Image of Flex02L.  The dimension of the external enclosure is approximately 93x63x28 (mm).

 

Features:

  1. Sample time could be as low as 1.5625ns.   At least 512 delay times are calculated in real time.
  2. Sample time is user adjustable.  The number of delay points calculated can be as long as 2048 points.

Flex02-01D hardware specifications:

  1. Input signal: standard TTL pulses.
  2. Two BNC connectors
  3. One USB connector.
  4. Easy to use FlexWindows software and software for Windows98/2000/ME/XP libraries included.  Window 7 software is available.

Correlation mode specifications:

1. 1 bit 512 points:

  1. Input shift register width, 1 bit.
  2. The number of delay points calculated: 512
  3. Auto/cross correlations.
  4. 1.5625ns, 2ns, 4ns, 6.25ns allowable sample time.
  5. 100% real time operation.

2. 1bits 768 points

  1. Input shift register width, 1 bit.
  2. The number of delay points calculated: 768
  3. Auto/cross correlations.
  4. Allowable sample time: 10ns to 30ns in increment of 5ns.

3. 2bits 512 points

  1. Input shift register width, 2 bit.
  2. The number of delay points calculated: 512
  3. Auto/cross correlations.
  4. Allowable sample time: 20ns to 150ns in increment of 10ns.
  5. 100% real time operation.

4. 3 bits 512 points:

  1. Input shift register width, 3 bit.
  2. The number of delay points calculated: 512
  3. Auto/cross correlations.
  4. Allowable sample time: 80ns to 630ns in increment of 10ns.
  5. 100% real time operation.

5. 9 bits 512 points:

  1. Input shift register width, 9 bit.
  2. The number of delay points calculated: 512
  3. Auto/cross correlations.
  4. Allowable sample time: 320ns to 1.31us in increment of 10ns.
  5. 100% real time operation.

6. 9 bits 2048 points:

  1. Input shift register width, 9 bit.
  2. The number of delay points calculated: 2048
  3. Auto/cross correlations.
  4. Allowable sample time: 1.28 us to 653 us in increment of 10ns.
  5. 100% real time operation.

7. 16 bits 1024 points:

  1. Input shift register width, 16 bit.
  2. The number of delay points calculated: 1024
  3. Auto/cross correlations.
  4. Allowable sample time: 1.28 us to 167 ms in increment of 10ns.
  5. 100% real time operation.

8. 32 bits 2048 points:

  1. Input shift register width, 32 bit.
  2. The number of delay points calculated: 2048
  3. Auto/cross correlations.
  4. Allowable sample time: 200 us to 4 s in increment of 10ns.
  5. 100% real time operation.

More about multiple tau theory.

Multiple tau theory was invented by Klaus Schätzel.  The following papers discuss the theory and the advantage of the multiple tau scheme.

  1. Klaus Schätzel. Single Photon Correlation Techniques. Dynamic Light Scattering: The method and some applications, Edit by Wyn Brown, Clarendon Press, Oxford, P 76, 1993.
  2. Klaus Schätzel et.  Noise on Multiple-Tau Photon Correlation Data.   SPIE Vol. 1430, P109, Photon Correlation Spectroscopy: Multicomponent Systems, 1991.
  3. Klaus Schätzel. New Concept in Correlator Design. Inst. Phys. Conf. Ser. No. 77, P175, 1985.
  4. Klaus Schätzel et.  Photon Correlation Measurements at Large Lag Times.  Journal of Modern Optics, Vol. 35, No. 4, P711, 1988.
 

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Last modified: July 01, 2011