184 PI-MAX/PI-MAX2 System Manual Version 5.F
C-Mount (microscopy) Adapter: accepts standard C-mount threaded lenses.
Note: C-mount detectors are shipped with a dust cover lens installed. Although this
lens is capable of providing surprisingly good images, its throughput is low and the
image quality is not as good as can be obtained with a high-quality camera lens.
Users should replace the dust-cover lens with their own high-quality laboratory lens
before making “real” measurements.
Focal Depth (distance from adapter flat to photocathode surface)
Spectroscopy: 0.894"
F-Mount: 46.5 mm
C-Mount: 17.5 mm (0.690")
Vignetting: With fiber optic coupling there is no vignetting. With a 1024 × 256 array,
which has a width of 26 mm, pixels that fall beyond the 18 mm or 25 mm width
(depending on intensifier width) of the intensifier will not be illuminated.
Gen II Spatial Resolution
1:1 coupling: typically 70 µm spot size FWHM
1.27:1 coupling: typically 55 µm spot size FWHM
Gen II High Res Spatial Resolution
1:1 coupling: typically 45 µm spot size FWHM
1.27:1 coupling: typically 40 µm spot size FWHM
Gen III Spatial Resolution
1:1 coupling: typically 42 µm spot size FWHM
1.27:1 coupling: typically 38 µm spot size FWHM
Geometric Distortion: typically < 1 pixel
Sensitivity: Variable intensifier gain adjustment (via software) allows sensitivities from
1-80 counts per photoelectron. Some phosphor choices may result in lower
values.
Gating ON/OFF Ratio
Visible (550 nm): 5 x 10
6
:1 typical
UV (250 nm): 10
4
:1 with photocathode gating only; 10
6
:1 with supplemental
MCP bracket pulsing typical.
Response Linearity: Better than 1% for the upper 95% of range in ungated operation.
Slightly non-linear response at lower 5% of range, due to phosphor nonlinearity.
Photocathode Dark Charge (EBI): Red-blue enhanced, < 5 counts/pixel-second;
Red-enhanced, < 15 counts/pixel-second
Phosphor Decay: 2 msec P43 standard, 1 µsec P46 phosphor is optional
Spectral Range
Gen II: Red-blue enhanced, 180-900 nm; Red enhanced, 360-920 nm
Gen III: HQ, 450-900 nm (3 dB cutoff wavelengths); HQ (Blue), 375-900 nm
Nonuniformity: Typically 12% pk-pk for Gen II 18 mm intensifiers, 16% pk-pk for
Gen II 25 mm intensifiers
To Next Page
Loading...
