- Outer diameter 25.0 mm, with mechanical retaining ring
- High environmental resistance, long service life
- FWHM: 3 nm, 4 nm, 5 nm, 6 nm, 7 nm
- Center wavelength: 266 nm-1064 nm
- Optical density in stop band: OD5, OD6
- Longpass Filter
- Cut-On Wavelength: 270 nm-1072 nm
- Outer Diameter 25.0 mm, with Mechanical Retaining Ring
- Angle of Incidence: 0°
LBTEK Raman long-pass filters include two types: low wavenumber Raman long-pass filters and conventional Raman long-pass filters. They are optical filters that allow light with wavelengths longer than a specific wavelength to pass through. They exhibit high transmittance (Tavg > 90%) for light longer than the starting (cut-off) wavelength and high blocking depth (ODavg > 6) for light shorter than the starting (cut-off) wavelength. The filters are pre-installed in Ø25.0 mm black anodized aluminum rings, with the light propagation direction marked by an arrow on the housing for easy installation and use. Raman long-pass filters are recommended for use at an incident angle of 0°. When used at incident angles deviating from the design angle, the starting (cut-off) wavelength may shift.
Raman long-pass filter installed on the coaxial mounting plate
Product Model | Start (Stop) Wavelength | Wave Number | Diameter | Unit Price | Curve | Compare | Lead Time | ||
|---|---|---|---|---|---|---|---|---|---|
| RET1072LP New | 1072 nm | ~96 cm-1 | Ø25.0 mm | $717.25 |  | 7 weeks | |||
| RET837LP New | 837 nm | ~132 cm-1 | Ø25.0 mm | $717.25 | | 7 weeks | |||
| RET792LP New | 792 nm | ~160 cm-1 | Ø25.0 mm | $717.25 | | 7 weeks | |||
| RET638LP New | 638 nm | ~177 cm-1 | Ø25.0 mm | $717.25 | | 7 weeks | |||
| RET493LP New | 493 nm | ~228 cm-1 | Ø25.0 mm | $717.25 | | 7 weeks | |||
| RET359LP New | 359 nm | ~368 cm-1 | Ø25.0 mm | $717.25 | | 7 weeks | |||
| RET270LP New | 270 nm | ~271 cm-1 | Ø25.0 mm | $717.25 | | 7 weeks | |||
| RET787LP-X New | 787 nm | ~72 cm-1 | Ø25.0 mm | $1074.95 | | 7 weeks | |||
| RET634LP-X New | 634 nm | ~79 cm-1 | Ø25.0 mm | $1074.95 | | 7 weeks | |||
| RET533LP-X New | 533 nm | ~94 cm-1 | Ø25.0 mm | $1074.95 | | 7 weeks | |||
| RET489LP-X New | 489 nm | ~125 cm-1 | Ø25.0 mm | $1074.95 | | 7 weeks | |||
| RET537LP New | 537 nm | ~209 cm-1 | Ø25.0 mm | $717.25 | | 7 weeks |
- Longpass Dichroic Mirror
- Reflection Cutoff & Transmission Start Wavelength: 266 nm-785 nm
- Ø25.0 mm (Mounted), Ø25.0 mm (Unmounted), 36 mm x 25.5 mm
- Incidence Angle: 45°
LBTEK Raman long-pass dichroic mirrors are filters that allow long wavelengths to pass through while reflecting or absorbing short wavelengths. They exhibit high transmittance (Tavg > 90%) for light with wavelengths longer than the cut-on (cut-off) wavelength and high reflectance (Ravg > 90%) for light with wavelengths shorter than the cut-on (cut-off) wavelength. Raman long-pass dichroic mirrors are available in two types: mounted (Ø25.0 mm) and unmounted (Ø25.0 mm & 36 mm x 25.5 mm). For the mounted version, an arrow (↑) engraved on the housing indicates the direction of light propagation, while for the unmounted version, an arrow (>) on the side indicates the direction of the coated surface, facilitating installation and use. Raman long-pass dichroic mirrors are recommended for use at an incident angle of 45°. If the incident angle deviates from the design angle, the cut-on (cut-off) wavelength will shift.
The Raman dichroic mirror is installed on the coaxial mounting plate.
