High frame rate CCD cameras with fast optical shutters for military and medical imaging applications
- Los Alamos National Lab., NM (United States)
- Lawrence Berkeley Lab., CA (United States)
Los Alamos National Laboratory has designed and prototyped high-frame rate intensified/shuttered Charge-Coupled-Device (CCD) cameras capable of operating at kilohertz frame rates (non-interlaced mode) with optical shutters capable of acquiring nanosecond-to-microsecond exposures each frame. These cameras utilize an Interline Transfer CCD, Loral Fairchild CCD-222 with 244 {times} 380 pixels operated at pixel rates approaching 100 Mhz. Initial prototype designs demonstrated single-port serial readout rates exceeding 3.97 Kilohertz with greater than 51p/mm spatial resolution at shutter speeds as short as 5ns. Readout was achieved by using a truncated format of 128 {times} 128 pixels by partial masking of the CCD and then subclocking the array at approximately 65Mhz pixel rate. Shuttering was accomplished with a proximity focused microchannel plate (MCP) image intensifier (MCPII) that incorporated a high strip current MCP and a design modification for high-speed stripline gating geometry to provide both fast shuttering and high repetition rate capabilities. Later camera designs use a close-packed quadruple head geometry fabricated using an array of four separate CCDs (pseudo 4-port device). This design provides four video outputs with optional parallel or time-phased sequential readout modes. The quad head format was designed with flexibility for coupling to various image intensifier configurations, including individual intensifiers for each CCD imager, a single intensifier with fiber optic or lens/prism coupled fanout of the input image to be shared by the four CCD imagers or a large diameter phosphor screen of a gateable framing type intensifier for time sequential relaying of a complete new input image to each CCD imager. Camera designs and their potential use in ongoing military and medical time-resolved imaging applications are discussed.
- Research Organization:
- Los Alamos National Lab., NM (United States)
- Sponsoring Organization:
- Department of Defense, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 10182010
- Report Number(s):
- LA-UR-94-2898; CONF-940723-21; ON: DE94018316
- Resource Relation:
- Conference: Annual meeting of the Society of Photo-Optical Instrumentation Engineers,San Diego, CA (United States),24-29 Jul 1994; Other Information: PBD: [1994]
- Country of Publication:
- United States
- Language:
- English
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47 OTHER INSTRUMENTATION
IMAGE INTENSIFIERS
DESIGN
CAMERAS
CHARGE-COUPLED DEVICES
TIME RESOLUTION
DATA ACQUISITION SYSTEMS
IMAGE PROCESSING
FUNCTIONAL MODELS
GAMMA DETECTION
NEUTRON DETECTION
440103
440600
NUCLEAR SPECTROSCOPIC INSTRUMENTATION
OPTICAL INSTRUMENTATION