Abstract: A pico projector of the invention includes an illuminating module, an imaging module, and a lens-focusing module. The illuminating module is configured to emit light. The imaging module is configured to add picture messages into the light to generate an image and project the image. The lens-focusing module is configured to regulate a focal length of the imaging module.

Abstract: A lens assembly includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, all of which are arranged in sequence from an object side to an image side along an optical axis. The first lens is with negative refractive power. The second, third, fourth and sixth lens are with refractive power. The fifth lens is with positive refractive power. The lens assembly satisfies: 0.078?BFL/TTL?0.4, 0.01?f/TTL?0.61, (Nd1+Nd2+Nd3+Nd4+Nd5+Nd6)/6<(Nd2+Nd3)/2 wherein BFL is a distance from an image side surface of the sixth lens to an image plane along the optical axis, TTL is a distance from the convex surface of the first lens to the image plane along the optical axis, f is an effective focal length of the lens assembly, and Nd1, Nd2, Nd3, Nd4, Nd5 and Nd6 are indexes of refraction of the first, second, third, fourth, fifth and sixth lenses.

Abstract: A sight and an operating method thereof are provided. The sight includes a light source, a motion sensor, and a control unit. The motion sensor is configured to detect a change of a motion direction of the sight and generate a detection signal based on the change of the motion direction. The control unit is configured to control brightness of the light source and determine whether the sight enters a sleep mode, wherein the control unit wakes up the sight from the sleep mode when the control unit receives the detection signal.

Abstract: A sight structure of the invention includes a seat; a lens mounted to the seat and comprising a surface; a plurality of electrodes disposed on the surface to form an aiming pattern and connected to a power source; and a light emitting member disposed on the surface and connected to the electrodes, wherein the light emitting member emits light when the power source provides power for the electrodes.

Abstract: A scan device includes a main body, a transparent glass plate, a carrier, a light source, a reflecting unit, a lens and an image sensor. Light is emitted from the light source through the transparent glass plate to a document. Then, the light is reflected by the document and passes through the transparent glass plate to reach the reflecting unit. The light is reflected by the first mirror to travel to the second mirror and the third mirror and reflected by the second and third mirrors for several times, then reaches the fourth mirror and fifth mirror to passes through the lens, and forms an image on the image sensor.

Abstract: A portable scanning device includes a docking seat, a handheld scanner, a positioning unit, a document-feeding unit and a motor. The docking seat has a receiving groove, a feeding groove, a document inlet, and a document outlet. The positioning unit is mounted to the docking seat for retaining the handheld scanner in the receiving groove. The document-feeding unit includes a loading subunit for conveying a document from the feeding groove to the handheld scanner through the document inlet, a discharging subunit for discharging the document via the document outlet, and a regulating subunit for continuous document-feeding action when a plurality of the documents are scanned. The motor is for actuating movement of the document-feeding unit.

Abstract: A wide-angle lens assembly includes a first lens, a second lens, a third lens, a first stop, a fourth lens, a fifth lens and a sixth lens, all of which are arranged in sequence from an object side to an image side along an optical axis. The first lens is with negative refractive power. The second lens is with negative refractive power. The third lens is with positive refractive power. The fourth lens is with positive refractive power. The fifth lens is with negative refractive power. The sixth lens is with positive refractive power. The fifth lens satisfies 16.1?Vd5?23.9, wherein Vd5 is an Abbe number of the fifth lens.

Abstract: A zoom lens includes a driving device, a zooming frame, and a lens group, wherein the driving device has a lens barrel. The zooming frame is located in the lens barrel, and has a body, a first lens holder, and a second lens holder which are pivotally connected to the body. The body is drivable by the driving device to reciprocally move between a first position and a second position. The first lens holder is respectively pivoted between a third position and a fourth position on the body along with the body being moved between the first position and the second position. The second lens holder is pivoted between a fifth position and a sixth position on the body in the same way. The lens group has a first lens sub-group provided on the first lens holder, and a second lens sub-group provided on the second lens holder.

Abstract: The sight includes a main body, a regulating bolt movably joined to the main body, a securing bolt fixed to the regulating bolt, a regulating cover covering the regulating bolt and movable between a first position and a second position with respect to the regulating bolt, a first magnet disposed on the regulating cover, and a second magnet disposed on the regulating bolt and corresponding to the first magnet. The regulating cover is movable with respect to the regulating bolt when the regulating cover moves away from the second position. The regulating cover abuts the securing bolt and is rotatable with respect to the regulating bolt when the regulating cover moves to the first position. The regulating cover engages the regulating bolt when the regulating cover moves to the second position. The regulating cover is maintained in the second position through attraction of the first magnet and the second magnet.

Abstract: A sight includes a main body including a focus lens system and an erecting lens system; a first adjusting member disposed in the main body and configured to move the focus lens system along the optical axis; a second adjusting member disposed in the main body and configured to move the erecting lens system in a first direction which is perpendicular to the optical axis; a focus adjusting module disposed in the main body and configured to drive the first adjusting member so as to move the focus lens system along the optical axis; and a first adjusting module detachably joined to the focus adjusting module and configured to drive the second adjusting member so as to move the erecting lens system in the first direction.

