25 March 1999 Optical design and implementation of a variable-pitch dot matrix writer
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The fundamental thinking and the optical implementation of an innovative dot matrix writer that can generate image grating pixels of arbitrary grating pitch and grating orientations on a photoresist plate is presented. In this newly developed system, the incident laser beam is split by a beamsplitter to become two incident laser beams. The two coherent light beams are then focused onto a photoresist plate by an especially designed focusing lens. The grating pitch of the grating pixel formed on the photoresist plate can be varied on-the-fly by translating a set of stages to change the distance of the two coherent light beams before impinging on the focusing lens. Moving a lens on the incident light path to change the convergent angle of the incident light beams can change the spot size of this system. As the grating pixels generated by this dot matrix writer are able to have spot sizes, grating orientation, and grating pitch completely specified by the designer, the image effect by this type of dot matrix writer can exert a pre-specified color at each specific viewing angle. Diffractive images with various visual effects and applications that can be created by using this newly invented system are examined.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Chih-Kung Lee, Chi-Tang Jeffrey Hsieh, Jeremy W.J. Wu, Julie T. Lee, "Optical design and implementation of a variable-pitch dot matrix writer", Proc. SPIE 3637, Practical Holography XIII, (25 March 1999); doi: 10.1117/12.343763; https://doi.org/10.1117/12.343763


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