Sperian Honeywell LOTG-HENEG 3510 OTG Uncoated Blue Laser Safety Glasses
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The Sperian (Honeywell) LOTG-HENEG laser safety glasses, catalog item number 3NTT4, are an OTG (Over-The-Glass) style frame designated "astro OTG 3001," designed to fit over prescription eyewear, with uncoated light blue polycarbonate lenses made in the USA. The lens markings visible in the photos confirm multi-wavelength protection: O.D. 1–2 @ 633 nm (HeNe red laser), O.D. 4–5 @ 670–680 nm (diode red), O.D. 5 @ 10,600 nm (CO₂ infrared), and O.D. 7 @ 190–380 nm (UV), making these suitable for laboratory, medical, and industrial environments running HeNe, diode, CO₂, and UV laser systems. The visible light transmission (VLT) is approximately 40%, and the lens code "LOTG-HENE" is molded directly into the lens. Included in the original Sperian retail box are the glasses, a hard zipper case, neck cord/lanyard, and cleaning cloth. New, unused condition with original packaging intact.
Product Specifications
| Brand | Sperian (Honeywell) |
| Model / Lens Code | LOTG-HENEG |
| Manufacturer Part Number | 3NTT4 |
| Frame Style | OTG (Over-The-Glass), astro OTG 3001 |
| Lens Color | Light Blue |
| Lens Material | Polycarbonate, uncoated |
| Visible Light Transmission (VLT) | ~40% |
| O.D. @ 633 nm (HeNe) | O.D. 1–2 |
| O.D. @ 670–680 nm (Diode Red) | O.D. 4–5 |
| O.D. @ 10,600 nm (CO₂ IR) | O.D. 5 |
| O.D. @ 190–380 nm (UV) | O.D. 7 |
| Protected Laser Types | HeNe, Diode Red, CO₂, UV |
| Country of Origin | USA |
| Lot Number | 1719184 |
| Includes | Hard zipper case, neck cord, cleaning cloth |
| Condition | New in original box |