Economy Hot and Cold Mirrors: Soda-Lime Substrate
Features- Hot Mirrors for Reflecting IR and Transmitting Visible Light
- Cold Mirrors for Transmitting IR and Reflecting Visible Light
- Substrate: Soda-Lime Glass
Thorlabs Soda-Lime Hot Mirrors are perfect for keeping unwanted heat from reaching sensitive areas of your setup. In applications where heat build up is a concern, a 0° incidence hot mirror provides a means of protection by blocking the IR. Thorlabs Soda-Lime Cold Mirrors work to transmit IR energy and reflect the visible light from your setup at 90°. These mirrors are perfect for applications where the IR energy can be dumped and the visible is reflected at 90°. These mirrors are excellent for projection applications and for use as low and high pass filters. The KM100T and KM200T are ideal mounting solutions for this line of hot and cold mirrors and are compatible with both imperial and metric posts. For both types of mirrors, the coated surface should face the source. If your application requires a substrate with a lower coefficient of thermal expansion, better overall performance, or a longer lifetime, please consider our UV Fused Silica Hot and Cold Mirrors.
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| Item # | FM01, FM201 | FM02 | FM04, FM204 | FM03, FM203 |
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| Mirror | Wide Band Hot Mirror | Red Reflector | UV Cold Mirror | Cold Mirror | | Angle of Incidence | 0° | 45° | 45° | 45° | | 50% Cut-Off | 720 ± 25 nm | 580 ± 15 nm | - | - | | Transmission | >85% Avg from 450 to 645 nm | >85% Avg from 400 to 550 nm | >85% Avg from 600 to 1200 nm | >85% Avg from 750 to 1200 nm | | Reflection | >90% Avg from 750 to 1200 nm | >90% Avg from 610 to 725 nm | >90% Avg from 325 to 475 nm | >90% Avg from 420 to 630 nm | | Surface Quality | 20-10 Scratch-Dig |

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Additional Hot and Cold Mirrors
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