Product type: Optical Longpass Filter. Application: Lighting, Medical, Optical, Photography, Astronomy.
Overview
The 26X38X3mm Hard Coated Optical Dichroic Filter is supplied as a dichroic filter made from Glass. Listed geometry: size 26.0×38.0+0/-0.2mm, thickness 3.0+/-0.2mm, square shape. Coating: Spectrophotometer; surface quality naked eye test& 15W LED cold light; flatness ZYGO interferometer. It is used in Lighting, Medical, Optical, Photography and Astronomy. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.
Specifications
| Material | Glass |
|---|---|
| Type | Optical Longpass Filter |
| Shape | Square |
| Thickness | 3.0+/-0.2mm |
| Coating | Spectrophotometer |
| Surface quality | naked eye test& 15W LED cold light |
| Flatness | ZYGO interferometer |
| Parallelism | <3arcmin |
| Clear aperture | >90% |
| Usage | Lighting, Medical, Optical, Photography, Astronomy |
| Color | Transparent |
| Principle | Dichroic Filter |
| Angle of incidence | 45° |
| Thickness Range | 2mm-5mm |
| Dimensions | 26.0×38.0+0/-0.2mm |
| ROC1 | infinity |
| ROC2 | infinity |
| Chamfer | 0.1-0.3mmx45deg |
| Standard | MIL-PRF-13830B |
| Inspection | Parameters |
| Supplier | CPG OPTICS LIMITED |
Technical data
| Items | Description | |
| Dichroic Filter | Material: | Schott N-BK7 or customized |
| Dimensions: | 26.0×38.0+0/-0.2mm | |
| Thickness: | 3.0+/-0.2mm | |
| ROC1: | infinity | |
| ROC2: | infinity | |
| Surface quality: | S1&S2:60-40 | |
| Parallelism: | <3arcmin | |
| Clear aperture: | >90% | |
| Chamfer: | 0.1-0.3mmx45deg | |
| Standard: | MIL-PRF-13830B |
| Parameters | Inspection Tools |
|---|---|
| Dimensions: | Mitutoyo Vernier caliper |
| Thickness: | Mitutoyo micrometer |
| Flatness: | ZYGO interferometer |
| Surface quality: | naked eye test& 15W LED cold light |
| Parallelism: | Thickness gauge |
| Chamfer: | magnifier X10& naked eye test |
| Coating: | Spectrophotometer |
What to specify when you request a quote
- Spectral target — state the centre or edge wavelength, the bandwidth and the minimum transmission in the passband.
- Blocking — give the blocking range and optical density (OD) the system needs.
- Angle of incidence — listed as “45°”; interference filters shift with angle, so specify the operating angle and cone.
- Size and thickness — listed as “3.0+/-0.2mm”; give outline, thickness and tolerance, and whether the filter is mounted.
- Substrate — listed as “Glass”; name the substrate glass if thermal or UV behaviour matters.
- Surface quality — listed as “naked eye test& 15W LED cold light”; quote scratch-dig for imaging paths.
Engineering guides for this part
For material grades and coating options, see Dichroic Filter Glass: Selecting Substrates for Precision Optical Separation. For an application example, read Dichroic Filter Glass for Smart Appliance Lighting Modules. A related standard product is Dichroic Filter.
