• Application software developers are advised to send out the IMD IOF command before exiting
(or disconnecting) the app. program, to protect the Intensifier at times when it isn't being used
to make an image.
• Applications may be developed to add "Auto" features, such as AutoBrite (CView
terminology) in which the application software attempts to “find” the correct settings of
Intensifier Gain, Intensifier Pulse “ON” time, and camera gain in order to display a “perfect”
image. Note: a perfect image may be defined in terms of its peak value, average value or in
terms of its histogram. Also some applications may develop an AutoShut feature (which will
quickly shut off the intensifier under over-bright conditions, then try to make an image with
short/long pulses or Intensifier Gain, depending on the scene illumination.
• IMD SON (Intensifier mode: short Pulse) IMD SON will issue pulses from (50ns, 100ns,
150ns .. 204.8us) depending on IPO parameter (same three digit Hex from 001 to FFF, but now
with a 50ns increment)
• IMD PEX (Intensifier mode: External Pulse), which will tri-state the camera-internal
INT_PULSE pulse (which will float to the “HIGH” level, protecting the Intensifier), allowing
the user to drive the Intensifier gate. IPO and IPD values are ignored. In the next rev of the
camera design, an “auxiliary connector” will be provided which would allow the user to feed
the pulse from an external source.
9.5.3 Notes on Wheel Commands
The following commands apply only to DVC-1412 cameras that are equipped with a multi-spectral
filter wheel; cameras that are not equipped with a wheel will respond to these commands with an
error message.
CMD
Code
Description Range of argument Output signals controlled
{default}
CWP Color Wheel Position {0,1,2,3,4} Internal Serial interface
{0}
CWT Color Wheel Step Time
00 ≤ two digit hex value ≤ FF
Internal Serial interface
{1E}
CWS Color Wheel Status Query None None
NOTE: In the following description, Red, Green, Blue,Clear/IRFilter represent the "standard"
version of the filter set. In many software applications that are written for RGB color, it may be
sufficient to identify the positions as Clear/IR, Red, Green, Blue. However, the unique design of
the camera allows users to change the filters in multi-spectral applications. Therefore, a more
"generic" software design will call them Position 1,2,3,4 .. and allow users to change the labels
from {Clear/IR, Red, Green, Blue} to something that is relevant their application, like {200nm,
300nm, 400nm, 500nm}.
CWP x[cr] FILTER WHEEL POSITION (HEX 0 - 4)
x = 0 = go to index position (position 3)
x = 1 = go to position 1 (Green)
x = 2 = go to position 2 (Blue)
x = 3 = go to position 3 (Clear/IRFilter)
x = 4 = go to position 4 (Red)
The power-on-default is "CWP 0" which sets up the camera in the Clear/IRFilter position; so the
camera acts just like a DVC-1412 monochrome.
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