Abstract
This work demonstrates a new design of an imaging objective operating in the near-infrared spectral region for vein finder devices. The objective has a simple structure, consisting of 6 elements divided into 2 groups and a long-pass optical filter that allows a near-infrared spectrum to pass through. Due to the filter, the objective only creates images in the 850-940 nm spectral region produced by the infrared illuminator and therefore it can eliminate optical noise in the visible region. The objective image quality is very high, suitable for vein imaging: large aperture, f/2.0, allows creating clear vein images from weak signal reflected from the human skin surface; modulation transfer function (MTF) of 0.5 at a frequency of 72.5 lines/mm; field curvature and image distortion less than 50 μm and 0.1%, respectively. The experimental result indicates that the objective can provide clear vein images when combining with a Sony IMX287 CMOS image sensor.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
