Balluff offers several specific filters for cameras. The hot mirror filter is part of the standard delivery condition.
Hot Mirror Filter
The hot mirror filter has great transmission in the visible spectrum and blocks out a significant portion of the IR energy.
The average transmission is specified to be more than 93% from 425 to 675 nm and average reflectance is more than 95% from 750 to 950 nm at normal incidence. Custom angles of incidence can be designed to specification.
Cold mirror filter
The high-quality daylight cut filter has optically polished surfaces. The polished surface allows the use of the filter directly in the path of rays in image processing applications. The filter is protected against scratches during the transport by a protection film that has to be removed before the installing the filter.
Half maximum transmission is at 750 nm. This means that the visible light is blocked, infrared light is let through with high transparency. So, the filter is suitable for applications with High-Power-LED-illuminations, as their wavelengths are about 850 or 880 nm.
| Technical data |
| 2000nm compared to bright acryl |
| Tolerances by +/-0.1 mm |
| Light transmission of 96% from 800 to 2000nm compared to bright acryl |
| Strengths of 0.5 mm |
| Steep Cut-on-curve |
Glass filter
It is also possible to choose a glass filter with following characteristics:
| Technical data | |
| Glass thickness | 1.0 mm |
| Material | Borofloat without coating |
| ground with protection chamfer | |
| Surface quality | polished on both sides P4 |
| Surface irregularity | 5/3x0.06 on both sides |
