Abstract: A wide-angle image lens, in the order from the object side to the image side thereof, includes a first lens, a second lens, a third lens, a fourth lens and an image plane. The image lens satisfies the following formulas: D/TTL>0.45; CT4/ET4<2.11; Z/Y>0.06; wherein D is the maximum image diameter of the image plane; TTL is a total length of the wide-angle image lens; CT4 is a distance along an optical axis from the seventh surface to the eighth surface; ET4 is a distance along the optical axis from an outmost edge of the seventh surface to an outmost edge of the eighth surface; Z is a distance from a central point of the fifth surface to an outmost edge of the sixth surface along the optical axis; Y is a distance from the outmost edge of the sixth surface to the optical axis.

Abstract: A wide-angle image lens, in the order from the object side to the image side thereof, includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and an image plane. The wide-angle image lens satisfies the formulas: D/TTL>1.16;D/L>1.17;Z/Y>0, wherein D is the maximum image diameter of the wide-angle image plane; TTL is the total length of the wide-angle image lens; L is a distance from an outmost edge of an image surface of the fifth lens to an optical axis of the wide-angle image lens; Z is a distance from a central point of the objective surface of the fourth lens to an outmost edge of the image surface of the fourth lens, Y is a distance from the outmost edge of the image surface of the fourth lens to the optical axis.

Abstract: An image lens, in order from an object side to an image side thereof, includes a first lens including a first surface and a second surface, a second lens including a third surface and a fourth surface, a third lens including a fifth surface and a sixth surface, a fourth lens including a seventh surface and a eighth surface, and an image plane. The image lens satisfies the following formulas: D/TTL>1.11; D/L>1.13; Z/Y>0.076; wherein D is the maximum image diameter of the image plane; TTL is a total length of the image lens; L is a distance from an outermost edge of the eighth surface to an optical axis of the image lens; Z is a distance from a central point of the sixth surface to an outermost edge of the sixth surface; and Y is a distance from the outermost edge of the sixth surface to the optical axis.

Abstract: An image lens, in order from an object side to an image side thereof, includes a first lens including a first surface and a second surface, a second lens including a third surface and a fourth surface, a third lens including a fifth surface and a sixth surface, a fourth lens including a seventh surface and a eighth surface, and an image plane. The image lens satisfies the following formulas: D/TTL>1.11; D/L>1.13; Z/Y>0.076; wherein D is the maximum image diameter of the image plane; TTL is a total length of the image lens; L is a distance from an outermost edge of the eighth surface to an optical axis of the image lens; Z is a distance from a central point of the sixth surface to an outermost edge of the sixth surface; and Y is a distance from the outermost edge of the sixth surface to the optical axis.

Abstract: An image lens module includes a first lens, a second lens, a third lens, and an image plane and satisfies: FB/TTL>0.16, G1R1/F1>1.04, and D1/D2<4.47. FB is a distance between an apex of an image-side surface of the third lens and the image plane. TTL is a distance between an object-side surface of the first lens and the image plane. G1R2 is a curvature radius of an image-side surface of the first lens. F1 is focal length of the first lens. D1 is a distance between the end of the effective diameter of an image-side surface of the second lens and an optical axis of the image lens module in a direction perpendicular to the optical axis. D2 is a distance between the end of the effective diameter of the image-side surface of the second lens and an apex of the image-side surface of the second lens along the optical axis.

Abstract: An optical touch system includes a display screen having a contact surface, two infrared light sources emitting infrared light to cover the contact surface, two linear infrared sensors each having a sensing surface with a lengthwise direction thereof parallel to the contact surface, a processor, and a controller. Each linear infrared sensor captures an image of the contact surface with an infrared portion representing a touch area of a contact object, the image has an aspect ratio greater than that of the contact surface. The processor determines the touch location of the contact object based on the aspect ratios of the image and the contact surface, the location of the infrared portion on the image, the area of the infrared portion and the area of the touch portion of the contact object. The controller executes an instruction according to the determined location of the contact object.

Abstract: An optical touch system includes a display screen having a contact surface, two infrared light sources emitting infrared light to cover the contact surface, two linear infrared sensors each having a sensing surface with a lengthwise direction thereof parallel to the contact surface, a processor, and a controller. Each linear infrared sensor captures an image of the contact surface with an infrared portion representing a touch area of a contact object, the image has an aspect ratio greater than that of the contact surface. The processor determines the touch location of the contact object based on the aspect ratios of the image and the contact surface, the location of the infrared portion on the image, the area of the infrared portion and the area of the touch portion of the contact object. The controller executes an instruction according to the determined location of the contact object.

