Abstract: A camera optical lens is provided. The camera optical lens includes, from an object side to an image side, a first lens, a second lens having a positive refractive power, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens. The camera optical lens satisfies following conditions: 1.60?f1/f?3.00, and 2.50?d13/d14?12.00, where f denotes a focal length of the camera optical lens, f1 denotes a focal length of the first lens, d13 denotes an on-axis thickness of the seventh lens, and d14 denotes an on-axis distance from an image side surface of the seventh lens to an object side surface of the eighth lens. The camera optical leans according to the present disclosure has good optical performance while satisfying design requirements for ultra-thin and wide-angle lenses having large apertures.

Abstract: A stereoscopic vision endoscope objective optical system includes, in order from an object side, a first lens group having a negative refractive power, a second lens group having a positive refractive power, and a rear-side lens group having a positive refractive power. The rear-side lens group includes a first rear group and a second rear group. The first lens group and the second lens group are disposed so that an optical axis of the second lens group coincides with an optical axis of the first lens group. The optical axis of the first lens group is located between an optical axis of the first rear group and an optical axis of the second rear group. Each of the first rear group and the second rear group includes a first sub group, an aperture stop, and a second sub group, and the first sub group includes a negative lens.

Abstract: Techniques are described for forming a gradient index (GRIN) lens for propagating an electromagnetic wave comprising receiving, by a manufacturing device having one or more processors, a model comprising data specifying a plurality of layers, wherein at least one layer of the plurality of layers comprises an arrangement of one or more volume elements comprising a first dielectric material and a second dielectric material, wherein the at least one layer of the plurality of layers has a dielectric profile that is made up of a plurality of different effective dielectric constants of the volume elements in the layer, and generating, with the manufacturing device by an additive manufacturing process, the GRIN lens based on the model.

Abstract: The present disclosure relates to optical devices and systems, specifically those related to light detection and ranging (LIDAR) systems. An example device includes a shaft defining a rotational axis. The shaft includes a first material having a first coefficient of thermal expansion. The device also includes a rotatable mirror disposed about the shaft. The rotatable mirror includes a multi-sided structure having an exterior surface and an interior surface. The multi-sided structure includes a second material having a second coefficient of thermal expansion. The second coefficient of thermal expansion is different from the first coefficient of thermal expansion. The multi-sided structure also includes a plurality of reflective surfaces disposed on the exterior surface of the multi-sided structure. The multi-sided structure yet further includes one or more support members coupled to the interior surface and the shaft.

Abstract: The invention relates to a waveguide display element comprising a waveguide body and an in-coupling grating (21) arranged to the waveguide body. The in-coupling grating (21) is configured to couple incoming light into the waveguide body into two separate directions (26A, 26B) using opposite diffraction orders (IC:+1, IC:?1) for splitting the field of view of the incoming light. Further the in-coupling grating (21) is configured, typically by setting its period suitably short, such that said coupling takes place only at wavelengths below a threshold wavelength residing in the visible wavelength range. The invention also relates to a waveguide stack (51 A, 51 B, 51 C).

Abstract: The present disclosure provides a prime lens module and an in-vehicle camera system. From an object side to an imaging side thereof, the prime lens module sequentially includes: a first lens with a negative focal power, a second lens with a negative focal power, a third lens with a positive focal power, a fourth lens with a positive focal power, a fifth lens with a positive focal power, a sixth lens with a negative focal power, and a seventh lens with a positive focal power. The first lens is a meniscus spherical lens. The second lens is a biconcave spherical lens. The third lens is a biconvex spherical lens and bonded to the second lens. The fourth lens is a biconvex spherical lens or a biconvex aspheric lens. The fifth lens is a biconvex spherical lens. The sixth lens is a biconcave spherical lens and bonded to the fifth lens.

