Digital streak camera captures full-color photographs of high-speed objects
Aug. 14, 2013 — Researchers at MetroLaser, Inc., have developed a new design for a digital streak camera that captures full-color images of projectiles traveling up to 3350 m/s, which is 10 times the speed of sound. This system was designed to replace the outdated film-based streak cameras that are still in use at high-speed test tracks.
Share This:
Film-based streak photography records the motion of an object as it passes in front of a camera lens, while the film moves behind a vertical slit aperture during the exposure. The result is a long, continuous composite image of the object.
However, the transition from film to digital has changed the photography industry, and the specialized film required for streak photography is no longer being manufactured. The U.S. Air Force asked Benjamin Buckner and Drew L'Esperance under a Small Business Innovation Research (SBIR) contract to design a system that could produce high-quality magazine-type images, as no existing digital technology exists that can capture images at the high speeds they require.
The new digital technology for this camera relies on a precisely controlled mirror to follow the object and freeze the image on the camera.
Buckner is the lead author of a paper describing the camera design in Optical Engineering. He explains that the galvo mirror tracks the object as it moves past the camera and directs the right portion of the object's image onto the right portion of the image sensor in order to form a complete, undistorted image.
Since the mirror is synchronized to a ballistic object, the biggest challenge is to accurately measure the object's speed, and calculate the swing of the mirror to match that speed precisely. "This has to be done in a few thousandths of a second," Buckner says.
The optical design also allows the wave of compressed air pushed along by the object (the schlieren effect) to be seen in the captured image. The camera is triggered by the motion of the object.
The digital streak camera was built to meet specifications established by operators of rocket sleds, which means that the camera is able to resolve an object 1.27 mm in size when the sled is traveling 3350 m/s, and must be able to operate outdoors in conditions of heat, cold, dust, and moisture.
The setup utilizes a commercial portrait quality digital camera and conventional photographic flash illumination. The software was designed to run efficiently on a compact, low-power computer, while maintaining a high level of mathematical accuracy.
"The real power of this approach is that you can take almost any kind of existing camera back and fit it into a rig like this to turn it into a high-speed streak camera," Buckner says.
Buckner and L'Esperance envision applications of digital streak imaging including ballistics, rocket sled imaging, and determining finishing order in high-speed races.
Welcome to SUV System Ltd!
SUV System Ltd is ISO 90012008 Certified electronics distributor with 10 years of experiences.
We have built up long term business relationship with about many companies which are stockers and authorized agents. we have a steady and reliable supply to meet customer's demands to the greatest extent .Confidently, we are able to lower your cost and support your business with our years of professional service.
SUV System Ltd is Electronic Components Distributor Supplies,Find Quality Electronic Components Supplies Products IC(Integrated Circuits),Connectors,Capacitor,Resistors,Diodes,Transistors,LED at Suvsystem.com. Sourcing Other Energy, Environment, Excess Inventory Products from Manufacturers and Suppliers at Suvsystem.com
Electronic Components distributor:http://www.suvsystem.com
Connectors Distributor:http://www.suvsystem.com/l/Connectors-1.html
IC Distributor:http://www.suvsystem.com/l/IC(Integrated-Circuits)-1.html
LED Distributor:http://www.suvsystem.com/l/LED-1.html
Capacitor Distributor:http://www.suvsystem.com/l/Capacitor-1.html
Transistor Distributor:http://www.suvsystem.com/l/Transistors-1.html
Resistor Distributor:http://www.suvsystem.com/l/Resistors-1.html
Diode Distributor:http://www.suvsystem.com/l/Diodes-1.html
SUV System Ltd insists on the managing faith ofsincereness,speciality,foresight, win-win,so we build up stable-relationship customers located all over the world, including the States, Europe, Argentina, UAE, Malaysia, Australia,and India etc
we are focus on the following fields,and hope we can help you.
INFLNEON Diodes Metal Can Packages Transistors IC(Integrated Circuits) Low Ohmic Resistors Transistors Freescale Diodes Inc Diodes Dialight LED LITTELFUSE Diodes Industrial IC VISHAY IC Electronic News About US IDT IC INTERSIL IC Connectors NXP Diodes IR transistor Schottky Diodes Microchip IC Fairchild Semiconductor Transistors TI IC Multi-units Transistors PANASONIC chip Filter saws Chip Inductors Other Parts LINEAR IC ST Diodes NXP Transistors Switching Diodes Fast Recovery Diodes Xilinx IC Rectifier Diodes LED Resistor Arrays components Cypress IC FAIRCHILD diodes Digital Transistors
http://www.suvsystem.com/a/4917.aspx
No comments:
Post a Comment