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Endurance NICHIA NUBM31 / NUBM31T 85 watt laser module

Endurance NICHIA NUBM31 / NUBM31T  85 watt laser module

Endurance have started to work on a new 85 watt laser module using

 

 

Beam parameters:

Beam divergence: 15 mRad

Aperture: 30 mm

Laser beam spot: 1 mm

Focal depth: 1.5 mm

 

Projected optical system:

Material: BK 7
Laser lens diameter: 50 mm
Laser lens focus: 50 mm
Luminosity: 1:1

Optical system calculations

The projected laser beam spot and a focal depth

Laser beam spot in mm Max power density: kW / Cm^2 Focal depth in mm.
0.2 x 0.4 91 19.43-20.57
0.16 x 0.3 34 5.7-8.4
0.16 x 0.33 151 15.26-15.95
0.16 x 26 27 0-0.5
0.10 x 0.21 345 10.15-10.45

 

Examples of pictures of spots obtained in the calculation:

Endurance NICHIA NUBM31 / NUBM31T  85 watt laser module

This is the focal spot of an ideal lens with F = 1000 mm. Frame size 50 x 50 mm. The graphs show the intensity distributions in a spot (in W / cm2) along the horizontal and vertical axes passing through the center of the spot.

When focusing with an ideal lens, the shape of the spot in focus does not change, only its size changes. For example, a spot in focus of an ideal lens with F = 25 mm:

 

Endurance NICHIA NUBM31 / NUBM31T  85 watt laser module

Here the frame size is 1.25 x 1.25 mm.

But when focusing with a real lens, due to aberrations, the shape of the spot also changes. This is how the spot looks when focusing with a single plano-convex lens with F = 25 mm:

 

Endurance NICHIA NUBM31 / NUBM31T  85 watt laser module

The size of the frame is the same 1.25 x 1.25 mm. It can be seen that the widths of the peaks changed slightly, but the distant wings appeared. For reference: now only 42% of the power emitted by the diode gets inside the 1.25 x 1.25 mm frame, while with an ideal lens, 97% of the power falls into the same frame. True, an ideal lens is considered ideal in every sense, i.e. it is believed that it does not introduce losses into the beam, while a real lens is assumed not to be anti-coated, which means that about 8%, or a little more, is lost due to reflection on its surfaces.

Detailed research (PDF) >>>

 

NICHIA NUBM31 / NUBM31T  diode array system

Endurance NICHIA NUBM31 / NUBM31T  85 watt laser module

 

 

 

Other modules like NUBM36 / NUBM34 are on our watch list…

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