Small-aperture Fiber-optic Probes are best for testing closely-spaced LEDs. With an aperture of 1mm, and a diameter of 1.2mm/0.050 inches, they can test LEDs spaced as close as 0.050 inches on center. Small-aperture Fiber-optic Probes are available with straight or right-angle stainless-steel tips as shown below. This allows for precise customization to your mechanical constraints.
Straight Small-Aperture Fiber-optic Probes
Side-looking Small-aperture Fiber-optic Probes: for Side-emitting LEDs
For the most cost-efficient test, you may also want to consider the Small-aperture Trident Fiber-Optic Probes which test three LEDs with a single Sensor. This method of testing large quantities of LEDs scales up so that testing 3, 30, 300 or any number of LEDs is far more cost-efficient than any other method. This is our most popular Fiber-optic Probe and can be combined with any of our Universal LightProbe Sensors.
And for the full selection of our Fiber-optic Probes, check out the Universal LightProbe Catalog