Intelligent lighting - Part 1
LEDS VS ALTERNATIVES
They're on almost every new car that's launched these days...
Historically, quartz halogen and fluorescent lights were the most common sources.
Thanks to improved intensities, control, cost effectiveness, and especially longevity, LEDs have surpassed them (in most applications)
LEDs are great for precise control. Not only can you pick a very narrow, specific wavelength of light, very quick on / off and brightness control is also achievable.
Unlike the alternatives, LEDs don’t take very long to reach their full brightness. Enabling much finer control of the lighting
...or by using a pulse width modulation (PWM) controller (a way of achieving analogue control using a digital signal)
Once you have control of when the light is “on”, the pulses (strobes) can be synchronised to when the product is in the right position
This control is achieved by anything that can provide a digital trigger signal.
Typically this is generated by:
- An encoder pulse, product sensor or PLC signal
- A software trigger (eg the machine vision software)
- The camera itself (some cameras have this feature enabled)
Running continuously, at their specified current rating, LEDs output 100% of their brightness...