Abstract: An imaging lens with better performance including in focusing is disclosed. A first lens group always fixed and having positive refractive power, and a first focus lens group that moves in an optical axis direction at the time of focusing are included in order from the object side to the image side. A last lens group always fixed and having negative refractive power, and a second focus lens group that moves in an optical axis direction at the time of focusing are included in order from the image side to the object side. At least one of the first focus lens group or the second focus lens group has negative refractive power. The conditional expression 0.4<f/ff<1.0, where f: the focal length of the whole system, and ff: the combined focal length from the first lens group to the first focus lens group, is preferably satisfied.

Abstract: The present disclosure provides a camera optical lens including, from an object side to an image side in sequence: a first lens having a positive refractive power, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens; and the camera optical lens satisfies conditions of: 0.95?f/TTL; 3.20?f2/f?5.00; and 0.20?(R11+R12)/(R11?R12)?0.90. The camera optical lens can achieve good optical performance while meeting the design requirements for long focal length and ultra-thinness.

Abstract: The present disclosure discloses a camera optical lens, which includes, from an object-side to an-image side: a first lens having a positive refractive power, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eight lens, which satisfies following conditions: 0.95?f/TTL; ?3.50?f2/f??1.80; and 2.50?(R5+R6)/(R5?R6)?20.00; where f denotes a focal length of the camera optical lens; f2 denotes a focal length of the second lens; TTL denotes a total optical length from an object-side surface of the first lens to an image surface of the camera optical lens along an optic axis; R5 denotes a curvature radius of an object-side surface of the third lens; and R6 denotes a curvature radius of an image-side surface of the third lens. The camera optical lens can achieve good optical performance while meeting the design requirement for large aperture, long focal length and ultra-thinness.

Abstract: The present disclosure discloses a camera optical lens including eight lenses which are, from an object-side to an-image side: a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a negative refractive power, a fourth lens having a positive refractive power, a fifth lens having a positive refractive power, a sixth lens having a refractive power, a seventh lens having a negative refractive power and an eight lens having a negative refractive power, which satisfies following conditions: 0.95?f/TTL; ?5.00?f2/f??2.00; and 0.40?(R9+R10)/(R9?R10)?1.00; where TTL denotes a total optical length from an object-side surface of the first lens to an image surface of the camera optical lens along an optic axis; f denotes a focal length of the camera optical lens. The camera optical lens can achieve good optical performance while meeting the design requirement for long focal length and ultra-thinness.

Abstract: Examples include a device including a fluid lens having a membrane, a substrate, and a fluid at least partially enclosed between the membrane and the substrate. One or more support structures may be configured to provide a guide path for an edge portion of the membrane, which may be an elastic membrane in tension. In some examples, a membrane includes a membrane polymer, such as a thermoplastic urethane polymer, and a polymer additive, such as an acrylate polymer. The polymer additive may reduce or substantially eliminate diffusion of the fluid into the membrane, which may increase the stability and performance of the fluid lens.

Abstract: A diffraction optical waveguide, a grating structure, and a display device are disclosed. An arrangement period of a grating line of the grating structure is T and the grating line has a cross-sectional profile with a narrow top and a wide bottom. The cross-sectional profile includes five feature points, which respectively have coordinates (0, 0), (L2, H2), (L3, H3), (L4, H4), (L5, 0), and satisfy: 0.2T?L2<L3<L4?L5?T; L3?0.8T; L3?L2?0.1T; L4?0.8T; 0?H2??; 0.2??H3??; 0.6??H4?1.8?; max(H2, H3)?H4; ?0.6??H3?H2?0.6?, 0.6??H3+H2?1.8?; 0.5?/T?H3/L3?2?/T, where ? is a wavelength. According to an embodiment of the present disclosure, the cross-sectional profile can be adjusted by controlling parameters of the feature points, the optical effect is improved and degrees of freedom in design and regulation are increased.