Abstract: A projection lens includes a first lens group and a second lens group, all of which are arranged in sequence from a projection side to an image source side along an optical axis. The first lens group is with negative refractive power and includes a first lens with negative refractive power. The second lens group is with positive refractive power and includes a second lens, a third lens, a fourth lens and a fifth lens, wherein the second lens is with positive refractive power, the third lens is with negative refractive power, the fourth lens is a concave-convex lens with positive refractive power and the fifth lens is with positive refractive power. The first lens group and the second lens group satisfy ?1.8<f1/f2<?1.42, wherein f1 is an effective focal length of the first lens group and f2 is an effective focal length of the second lens group.

Abstract: A pico projector system and an additional thermal dissipating method for the pico projector system are provided. The pico projector system includes a pico projector main body and a thermal dissipating module. The additional thermal dissipating method includes the steps of thermally dissipating the pico projector main body; externally connecting the thermal dissipating module to the pico projector main body; and thermally dissipating the pico projector main body by the thermal dissipating module.

Abstract: An embodiment of the invention provides a float capable of mounting a camera device including an antenna to enable underwater photography with less limitation to the arrangement of the antenna. The float includes a recess 3 acting as a first camera device mounting section at a side to be immersed in water. The first camera device mounting section is provided for mounting a first camera device 101. The float has buoyancy to provide a protruding section 5 protruding upwardly from water's surface A when the float is floating on the water's surface A in a state of mounting the first camera device 101 in the recess 3. The float, including the protruding section 5, between the protruding section 5 and an antenna 104 equipped on the first camera device 101 mounted in the recess 3 is composed of a material capable of transmitting a radio wave.

Abstract: An optical device includes a first lens frame bearing a first lens set and having a plurality of rods, a first cam barrel rotating to move the first lens frame along a first axis, a second lens frame bearing a second lens set and having a plurality of holes corresponding to the rods, and a second cam barrel rotatably disposed around the first cam barrel to rotate the first cam barrel and move the second lens frame along a second axis parallel to the first axis, wherein the first axis is substantially coincident with the second axis with the rods inserted into the holes.

Abstract: An image capture device and a converter lens assembly thereof are provided. The image capture device includes a mobile phone and the converter lens assembly wherein the converter lens assembly is connected to the mobile phone. The converter lens assembly includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens, all of which are arranged in sequence from an object side to an image side along an optical axis. The first lens is with positive refractive power. The fourth lens is with positive refractive power. The converter lens assembly satisfies the condition: 1<|f1/f2|<2 and/or the condition: 1<|f345/f2|<2, wherein f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f345 is the effective focal length of the combination of the third lens, the fourth lens and the fifth lens.

Abstract: A projection lens includes a first lens group, a second lens group and a third lens group, all of which are arranged in sequence from an projection side to an image source side along an optical axis. The first lens group is with negative refractive power and includes four lenses. The second lens group is with positive refractive power and includes two lenses. The third lens group is with positive refractive power and includes a stop and six lenses.

Abstract: A wide-angle lens includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens, all of which are arranged in sequence from an object side to an image side along an optical axis. The first lens is with negative refractive power and includes a concave surface facing the image side. The second lens is a biconcave lens with negative refractive power. The third lens is a biconvex lens with positive refractive power. The fourth lens is a biconvex lens with positive refractive power. The fifth lens is with negative refractive power and includes a concave surface facing the object side.

Abstract: An optical device includes a base; an image sensor disposed on the base; an outer frame connected to the base and having a flat surface; an inner frame having a protrusion and movable between a first position and a second position with respect to the base; and a lens group disposed on the inner frame and having an optical axis, wherein the protrusion abuts the flat surface and the optical axis extends through the image sensor when the inner frame moves to the first position, and the inner frame is accommodated in a space when the inner frame moves to the second position.

Abstract: A lens device includes a first barrel surrounding an optical axis, a first frame coupled rotatably to the first barrel and surrounding a first axis, and an adjusting unit. The adjusting unit has an adjusting groove formed in one of the first barrel and the first frame, and having adjusting groove segments, one of which extends spirally. The adjusting unit further has adjusting blocks formed on the other one of the first barrel and the first frame and engaging respectively and slidably the adjusting grooves. The first frame is rotatable relative to the first barrel to adjust the first axis relative to the optical axis.

Abstract: A sight and methods of operation thereof are provided. In some embodiments, an image is captured via an image capture unit, and a center position is calculated according to the positions of at least three impact points in the image, and a predefined view center of a display unit is set to the center position. In some embodiments, an angle of dip of the sight to a plane is detected via a dip angle detector. A predictive impact point is calculated according to the angle of dip and at least one calculation parameter, and an impact point indication is accordingly displayed in the display unit. When the angle of dip is changed, the predictive impact point is recalculated according to the new angle of dip, and the corresponding impact point indication is displayed.