solar collectors each mirror module includes a flexible membrane stretched over a frame in a manner similar to that of a drum or a trampoline and further includes a silvered glass or plastic mirror for forming an optical reflecting surface the configuration of the optical reflecting surface is variably adjustable to provide for the accurate focusing of the solar energy on a given collector array e g a point or a linear array arrangement the flexible mirror membrane combination is lightweight to facilitate installation and reduce system cost yet structurally strong enough to provide for the precise focusing of the incident solar radiation in a semi rigid reflector system in which unwanted reflector displacement is minimized application_number US 49009083 A description referring to fig1 there is shown a partially cutaway perspective view of a diaphragm mirror module 10 in accordance with the present invention for concentrating radiant solar energy for use with a solar conversion device not shown capable of converting the solar radiation into a more usable form of energy the mirror module 10 includes a structural frame 12 having a plurality of members such as upper and lower frame members 12a 12b structural frame 12 also includes lateral frame members which are not shown in the figure although structural frame 12 and the general configuration of the mirror module 10 of the present invention is described herein as generally rectangular in shape the present invention is.