Optical IR filters Narrow bandpass optical interference filter(850nm 940nm)
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- Supplier: Changchun Jds Optics And Laser Co. Ltd.
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Product Overview
Description
Optical IR filters Narrow bandpass optical interference filter(850nm 940nm)
Product Parameter
- Common Diode, Gas, and Solid State Laser Lines
- Variety of Bandwidths for Each Laser Line
- Excellent Blocking Outside of Passband
Our Laser Line Interference Filters are available with a variety of bandwidths and transmission values to suit a multitude of laser applications. Ultra-narrow bandwidths as low as 1.0nm are ideal for eliminating noisy spontaneous emission from laser sources. Wide bandwidths are ideal for eliminating background noise when detecting the laser, improving a system’s signal-to-noise ratio. All filters are available mounted in 12.5, 12.7, 25mm, or 25.4mm diameter rings, easing handling and making them ideal for integration into OEM systems. Filters can also be easily mounted into our family of C-Mount Thick Lens Mount.
Capabilities
| Standard | Custom Options | |
|---|---|---|
| Types |
|
|
| Materials | N-BK7, UV-grade fused silica, Schott optical glass | Optical crown glass, silicon, germanium |
| Dimensions | 12.7 - 101.6 mm | 2.0 to 150.0 mm |
| Coatings |
|
|
| Quality | Standard, precision, and laser quality | See manufacturing tolerances below |
Filter Substrate Manufacturing Capabilities**
| Surface Tolerances | Precision | Laser Quality | High Precision |
|---|---|---|---|
| Surface Quality (scratch - dig) | 40 - 20 | 10 - 5 | 5 - 2 |
| Surface roughness (Å, RMS) | 20 | 5 | 1 |
| Surface Figure (P-V @ 633 nm before coating) | λ/2 | λ/10 | λ/25 |
| Dimensional Tolerances | Commercial | Precision | High Precision |
| Diameter (mm) | +0.000 / -0.250 | +0.000 / -0.100 | +0.000 / -0.010 |
| Length & width (mm) | ± 0.050 | +0.000 / -0.125 | +0.000 / -0.010 |
| Thickness (mm) | ± 0.250 | ± 0.100 | ± 0.010 |
| Angular deviation | < 5 arc min | ≤ 1 arc sec | ≤ 0.5 arc sec |
| Centration (ETV, mm) | 0.05 | 0.01 | 0.005 |
| Clear Aperture | ≥ 85% | ≥ 90% | ≥ 95% |
** Note: The general tolerance specifications above are intended to guide determination of appropriate tolerances based both on relative cost and manufacturability. Part-specific tolerances will vary depending on size, material, shape and aspect ratio. Tighter tolerances may be possible, so please contact us to discuss your custom specifications. All specifications do not need to be from a single column, though trade-offs may be required in order to meet the desired combination of cost and performance.
Bandpass Filter Capabilities
| Ultra-Narrow | Standard | Precision | High Precision |
|---|---|---|---|
| Transmission | > 90% | > 90% | > 95% |
| CWL tolerance | 0.3% | 0.2% | < 0.1% |
| Bandwidth | < 1% | < 0.5% | < 0.1% |
| Blocking | 5 OD | 6 OD | 8 OD |
| Shape factor | 20% | 25% | 40% |
| Standard | Standard | Precision | High Precision |
| Transmission | > 90% | > 95% | > 98% |
| CWL tolerance | 0.5% | 0.2% | < 0.1% |
| Blocking | 5 OD | 6 OD | 8 OD |
| Slope* | 3% | 2% | < 1% |
| Shape factor** | 20% | 30% | 50% |
| Multiband | Standard | Precision | High Precision |
| Transmission | > 90% | > 95% | > 98% |
| CWL tolerance | 1% | 0.5% | < 0.1% |
| Blocking | 5 OD | 6 OD | 8 OD |
| Slope* | 3% | 2% | < 1% |
| Shape factor** | 20% | 40% | 70% |
Kindly Remind: If you require a filter in a different size or shape, on a special substrate, or with slightly different optical properties, we can help. We regularly produce custom filters for OEM customers in high volume, and will work with you to design a filter that is optimized for your system’s technical and cost requirements. We’ve produced some pretty sophisticated filters with multiple passbands and notches, and with deep and/or extended blocking. Our ultra-steep set the industry standard for transition width and blocking. We can even produce custom neutral density filters, or create a custom filter set. = (0.3 OD point – 6 OD)/CWL
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