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A new series of protective sapphire windows for 1µm optics that offer superior durability to zinc-sulfide and fused silica lenses is being introduced by Laser Research Optics. Laser Research Fiber Laser Sapphire Windows feature Moh 9 hardness, which is second only to diamond, making them more durable and scratch-resistant than zinc-sulfide and fused silica windows. A longer lasting replacement for debris shields and reducing the number of lens changes, these sapphire windows are capable of withstanding steel splatter, flash, and debris.
Available in 1" to 2" sizes, Laser Research Fiber Laser Sapphire Windows have a 10-5 scratch-dig finish, ¼ wave flatness, A/R coatings on both sides, and provide greater than 99.5 percent transmission @ 1.07µm, with greater than 90 percent @ 650-670 nm. Fused silica UV grade windows coated on one or two sides are also offered.
Related Glossary Terms
- flash
flash
Thin web or film of metal on a casting that occurs at die partings and around air vents and movable cores. This excess metal is due to necessary working and operating clearances in a die. Flash also is the excess material squeezed out of the cavity as a compression mold closes or as pressure is applied to the cavity.
- hardness
hardness
Hardness is a measure of the resistance of a material to surface indentation or abrasion. There is no absolute scale for hardness. In order to express hardness quantitatively, each type of test has its own scale, which defines hardness. Indentation hardness obtained through static methods is measured by Brinell, Rockwell, Vickers and Knoop tests. Hardness without indentation is measured by a dynamic method, known as the Scleroscope test.
