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| General-Purpose DVT Vision Sensors | DVT Color Vision Sensors | Line Scan |
| Lighting | Lenses | Vision Application Checklist | Lab |
Lighting : Advanced Illumination & CCS |
Advance
Illumination Products |
|
Backlighting
is one of the most basic types of inspection illumination.
A backlight provides a field of even illumination against
which the part is viewed as a silhouette. Although backlights
are most frequently used for measuring, sorting, or determining
the orientation of parts, we have used backlights in
situations requiring extremely diffuse illumination.
We build backlights in a range of sizes and wavelengths,
including infrared.
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Backlight |
BL1520
Backlight
|
|
If you crossed the
diffuse illumination of a dome and the direct illumination
of a spotlight, the result would be our Broad Area Linear
Array (BALA). Designed for inspecting circuit boards, BALAs
provide low angle of incidence illumination over a long,
wide area. Creating illumination that is very even in intensity
along the length of the light, with controlled “fall
off” in the transverse direction (see illustration)
two BALAs can be placed parallel and facing each other
to create a wider area of illumination. Useful for inspecting
moderately reflective materials, BALAs can be used as replacements
for fluorescent lighting. Applications range from bottle
placement inspections to medium and large sized circuit
board inspections.
|
Broad
Area 
Linear Array |
AL4424
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|
Diffuse
illumination,
with properties similiar to the light on an overcast day,
creates minimal glare during the inspection of reflective
materials. Standard domes offer rugged housings for potentially
hostile work environments, and have been mounted on robotic
arms for fast-paced inspections. All three diffuse lights
can be ordered in a full range of visible and IR wavelengths,
and the DL7248 and DL9160 are available in an RGB “all
color” version. Applications range from reading print
on the bottom of aluminum cans to inspecting for flaws
in metal parts.
See Axial Diffuse illuminators.
|
Diffuselite
|
DL2230
|
Axial Diffuse Illuminators
For reflective materials an Axial Diffuse Illuminator
(ADI) offers illumination that creates minimal glare.
Delivering even illumination over the entire designated
field of view, our ADIs come in four sizes and can be
ordered in a full range of visible and IR wavelengths,
with our DL2449 also available in an RGB “all color” version.
Heat sinking the LEDs eliminates the need for cooling
fans, providing vibration free performance, and a dust
cover protecting the beam splitter minimizes cleaning.
Applications include reading print on metal surfaces,
can lids, and metal coated leads.
|
Axial
Diffuse
Illuminator |
DL2449
|
|
Bright Field Ring Lights combine direct
illumination with around-the-lens mounting convenience,
providing an out of the way lighting solution for applications
requiring a high degree of contrast on non-reflective
objects. Ranging in diameter from 50mm to 125mm, our
ring lights can be configured for a wide variety of working
distances and fields of view. All Ai ring lights are
available in the full spectrum of visible and IR wavelengths,
with many also available in our RGB “all color” version.
Mounting options include brackets, “C” mounts,
and collar mounts. See Dark Field products.
|
On
Axis
Ringlight
|
RL4260
|
Dark
Field Illuminators
Dark
Field Illuminators are generally used on reflective surfaces
to create a stark contrast between the background and
specific features, for OCR inspections, or defects such
as scratches and packaging tears. Using light to create
dark areas may sound like an odd idea, but projecting
light at an angle to the surface of an object will cause
it to be deflected away from the camera - unless a surface
variation causes the light to deflect into the lens.
Nothing is seen by the vision system if there are no
surface aberrations. Ai’s line of dark field illuminators
includes classic 45° dark field and our line of low
angle opposed lights.
|
Classic
Dark Field |
Low Angle
Dark field |
Spotlights are well suited for applications requiring
a high degree of contrast on non-reflective objects.
A flexible on-axis light source, spotlights can be used
in place of other light types, or the LEDs can be aimed
to create specific custom patterns, such as creating
two separate areas of illumination. More complex inspections
might require multiple spotlights to create a range of
effects.
|
Spotlight
 |
SL2507
|
| Line
Lights provide a narrow, extremely intense band of illumination.
Ai’s line lights come in three different lengths
and are available with 4 lens types with working distances
from 12.5mm to 140mm, generating lines ranging from 3mm
to 20mm in width. Primarily used in conjunction with
line scan cameras for web inspections such as print products
or fabrics, line lights can also be incorporated into
inspections requiring a narrow, intense area of illumination
to highlight specific details.
|
Line Light lensing 
|
LL2912
|
| From
a simple on/off current source to independent four-channel
current control, to strobing at pulse widths
as low as one µ sec, we have a product to suit every
application.
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 |
|
Ai offers
band pass filters, extension cables, Dual Head “Y” cables,
and camera brackets for
use with our lighting products.
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