Date：2019-06-25 Click：563
Wendi has been a leading manufacturer of high performance optical interference filters for a wide range of applications in Raman spectroscopy.
Product Advantages
■ High transmission - to detect the weakest Raman scattering signal (＞98% typical);
■ Deep blocking - for maximum Rayleigh scattering rejection (＞OD6);
■ Curve is extremely steep & minimal transition width - to detect the smallest Raman shift;
■ Single-layer substrate coating & Excellent film firmness;
■ Strong damage resistance and a nearly unlimited lifetime;
Typical Raman Spectroscope Layout
Measured Spectrum – A Raman Filter Set to Block 785nm
General Specifications
|
Parameter |
Value |
Comment |
|
Transition Width |
＜1.2 λlaser |
/ |
|
Blocking at Laser Wavelength |
＞OD6 |
/ |
|
Averaged Transmission |
＞93% |
Averaged over the passband |
|
Minimum Transmission |
＞90% |
Over the passband |
|
Angle of Incidence |
0°±2° |
/ |
|
Diameter/mm |
7, 12.5, 25 |
Accept custom size |
|
Clear Aperture |
＞80% |
/ |
|
Thickness/mm |
3.5±0.1 |
Mounted in black-anodized aluminum ring |
|
Surface Quality |
60-40 Scratch-Dig |
/ |
|
Reliability & Durability |
Environmental: MIL-STD-810F, Physical: MIL-C-48497A |
|
|
Orientation |
The arrow on the ring indicates the recommended direction of propagation of light. |
|
Typical Raman Filter Sets
|
Laser Wavelength |
Laser-line Filters |
Dichroic Mirrors |
LWP Edge Filters |
Transition Width |
|
532 nm |
BP532/2 |
DLWP537 |
LWP537 |
＜175 cm-1 |
|
632.8 nm |
BP632.8/2 |
DLWP639 |
LWP639 |
＜153 cm-1 |
|
785 nm |
BP785/3 |
DLWP793 |
LWP793 |
＜132 cm-1 |
|
832 nm |
BP832/3.2 |
DLWP839 |
LWP839 |
＜129 cm-1 |
|
1064 nm |
BP1064/4 |
DLWP1074 |
LWP1074 |
＜88 cm-1 |
