diffracted at the highest diffraction efficiency is the same direction as a direction in which light incident on a second incident surface is diffracted at the highest diffraction efficiency.

Abstract: Described herein is a diffraction grating (1) for use in an optical system. The diffraction grating includes a substrate (2) and an array of elongate diffracting elements (3) arranged in a grating profile across the substrate. The grating profile imparts a predefined phase change to optical beams to at least partially correct the beams for optical aberrations present in the optical system.

Abstract: A lens, an optical display device including the lens, and a method for manufacturing the lens. The lens includes at least two lens portions; which have different focal lengths. When human eyes view a real scene image through the at least two lens portions separately, the real scene image is imaged at different image distances. The lens includes different lens portions having different focal lens, and thus can be a multi-focus lens. When the lens is used for an optical display device, the human eyes will see virtual image planes at different distances when viewing a display picture through the different lens portions due to the different focal lengths of the different lens portions. Visual fatigue can be reduced, and also scene images at difference distances can be appropriated, so that the three-dimensional feeling is improved.

Abstract: An ophthalmic progressive addition lens for a myopic and presbyopic wearer having a mean refractive power, PPO(?, ?), a module of resulting astigmatism, ASR(?, ?), an acuity loss value ACU(?, ?), wherein the (?, ?) functions are determined in as-worn conditions of the lens by the wearer, and a first acuity criterion, AcuityCriterion1 which fulfils following requirement: AcuityCriterion1?1340 D2·deg2, and wherein: AcuityCriterion1 is defined as a combination of PPO(?, ?), ASR(?, ?), ADDp, and ACU(?, ?).

Abstract: A method for fabricating a spectacle frame made of a cellulose acetate sheet embedded with the metal piece, where the metal piece is embedded between a main material and auxiliary materials; the metal piece, the main material, and the auxiliary materials are tightly bonded by pressing by a hydraulic press. Since the metal piece is not in contact with a human body, there will be no corrosion problems. The composite plate structure resulting from splicing of the main material and the auxiliary materials have better mechanical performance.

Abstract: An ophthalmic progressive addition lens for an emmetropic and presbyopic wearer having a mean refractive power, PPO(?, ?), a module of resulting astigmatism, ASR(?, ?), an acuity loss value ACU(?, ?), wherein the (?, ?) functions are determined in as-worn conditions of the lens by the wearer, and a first acuity criterion, AcuityCriterion1 which fulfils following requirement: AcuityCriterion1?435 D2.deg2, and wherein: AcuityCriterion1 is defined as a combination of PPO(?, ?), ASR(?, ?), ADDp, and ACU(?, ?).

Abstract: An apparatus includes a fan and a chamber. The fan may be configured to generate an airflow. The chamber may include a tunnel with a first opening and a second opening and be configured to move the airflow through the tunnel and across a camera lens. The first opening may be located close enough to clean the camera lens by directing the airflow across the camera lens. The first opening may be on an edge of the chamber that extends the tunnel in a direction of an optical axis of the camera lens. The edge has an angle that corresponds to a field of view of the camera lens such that the field of view is not obstructed.

Abstract: The smart contact lens system hereby proposed, integrates a number of electronic, electro-optical or optical components on the contact lens substrate. The system, inter alia, is arranged to identify and track changes in pupillary response due to mental task engagement, also known as task-evoked pupillary response. To this end, the system proposed tracks a variety of conditions affecting reflexes such as pupillary reflex or accommodation reflex, in order to compute the extent of pupil dilation attributable to the mental task engagement. Another aspect of present invention is a smart contact lens system, which minimizes pupillary reflex caused by light by controlling the amount of light entering the eye. When pupillary reflex is non-existent, computing a task-evoked pupillary response becomes a much easier task.

Abstract: An optical reflective device for pupil equalization including at least one or more grating structures within a grating medium is disclosed. The grating structures may have reflective axes that need not be constrained to surface normal. The grating structures are configured to reflect light about substantially constant reflective axes across a relatively wide range of wavelengths. The optical reflective device may reflect light towards a specific location, such as an exit pupil or eye box. Each grating structure within the device may be configured to reflect light of a particular wavelength at a plurality of incidence angles.

Abstract: An ophthalmic lens element includes an upper distance viewing zone and a lower near viewing zone. The upper distance viewing zone includes a central region with a first refractive power for clear distance vision and peripheral regions that are relatively positive in power compared to the first refractive power. The lower near viewing zone has a central region that is relatively positive in power compared to the first refractive power to account for accommodative lag. The powers of the peripheral regions of the lower near viewing zone are one of: i) equal to the power of the central region of the lower near viewing zone, ii) relatively positive in comparison to the power of the central region of the lower near viewing zone.

Abstract: Various examples of methods, systems and devices are provided for ophthalmic examination. In one example, a handheld system includes an optical imaging assembly coupled to a user device that includes a camera aligned with optics of the optical imaging assembly. The user device can obtain ocular imaging data of at least a portion of an eye via the optics of the optical imaging assembly and provide ophthalmic evaluation results based at least in part upon the ocular imaging data. In another example, a method includes receiving ocular imaging data of at least a portion of an eye; analyzing the ocular imaging data to determine at least one ophthalmic characteristic of the eye; and determining a condition based at least in part upon the at least one ophthalmic characteristic.

