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CCD with controllable clocks
I'm working on a new scheme to do high-cadence photometry using CCDs by
shifting the image during exposure. (Shift the image, pause for a millisecond or so, shift the image, pause, repeat..., and while you are doing that you are continuously reading the shifted rows. The basic idea is similar to what the Taiwan-America Occultation Survey is doing http://adsabs.harvard.edu/abs/2003BaltA..12..568C ) For what I want to do, I need a CCD camera with 1) High speed readout and transfer ( 1Mpixel/s, even at the expense of noise) 2) Interline or frame transfer CCD. (Full frame might be usable if it is a 4-phase device that supports shifting the image in both directions.) 3) Computer-programmable control of the clock lines, so that my program can control (e.g. running on a desktop computer using standard APIs, or a microcontroller attached to interface lines) can shift the image, shift the frame transfer area, transfer to the interline registers, etc. Most cameras nowadays have everything controlled by an onboard microcontroller that doesn't give the flexibility I need. The CCD doesn't have to be large format for trying out my ideas. (Plan B is to adapt a Cookbook245 camera (circa 1995 homebuilt CCD camera with TV resolution)) Does anybody know of a good camera with these characteristics? Thanks. -- David M. Palmer (formerly @clark.net, @ematic.com) |
#2
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CCD with controllable clocks
On Wed, 04 Apr 2007 05:17:20 GMT, "David M. Palmer"
wrote: I'm working on a new scheme to do high-cadence photometry using CCDs by shifting the image during exposure... Does anybody know of a good camera with these characteristics? Nearly all of the SBIG cameras support drift-scan operation. Some software, such as Maxim, allows you to set the shift rate to anything you want, which sound like what you want to do. _________________________________________________ Chris L Peterson Cloudbait Observatory http://www.cloudbait.com |
#3
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CCD with controllable clocks
David,
Take a look at this. It may be useful. I haven't tried it, but it looks interesting. http://www.driftscan.com/ Eric. David M. Palmer wrote: I'm working on a new scheme to do high-cadence photometry using CCDs by shifting the image during exposure. (Shift the image, pause for a millisecond or so, shift the image, pause, repeat..., and while you are doing that you are continuously reading the shifted rows. The basic idea is similar to what the Taiwan-America Occultation Survey is doing http://adsabs.harvard.edu/abs/2003BaltA..12..568C ) For what I want to do, I need a CCD camera with 1) High speed readout and transfer ( 1Mpixel/s, even at the expense of noise) 2) Interline or frame transfer CCD. (Full frame might be usable if it is a 4-phase device that supports shifting the image in both directions.) 3) Computer-programmable control of the clock lines, so that my program can control (e.g. running on a desktop computer using standard APIs, or a microcontroller attached to interface lines) can shift the image, shift the frame transfer area, transfer to the interline registers, etc. Most cameras nowadays have everything controlled by an onboard microcontroller that doesn't give the flexibility I need. The CCD doesn't have to be large format for trying out my ideas. (Plan B is to adapt a Cookbook245 camera (circa 1995 homebuilt CCD camera with TV resolution)) Does anybody know of a good camera with these characteristics? Thanks. |
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