Product Model | Start (Stop) Wavelength | Wave Number | Size | Unit Price | Curve | Compare | Lead Time | ||
|---|---|---|---|---|---|---|---|---|---|
| RT633RDC New | 633 nm | 158 cm-1 | Ø25.0 mm (with mounting) | $764.44 | | 7 weeks | |||
| RT532RDC New | 532 nm | 209 cm-1 | Ø25.0 mm (with mounting) | $764.44 | | 7 weeks | |||
| RT785RDC-R New | 785 nm | 120 cm-1 | 36.0×25.5 mm （L×W） | $764.44 | | 7 weeks | |||
| RT633RDC-R New | 633 nm | 158 cm-1 | 36.0×25.5 mm （L×W） | $764.44 | | 7 weeks | |||
| RT532RDC-R New | 532 nm | 209 cm-1 | 36.0×25.5 mm （L×W） | $764.44 | | 7 weeks | |||
| RT488RDC-R New | 488 nm | 187 cm-1 | 36.0×25.5 mm （L×W） | $764.44 | | 7 weeks | |||
| RT355RDC-R New | 355 nm | 468 cm-1 | 36.0×25.5 mm （L×W） | $764.44 | | 7 weeks | |||
| RT266RDC-R New | 266 nm | 271 cm-1 | 36.0×25.5 mm （L×W） | $764.44 | | 7 weeks | |||
| RT785RDC-UM New | 785 nm | 120 cm-1 | Ø25.0 mm (Not Installed) | $764.44 | | 7 weeks | |||
| RT532RDC-UM New | 532 nm | 209 cm-1 | Ø25.0 mm (Not Installed) | $764.44 | | 7 weeks | |||
| RT266RDC-UM New | 266 nm | 271 cm-1 | Ø25.0 mm (Not Installed) | $764.44 | | 7 weeks |
- Center Wavelength: 266 nm-1064 nm
- FWHM: 3 nm, 4 nm, 5 nm, 6 nm, 7 nm
- Stopband Optical Density: OD5, OD6
LBTEK offers CHROMA Raman Filters with a diameter of 25 mm and mechanical retaining rings. The mechanical retaining rings are marked with arrows indicating the incident direction, with light coming along the arrow direction for easy installation and use. When the incident angle deviates from the designed angle, the center wavelength may shift. It is recommended to use at the designed angle.
Product Model | Center wavelength | Full Width at Half Maximum (FWHM) | Passband transmittance | Unit Price | Curve | Compare | Lead Time | ||
|---|---|---|---|---|---|---|---|---|---|
| RET785/3x New | 785 nm | 3 nm | Tabs>90%@785 nm | $717.25 | | 7 weeks | |||
| RET633/3x New | 633 nm | 3 nm | Tabs＞90%@632.8 nm | $717.25 | | 7 weeks | |||
| RET532/2x New | 532 nm | 2 nm | Tabs＞90%@532 nm | $717.25 | | 7 weeks | |||
| RET1064/7x | 1064 nm | 7 nm | Tabs＞90%@1064 nm； | $717.25 | | today | |||
| RET830/6x | 830 nm | 6 nm | Tabs＞93%@830 nm； | $717.25 | | today | |||
| RET785/6x | 784.5 nm | 6 nm | Tabs＞93%@785 nm； | $717.25 | | today | |||
| RET633/5x | 632.3 nm | 5 nm | Tabs＞93%@632.8 nm； | $717.25 | | 8 weeks | |||
| RET532/4x | 532 nm | 4.5 nm | Tabs＞93%@532 nm； | $717.25 | | today | |||
| RET488/4x | 487.7 nm | 4.2 nm | Tabs＞93%@488 nm； | $717.25 | | today | |||
| RET355/3x | 355 nm | 3 nm | Tabs＞88%@355 nm； | $717.25 | | today | |||
| RET266/3x | 266 nm | 3 nm | Tabs＞55%@266 nm； | $717.25 | | today |
Address：Building A6, Huanchuang Enterprise Plaza, Yuelu Idstrict, Changsha
Email: service@lbtek.com、sales@lbtek.com
Tel: 400-060-6986 (Mon-Sun 9:00-18:00)
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