Telegraphy – Systems – Automatic
Patent
1978-05-30
1980-10-28
Robinson, Thomas A.
Telegraphy
Systems
Automatic
346 76L, 350285, 358285, H04L 1534, H04N 104
Patent
active
042309026
ABSTRACT:
A laser printing system having a plurality of modules is provided wherein one of the modules comprises a laser, modulator and part of the system optics, the light output from the module being directed to a rotating scanner. The components in the module are secured to a common base member to minimize relative movement between the components, the alignment between the output laser beam and a cylindrical lens, the cylindrical lens being one element of the module optics, thereby being substantially maintained so that the energy distribution of the laser beam focused onto a recording medium across a scan line is maintained at its optimum value. If the laser or other component in the module becomes defective, the module is removed and replaced with a similar module, the critical alignment between the laser beam and the cylindrical lens thereby being maintained. The module, when replaced, fits into a corresponding mating portion of the laser printing system so that the module output beam retains its relative alignment with system components external to the module.
REFERENCES:
patent: 3966327 (1976-06-01), Hanson
patent: 4032743 (1977-06-01), Erbach et al.
De Benedictis Leonard C.
Hug William F.
Keschner Irving
Robinson Thomas A.
Xerox Corporation
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