Abstract: Disclosed is a method and apparatus for the lowcost assembly of precision optical devices utilizing single or multiple bounces. The apparatus makes use of a precision machined alignment platform to support optical mirrors in precise alignment. A low cost holding structure is clamped over the alignment platform to position one of a plurality of connected sections adjacent to the back of each mirror. An adhesive is injected through holes provided in the holding structure adjacent to the back of each mirror. The adhesive bridges each mirror to the holding structure in a position corresponding exactly to the position of the mirrors on the alignment platform, thereby eliminating any need to adjust the mirrors for correct alignment.

Abstract: Disclosed is a linear strip mask for controlling image plane light level distribution in line scan optical imaging systems. The mask is fabricated photographically on a strip of emulsion coated mylar. The photographic image which is recorded on the mylar strip is a pattern of alternating black and clear sections, the pattern of black sections chosen to modify the non-uniform light pattern output by the system's illumination source to obtain uniform image plane illumination. Also disclosed is a line scan optical imaging system utilizing strip masks to compensate for the non-uniform light output along the length of two fluorescent tubes which illuminate the document scan line and the cos.sup.4 drop-off of the imaging system's lens. Light reflected off the document scan line is transmitted via a four bounce folded mirror system and is received by the lens system.