Design of a curved-target ultrashort throw projector based on predistortion and illumination precorrection.
Appl Opt
; 62(29): 7837-7843, 2023 Oct 10.
Article
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| MEDLINE
| ID: mdl-37855494
ABSTRACT
Ultrashort throw projector (UTP) technology has been a challenging research focus in the fields of large field of view and short-distance projection. In this paper, we propose a design method for a curved-target UTP based on image precorrection. A predistortion method (<1p i x e l) using a radial basis function is presented to effectively correct irregular distortion. A grayscale precorrection method is used to address uneven illumination distribution. We provide a UTP design example and verify the correction methods using two different curved targets (aspherical and freeform), demonstrating effective distortion correction (<1%) and illumination uniformity (>90%). The structure similarity index measure for the projection images shows close or greater than 0.9 correlation.
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Appl Opt
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2023
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Article