Patent ID: 7891859

Claim:
A frame comprising: a bottom frame, a plurality of fixing members, and two pre-assembled members, each pre-assembled member comprising an elongated base and a latching portion connected to the elongated base, wherein the pre-assembled members are fixed to the bottom frame with the fixing members, such that optical elements could be stacked together and fixed to the latching portions of the pre-assembled members, one end of the elongated base of each pre-assembled member is connected to a back portion of the latching portion; each pre-assembled member further comprises a side plate perpendicularly extending from an opposite end of the elongated base outwards; the latching portion, the elongated base, and the side plate cooperatively define a fixing chamber for receiving the fixing members, and each pre-assembled member further comprises a protruding column protruded out from the elongated base, and a pin defined at the top of the protruding column.