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Filtres / Miroirs Chauds & Froids

Andover

Une utilisation combinée de miroirs chauds et froids peut permettre d’éliminer essentiellement 99% du rayonnement généré par les systèmes de lumière de forte puissance. Le miroir froid, monté à un angle d'incidence de 45°, transmet une grande partie de la chaleur tout en réfléchissant la lumière visible. Le miroir chaud, monté perpendiculairement au faisceau lumineux, reflète la chaleur restante tout en transmettant 90 % de la lumière visible

Caractéristiques

Les miroirs froids transmettent le proche infrarouge et reflètent la lumière visible
Les miroirs chauds reflètent le proche infrarouge et transmettent la lumière visible
Ensemble, ils refroidissent efficacement les systèmes de lumière de grande puissance

Caractéristiques techniques

General Specification
Thickness	3.0±0.5 mm (6.0±0.5 mm for IR Suppressing)
Size Tolerance	+0.0/-0.5 mm
Min. Clear Aperture	95% of outside dimension
Substrate Material	Borosilicate glass
Flatness	5-10 waves per 25 mm
Parallelism	3 arc minutes or better
Surface Quality	80/50 per MIL-O-13830
Humidity and Abrasion	Per MIL-C-675A
Max. Operating Temperature	+200 °C (+100 °C for IR suppressing)
Mechanical	Unmounted
Optional	Mounted in threaded ring - contact our expert on the right for thread sizes

All filters are available in 12.5, 25.0, 50.0 mm Ø and 50.0 mm SQ.

Filter Type	Part Number	Transmission Curve
Hot Mirrors
Hot mirrors are heat-reflecting filters designed to transmit visible wavelengths and reflect near-infrared heat-generating wavelengths. Andover's hot mirrors have hard, first-surface dielectric coatings that meet or exceed the humidity and abrasion specifications listed above. The coatings are deposited onto a low-expansion material such as borosilicate glass to prevent cracking or crazing from high heat applications	775FW82
Ultraviolet Cold Mirrors
Ultraviolet mirrors differ slightly from the standard cold mirror in that they reflect the ultraviolet and transmit the visible and infrared. They are excellent for applications that call for separating the ultraviolet from the visible and near infrared.	375FV86
Cold Mirrors
Cold mirrors are heat-transmitting filters designed to reflect visible wavelengths and transmit near-infrared wavelengths. Andover’s cold mirrors have first-surface coatings that are deposited onto a low-expansion material such as borosilicate glass.	645FK84
850 nm Cold Mirrors
This version of the cold mirror is identical to the standard cold mirror, but with the reflection range extended to 850nm. It has excellent transmission throughout the NIR region.	850FK84
Infrared Suppressing Filters
These filters extend the blocking of standard hot mirrors across the infrared range using a combination of reflection from the dielectric stack and absorption from an infrared-absorbing filter glass. Because of this absorption factor, these filters are suitable only in low-power applications with a maximum filter temperature of 100°C.	800FB72