STUDY OF FACSIMILE SCANNING AND RECORDING TECHNIQUES EMPLOYING FIBER OPTICS.
Quarterly rept. no. 1, 15 Jan-15 Mar 62,
IIT RESEARCH INST CHICAGO ILL
Pagination or Media Count:
Facsimile copy can be illuminated and scanned by fiber optics. For diffuse copy the design of the scan and illumination fiber geometry is determined by the desired resolution, separation of fiber ends from the copy and the diameter and numerical aperture of the fibers. For copy in which surface gloss may obscure the base contrast the illumination-scan fiber sheet geometry can be designed to reject the gloss component of surface reflectivity. Expressions which describe the optical properties and the geometric relationship of a generalized combination of fibers and copy resulting in the rejection of the gloss or mirror reflections have been derived. The fiber is fabricated as a single strand which is mechanically assembled into an aligned fiber sheet or some other configuration. Fiber breakage during the assembly of the fiber sheets and the use of a fiber optics component is dependent upon the tensile strength of the fiber. Optical glasses of similar and varied expansion coefficients and softening points were surveyed and a number of combinations chosen for fiber fabrication. Author