The COBRA Linescan Illuminator has been designed "from the chip up" for the
extreme requirements of high-speed linescan and web inspection. Producing
an illuminance of up to 220,000 lux, the LED-based COBRA lines are comparable
to, or outperform, halogen and fluorescent line illumination, while offering all
of the many advantages of LEDs - long lifetime, controllability, and increased
reliability.
Intense optical output is achieved by means of StockerYale's patented chip-onboard
reflective array (COBRA) technology, a unique innovation in thermal and
optical efficiency for LED arrays. The chip-on-board approach to LED module
fabrication yields an essentially unbroken line of semiconductor light source,
resulting in an extremely high level of uniformity. The combination of high
intensity and superior uniformity results in crystal clear linescan images.
Features
Specifications
Patented COBRA technology
enables breakthrough in optical
intensity
Current-regulation electronics
integrated into COBRA unit
Intensity can be adjusted using
0 to 5 V analog voltage control
Meets NEMA 12 requirements
High level of uniformity due to
chip-on-board LED fabrication
125 mm, 250 mm and 500 mm
Available in red, IR, blue, UV
and white
Backlight and frontlight
configurations
Colour
UV
Blue
Red
IR
White
Spectral Characteristics
Peak wavelength
(nm)
395 ± 5
470 ± 5
630 ± 10
740 ± 10
NA
Spectral width FWHM
(nm)
30
30
30
30
NA
Colour temperature
(°K)
NA
NA
NA
NA
5500
Focus and Illumination Field*
Working distance (wd) for
maximum illuminance and
irradiance
(mm)
40
40
40
40
40
Linewidth FWHM at wd
(mm)
5.3
5.3
5.3
5.3
9.1
Maximum Irradiance and Illuminance**
TCL and SCL
Max. Irradiance (W/m2)
200
750
1100
100
NA
Max. Illuminance (lux)
NA
50000
220000
NA
175000
CCL and RCL
Max. Irradiance (W/m2)
57
214
314
314
NA
Max. Illuminance (lux)
NA
14300
62900
NA
50000
DC Electrical Power Requirements***
TCL and SCL
125mm(W)
20
25
34
34
29
250mm(W)
40
50
69
69
58
500mm(W)
80
100
138
138
116
CCL and RCL
125mm(W)
5.7
7.1
9.7
9.7
8.3
250mm(W)
11
14
19
19
17
500mm(W)
23
29
333
39
33
The information presented above is for COBRAs in the frontlight configuration
* All illuminance and irradiance values are shown for the 125mm units. The optical outputs of the longer units are several
percent greater. See Figure 1 for graphs of intensity and linewith versus working distance.
** Illuminance and irradiance measurements were taken at a working distance of 40 mm, using a detector with a 4 mm
diameter aperture.
*** It is recommended that the 48V power supplies provided by StockerYale be used.
