Piranha HS-S0-06K Camera User Manual
Teledyne DALSA
03-032-20213-01
43
4.1 Lens Mounts
Model Number Lens Mount Opening
H S-S0-06K
M72x0.75 thread .
4.2 Optical Interface
Illumination
The am ou nt an d w avelength s of light requ ired to cap tu re u sefu l im ages d ep end on the
p articu lar ap p lication. Factors inclu d e the natu re, sp eed , and sp ectral ch aracteristics of
objects being im aged , exp osu re tim es, light sou rce characteristics, environm ental and
acqu isition system sp ecifics, and m ore. The Know led ge Center on ou r Web site,
(
http :/ / w w w .teled yned alsa.com / m v/ know led ge/ ap p n otes.asp x
) p rovid es an
introd u ction to this p otentially com p licated issu e. See ―Rad iom etry and Photo
Responsivity‖ and "Sensitivities in Photometric Units" in the CCD Technology Primer
fou nd u nd er the Ap p lication Su p p ort link.
It is often m ore im p ortant to consid er exp osu re than illu m ination. The total am ou nt o f
energy (w hich is related to the total nu m ber of p hoton s reaching the sensor) is m ore
im p ortant than the rate at w hich it arrives. For exam p le, 5
J/ cm
2
can be achieved by
exp osing 5m W/ cm
2
for 1m s ju st the sam e as exp osing an intensity of 5W/ cm
2
for 1
s.
Light Sources
Keep these gu id elines in m ind w hen setting u p you r light sou rce:
LED light sou rces are relatively inexp ensive, p rovid e a u niform field , and longer life
sp an com p ared to other light sou rces. H ow ever, they also requ ire a cam era w ith
excellent sensitivity, su ch as the H S-Sx cam era.
H alogen light sou rces generally p rovid e very little blu e relative to infrared light (IR).
Fiber-op tic light d istribu tion system s gen erally transm it very little blu e relative to IR.
Som e light sou rces age; over their life sp an they p rod u ce less light. This aging m ay
not be u niform —a light sou rce m ay p rod u ce p rogressively less light in som e areas of
the sp ectru m bu t not others.
Filters
CCD cam eras are extrem ely resp onsive to infrared (IR) w avelengths of light. To p revent
infrared from distorting the images you scan, use a ―hot mirror ‖ or IR cutoff filter that
transm its visible w avelength s bu t d oes not tr an sm it w avelengths over 750nm . Exam p les
are the Schneider Optics™ B+W 489, w hich includes a mounting ring, the CORION ™ LS-
750, w hich does not include a mounting ring, and the CORION ™ H R-750 series hot
m irror.
Lens Modeling
Any lens su rrou nd ed by air can be m od eled for cam era p u rp oses u sing three p rim ary
p oints: the first and second p rincip al p oints an d the secon d focal p oint. The p rim ary
p oints for a len s shou ld be available from the lens d ata sheet or from the lens
m anu factu rer. Prim ed qu antities d enote characteristics of the im age sid e of the lens. Th at
is,
h
is the object height an d
h
is the im age height.
