Product type: Notch Filter. Application: Lighting, Medical, Optical, Photography, Astronomy. Model: Filter.
Overview
Hard Coated Optical Notch Filter is a bandpass filter made from Glass. Listed geometry: diameter as required, thickness 1mm-2mm, round shape. Optical / electrical data: wavelength 355, transmittance 90. Coating: Hard Coated; surface quality 60-40. Listed for Lighting, Medical, Optical, Photography and Astronomy applications. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.
Specifications
| Material | Glass |
|---|---|
| Type | Notch Filter |
| Shape | Round |
| Coating | Hard Coated |
| Surface Quality | 60-40 |
| Usage | Lighting, Medical, Optical, Photography, Astronomy |
| Model NO. | Filter |
| Thickness Range | 1mm-2mm |
| Color | Transparent |
| Principle | Notch Filter |
| Angle of incidence | 0° |
| Clear Aperture CA (mm) | 10.6 |
| Center Wavelength CWL (nm) | 355 |
| Diameter (mm) | as required |
| Diameter Tolerance (mm) | 0/-0.1 |
| Full Width-Half Max FWHM (nm) | 17.8 |
| Full Width-Half Max FWHM Tolerance (nm) | ±1.8 |
| Optical Density OD | ≥4.0 |
| Thickness (mm) | as required |
| Thickness Tolerance (mm) | ±0.1 |
| Transmission (%) | 90 |
| Transmission Wavelength (nm) | 325 – 475 |
| Reflection at CWL (%) | 99 |
| Transmitted Wavefront, RMS | <1λ |
| Supplier | CPG OPTICS LIMITED |
Technical data
| Clear Aperture CA (mm): | 10.6 |
|---|---|
| Coating: | Hard Coated |
| Center Wavelength CWL (nm): | 355 |
| Diameter (mm): | as required |
| Diameter Tolerance (mm): | 0/-0.1 |
| Full Width-Half Max FWHM (nm): | 17.8 |
| Full Width-Half Max FWHM Tolerance (nm): | ±1.8 |
| Optical Density OD: | ≥4.0 |
| Surface Quality: | 60-40 |
| Thickness (mm): | as required |
| Thickness Tolerance (mm): | ±0.1 |
| Transmission (%): | 90 |
| Transmission Wavelength (nm): | 325 – 475 |
| Type: | Notch Filter |
| Reflection at CWL (%): | 99 |
| Transmitted Wavefront, RMS: | <1λ |
What to specify when you request a quote
- Spectral target — listed as “355”; state the centre or edge wavelength, the bandwidth and the minimum transmission in the passband.
- Blocking — listed as “≥4.0”; give the blocking range and optical density (OD) the system needs.
- Angle of incidence — listed as “0°”; interference filters shift with angle, so specify the operating angle and cone.
- Size and thickness — listed as “1mm-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 “60-40”; quote scratch-dig for imaging paths.
Engineering guides for this part
For material grades and coating options, see Precision Glass Substrates for Notch Filters: Material & Coating Selection Guide. For an application example, read Bandpass Filter Glass for Appliance Light Detection Modules. A related standard product is Bandpass Filter.
