We purchased three LG11 laser safety glasses around 2014. ), This chart from PerriQuest shows how colors shift when seen through the lens. (1) 635 nm, 5 mW, CW, beam diameter: 0.9 mm A description of each class of laser is given below: Note: The LG11 and LG11A are made using Schott glass, and therefore use a different frame design than our other Universal style laser glasses. The Air Force Aircrew Laser Eye Protection (ALEP) program. There are two ways to use the table above: start with the scale number and calculate the maximum safe power density or start with a power density and calculate the minimum safe scale number. Eye injuries may occur if you directly view the beam, especially when using optical instruments. Refer to the, The OD and LB-Rating Specifications are determined by the filters in the glasses, NoIR model # DYE. Hello, It is necessary to confirm that laser safety goggles meet the requirements of your laser safety officer on site. The symbol you use here is commonly referred to as "chinese export" and is usually used on very cheap and unsafe products. This unclassified document describes many of the characteristics of anti-laser glasses used by the Air Force. 325 laser safety glasses were primarily developed for protection from laser wavelength 532 nm (KTP, Argon, and green light lasrs) offering high visibility when using lasers operating within that wavelength. I am using a Bosch Laser distance measurer model GLR 225. For your second comment, we had a graphical chart in our most recent catalog that I believe would aid in the selection process. or from other companies. Rbert. The UVC radiation system we are using for surface disinfection has a high irradiation intensity of 70 mW/cm at 254 nm (in a 2 cm distance from the quartz glass plate). OD and LB-Rating specifications for the LG11 and LG11A are printed on the frame. A response from Tyler at Thorlabs to jdonnelly: The LG1 laser glasses are not rated at 1500 nm. Example 1: The LG3 laser safety glasses have an LB-Rating line that reads "180-315 D LB7 + IR LB4". The laser mode designation is based on the duration of laser pulse emitted by the laser. Do you sell the sheath separately? Dear Thorlabs, Best, The hooks are plastic and cannot be bent to grip my ears better. Thank you for your kind support, Hi, In terms of spectral filtering LG2 seems to do the job but could it be that the visibility is too reduced? Glas-filter(coated) (2) 1152 nm: LG11 (OD 7+) Response from Laurie at Thorlabs to sebastian.marschall: Unfortunately, we do not have data on the LG1 goggles beyond 1050 nm. Could you suggest which glass is suitable for working free-space optic setup with 780nm laser diode and 633nm HeNe laser application and also comply with safety requirement? I need protection from 532 nm in addition to the spec, any solutuon? Our LG1 glasses have an Optical Density >7 at 1064 nm and are among our cheaper options for laser safety glasses. Actually, any of our LG series laser safety glasses would work well for eye protection in the 180-320 nm range. Please contact TechSupport@thorlabs.com if you have any questions. Hello, thank you for contacting Thorlabs. Fit over prescription glasses may be affected (see the Frame Styles tab for details). Each pair of laser safety glasses comes with a protective storage case, cleaning cloth, and adjustable neck strap. While Thorlabs cannot formally recommend specific laser safety glasses, we suggest checking on the suitability of the LG11 for your application with your local Laser Safety Officer since it has an OD spec of 7+ for both wavelengths of interest. Hello, thank you for contacting Thorlabs. Response from Tim at Thorlabs: Thank you for contacting us. 800-1100nm OD 7+ 37%VLT YG4 m12 1311 milwaukeetool bracket Do you have a model of glasses suitable for our needs? Please keep your laser glasses in the lab where they are needed. Response from Tim at Thorlabs: Thank you for contacting us! cel: 514-238-9059. For M ratings of LB6 and LB7 in the corresponding wavelength ranges, the glasses were tested at pulses between 12ps and 170 fs. What should be done about laser pointers? Please see the Specs Tutorial for a description of this calculation. Thank you! These laser safety goggles can protect against accidental exposure to green or blue laser beam. We recommend selecting the highest possible optical density (OD) for the wavelengths you need to block. If you are concerned about seeing your 405nm beam during alignment, please consider one of our viewing cards like the VRC1. 3. 4. wavelength Range (nm) 750-1000, THORLABS Range/optical Density(OD) >740 to 1070 nm OD= 7+, Typical Wavelength = 760 -930 nm. 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. Thanks in advance for your time, Products used for cleaning prescription eyeglasses are safe to use with our laser safety glasses. Laser goggles designed for specific wavelengths should be clearly available near laser setups to protect the wearer from unintentional laser reflections. It should be noted that green laser pointers and multiplex lasers are not toys. Response from Buki at Thorlabs: I'm not sure what pair to select, the LG4 covers the range but would they cut out to much light for teh low powered diode to be visable? Hello The interior is 145mm x 53mm and have a 140mm temple. This has more information about ALEP Block 2. The Pervasive Threat of Green Laser Illuminations and the Need for the Robust Military, Tactical and Aviation Eye Protection Found in Revisions LazrBloc. targeting distance laser global lasers As a result, when the LG3 laser safety glasses are being used in this situation the maximum power density of the light source should not exceed 3x105 J/m2. Sarah. ", LaseReflect Aviator glasses reflect up to four wavelengths,with high visibility between these wavelengths. As of July 2011, there are three models. Are there any precautions I need to take about laser beams from the side? Refer to the, The OD and LB-Rating Specifications are determined by the filters in the glasses, NoIR model # RB2. I need to buy safety glasses for the engineers but cannot determine which one is the right one. Filter specifications are permanently engraved. The current EN 207 L ratings are still valid. All class 2 lasers (and higher) must display, in addition to the corresponding sign above, this triangular warning sign. Please contact us for more information about this laser filter and appropriate viewing conditions was well as wavelengths that may not be visible because of these laser glasses. I will contact you directly in case you have further questions. Hi, The photo-illustrations below give an idea of how LGP glasses work: There are three main technologies used to make LEP and LGP eyewear: How to select and evaluate Laser Glare Protection eyewear. Optical density: 512-532nm OD>=9 Javier Tovar. Response from Bweh at Thorlabs USA: The LG11 has a different frame style because at this time, it is difficult to cut the glass that is used to the shapes that fit the universal frames. The IEC document 60825-1 outlines the safety of laser products. laser line module (The manufacturer did not specify if this simulates the Night or Day version. Assuming you are working with a 2mm beam diameter at 100mW, 473nm and 593nm, both CW, these fall under the same calculation class. Hi, Miscellaneous laser info / High power; projectors; weapons, Laser dazzle and glare / A scientific definition / ion-ios-flower, Links / Articles, websites, courses / ion-link, About LaserPointerSafety.com // ion-person, Sponsorship opportunities / Help support LaserPointerSafety.com / ion-trophy, Eyewear Helps Thwart Laser-Pointer Attacks. 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