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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 16 — Jun. 1, 2010
  • pp: 3127–3139

Projection quality improvement with embedded illumination modulator in projector system

Chu-Ming Cheng and Jyh-Long Chern  »View Author Affiliations

Applied Optics, Vol. 49, Issue 16, pp. 3127-3139 (2010)

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We demonstrate an approach for improving the image quality for a projector system with a shape- programmable pupil, which could be generated by an illumination modular in which a digital micromirror device is embedded. Essentially, the shaped pupil from the illumination modulator is developed with a dynamically programmable approach to provide aberration compensation for the projection system. By analyzing the optical transfer function, the resolution limit of an imaging system with specific defocus, spherical aberration and coma are shown to be improved significantly with a binary-shaped pupil. It is found that the improvement of the projection quality could be characterized by the scale ratio of K = c / D , defined as the ratio between the resolution scale of structured light, c, and the size scale of the aperture stop, D. When K is equal to 0.05, the low-frequency components of the image could be improved, while if K is equal to 0.3, the imaging quality of the image at high-frequency components can be enhanced in a defocused system. Furthermore, as K ranges from 0.05 to 0.3, the imaging performance of the optical contrast could be enhanced in a projector system with large coefficients of defocused, spherical aberration and coma.

© 2010 Optical Society of America

OCIS Codes
(110.2960) Imaging systems : Image analysis
(110.4850) Imaging systems : Optical transfer functions
(220.1000) Optical design and fabrication : Aberration compensation
(110.2945) Imaging systems : Illumination design
(230.4685) Optical devices : Optical microelectromechanical devices

ToC Category:
Integrated Optics

Original Manuscript: February 10, 2010
Revised Manuscript: April 18, 2010
Manuscript Accepted: April 20, 2010
Published: May 31, 2010

Chu-Ming Cheng and Jyh-Long Chern, "Projection quality improvement with embedded illumination modulator in projector system," Appl. Opt. 49, 3127-3139 (2010)

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