Abstract: A method for generating an image in a near-eye display may include operating a light source to emit the image as incident light. The light source may be configured such that incident light as received by the light reflecting elements compensates for the chromatic reflectance of the light reflecting elements. The method may include coupling the incident light into a light-transmitting substrate, thereby trapping the light between first and second major surfaces of the light-transmitting substrate by total internal reflection and coupling the light out of the substrate by the light reflecting elements having chromatic reflectance.

Abstract: A gonioscopic attachment can attach to a gonioscope and can include atraumatic retention elements that are configured to engage an eye to retain the gonioscope relative to the eye. The gonioscopic attachment can be configured to position the gonioscope so that at least a portion of the concave distal surface of the gonioscopic optical element is spaced apart from the eye, and/or so that the curvature of the distal surface is angularly offset from the curvature of the eye. The gonioscope can include a fixation point configured to be visible to the subject when the gonioscope is positioned on the eye. In some embodiments, the retention elements can be incorporated directly into the gonioscope. A coupling mechanism can couple the gonioscope to a lid speculum. The gonioscope can include a light pipe, which can be configured to directly light into the eye.

Abstract: 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 capabilities and restoring capabilities. Other embodiments relate to a method for producing such a digital image.

Abstract: A phase modulation active device and a method of driving the phase modulation active device are provided. The phase modulation active device includes channels independently modulating a phase of incident light. The method includes selecting a first phase value and a second phase value to be used for the channels, setting a binary phase profile by allocating the selected first phase value or the selected second phase value to each of the channels quasi-periodically, in a sequence in which the channels are arranged, and driving the phase modulation active device, based on the set binary phase profile.

Abstract: An optical image capturing system comprising, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The first lens element with negative refractive power has a concave image-side surface. The second lens element, the third lens element and the fourth lens element have refractive power. The fifth lens element has refractive power. The sixth lens element with refractive power has an image-side surface being concave in a paraxial region and includes at least one convex shape in an off-axial region, wherein the surfaces thereof are aspheric. The seventh lens element with refractive power has an image-side surface being concave in a paraxial region and includes at least one convex shape in an off-axial region, wherein the surfaces thereof are aspheric.

Abstract: The invention relates to an ophthalmic lens (1) for a pair of sunglasses, said ophthalmic lens including at least one substrate (13), the lens (1) having a transmission spectrum such that: the transmittance at wavelengths shorter than 380 nm is lower than 1%; the spectrum includes a first transmittance maximum (MAX-1) having a transmittance higher than 8% between 390 nm and 420 nm; the spectrum includes a first transmittance minimum (MIN-1) between 426 nm and 440 nm; the transmittance between 450 nm and 500 nm is higher than 10%; the spectrum includes between 570 nm and 595 nm a second transmittance minimum (MIN-2); the spectrum includes between 590 nm and 620 nm a second transmittance maximum (MAX-2); the spectrum includes in the wavelength range comprised between 620 nm and 640 nm a third transmittance minimum (MIN-3); the transmittance at wavelengths longer than 640 nm is higher than 14%.

Abstract: Methods, systems and computer program products for displaying an augmented image using a holographic object via a mobile device are provided. Aspects include receiving, by a processor of the mobile device while displaying an image on a display screen of the mobile device, a user input. Aspects also include identifying a portion of the image based on the user input. Aspects further include outputting, by a holographic module of the mobile device, one or more dynamic holographic objects in three-dimensional space above the display screen, wherein the one or more dynamic holographic objects are determined at least in part based on the portion of the image identified.

Abstract: Provided is a glass type electronic device in which an optical driving assembly is disposed in a spatially efficient position and which stably implements an optical path. The glass type electronic device includes a binocular lens provided to correspond to both eyes of a wearer, a lens frame fixed to the binocular lens and seated on a head of the wearer, an electronic component case fixed to the lens frame, an optical driving assembly mounted in the electronic component case for emitting an image light to the binocular lens, and a battery supplying power to the optical driving assembly. The electronic component case is disposed to correspond to an area between superciliary arches of the wearer.