Abstract: The present invention provides an improved structure of laser sight, which comprises a sight body, a block, a displacement adjusting device, and a switch. The block can be disposed flexibly to locations on one side of the sight body for fitting different type of firearms. The displacement adjusting device can control the location of a laser module inside the laser sight for changing the location of light emission of the laser module and modifying the location of the laser module. The switch is used for controlling the laser module and improving the convenience in control. By using the structure described above, the laser sight will have better practicability and sighting performance.

Abstract: A lens module with adjustable magnification is installed in a scanner. The lens module can be used to collect and focus a scanning light beam to form an image onto at least one optical sensing device, which may be replaceable. The lens module includes a primary lens and at least one correction lens. The correction lens is with respect to the size of the optical sensing device, such as the total length of the effective pixels, and is installed at a location in front of the light collection end or between the image output end and the optical sensing device. This allows the size of the image focused by lens module to match with the size of the optical sensing device, so that the image can be captured by the optical sensing device.

Abstract: An optical path device composed of four pieces of reflected mirrors is disclosed. In the optical path device, after being reflected many times between a set of two parallel mirrors, an incident light not perpendicular to the surface of the original document is turned by an optical path turning mirror to enter the parallel mirrors set again and reflected many times, and then the incident light is reflected into a lens and is imaged on a charge coupled device (CCD). The optical path device can limit the optical path between the parallel mirrors set effectively, thereby decreasing the volume of a chassis.

Abstract: A linear guiding apparatus at least has a shaft and a shaft holding apparatus. The shaft holding apparatus is adapted to slide along the shaft. The shaft holding apparatus includes a body, an elastic member and an adjusting member. The body has a V-shape supporting surface, wherein the V-shape supporting surface is along the axis direction of the shaft and supports on outer edge of the shaft. The elastic member is mounted on the body, wherein the elastic member is elastically contacted the outer edge of the shaft, and the shaft is clipped between the elastic member and the V-shape supporting surface. The adjusting member is mounted on the body and contacted the elastic member, wherein the adjusting member is utilized to adjust the position of the elastic member. Therefore, a shaft of any diameter can be clipped between the elastic member and the V-shape supporting surface.

Abstract: A method and system for scanning comprises rotating a scanning chassis of an optical scanner to create an acute angle between the scan line and a scanning direction, such that the scanning chassis has two ends, and moving the scanning chassis in the scanning direction and with the acute angle between the scan line and the scanning direction, both two ends of the scanning chassis being moved in the scanning direction, while one of the two ends is moved more slowly than the other one so that the scanning chassis is made to be rotated with the acute angle.

Abstract: A linear guiding apparatus at least has a shaft and a shaft holding apparatus. The shaft holding apparatus is adapted to slide along the shaft. The shaft holding apparatus includes a body, an elastic member and an adjusting member. The body has a V-shape supporting surface, wherein the V-shape supporting surface is along the axis direction of the shaft and supports on outer edge of the shaft. The elastic member is mounted on the body, wherein the elastic member is elastically contacted the outer edge of the shaft, and the shaft is clipped between the elastic member and the V-shape supporting surface. The adjusting member is mounted on the body and contacted the elastic member, wherein the adjusting member is utilized to adjust the position of the elastic member. Therefore, a shaft of any diameter can be clipped between the elastic member and the V-shape supporting surface.

Abstract: A guiding apparatus for a scanner may comprise a V-shaped supporting surface capable of supporting a body on a shaft, wherein the body comprises optical components. The guiding apparatus may also comprise an elastic member coupled to the body and capable of contacting the shaft and an adjusting member capable of adjusting the position of the elastic member.

Abstract: A light-emitting device includes a light-emitting component and a lens. The lens includes a bottom surface, a first reflecting surface, a second reflecting surface, and a refracting surface such that light entering the lens through the bottom surface and directly incident on the first reflecting surface is reflected from the first reflecting surface to the second reflecting surface, is subsequently reflected from the second reflecting surface to the refracting surface, and is then refracted from the refracting surface to exit the lens, and that light entering the lens through the bottom surface and directly incident on the second reflecting surface is reflected from the second reflecting surface to the refracting surface, and is then refracted from the refracting surface to exit the lens.

Abstract: An optical path device composed of four pieces of reflected mirrors is disclosed. In the optical path device, after being reflected many times between a set of two parallel mirrors, an incident light not perpendicular to the surface of the original document is turned by an optical path turning mirror to enter the parallel mirrors set again and reflected many times, and then the incident light is reflected into a lens and is imaged on a charge coupled device (CCD). The optical path device can limit the optical path between the parallel mirrors set effectively, thereby decreasing the volume of a chassis.

Abstract: A scan device and a method for enhancing the life of the same are provided. The scan device comprises a scan chassis, a random selecting device, a brightness judging device and a chart. There are many lamps in the scan chassis, and each one of the lamps can provide a light with a predetermined brightness to the document. The random selecting device, which can randomly choose to turn on one of the lamps, is electrically connected to the scan chassis. The brightness judging device is electrically connected to the scan chassis. The chart is disposed above the scan chassis. By turning on one of the lamps randomly, the life of the scan device is enhanced. After a lamp fails, some or all of the other lamps are turned on so as to obtain a light with enough brightness and to further enhance the life of the scan device.

Abstract: A linear guiding apparatus at least has a shaft and a shaft holding apparatus. The shaft holding apparatus is adapted to slide along the shaft. The shaft holding apparatus includes a body, an elastic member and an adjusting member. The body has a V-shape supporting surface, wherein the V-shape supporting surface is along the axis direction of the shaft and supports on outer edge of the shaft. The elastic member is mounted on the body, wherein the elastic member is elastically contacted the outer edge of the shaft, and the shaft is clipped between the elastic member and the V-shape supporting surface. The adjusting member is mounted on the body and contacted the elastic member, wherein the adjusting member is utilized to adjust the position of the elastic member. Therefore, a shaft of any diameter can be clipped between the elastic member and the V-shape supporting surface.

Abstract: A lens module with adjustable magnification is installed in a scanner. The lens module can be used to collect and focus a scanning light beam to form an image onto at least one optical sensing device, which may be replaceable. The lens module includes a primary lens and at least one correction lens. The correction lens is with respect to the size of the optical sensing device, such as the total length of the effective pixels, and is installed at a location in front of the light collection end or between the image output end and the optical sensing device. This allows the size of the image focused by lens module to match with the size of the optical sensing device, so that the image can be captured by the optical sensing device.

Abstract: A method for changing a scanning resolution is fitted to an optical scanner having a scanning chassis. The scanning chassis scans based on a scan line and moves in a scanning direction. The method comprises two steps, wherein Step 1 is to rotating the scanning chassis to create an acute angle between the scan line and the scanning direction, and Step 2 is moving the scanning chassis in the scanning direction and with the acute angle between the scan line and the scanning direction.