95
Glossary of Terms
The discussion of light detection with Charge Coupled Devices (CCDs) requires
some familiarity with the terminology used. This section includes definitions specific
to this context for some familiar terms, as well as several unique terms, abbreviations
and acronyms.
Accumulations
Accumulations are the number of repetitions for which the detector collects data and
averages the results to obtain a better signal-to-noise ratio.
ADC
An Analog to Digital Converter (ADC) converts a sample of an analog voltage or
current signal to a digital value. The value may then be communicated, stored, and
manipulated mathematically. The value of each conversion is generally referred to as
a data point.
Advanced Inverted Mode Operation (AIMO)
Advanced Inverted Mode Operation (AIMO) is a mode of operation specific to E2V
CCD chips that significantly reduces dark current generation, thereby allowing
thermo-electric cooling of the sensor to be more than adequate for most applications.
This mode of operation is also referred to as MPP, which is also discussed in this
glossary section.
Areas
Areas are defined as the active sections of the CCD detector. Signals that encounter
sections of the CCD that are not part of an active area are not recorded. Once an area
is specified, the area definitions refer to the number of areas and the size of the areas.
Back-thinning
Back-thinning is a process where the CCD substrate is etched down to be very thin (
≈
10 µm), so that incident light can be focused on the backside of the chip where its
depletion layer is not obstructed by the chip’s physical gate structure. This thinning
technique increases the CCD’s photon sensitivity as illustrated by the higher quantum
efficiency (QE) exhibited by these back-illuminated devices. It should be noted that
back-thinned chips are sensitive to etaloning effects from the 700 nm to 1100 nm
wavelength range (see Etaloning).
Binning
Binning is the process of combining charge from adjacent pixels and can be
performed in both the vertical (Y) and horizontal (X) directions. For example, a
binning factor of 2 x 2 corresponds to the combination of two pixels in both the X and
Summary of Contents for JOBIN YVON SYNAPSE
Page 1: ...SYNAPSE CCD Detection System User Manual Part Number 81100 Revision 2...
Page 10: ...Preface x...
Page 14: ...System Description and Specifications 4...
Page 28: ...Detector System Installation 18...
Page 38: ...Initial Power up and Operation 28...
Page 48: ...Temperature Control 38...
Page 72: ...Appendix A Dimensional Drawings 62 Figure 17 Distance from Focal Plane to CCD Chip...
Page 73: ...Appendix A Dimensional Drawings 63 Figure 18 Synapse Power Supply Unit...
Page 74: ...Appendix A Dimensional Drawings 64...
Page 86: ...Appendix C Performing Routine Procedures with SynerJY 76...
Page 100: ...Appendix E Accessories 90...
Page 104: ...Warranty 94...
Page 113: ...103 Notes...
Page 114: ...104 Notes...