MODIFICATION
67 -- sCMOS Camera - High speed, high resolution neutron camera
- Notice Date
- 7/26/2011
- Notice Type
- Modification/Amendment
- NAICS
- 334516
— Analytical Laboratory Instrument Manufacturing
- Contracting Office
- Department of Commerce, National Institute of Standards and Technology (NIST), Acquisition Management Division, 100 Bureau Drive, Building 301, Room B129, Mail Stop 1640, Gaithersburg, Maryland, 20899-1640
- ZIP Code
- 20899-1640
- Solicitation Number
- SB1341-11-RQ-0397
- Archive Date
- 8/13/2011
- Point of Contact
- Anna B. Suhrie, , Randy E. Schroyer, Phone: (301) 975-6314
- E-Mail Address
-
barbara.suhrie@nist.gov, randy.schroyer@nist.gov
(barbara.suhrie@nist.gov, randy.schroyer@nist.gov)
- Small Business Set-Aside
- Total Small Business
- Description
- THE DATE AND TIME FOR RECEIPT OF QUOTATIONS HAS BEEN EXTENDED UNTIL 5PM LOCAL TIME FRI. JULY 29, 2011 IN LIEU OF 3:30PM LOCAL TIME WED. JULY 27, 2011. The purpose of this amendment is to post questions and answers from industry. QUESTIONS AND ANSWERS PURSUANT TO SOLICITATION SB1341-11-RQ-0397 Question #1 - Would it be possible to reconsider the cooling specification of -40°C or lower based on the need for fast frame rates as required in Item 7 since realistically deep cooling is not necessary? Might the cooling specification in Item 10 be amended to - 5°C? Item #7 - The maximum frame rate at full pixel array resolution must be equal to or greater than 90 fps (frames per second) with a rolling shutter, faster frame rate is desired. As background, a frame rate of 90fps, or 1/90 fps represents an exposure time of 0.011 seconds. This exposure time will be referenced in the question to follow regarding the content of Item 10 as there is inconsistency between Items #7 and 10 requirement having to do with the relationship between fast frame rates and deep cooling. Item #10 - The camera must be cooled to at least minus forty degrees C or lower, this is required for long exposure times. A substantially lower temperature would be desirable. It is true that for longer exposure times (re: seconds) that deeper cooling will reduce the dark charge noise element keeping in mind that thermal cooling of an imaging sensor *only* effects the dark charge and *not* the readnoise as noted in Item 8. Given the fact that dark charge is measured in electrons-per-pixel-second (e/p/s), 90fps represents an exposure time of 0.011seconds, and the dark charge noise (re: sensor temp of -5°C, for example) at this exposure time would be SQRT(0.022e) = 0.15e-, which is insignificant when compared to the read noise. Therefore, the need for deep cooling at faster frame rates with this sensor (re: >30fps) is realistically not necessary. Question #2 - Is the camera to be operated in a continuous streaming mode in "real time", and if so, what is the expected length of the record time? Item #13 - All required cabling, data acquisition cards, and software to control the camera and continuously (not just burst mode) save data at full spatial resolution (specification 4) and maximum frame rate (specification 5) must be included. Answer #1-#2 - It is anticipated that this camera will be used in multiple modes, from high frame rate to low frame rate. In this respect, the comment about dark noise at high frame rate is understood. But, the small pixel pitch of the camera (smaller than state-of-the-art of most CCDs) will enable acquiring higher resolution images; as in scintillator/ccd systems one of the limiting factors is the pixel pitch of the light sensor. With high spatial resolution imaging there is less light requiring longer exposures times, thus there is need for the deepest cooling possible. The camera will be used in a streaming mode. It is difficult to know what user exact demands will be, but it is assumed that at full resolution and full frame rate, NIST would acquire up to 30 s. There would be continuous streaming (many minutes) at the frame rate / resolution setting that "maxed-out" the data transfer of the system, which includes the data transfer cable, the computer interface (i.e. PCI card, ethernet, etc.), and disk write speed.
- Web Link
-
FBO.gov Permalink
(https://www.fbo.gov/spg/DOC/NIST/AcAsD/SB1341-11-RQ-0397/listing.html)
- Place of Performance
- Address: 100 BUREAU DRIVE, GAITHERSBURG, Maryland, 20899, United States
- Zip Code: 20899
- Zip Code: 20899
- Record
- SN02511287-W 20110728/110726235753-14e08fcfcccf989bc0c7d9b139c1350f (fbodaily.com)
- Source
-
FedBizOpps Link to This Notice
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