Abstract: An augmented reality system includes an electronic contact lens and a plurality of conductive coils to be worn, for instance, around a neck, around an arm, or on a chest of a user. The conductive coils can inductively couple to the electronic contact lens by producing magnetic fields that the electronic contact lens can convert into power. A direction of the resulting magnetic at the electronic contact lens can rotate over time, enabling the electronic contact lens to periodically form a strong inductive coupling with the plurality of conductive coils despite the orientation of the electronic contact lens. The electronic contact lens can also output a feedback signal representative of the power produced at the electronic contact lens or an orientation signal representative of the orientation of the eye, and the magnetic fields produced by the conductive coils can be altered based on the feedback signal or orientation signal.

Abstract: There is provided an imaging apparatus capable of efficiently dissipating heat generated by an electronic circuit unit and eliminating noise. The imaging apparatus includes a housing 8, which includes an outer frame member 7 and an inner frame member 6 that is made of a metal, a lens unit 3, which is attached to an opening of the housing 8, a substrate 41, on which a heat dissipating wiring line is formed, an electronic circuit unit 4, which is provided in the inner frame member 6, and a fixing member 9, which is made of a metal, is in contact with the heat dissipating metal wiring line 43 in the electronic circuit unit 4 and the inner frame member 6, and fixes the electronic circuit unit 4 to the inner frame member 6. The configuration described above achieves not only efficient dissipation of the heat from the electronic circuit unit 4 via the heat dissipating metal wiring line 43 and the fixing member 9 to the inner frame member 6 but noise elimination.

Abstract: A zoom optical system (ZL) comprises, in order from an object: a first lens group (G1) having positive refractive power; an intermediate group (GM) including at least one lens group and having negative refractive power as a whole; an intermediate side lens group (GRP1) having positive refractive power; a subsequent side lens group (GRP2) having positive refractive power; and a subsequent group (GR) including at least one lens group. The subsequent side lens group (GRP2) moves upon zooming. The subsequent side lens group (GRP2) includes at least two lenses. A following conditional expression is satisfied. 0.2<fRP1/fRP2<0.8 where, fRP1 denotes a focal length of the intermediate side lens group (GRP1), and fRP2 denotes a focal length of the subsequent side lens group (GRP2).

Abstract: The present invention relates to an antireflection film being capable of realizing high scratch resistance and antifouling property while simultaneously having low reflectivity and high light transmittance, and further being capable of enhancing screen sharpness of a display device.

Abstract: The present invention provides a high transmission glass with an ITO film which is excellent in a higher transmittance and reduced reflection, produced by fewer steps at lower cost, and used as an optical switch for optical communication utilizing infrared ray. The high transmission ITO film-coated glass is used for a liquid crystal device utilizing infrared ray having a wavelength region from 1530 nm to 1570 nm as incident light. The high transmission ITO film-coated glass 10 is configured to be arranged to sandwich a liquid crystal layer, the high transmission ITO film-coated glass has an ITO film 2 formed on an inside face of the glass substrate 1 to face the liquid crystal layer when arranged with the liquid crystal layer, and the high transmission ITO film-coated glass has a SiOx film 11 (1?x<2) formed between the ITO film 2 and the glass substrate 1.

Abstract: The present disclosure provides a display device, belonging to a field of display technology, and can address a problem in an existing display device that short-wavelength blue light causes harm to human eyes. The display device includes a light attenuation unit, wherein the light attenuation unit comprises at least one first layer and at least one second layer which are alternately provided, the first layer having a refractive index greater than a refractive index of the second layer, and the light attenuation unit is configured to reduce a transmittance of the short-wavelength blue light among incident light.

Abstract: Provided is a circularly polarizing plate for an organic EL display apparatus, which has a high barrier function, is extremely thin, and has an excellent antireflection function. The circularly polarizing plate for an organic EL display apparatus of the present invention includes in this order: a polarizer; a retardation layer, which is configured to function as a ?/4 plate; a barrier layer; and a pressure-sensitive adhesive layer, which has a barrier function, in which the barrier layer includes thin glass having a thickness of from 5 ?m to 100 ?m.

Abstract: The lens driving device includes: an AF driving section that includes AF coils and AF magnets, and moves an AF movable part including the AF coils in an optical-axis direction with respect to an AF fixing part including the AF magnets; and an OIS driving section that includes OIS magnets and OIS coils, and sways an OIS movable part including the AF driving section and the OIS magnets in a plane orthogonal to the optical-axis direction with respect to an OIS fixing part including the OIS coil. The AF movable part includes a first position detection magnet and the OIS fixing part includes a hall element provided facing the first position detection magnet in the optical-axis direction.

Abstract: An optical system is provided and includes a fixed module, a movable module, a driving coil, an electrical circuit and a magnetic element. The fixed module includes a base and a circuit board, and the movable module includes an optical member holder, configured to hold an optical member. The magnetic element corresponds to the driving coil and is configured to generate an electromagnetic driving force to drive the optical member holder to move relative to the base. The driving coil and the electrical circuit are integrally formed in the circuit board. The driving coil partially overlaps the electrical circuit when viewed along a direction perpendicular to an optical axis of the optical member.