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IR FILTERS

HEAT REFLECTION FILTERS

The heat reflecting filters are coated on both sides for filter applications in the near infrared range. In conjunction with the glass Borofloat ®, it is suitable for applications with ambient temperatures of up to 450°C. Apart from the high temperature resistance, these are characterized by a high light transmittance. The IR4 filter has additionally an enhanced UV transmission.

Types of filters Spectral range reflecion
IR2 870 - 950 nm R ≥ 80%
IR3 850 - 900 nm R ≥ 90%
IR4 800 - 850 nm R ≥ 70%
IR5 850 - 900 nm R ≥ 94%
IR6 1000-1100nm R ≥ 85%
IR7 850 - 900 nm R ≥ 96%
Stability of the coating
Solubility, resistant to water, weak alkaline solutions, alcohol and
alcoholic solvents, glass cleaner
Temperature stability short-term up to 450 °
Abrasion resistance according to DIN ISO 9211-3; severity level 1 / Crockmeter
Adhesive stability according to DIN ISO 9211-3; severity level 3 / Scotch tape test
Moisture resistance according to DIN ISO 9211-3; 40°C 90%-95% rel. dampness, 10 days
Coating defects
5/ C 5St x 1,0 (5/ CN' x A') according to DIN ISO 10 110, part 7
referring to a surface of 100mm x 100mm C Indicator for surface errors
flaws < 0,2mm are ignored N´ the number of allowable coating defects
A´ the grade number
Scratches
5/ L 3St x 0,15mm (5/ LN´´x A´´) according to DIN ISO 10 110, part 7
referring to a surface of 100mm x 100mm L Indicator for scratches
defects < 0,05mm are ignored N´´the number of allowable scratches
A´´ the maximum tolerable width of the scratches in mm