Posted in | Light Sources

An LED Light Manager for 3D Photometric Stereo & 2D Multi-Light Applications

Able to drive as many as four separate lights – including virtually all light types – the LLM can also drive four different channels or quadrants within an integrated photometric or multispectral ring light solution.

Each individual program is able to contain as many as four sequences with up to four lights. These lights can be set at either ‘off’, continuously ‘on’, or any intensity level between the two. There is even an OverDriveTM strobe mode.

By connecting the LLM to a computer using an Ethernet cable, and using the browser-based interface to program the light via a series of drop-down menus, it is possible to program four separate LED light sources, or the four quadrants of a single LED illumination system such as a ring light.

Technicians of any skill level are able to set program intensities and image sequences for each light via the intuitive user interface.

The initial target of the LLM system and light kit bundles will be 2D multi-light and 3D photometric stereo applications. The lighting system can solve previously intractable tasks when it is used in conjunction with specialized photometric stereo software from Matrox Imaging, Cognex, TeleDyne DALSA, SICK or MVTec.

An example of such a task is the ability to find a defect in the surface of a part. The photometric image processing software achieves this by capturing successive images of a stationary object while it is lit up by a sequence of lights.

In doing so, it is able to determine the 3D surface orientation of every pixel on the surface of the object. By using separate lights and/or cameras, this same technique is able to generate 2D images of various regions of interest.

For multispectral imaging solutions where LED wavelengths (not broad-spectrum white lights with optical filters before the sensor) are the spectral band selection mechanisms, LLM can also be used.

The cost of multispectral imaging solutions can be significantly reduced by using illuminating light’s color as the spectral band selection mechanism. This consequently increases budgets for imaging applications.

Product Specification

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Electrical Input 24 V DC +/- 5%
Electrical Input Connector 2 position screw terminal block — 14 AWG max wire size
Operating Current (No Load) 70 mA
Number of Input
Channels
8 (Including 1 input channel with interrupt capability)
Input Connector 8 position screw terminal block — 14 AWG max wire size
Max Input Channel Voltage 26 V
On / Off Trigger Input PNP mode: +4 V DC or greater to activate (max 26 V DC)
NPN mode: GND (<1 V DC) to activate
Input Channel Current PNP Line: 4 mA @ 4 V DC | 10 mA @ 12 V DC | 20 mA @ 24 V DC
NPN Line: 15 mA @ Ground (0 V DC)
Output Channels 4 channels for lights plus 2 additional outputs, such as a camera trigger
Output Connectors 4 5-pin M12 connectors
10 position screw terminal block – 14 AWG max wire size (configurable for NPN or PNP)
Output Current
(Per Channel)
PNP (sourcing): 65 mA
NPN (sinking): 65 mA
M12 Connector
(Per Channel)
Continuous mode: 1.85 A (polyfuse protected)
OverDrive™: 10 A — 10% duty cycle (polyfuse protected)
Total Current: 8 A (polyfuse protected)
Analog Output
(Per Channel)
Voltage: 1–10 V DC, continuous mode intensity control
Current: 0.5 mA max (with fault protection)
Slave Mode Selectable and configurable with dip switches
Indicator Lights Power on = Green light
Ethernet = 2 indicator lights
Protection Circuitry Polyfuse protection
Programming Connector Ethernet port
SD Card microSD card
Reset Button Hold down for 3 seconds
Mounting DIN rail
Dimensions H = 120 mm (4.7"), L = 107 mm (4.2"), W = 45 mm (1.8")
Ambient Temperature -18º–40 ºC (0º–104 ºF)
Ambient Humidity 0–95% non-condensing
Weight ~233 g
Compliances CE, RoHS
Terminal Blocks
(Included with LLM)
2 connector terminal block
8 connector terminal block
10 connector terminal block

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