Abstract: An image lens includes a first lens and a second lens. The first lens includes a first surface and a second surface. The second lens includes a third surface and a fourth surface. The image lens satisfies: FB/TTL>0.38; R11/F1>2.23; Z/Y>0.11; Z/T<0.42; R23/F2<R12/F2<R24/F2. FB is a distance between the fourth surface and an image plane, TTL is a total length of the image lens, Z is a distance from a central point of the fourth surface to an outer edge of the fourth surface along an optical axis of the image lens, Y is a distance from the central point of the fourth surface to the edge of the fourth surface along a direction perpendicular to the optical axis, T is a thickness of the second lens, R23, R24, R11 and R12 are curvature radiuses of the third, fourth, first and second surfaces, F2 is a focal length of the second lens.

Abstract: An image lens module includes a first lens, a second lens, a third lens, and an image plane and satisfies: FB/TTL>0.16, G1R1/F1>1.04, and D1/D2<4.47. FB is a distance between an apex of an image-side surface of the third lens and the image plane. F1 is a distance between an object-side surface of the first lens and the image plane. G1R2 is a curvature radius of an image-side surface of the first lens. F1 is focal length of the first lens. D1 is a distance between the end of the effective diameter of an image-side surface of the second lens and an optical axis of the image lens module in a direction perpendicular to the optical axis. D2 is a distance between the end of the effective diameter of the image-side surface of the second lens and an apex of the image-side surface of the second lens along the optical axis.

Abstract: An optical touch system includes a display screen having a contact surface, an infrared light source emitting infrared light to cover the contact surface, a linear infrared sensor having a sensing surface with a lengthwise direction thereof parallel to the contact surface, a processor, and a controller. The linear infrared sensor captures an image of the contact surface with an infrared portion representing a touch area of a contact object, the image having an aspect ratio greater than that of the contact surface. The processor determines the touch location of the contact object based on the aspect ratios of the image and the contact surface, the location of the infrared portion on the image, the area of the infrared portion and the area of the touch portion of the contact object on the contact surface. The controller executes an instruction according to the determined location of the contact object.

Abstract: An image lens, in the order from the object side to the image side thereof, includes a first lens including a first surface and a second surface, a second lens including a third surface and a fourth surface, a third lens including a fifth surface and a sixth surface, a fourth lens including a seventh surface and a eighth surface, a fifth lens including a ninth surface and a tenth surface, and an image plane. The image lens satisfies the following formulas: (1) D/TTL>0.94; (2) D/L>1.21; wherein D is the maximum image diameter of the image plane; TTL is a total length of the image lens, and L is a distance from an outmost edge of the tenth surface to an optical axis of the image lens along a direction perpendicular to the optical axis.

Abstract: An image lens includes a first lens and a second lens. The first lens includes a first and a second surfaces. The second lens includes a third and a fourth surfaces. The image lens satisfies: FB/TTL>0.23; G1R1/F1>1.93; Z/Y>0.27; Z/T<0.89; G2R1/F2<G2R2/F2<G1R2/F2, FB is a distance between the fourth surface and the image plane, TTL is a total length of the image lens, Z is a distance from a central point of the fourth surface to the fourth surface along the optical axis, Y is a distance from the central point of the fourth surface to an edge of the fourth surface along a direction perpendicular to the optical axis, T is a thickness of the second lens, G2R1, G2R2 and G1R2 are curvature radiuses of the third, fourth and second surfaces, F2 is a focal length of the second lens.

Abstract: An aircraft exploration system includes an unmanned aircraft, a remote control, a communication processer and a data processing terminal. The an unmanned aircraft equipped with an MCU module, an image module, a first transceiver module and a GPS module, the above-mentioned modules are electronically connected to the MCU module. The unmanned aircraft is controlled by the remote control to fly. The data processing terminal is electronically connected to the communication processer, the GPS module senses the position signals of the unmanned aircraft and sends position signals to the data processing terminal, and the data processing terminal displays a map of an environment surrounding the unmanned aircraft promptly and in real time due to the positioning signals via internet.

Abstract: A camera module includes a lens barrel and a lens holder. The lens barrel includes a first tubular section and a second tubular section. The first tubular section extends from an end of the second tubular section. The outer diameter of the first tubular section tapers in a direction from the image side to the object side of the lens barrel. The lens holder includes a third tubular section and a fourth tubular section. The third tubular section extends from an end of the fourth tubular section. The outer diameter of the third tubular section tapers in a direction from an image side to an object side of the third tubular section. The lens barrel threadedly inserts into the lens holder and is held by the lens holder.

