Optics and Precision Engineering, Volume. 18, Issue 2, 281(2010)
Variation of transverse chromatic aberration with displacement of artificial stop and eccentricity based on individual eye model
In order to study the variation of Transverse Chromatic Aberration (TCA) with external factors, such as the displacement of artificial pinhole from the visual axis and eccentricity,this paper constructs individual eye models to investigate the characteristic of TCA. The angle between visual axis and optical axis is calculated from the cornea data for eight eyes. According to the measurements of the corneal surfaces, optical axis lengths, wavefront aberrations and the angle obtained from calculation, the individual eye models involving the angle between visual axis and optical axis are constructed with ZEMAX software. The constructed eye models are then used to investigate the variations of TCA at the fovea with the displacement of artificial pinhole from the visual axis and to analyze the variation of TCA with the eccentricity over spectra from 420 nm to 700 nm. The result shows that the TCA increases with the displacement linearly at an average ratio of 5.7(′)/mm, but there are some differences among the eight eyes over the range from 5.46(′)/mm to 5.95(′)/mm. Across the field of view of 20° both at nasal and temporal,the TCA increases with the eccentricity at an average ratio of 0.36′/(°) for the eight eyes over the range from 0.32(′)/(°) to 0.44(′)/(°).Furthermore, the variation of TCA is slower at the end of long wavelength than that at the end of short wavelength. It is concluded that the influence of TCA should be considered in the designs of retina imaging systems and modern head-mounted display systems.
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WANG Zhao-qi, ZHANG Mei, WANG Yan, ZUO Tong. Variation of transverse chromatic aberration with displacement of artificial stop and eccentricity based on individual eye model[J]. Optics and Precision Engineering, 2010, 18(2): 281
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Received: Jun. 30, 2009
Accepted: --
Published Online: Aug. 31, 2010
The Author Email: Mei ZHANG (changenk@163.com)
CSTR:32186.14.