1.IR filters 2.widely used in aesthetics. 3.can be with or without coating.
IR Filters
Optical filters, generally, belong to one of two categories. The simplest, physically, is the absorptive filter, while our filters are mainly for dichroic filters. Optical filters selectively transmits light having certain properties (often, a particular range of wavelengths, that is, range of colours of light), while blocking the remainder.
Attribute | Specification |
Material | BK7, K9, Fused Silica, etc. |
Typical Diameter (mm) | ≥2.0mm |
Diameter Tolerance (mm) | ±0.02mm |
Typical Thickness (mm) | ≥0.1mm |
Thickness Tolerance (mm) | ±0.01mm |
Clear Aperture | >90% |
Flatness (per 25mm@633nm) | λ/10 |
Incidence Angle | 0° or 45° |
Surface Quality | 10/5 |
Parallelism | 30 arc seconds |
Bevel (face width x 450) | <0.25mm |
IR Filters
