![]() ![]() A pixel switching subsystem selects pixels from the colour video cameras according to the distance measured by the profilometer, and compiles them into a single omni-focus image which is displayed on a screen. The omni-focus laparoscope is comprised of an array of infrared and colour video cameras aimed at the same point but focused at different distances, and a laparoscopic profilometer subsystem to measure the various distances captured in the field of view. One of the system’s main advantages is its simplicity: only the tiny laparoscope, with two light rings built along the shaft, travels inside the patient the majority of the imaging and computing hardware is housed outside the body. The experimental set-up uses a laparoscope 0.64 centimetres in diameter and 30 centimetres long, but could easily be modified to fit standard incision diameters of 0.5, 1 or 1.5 centimetres. Autofocus means that a finite number of spots on the image are in focus at one time, while omni-focus means all points in the image are in focus at once, even over a much greater depth of field. Professor Iizuka’s omni-focus device provides great advantages over even the latest model “chip in tip” laparoscope which typically allows a depth of focus of 10 centimetres. He recently received an international patent for the system. In demonstrating the system, Professor Iizuka shows the miniscule opening of a syringe on a fingerprint right in front of the laparoscope’s tip, and a large Japanese Daruma doll across the room, both in crystal-clear focus in a single image. The omni-focus camera lets you see both the singer and orchestra in focus at the same time.” “The singer might be in focus, but the orchestra isn’t. “Imagine you’re watching a concert on television,” Professor Iizuka says. ![]() Professor Keigo Iizuka demonstrates his experimental omni-focus laparoscope setup.
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