Brandaris 128: A digital 25 million frames per second camera with 128 highly sensitive frames

Abstract

Articles you may be interested inBrandaris 128 ultra-high-speed imaging facility: 10 years of operation, updates, and enhanced features Rev. Sci. Instrum. 83, 103706 (2012); 10.1063/1.4758783 High speed single charge coupled device Cranz-Schardin camera Rev. Sci. Instrum. 78, 035111 (2007); 10.1063/1.2714771Million frames per second infrared imaging system Rev.A high-speed camera that combines a customized rotating mirror camera frame with charge coupled device ͑CCD͒ image detectors and is practically fully operated by computer control was constructed. High sensitivity CCDs are used so that image intensifiers, which would degrade image quality, are not necessary. Customized electronics and instruments were used to improve the flexibility and control precisely the image acquisition process. A full sequence of 128 consecutive image frames with 500ϫ292 pixels each can be acquired at a maximum frame rate of 25 million frames/s. Full sequences can be repeated every 20 ms, and six full sequences can be stored on the in-camera memory buffer. A high-speed communication link to a computer allows each full sequence of about 20 Mbytes to be stored on a hard disk in less than 1 s. The sensitivity of the camera has an equivalent International Standards Organization number of 2500. Resolution was measured to be 36 lp/mm on the detector plane of the camera, while under a microscope a bar pattern of 400 nm spacing line pairs could be resolved. Some high-speed events recorded with this camera, dubbed Brandaris 128, are presented.

Ultrasound contrast agents : dynamics of coated bubbles

“…The relation between A 0 and A 1 is unaltered by these parameters. To investigate how and if these theoretical findings can be confirmed experimentally we recorded the radial dynamics of 45 individual microbubbles with the Brandaris ultra-high speed camera [39] as a function of both the driving pressure frequency and of the driving pressure pulse. To study purely the effect of "compression-only" on the bubble dynamics, the bubble under study was isolated and located away from neighboring objects (walls, bubbles) by means of optical tweezers.…”

“…The ultra high-speed Brandaris 128 camera [39] was coupled to a set of optical tweezers. A dichroic mirror (CVI laser) reflected the infrared laser beam (λ = 1064 nm) into the back aperture of the objective (LUMPLFL100xW, Olympus).…”

“…The Brandaris 128 camera, see Fig. 2.6, was especially designed for this purpose [39]. The camera uses a fast rotating mirror (max 20,000 rps) to sweep the image across 128 highly sensitive CCDs (charge-coupled device).…”

“…The sample was imaged with an upright microscope equipped with a water-immersed 100× objective (Olympus). The dynamics of the microbubble was captured with the ultra high-speed Brandaris 128 camera [39] at a framerate of 15 million frames per second (Mfps). An optical tweezers setup allowed for the positioning of a single microbubble in 3D [58].…”

“…The analytical solution is shown to give direct and detailed insight on how the shell parameters govern the "compression-only" behavior. We have also studied experimentally the radial dynamics and related "compression-only" behavior of single BR-14 microbubbles using the Brandaris 128 ultra-high speed camera [39]. Both the frequency and the amplitude of the driving pulse were varied to enable a full characterization of this phenomenon.…”