Optical delay line for coherence imaging

B Elmaanaoui - US Patent 10,782,117, 2020 - Google Patents
An optical coherence tomography (OCT) system comprises an interferometer configured to
generate interference light based on interference between a reference beam and a sample …

Hand-held autonomous visual acuity measurement apparatus and visual acuity measuring method

P Xie, Q Jiang, R Chu, X Zhou, Q Wang… - US Patent …, 2020 - Google Patents
The present invention discloses a hand-held autonomous visual acuity measurement
apparatus and a visual acuity measuring method. The invention comprises a corneal …