250nm to 520nm Laser Shielding – 24″ x 24″


Protect your EYES!

We have contracted with a large plastic manufacturer to produce this high Optical Density Acrylic at OD 4+.  This is the BEST you will find for the price!  Most other plastic is OD2 at best.


-OD4+ laser filtering up to 500nm
-23 7/8″ by 23 7/8″  HUGE!

Now thicker material at 3/16″!

SKU: Shielding_445_24_24 Categories: ,


Enclose your whole machine with this GIANT piece of shielding!  This is about how big we can get a piece and still be able to ship it effectively.  It costs a bit more than our smaller pieces due to the increased packaging cost.

This is a must for your new laser build! Protect the area around your machine and everyone’s eyes from stray laser radiation reflections.  This material is optical grade semi-transparent acrylic material that has been tested with our 405nm and 445nm lasers to show an OD of 4+.  Sheets are sold in 23 7/8″ x 23 7/8″ sizes.  Easily cut with saw or router to desired size for your machine.  You can even cut it with your new 3.8W laser kit and engrave your logo or warning signs on it as well.  Each piece comes with “Warning – Laser in Use”, “OD 4+ @445nm”, and “Warning – Never Look Directly into a Laser Beam” stickers for safety.

Be safe and not only wear safety goggles, but enclose your working area of your laser upgrade machine!

*As of 9/12/2016 we are shipping thicker shielding pieces.  They are now 3/16″ to keep the OD4+ rating.

Tested Specifications:

Size: 23 7/8″ x 23 7/8″
Thickness: 3/16″ (0.1875″) (4.76mm)
Weight: 72 oz
Wavelength Range: 250nm to 520nm
Visible Light Transmittance:
Optical Density:
4 (OD 4+)
10-4 < N% < 10-5


Testing Shielding with 445nm laser 800Testing setup with 445nm laser

Laser marking with 445nm laser shielding

Laser marking circuit boards with shield.  Notice the spot is very attenuated.

Laser marking without shielding

Same laser marking without shielding.  Quite a difference with laser reflection.

445 Laser Shielding Example

Laser Cut and Engrave Example

Do not operate lasers without correct protective equipment and training. Laser Safety Shielding is not intended to replace laser protective eyewear (laser glasses or laser goggles) or other laser safety products that maybe required. Contact us or your certified laser safety officer for more information.

Additional information

Weight 5.5 lbs
Dimensions 23.75 x 23.75 x .1875 in


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