FIELD: optical instruments, computer engineering, medical devices, security, criminology devices. SUBSTANCE: device has light guide which input and output surfaces differ in their area. In addition device has optical fibers which are parallel to each other and have constant diameter. One or two surfaces are inclined with respect to plane which is perpendicular to optical axis of fiber. EFFECT: increased contrast, increased resolution. 4 dwg, 1 tbl
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Authors
Dates
1997-06-20—Published
1995-01-30—Filed