A compact adaptive optics scanning laser ophthalmoscope with high-efficiency wavefront correction using dual liquid crystal on silicon - spatial light modulator

Futoshi Hirose; Koji Nozato; Ken-ichi Saito; Yasuyuki Numajiri

doi:10.1117/12.873671

11 February 2011 A compact adaptive optics scanning laser ophthalmoscope with high-efficiency wavefront correction using dual liquid crystal on silicon - spatial light modulator

Futoshi Hirose, Koji Nozato, Ken-ichi Saito, Yasuyuki Numajiri

Author Affiliations +

Proceedings Volume 7885, Ophthalmic Technologies XXI; 788515 (2011) https://doi.org/10.1117/12.873671
Event: SPIE BiOS, 2011, San Francisco, California, United States

Abstract

This paper describes a compact adaptive optics scanning laser ophthalmoscope (AO-SLO) for high-resolution retinal imaging. The key features of this system are: (1) incorporation of a dual liquid crystal on silicon spatial light modulator (LCOS-SLM) as a wavefront compensation device and (2) sequential processing of aberration measurement/compensation and SLO imaging. The dual LCOS-SLM can compensate higher order aberration with high stabilization and realizes high-efficiency wavefront correction without polarization dependence. The sequential processing can fully utilize the power of the light to a retina only for the imaging, so the system produces high-contrast SLO images. The sequential processing also enables the use of lenses in ocular optics, giving a compact optical system with focus correction lenses for an eye with high reflective error. The optical system occupies only 500 mm x 370 mm, which is achieved by axially symmetric aspherical mirrors arranged off-axis and lenses in ocular optics. With this system, it is possible to observe photoreceptors at the parafoveal region of human healthy subjects at 32 or 64 frames per second.

Citation Download Citation

Futoshi Hirose, Koji Nozato, Ken-ichi Saito, and Yasuyuki Numajiri "A compact adaptive optics scanning laser ophthalmoscope with high-efficiency wavefront correction using dual liquid crystal on silicon - spatial light modulator", Proc. SPIE 7885, Ophthalmic Technologies XXI, 788515 (11 February 2011); https://doi.org/10.1117/12.873671

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