NIR Bandpass Filters - Stable Front Surface Coating, Balzers, EIS Optics, Oerlikon Optics, Unaxis

Stable Front Surface Coating, in the harshest environments

NIR Bandpass filters are used whenever there is a need to increase the signal-to-noise ratio of photodetectors (silicon). They protect detectors from undesired ambient background radiation (e.g. sunlight) or in-house illumination sources such as halogen or mercury lamps. This reduction of unwanted energy enhances detection of the target’s signal.






BENEFITS:
• Excellent environmental stability
• Minimal wavelength shift
• Various sizes and shapes, one side coating on a single glass substrate
• Various thickness available: e.g. 1.1 mm
• Design flexibility for central wavelength, half-bandwidth, blocking, according to customer's requirement

APPLICATIONS:
Machine vision, range finding (distance measurment), optical data communication, telecommunication, traffic control, automotive, safety and analytical systems.

TECHNICAL DATA:
• Central wavelenghts:
Upon customers request
• Environmental resistance and durability tests temperature:
(MIL-M-13508 C, para 4.4.4) 5h each at -62°C and +71°C
• Hardness:
(MIL-M-13508 C, para 4.4.5) 50 strokes with cheesecloth
• Adherence:
(MIL-M-13508 C, para 4.4.6) Scotch tape test
• Humidity:
(MIL-M-13508 C, para 4.4.7) 24h at 49°C and r.h. >95%
• Temperature shift:
< 0.006% of CWL per °C