Longpass Filter, Colored-Glass Alternative, 2x2 in., 850 nm Cut-on
The 20CGA-850 Colored-Glass Alternative Filter is a 2 inch (50.8 mm) square long-pass filter with a 850 ± 8.0 nm cut-on wavelength. Colored-Glass Alternative filters have a steep transition between the region of transmission and rejection (blocking) that is much steeper than colored glass filters. Colored-Glass Alternative filters have out-of-band rejection ≥OD 5 to 200 nm. Typical transmission is ≥90% average.
Specifications
Type
Colored Glass Alternative Longpass Filter
Optic Size
50.8 x 50.8 mm
Cut-on Wavelength
850 nm
Cut-on Wavelength Tolerance
±8 nm
Effective Index of Refraction
1.8
Surface Quality
80-50 scratch-dig
Thickness
1.1 mm
Thickness Tolerance
±0.1 mm
Size Tolerance
±0.25 mm
Clear Aperture
≥90% of filter size with film-to-the-edge
Temperature Range
-100 to 400°C
Humidity Resistance
MIL-STD-810, Method 507.3, Procedure III, Modified to 40 cycles
Abrasion, Adhesion, Hardness
MIL-C-48497
Cleaning
Type
Colored Glass Alternative Longpass Filter
Optic Size
50.8 x 50.8 mm
Cut-on Wavelength
850 nm
Cut-on Wavelength Tolerance
±8 nm
Effective Index of Refraction
1.8
Surface Quality
80-50 scratch-dig
Thickness
1.1 mm
Thickness Tolerance
±0.1 mm
Size Tolerance
±0.25 mm
Clear Aperture
≥90% of filter size with film-to-the-edge
Temperature Range
-100 to 400°C
Humidity Resistance
MIL-STD-810, Method 507.3, Procedure III, Modified to 40 cycles
Abrasion, Adhesion, Hardness
MIL-C-48497
Cleaning
