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Filtering film
A filter is an optical component that allows light of a specific wavelength to pass through while reflecting or attenuating light from other wavelength ranges. Its advantages include high peak transmittance, a flat transmission spectrum within the passband, excellent cutoff performance across a broad wavelength range, and good stability under varying humidity and temperature conditions.
Raman filter assembly
Filter sets ensures high transmittance of Raman scattering spectrum while filtering out high-intensity laser. The filter sets are produced by the advance ion beam sputtering coating process of Veeco equipment.
Features:
High optical density
High transmittance
Ultra-steep edges
Low wave number
High laser damage threshold
Long life time
Wavelength | Model | Filter type | Dimensions (mm) | Inventory Status |
532nm | 532-AAB-54AB-3 | Laser cleaning filter | D25.4 × 2 | In stock |
25.4 × 25.4 × 2 | ||||
12.7 × 12.7 × 2 | ||||
532-LAB-90CB-3 | Long-pass edge filter | D25.4 × 2 | ||
25.4 × 25.4 × 2 | ||||
12.7 × 12.7 × 2 | ||||
532-LDAB-50AB-S | Laser dichroic filter | 25.4 × 25.4 × 2 | ||
12.7 × 12.7 × 2 | ||||
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785nm
| 785-AAB-54AB-3 | Laser cleaning filter | D25.4 × 2 | In stock |
25.4 × 25.4 × 2 | ||||
12.7 × 12.7 × 2 | ||||
785-LAB-90AB-4 | Long-pass edge filter | D25.4 × 2 | ||
25.4 × 25.4 × 2 | ||||
12.7 × 12.7 × 2 | ||||
785-LDAB-50AB-S | Laser dichroic filter | D25.4 × 2 | ||
25.4 × 25.4 × 2 | ||||
12.7 × 12.7 × 2 | ||||
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785nm Laser clean-up filter | 532nm Laser clean-up filter |
 |  |
785nm Ultrasteep long-pass edge filter | 532nm Ultrasteep long-pass edge filter |
 |  |
785nm Laser dichroic filter | 532nm Laser dichroic filter |
Linear Variable Long Wave Pass Filter
The thickness of the coating layer is not equal on the lens, and the long wave pass cutoff range shows a gradual change result on the lens. Commonly used in cutoff of grating multistage diffraction light, putting before CCD of optical fiber spectrometer. The quartz substrate was coated by ion sputtering to achieve minimum autofluorescence and high laser damage threshold.
CNI provide standard model size is 41.4mm×9.5mm×1mm.
Example of application
| 1. Connector | 2. Entrance Slit | 3. Collimating Mirror | 4. Grating | 5. Focusing mirror | 6. Continuous Variable Sorting Filter | 7. Line-scan detector (CCD) |
Test Curve
Long wave pass filter
Notch filter
Narrow notch filters are used in Raman spectroscopy and instrument amplifiers to reduce or prevent audio feedback, while having little noticeable effect on the rest of the frequency spectrum. Other names include 'band limit filter', 'T-notch filter', 'band-elimination filter', and 'band-reject filter'.
Standard product | |
| Material | BK7 / K9 / Quartz Glass |
| Paraxial Focal Length | ±2% |
Centripetal | 3 arc minutes |
Clear Aperture | >80% |
Bevel | 0.25 mm x 45° |
Surface Quality | 20-10 / 40-20 / 60-40 |
| Surface Figure | l/4 at 632.8 nm |
Test Curve
- Product Application: Mainly used in the field of biochemical laser system, fluorescence instrumentation and Raman spectroscopy.
- Material: K9, fused silica
- CNI can offer different kinds of notch filters upon your requests.
Laser Clean-up Filter
Laser clean-up filters will provide up to 90% peak transmission, center wavelength tolerances is 0.5nm. Mainly used in laser ranging, fluorescence analysis and other spectroscopic applications.
Wavelength | Model | Types of filters | Size (mm) | Stock status |
405nm | 405-AAB-36AB-3 | Laser clean-up filter | D25.4×2 | In stock |
25.4×25.4×2 | ||||
12.7×12.7×2 | ||||
| ||||
532nm | 532-AAB-54AB-3 | Laser clean-up filter | D25.4×2 | In stock |
25.4×25.4×2 | ||||
12.7×12.7×2 | ||||
633nm
| 633-AAB-58AB-3 | Laser clean-up filter | D25.4×2 | In stock |
25.4×25.4×2 | ||||
12.7×12.7×2 | ||||
| ||||
633nm
| 633-AAB-58AB-3 | Laser clean-up filter | D25.4×2 | In stock |
25.4×25.4×2 | ||||
12.7×12.7×2 | ||||
Interference Cut-off Filter
Interference cutoff filters feature a periodic structure composed of alternating high- and low-refractive-index layers. The main product types include long-wavepass and short-wavepass filters, which offer exceptional characteristics such as steep transmission slopes, stable spectral performance, and extended service life.
Longpass filter: UV–500 nm R ≥ 99.99%, 530–1200 nm T ≥ 95.99%
Shortwave-pass filter: 700–900 nm, R ≥ 99.99%; 400–680 nm, T ≥ 95.99%
Changchun New Industries Optoelectronics Technology Co., Ltd.
Address: No. 888 Jinhu Road, High-Tech Zone, Changchun, 130103, P.R.China
International Tel:+86-431-85603799
Email: sales@cnilaser.com
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