Abstract:
A camera lens includes an open aperture; and a falcate first lens having a positive refractive power with a convex surface toward an imaging surface side. The camera lens satisfies specific conditions.
Abstract:
A two-surface narrow field-of-view (FOV) compound lens for producing an image of an object at an image plane of an imaging system includes a biplanar substrate between a plano-convex lens and a plano-concave lens having a common optical axis. The plano-convex lens has a first planar surface on a first side of the biplanar substrate and is formed of a material having a first Abbe number. The plano-concave lens has a second planar surface on a second side of the biplanar substrate opposite the first side, and is formed of a material having a second Abbe number less than the first Abbe number. The first and second lens have respective focal lengths F1 and F2 that may satisfy −1.4
Abstract:
An imaging lens consists of three lenses of, in order from an object side, a first lens having a biconcave shape, and an object-side surface of which is aspherical, a second lens having negative refractive power and a third lens having positive refractive power with a convex surface facing an image side. The absolute value of a curvature radius of an image-side surface of the third lens is less than the absolute value of a curvature radius of an object-side surface of the third lens.
Abstract:
A lens includes a depth of field (“DOF”) range and a macro range. The macro range is distinct and separate from the DOF range. The macro range is a near field relative to the DOF range. The DOF range provides a first field of view (“FOV”) while the macro range provides a second FOV that is smaller than the first FOV within the DOF range. The lens transfers sharpness from a peripheral viewing region within the macro range into a central viewing region within the macro range.
Abstract:
Methods, systems, and devices are disclosed for capturing and forming large high quality images using monocentric optical imaging. In one aspect, an optical imaging system includes an optical imaging module that collects light to form an image on an imaging surface, one or more imaging sensors each including an array of optical detectors located away from the imaging surface to receive light representing the image initially formed on the imaging surface and to convert the received light into detector signals, and optical waveguides coupled between the imaging surface and the one or more imaging sensors to receive light from the imaging surface and configured to selectively deliver a desired portion of the received light to the one or more imaging sensors while suppressing undesired stray light from reaching the one or more imaging sensors so that the optical waveguides effectuate an optical aperture stop with a limited angle range for receiving light by the one or more imaging sensors.
Abstract:
Provided is a method for designing an image pickup lens which is low cost and applicable to reflow process. The method includes a step of designing the image pickup lens including a lens formed of energy curable resin, on the assumption that the energy curable resin is homogeneous; a step of obtaining an image pickup lens by manufacturing each lens forming the image pickup lens, based on the design; a step of evaluating lens performance of the obtained image pickup lens; a step of designing the image pickup lens again by changing surface shape of at least one surface and/or lens-surface distance in at least one place in the image pickup lens, based on the lens performance obtained by an simulation in the designing step and the lens performance of the image pickup lens obtained in the evaluating step.
Abstract:
A lens assembly for an imaging device may include a lens member for focusing external radiation towards an image sensor of the imaging device, and a screen member adjacent the lens member. A transparent portion may be positioned between the lens member and the external radiation and may have first and second surfaces. A first mask member may be positioned at the first surface of the transparent portion and may have an inlet therein. A second mask member may be positioned at the second surface of the transparent portion and may have an outlet therein. The outlet may be smaller than the inlet.
Abstract:
A lens module includes a lens barrel and a lens and an opaque adhesive layer. The lens includes a central imaging portion and a peripheral non-imaging portion. The lens is received in the lens barrel with the peripheral non-imaging portion contacting the lens barrel. The opaque adhesive layer is applied to a contact portion between the lens barrel and the lens to fixedly secure the lens to the lens barrel and configured for blocking light from entering through the peripheral non-imaging portion.
Abstract:
An imaging optical system for a camera and a video telephony camera employing the imaging optical system. The imaging optical system includes a stop and a first lens that are sequentially arranged from an object side. The first lens has a positive refractive power and two convex aspherical surfaces and satisfies LB/f>0.88 and LT/LB
Abstract:
In a wide-angle optical system for a solid image pickup element, an image pickup lens 2 is a biconvex lens, and its surface closer to an image surface is being formed into such an aspherical shape that the positive refractive power is weaker at a location more spaced in a diametrical direction apart from an optical axis. Further, the image pickup lens 2 satisfies the following condition expression (1): 1.3≧|r1/r2|≧0.8 (1) wherein r1 is a radius of curvature of a surface of the image pickup lens closer to an object, and r2 is a radius of curvature of the surface of the image pickup lens closer to the image surface. Thus, the distortion can be corrected appropriately.