Abstract: An optical system affixed to an electronic apparatus is provided, including a first optical module, a second optical module, and a third optical module. The first optical module is configured to adjust the moving direction of a first light from a first moving direction to a second moving direction, wherein the first moving direction is not parallel to the second moving direction. The second optical module is configured to receive the first light moving in the second moving direction. The first light reaches the third optical module via the first optical module and the second optical module in sequence. The third optical module includes a first photoelectric converter configured to transform the first light into a first image signal.

Abstract: An optical system affixed to an electronic apparatus is provided, including a first optical module, a second optical module, and a third optical module. The first optical module is configured to adjust the moving direction of a first light from a first moving direction to a second moving direction, wherein the first moving direction is not parallel to the second moving direction. The second optical module is configured to receive the first light moving in the second moving direction. The first light reaches the third optical module via the first optical module and the second optical module in sequence. The third optical module includes a first photoelectric converter configured to transform the first light into a first image signal.

Abstract: An improved receptacle structure for computer hard-disk comprises of a tongue piece and a receptacle slot, wherein the tongue piece is mounted at the rear end of the hard-disk and connected to the circuit board of the hard-disk, with a horizontal flange on one side to be inserted with the receptacle slot and terminal pieces disposed in equal intervals on the upper and the lower sides of the horizontal flange; a plurality of terminal pieces are mounted on the upper and the lower sides of the receptacle slot to contact correspondingly with the upper and the lower terminal pieces on the horizontal flange of the tongue piece mentioned above; the footing terminals extended perpendicularly downwards from the rear end, available for the upper and the lower terminal pieces, of the receptacle slot connect parallelly and correspondingly to the mother board; the assembly of the said tongue piece and the receptacle slot makes the installation of the computer hard-disk more convenient, reduces the cost of the materials re