Princeton Instruments PI-MAX 3 System, Manual, Page: 102 / 150

102 PI-MAX
®
3 System Manual Version 1.A
Digital Conversion: 16 bits
Image Intensifier:
18 mm or 25 mm
Method of Coupling:
fiber optic
Mounts: Three different interchangeable mounts/adapters are available so that C-mount
lenses, F-mount lenses, and spectrograph can all be readily accommodated.
Changeover from one mounting system to another can be accomplished in moments
with no adjustments required. Any one of the three mount types is simply secured by
four screws, which require a small Phillips screwdriver. Available mounts include:
Spectroscopy Adapter:
Three 120° slots in concentric configuration with 3.6"
bolt circles.
F-Mount Adapter:
*
Accepts standard F-mount latching mechanism.
C-Mount Adapter : Accepts standard C-mount threaded lenses.
Focal Depth (distance from adapter flat to photocathode surface)
Spectroscopy: Mounting face to image plane is factory preset to an optical
distance of 0.894” ±0.010” [22.71 mm ±0.25 mm].
F-Mount:
Mounting face to image plane is factory preset to an optical distance of
1.831” ±0.010” [46.50 mm ±0.25 mm].
C-Mount:
Mounting face to image plane is factory preset to an optical distance of
0.690” ±0.010” [17.53 mm ±0.25 mm].
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
Gen II High Res Spatial Resolution
1:1 coupling:
typically 45 µm spot size FWHM
Filmless Gen III Spatial Resolution
1:1 coupling:
typically 42 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: Linearity is difficult to predict in ICCD systems, especially at
high frame rates. Most intensifiers cannot generate sufficient light in a single
gate to achieve full scale illumination, or even approach it. Generally, it takes a
few milliseconds for an intensifier to recover from a single gate event (if the
charge output is significant). Good linearity is observed when the light intensity
*
Similar mount for Canon lenses may also be available. Contact factory for information.