TELECENTRIC COLLIMATOR OPTICAL SYSTEM DESIGN FOR PHOTOACOUSTIC SYSTEM

Abstract

Current photoacoustic systems face a technical bottleneck in terms of image resolution at the clinical level. Therefore, various methods in the optical system are proposed for improving resolution while processing acoustic signals. To improve the image resolution, a novel optical system design for a telecentric collimator optical system needs to be developed. The telecentric collimator system with three different cases (zoom 1, zoom 2, and zoom 3) was developed with different focal length variances. The designed telecentric collimator optical system can obtain a telecentric angle of 0.3° and maximum diffraction aberration of less than −0.27%. Therefore, we can conclude that a designed telecentric collimator design can be useful for improving the image resolution of the photoacoustic system at the target surface because the designed collimator optical system can provide a very small telecentric angle variance over a wide range.