Abstract: A glass filter assembly includes a circular glass substrate, an annular first anti-fragility layer, and a second anti-fragility layer. The circular glass substrate includes a first surface and a second surface opposite to the first surface. The first anti-fragility layer is concentrically adhered to the first surface. The outer diameter of the first anti-fragility layer is greater than or equal to the diameter of the circular glass substrate while the inner diameter of the first anti-fragility layer is smaller than the diameter of the circular glass substrate. The second anti-fragility layer is concentrically adhered to the second surface. The outer diameter of the second anti-fragility layer is greater than the diameter of the circular glass substrate while the inner diameter of the second anti-fragility layer is smaller than the diameter of the circular glass substrate.

Abstract: A lens system includes a first, a second and a third lenses, and an image plane. The lens system satisfies the formulae: FB/TTL>0.30; G1R2/F1>19.54; and D1/D2<1.62. FB denotes a distance between a nearest point of an image-side surface of the third lens relative to the image plane and the image plane, TTL denotes the total track length of the lens system, G1R2 denotes the curvature radius of the vertex of an image-side surface of the first lens, F1 denotes the focal length of the first lens. D1 denotes an orthogonal distance between a farthest point of an image-side surface of the second lens relative to an optical axis of the lens system and a central point of the image-side surface of the second lens, along a direction substantially perpendicular to the optical axis. D2 denotes an orthogonal distance between the farthest point and the central point along the optical axis.

Abstract: A lens system includes a first to fifth lenses. The second and fifth lenses have negative refractive power and the others have positive refractive power. The lens system satisfies: D/TTL>1.05; Z/Y>0; G3R1/F3>G1R1/F1>0; G1R2/F1<G3R2/F3<0; and G5R1/F5<G5R2/F5<0, where D is the diameter of the optical images of the lens system, TTL is the total length of the lens system, Z is the distance between the outer periphery of an image-side surface of the fourth lens to the center of an object-side surface of the fourth lens, Y is the distance between the outer periphery of the fourth lens to the center of the fourth lens, G1R1, G2R2, G3R1, G3R2, G5R1 G5R2 are the radii of curvature of the object-side and image-side surfaces of the first, third, fifth lenses, respectively, and F1, F3, F5 are focal lengths of the first, third, fifth lenses, respectively.

Abstract: A lens system includes a first lens with negative refraction power, and a second lens with positive refraction power. The first lens includes a surface facing the image side having an optical portion. The lens system satisfies the formulas: (1) Y/Z<1.10;(2) G1R1/F1<?3.10; and (3) G2R2/F2>1.49, wherein Y is a distance between an end point of the optical portion and a center point of the optical portion along a direction perpendicular an optical axis, Z is a distance between the end point of the optical portion and the center point of the optical portion along the optical axis, F1 and F2 are the focal lengths of the first and second lenses, respectively, G1R1 and G2R2 respectively denote the radius of curvatures of a surface of the first lens facing the object side and another surface of the second lens facing the image side.

Abstract: An image lens includes a first lens and a second lens. The first lens includes a first surface and a second surface. The second lens includes a third surface and a fourth surface. The image lens satisfies: FB/TTL>0.38; R11/F1>2.23; Z/Y>0.11; Z/T<0.42; R23/F2<R12/F2<R24/F2. FB is a distance between the fourth surface and an image plane, TTL is a total length of the image lens, Z is a distance from a central point of the fourth surface to an outer edge of the fourth surface along an optical axis of the image lens, Y is a distance from the central point of the fourth surface to the edge of the fourth surface along a direction perpendicular to the optical axis, T is a thickness of the second lens, R23, R24, R11 and R12 are curvature radiuses of the third, fourth, first and second surfaces, F2 is a focal length of the second lens.

Abstract: A lens system includes a first to fifth lenses. The second and fifth lenses have negative refractive power and the others have positive refractive power. The lens system satisfies: D/TTL>1.05; Z/Y>0; G3R1/F3>G1R1/F1>0; G1R2/F1<G3R2/F3<0; and G5R1/F5<G5R2/F5<0, where D is the diameter of the optical images of the lens system, TTL is the total length of the lens system, Z is the distance between the outer periphery of an image-side surface of the fourth lens to the center of an object-side surface of the fourth lens, Y is the distance between the outer periphery of the fourth lens to the center of the fourth lens, G1R1, G2R2, G3R1, G3R2, G5R1 G5R2 are the radii of curvature of the object-side and image-side surfaces of the first, third, fifth lenses, respectively, and F1, F3, F5 are focal lengths of the first, third, fifth lenses, respectively.