The current trend toward higher bandwidths, finer resolutions, and the desire for dry rapid film processing will require new approaches toward scanning and recording of imagery. This paper will first discuss present technology in high bandwidth, high resolution laser recording. These devices can achieve resolutions up to 200 lp/mm at recording rates up to 340 X 10 6 Hz. It will be shown that little improvement can be expected over today's technology due to fundamental component and physics limitations. The remainder of the paper will describe a new approach that employs integrated optics in the development of modulators and scanners. An integrated optic scanner could conceivably scan light at information rates exceeding 1 gbs (109 bits/sec) without any mechanical motion.
The facsimile camera is an optical-mechanical scanning device which is an attractive candidate for planetary lander imaging systems and has been selected for the Viking/Mars mission because of its light weight, small size, and low power requirement. Other advantages are that it can provide good radiometric and photogrammetric accuracy because the complete field of view is scanned with a single photodetector located on or near the optical axis of the objective lens. In addition, this device has the potential capability of multispectral imaging and spectrometric measurements. This can be implemented without increase in mechanical complexity by the use of interference filters and solid-state detector arrays. Some of these potential capabilities of the facsimile camera have been realized in the Viking Lander Camera design; others are currently being investigated for possible application in future missions. This paper reviews the performance characteristics of the facsimile camera, emphasizing its line-scan sampling process; the design trade offs which are imposed by planetary lander missions, emphasizing those trade offs which define the Viking Lander Camera parameters; and new concepts which are currently being investigated for future planetary lander missions, emphasizing an integrated imagery and spectrometry concept.
A novel data code reader, employing an angle and position insensitive scanning scheme, is described. It combines an image rotator and a translating scanner with a slit aperture to read graphic bar codes, regardless of their orientation or location within the field of view. A simple prototype reader was built and test results are given.
A parallel plate of optical glass was drilled while monitoring the surface deformations and the transmission quality. Strains along the drilled channel surface were found to give rise to elastic displacements in a radial direction. These strains could be relieved without refiguring the plate.
A method of fabricating flexible laps with predictable deflection behavior is described. Rates of deflection versus loading show a nominally linear deformation of 15X with 400-g loading for a 5-cm diam lap.