ingle sensor that outputs arrowband multispectral mages

arly stage pressure ulcers and other subcutaneous lesions are early invisible in clinical settings, particularly so for dark igmented skin. An earlier study indicated multispectral imges can enhance the contrast between damaged and normal kin. Although multispectral imaging has matured into a techology with applications in many fields, clinical practitioners n the fields of health care and rehabilitation have generally tayed away from it due to extremely high cost and lack of ortability. Also, other multispectral imaging technologies reuire either multiple exposures or extensive postprocessing. In has long been desirable to reduce the size and weight of ultispectral imaging sensors to facilitate their practical pplications. The effort of developing a hand-held, low-cost, tand-alone, multispectral imaging tool to satisfy the need of linically detecting early stage pressure ulcers stimulates a ew way in architecting the device. Instead of using bulky nd expensive traditional optical filters, e.g., filter wheels, a eneralized Lyot filter, and electrically tunable filter, multipleand pass filters, or the methods of dispersing light, e.g., ptic-acoustic crystals, we report a custom-designed filter osaic that has been successfully fabricated using lithography nd vacuum multilayer film technologies.