Abstract: An expansion card retention apparatus includes a rear panel (50), first and second retention brackets (10, 30), and a side panel (59). The rear panel defines a number of expansion slots (52) for receiving expansion cards (60) therein respectively, an opening, and a pair of hook openings adjoining the opening. The first retention bracket is rotatable in the opening between first and second positions, and includes a pair of hooks (16). The second retention bracket defines a number of flexible tongues (311). The first and second retention brackets are together rotated to the second position such that the flexible tongues engage corresponding expansion cards, and the hooks engages in corresponding hook openings of the rear panel. The side panel is attached to the rear panel for holding the first and second retention brackets in place. The expansion cards are thus securely attached to the rear panel.

Abstract: The present invention provides an optical head with a single or multiple sub-wavelength light beams, which can be used in arenas such as photolithography, optical storage, optical microscopy, to name a few. The present invention includes a transparent substrate, a thin film, and a surface structure with sub-wavelength surface profile. The incident light transmits through the transparent substrate, forms a surface plasma wave along the sub-wavelength aperture located within the thin film, and finally re-emits through spatial coupling with the sub-wavelength profile of the surface structure. As the coupled re-emitting light beam or light beams can maintain the waist less than that of the diffraction limit for a few micrometers out of the surface with sub-wavelength profile in many cases, this invention can have applications ranging from micro or nano manufacturing, metrology, and manipulation by using light beams with waist smaller than the diffraction limit.

Abstract: A mounting apparatus for mounting a data storage device (10) includes a drive bracket (30), and a locking device (40) movably attached to the drive bracket via a screw (50). The data storage device forms a pair of studs (20) at each opposite side plate thereof. The drive bracket includes a first side wall (302) and a second side wall (304) respectively defining first and second guiding grooves (3022,3042) thereof. The first side wall defines a locking hole (3027) beside an end of the first guiding groove. The locking device comprises a position slot (405) for fastening a corresponding stud therein, and a locking tab (4046) engaging in the locking hole of the drive bracket for locking the data storage device in the drive bracket.

Abstract: An expansion card retention apparatus includes a rear panel (50), first and second retention brackets (10, 30), and a side panel (59). The rear panel defines a number of expansion slots (52) for receiving expansion cards (60) therein respectively, an opening, and a pair of hook openings adjoining the opening. The first retention bracket is rotatable in the opening between first and second positions, and includes a pair of hooks (16). The second retention bracket defines a number of flexible tongues (311). The first and second retention brackets are together rotated to the second position such that the flexible tongues engage corresponding expansion cards, and the hooks engages in corresponding hook openings of the rear panel. The side panel is attached to the rear panel for holding the first and second retention brackets in place. The expansion cards are thus securely attached to the rear panel.