Title :
Optical Design of a Line Scanning Laser Ophthalmoscope
Author :
He, Yi ; Shi, GuoHua ; Lu, Jing ; Li, Hao ; Zhang, Yudong
Author_Institution :
Key Lab. on Adaptive Opt., Chengdu, China
Abstract :
The paper describes the optical design of a line scanning laser ophthalmoscope (LSO). A line beam is used to illuminate the retina, meanwhile a linear array sensor is used for imaging the retina. For the Liou & Brennan eye model, we set the pupil diameter to be 2 mm, and the field of view is 6 degree on retinal plane (about 1.8 mm × 1.8 mm). ZEMAX optical modeling analysis shows that the main optical system achieves diffraction limit through the entire scanning angle. The magnification of the optical system is about 7 times, and the transverse resolution is less than 10 μm. For our 512 × 512 pixels imaging mode (the sensor line frequency is 98 KHZ), the frame frequency can achieve 200 fps.
Keywords :
biomedical optical imaging; eye; image resolution; image sensors; laser applications in medicine; laser arrays; laser beams; light diffraction; medical image processing; optical design techniques; optical microscopes; sensor arrays; vision; LSO; Liou-Brennan eye model; ZEMAX optical modeling; diffraction limit; field of view; frame frequency; frequency 98 kHz; imaging mode; line beam; line scanning laser ophthalmoscope; linear array sensor; optical design; optical system; pupil diameter; retina imaging; retinal plane; scanning angle; sensor line frequency; size 2 mm; transverse resolution; Adaptive optics; Laser beams; Optical diffraction; Optical imaging; Optical sensors; Retina; LSO; line scanning; optical design;
Conference_Titel :
Industrial Control and Electronics Engineering (ICICEE), 2012 International Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-4673-1450-3
DOI :
10.1109/ICICEE.2012.197
