Scanning system and method of scanning
First Claim
1. A method of exposing radiation sensitive means to a beam of radiation, the method comprising causing first and second pivoted radiation guides to oscillate with a predetermined phase relationship;
- and causing a single beam of radiation to impinge alternately on said first and said second radiation guides, whereby said radiation guides cause said impinging radiation to impinge on and scan across said radiation sensitive means in response to oscillation of said radiation guides.
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Accused Products
Abstract
A method and apparatus for exposing a pair of radiation sensitive surfaces to a beam of optical radiation is described. The apparatus comprises a support (20) for supporting the radiation sensitive surfaces which may be provided on opposite sides of an identification card. A laser (1) provides a laser beam which impinges on a pair of resonant scanners (10,11) which cause radiation impinging on their respective mirrors to be reflected onto opposite surfaces of the identification card. A control system (103) causes the mirrors of the scanners (10,11) to oscillate in quadrature. The laser beam passes through an A/O modulator (4) responsive to signals from the control system (103) to cause radiation to impinge alternately on one or the other of the scanners (10,11). The scanners (10,11) are arranged such that when the beam of radiation impinges on a scanner, the radiation is caused to impinge on and to scan across the respective surface of the identification card (19) supported by the support (20), in response to oscillation of the scanner.
29 Citations
19 Claims
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1. A method of exposing radiation sensitive means to a beam of radiation, the method comprising causing first and second pivoted radiation guides to oscillate with a predetermined phase relationship;
- and causing a single beam of radiation to impinge alternately on said first and said second radiation guides, whereby said radiation guides cause said impinging radiation to impinge on and scan across said radiation sensitive means in response to oscillation of said radiation guides.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An exposing system comprising a support for supporting radiation sensitive means;
- a radiation beam source;
a pair of radiation guide assemblies having first and second radiation guides respectively and control means for oscillating said guides, said control means being controlled in use to cause said radiation guides to oscillate with a predetermined phase relationship;
a control system; and
directing means responsive to signals from said control system to cause a single radiation beam from said radiation beam source to impinge alternately on said first and said second radiation guides, whereby when said beam of radiation impinges on a radiation guide, said radiation is caused to impinge on and scan across radiation sensitive means supported by said support, in response to oscillation of said guide. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- a radiation beam source;
Specification