Varifocal lens system for multi-beam laser scanning

Szabolcs B. Tokes

doi:10.1117/12.2308490

26 July 1993 Varifocal lens system for multi-beam laser scanning

Szabolcs B. Tokes

Proceedings Volume 1983, 16th Congress of the International Commission for Optics: Optics as a Key to High Technology; 19831Z (1993) https://doi.org/10.1117/12.2308490
Event: 16th Congress of the International Commission for Optics: Optics as a Key to High Technology, 1993, Budapest, Hungary

Abstract

A change of raster size of multi-beam laser scanner systems (laser-printer, laserplotter, laser image recorder) of fixed overlapping ratio can be produced by a change of focal length of the imaging system. For having a maximal depth of focus (DOF) both for the raster size (beam-axis or vertex imaging) and for the Gaussian beam diameter a telecentric/confocal arrangement is the best solution. In certain cases (e.g.when the whole optics is to be moved along the scanned surface) the length of the optical structure must be fixed. To keep the total length of the optical system constant we decompose the optical system into a telecentric/confocal subsystem and into an afocal subsystem. This decomposition is of high importance as well, if the total imaging system has to be cut into a standing piece and a moving piece. We establish constraints and fundamental rules for dimensioning such a system.

Citation Download Citation

Szabolcs B. Tokes "Varifocal lens system for multi-beam laser scanning", Proc. SPIE 1983, 16th Congress of the International Commission for Optics: Optics as a Key to High Technology, 19831Z (26 July 1993); https://doi.org/10.1117/12.2308490

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