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NUBM44 Testing – G-2 Lens Focal Lengths

NUBM44 Testing - G-2 Lens Focal Lengths

Here you will see the information about different tests on NUBM44 Testing – G-2 Lens Focal Lengths. This shows how quickly the beam becomes unfocused when moving the laser away from the work without adjusting the focus.

by Barnett Unlimited, LLC

Test Parameters:
NUBM44 Diode in 40mm x 40mm x 70mm housing w/ fan
G-2 wideband focusing lens
NUBM44 input power = ~250mA
NUBM44 output power = ~250mW
Camera w/ 190-540nm wavelength blocking lens
1″ and 3″ incremental testing

Observations:

Focused beam Fast Azis appears to approximately double in size every 6″ away from work

At 12″ laser started to burn material at about 750mA with focused beam

Test Results:

Test 1: This shows how quickly the beam becomes unfocused when moving the laser away from the work without adjusting the focus.

Lens Distance = 1″ – Lens is focused for 1″
NUBM44 Testing - G-2 Lens Focal Lengths

Lens Distance = 2″ – Lens is focused for 1″
NUBM44 Testing - G-2 Lens Focal Lengths

Lens Distance = 3″ – Lens is focused for 1″
NUBM44 Testing - G-2 Lens Focal Lengths

Lens Distance = 4″ – Lens is focused for 1″
NUBM44 Testing - G-2 Lens Focal Lengths

Lens Distance = 5″ – Lens is focused for 1″
NUBM44 Testing - G-2 Lens Focal Lengths

Lens Distance = 6″ – Lens is focused for 1″
NUBM44 Testing - G-2 Lens Focal Lengths

Lens Distance = 7″ – Lens is focused for 1″
NUBM44 Testing - G-2 Lens Focal Lengths

Lens Distance = 8″ – Lens is focused for 1″
NUBM44 Testing - G-2 Lens Focal Lengths

Lens Distance = 9″ – Lens is focused for 1″
NUBM44 Testing - G-2 Lens Focal Lengths

Lens Distance = 10″ – Lens is focused for 1″
NUBM44 Testing - G-2 Lens Focal Lengths

Lens Distance = 11″ – Lens is focused for 1″
NUBM44 Testing - G-2 Lens Focal Lengths

Lens Distance = 12″ – Lens is focused for 1″
NUBM44 Testing - G-2 Lens Focal Lengths

Test 2: This shows the spot size at increasing distances away from the work while adjust the focus at each interval.

Spot size focused at 1″ focal length
NUBM44 Testing - G-2 Lens Focal Lengths

Spot size focused at 3″ focal length
NUBM44 Testing - G-2 Lens Focal Lengths

Spot size focused at 6″ focal length – Approx .060″ wide on fast axis
NUBM44 Testing - G-2 Lens Focal Lengths
NUBM44 Testing - G-2 Lens Focal Lengths

Spot size focused at 9″ focal length
NUBM44 Testing - G-2 Lens Focal Lengths

Spot size focused at 12″ focal length – Approx .125″ wide on fast axis
NUBM44 Testing - G-2 Lens Focal Lengths
NUBM44 Testing - G-2 Lens Focal Lengths