LBP2 User Guide Document No: 50306-001 Rev G 3/12/2020 Page 98
APPENDIX C -1550 Phosphor Coated Cameras
NIR wavelength, 1/1.8”
Format, low resolution
NIR wavelength, 1/1.8”
Format, high resolution
Number of Effective Pixels
Minimum System Dynamic Range (2)
Frame Rates in 12 bit Mode (3)
23 fps at Full Resolution
13 fps at Full Resolution
Hardware/Software Trigger & Strobe Out
Lowest Measurable Signal (1)
50W/cm
2
/ 0.1J/cm
2
with all filters installed for
< 100ns pulse width (4)
Pulsed with trigger sync - excellent
Pulsed with video trigger - good
CW – good
(1) Despite the small pixel size, the spatial will not exceed 50μm due to diffusion of the light by the
phosphor coating.
(2) Signal to noise ratio is degraded due to the gamma of the phosphor's response. Averaging or
summing of up to 256 frames improves dynamic range by up to 16x = +24 dB.
(3) In normal (non-shuttered) camera operation, the frame rate is the fastest rate at which the laser may
pulse and the camera can still separate one pulse from the next. With electronic shutter operation,
higher rate laser pulses can be split out by matching the laser repetition to the shutter speed.
(4) This is the damage threshold of the filter glass of the filters. Assuming all filters mounted with ND1
(red housing) filter in the front. Distortion of the beam may occur with average power densities as low as
5W/cm
2
.
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