These laser safety fabric panels are designed to replace the side panels of our optical enclosures. Using the fasteners sold separately below, the panels can be attached to the 25 mm rails that make up the enclosure frame. The eyelets on the fabric panels are positioned to align with the channels on the sides of the rails. The table to the right shows compatible stock enclosures for each size panel. If building a custom enclosure using 25 mm rails, please see the complete drawings by clicking on the red Docs icon () below.
Thorlabs' laser safety fabric is designed to withstand high laser energy up to EN 12254: 2010(E) certification. The laser rated material is made of a rubber compound fabric, which is the same material used to make our laser safety fabric and laser safety curtains.
For instructions on attaching a fabric panel to an enclosure, please refer to the manual.
*DISCLAIMER This laser safety fabric has been tested by a third party using EN specifications; see the Certifications tab above for details. Due to manufacturing variances, mechanical wear, and laser damage, Thorlabs assumes no responsibility for laser material failure. Please consult your local laser safety specialist before purchasing to ensure that the fabric is suitable for your application. To minimize risk, inspect the material before each use and ensure that it is in excellent condition.
This laser safety fabric has been tested by a third party using EN specifications. Due to manufacturing variances, mechanical wear, and laser damage, Thorlabs assumes no responsibility for laser material failure. Please consult your local laser safety specialist before purchasing to ensure that the fabric is suitable for your application. To minimize risk, inspect the material before each use and ensure that it is in excellent condition.
Flame does not reach the test mark with the burner in position, and self-extinguishes after removal of the burner. Material does not continue to glow for more than one second after removal of the burner.
Samples do not exhibit any cracking, peeling, or degradation. For laser wavelengths, samples do not exceed maximum spectral transmission for scale number. Samples maintained optical density using both laser and spectrophotometer.
These certification levels are reproduced from EN 12254: 2010(E).
Laser Safety and Classification
Safe practices and proper usage of safety equipment should be taken into consideration when operating lasers. The eye is susceptible to injury, even from very low levels of laser light. Thorlabs offers a range of laser safety accessories that can be used to reduce the risk of accidents or injuries. Laser emission in the visible and near infrared spectral ranges has the greatest potential for retinal injury, as the cornea and lens are transparent to those wavelengths, and the lens can focus the laser energy onto the retina.
Safe Practices and Light Safety Accessories
Thorlabs recommends the use of safety eyewear whenever working with laser beams with non-negligible powers (i.e., > Class 1) since metallic tools such as screwdrivers can accidentally redirect a beam.
Laser goggles designed for specific wavelengths should be clearly available near laser setups to protect the wearer from unintentional laser reflections.
Goggles are marked with the wavelength range over which protection is afforded and the minimum optical density within that range.
Post appropriate warning signs or labels near laser setups or rooms.
Use a laser sign with a lightbox if operating Class 3R or 4 lasers (i.e., lasers requiring the use of a safety interlock).
Do not use Laser Viewing Cards in place of a proper Beam Trap.
Lasers are categorized into different classes according to their ability to cause eye and other damage. The International Electrotechnical Commission (IEC) is a global organization that prepares and publishes international standards for all electrical, electronic, and related technologies. The IEC document 60825-1 outlines the safety of laser products. A description of each class of laser is given below:
This class of laser is safe under all conditions of normal use, including use with optical instruments for intrabeam viewing. Lasers in this class do not emit radiation at levels that may cause injury during normal operation, and therefore the maximum permissible exposure (MPE) cannot be exceeded. Class 1 lasers can also include enclosed, high-power lasers where exposure to the radiation is not possible without opening or shutting down the laser.
Class 1M lasers are safe except when used in conjunction with optical components such as telescopes and microscopes. Lasers belonging to this class emit large-diameter or divergent beams, and the MPE cannot normally be exceeded unless focusing or imaging optics are used to narrow the beam. However, if the beam is refocused, the hazard may be increased and the class may be changed accordingly.
Class 2 lasers, which are limited to 1 mW of visible continuous-wave radiation, are safe because the blink reflex will limit the exposure in the eye to 0.25 seconds. This category only applies to visible radiation (400 - 700 nm).
Because of the blink reflex, this class of laser is classified as safe as long as the beam is not viewed through optical instruments. This laser class also applies to larger-diameter or diverging laser beams.
Lasers in this class are considered safe as long as they are handled with restricted beam viewing. The MPE can be exceeded with this class of laser, however, this presents a low risk level to injury. Visible, continuous-wave lasers are limited to 5 mW of output power in this class.
Class 3B lasers are hazardous to the eye if exposed directly. However, diffuse reflections are not harmful. Safe handling of devices in this class includes wearing protective eyewear where direct viewing of the laser beam may occur. In addition, laser safety signs lightboxes should be used with lasers that require a safety interlock so that the laser cannot be used without the safety light turning on. Class-3B lasers must be equipped with a key switch and a safety interlock.
This class of laser may cause damage to the skin, and also to the eye, even from the viewing of diffuse reflections. These hazards may also apply to indirect or non-specular reflections of the beam, even from apparently matte surfaces. Great care must be taken when handling these lasers. They also represent a fire risk, because they may ignite combustible material. Class 4 lasers must be equipped with a key switch and a safety interlock.
All class 2 lasers (and higher) must display, in addition to the corresponding sign above, this triangular warning sign
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Laser Safety Curtain Panels for Optical Enclosures
These laser safety fabric panels are designed for the sides of our optical enclosures, as shown in the image to the right. Alternatively, the panels can be attached to custom-built enclosures using 25 mm rails. The table on the Overview tab above shows compatible enclosure sizes for each curtain panel; if building a custom enclosure using 25 mm rails, please see the complete drawings by clicking on the red Docs icon () below.
While the fabric panel attaches to the outside of the 25 mm rails, be sure to remove the included black hardboard, which fits inside the channels of the rails, from inside. Failure to do so could cause the hardboard to ignite if exposed to a high-power laser.
All imperial curtain panels are 12.99" tall and designed for an enclosure using vertical XE25L12 rails. All metric curtain panels are 325.0 mm tall and designed for an enclosure using vertical XE25L300/M rails.
If the sizes offered here are not suitable for your enclosure application, you can request custom sizes by contacting Tech Support.
The curtain panels can be attached to the 25 mm rails using the fasteners sold separately below.
Replacement 8-32 (M4) Thumbscrews Available [Item # LPCET(/M)]
The LPCEF(/M) fastener kit contains seven sets of thumbscrews, T-nuts, and grub screws. One fastener kit is enough to affix one curtain panel to the side of a compatible enclosure. Please see the manual for instructions.
The grub screws can be tightened using a 5/64" (2.0 mm) hex key or balldriver, while the thumbscrews do not have a hex socket.
Replacement thumbscrews for the fastener kit are also available in packs of 10.