Application of radial basis functions to shape description in a dual-element off-axis eyewear display: Field-of-view limit
Previously, it was demonstrated that radial basis functions may be preferred as a free-form shape descriptor for a single-mirror magnifier, justified by a performance increase measured by the MTF, when compared to other conventional descriptions such as multivariate polynomials (e. g., Zernike polynomials or x-y polynomials). The benefit in performance increase can be used to expand the pupil diameter from 8 to 12 mm given a 20 degrees field of view and a 15-mm eye clearance or to increase the field of view. The main contribution in this paper is the investigation of the field-of-view limit in a dual-element magnifier where the free-form mirror is described with radial basis functions. Our main result in this paper is an estimate of the field-of-view limit of the dual-element magnifier to be approximately 25 degrees full-field diagonal, given the specific geometry described in the paper. The impact of the astigmatic node placement in a rectangular image field on the modulation transfer function is also analyzed for the particular dual-element magnifier geometry.
Journal of the Society for Information Display
"Application of radial basis functions to shape description in a dual-element off-axis eyewear display: Field-of-view limit" (2008). Faculty Bibliography 2000s. 168.