1. Features
- High optical density, high transmittance, and excellent performance for a variety of industrial applications.
- Low temperature shifts, ensuring stable performance even under fluctuating environmental conditions.
- Strong, durable film layer that resists damage and maintains its functional integrity.
- High precision with narrow bandwidth filters, ideal for specific wavelength selection.
- Customizable models to suit specific application needs.
2. General Description
The Broad Bandpass Filter by Shape Optics Technologies Pte Ltd (SOT) is a precision optical filter used to transmit a specific range of wavelengths while blocking others. These filters are essential for applications in scientific research, industrial sorting, optical imaging, and other areas where precise wavelength control is required. These filters feature high transmittance and minimal optical density outside the selected bandpass range. They are constructed using advanced materials that enhance durability, including strong films that resist abrasions, chemicals, and environmental wear. With customizable specifications such as center wavelength (CWL), full width at half maximum (FWHM), and optical density (OD), these filters can be tailored to meet the exact needs of various applications such as laser scanning, optical measurements, and machine vision systems.
3. Spectrum Transmission Curves
Our broad bandpass filters are available in a variety of center wavelengths and bandwidths, ranging from near-ultraviolet to infrared wavelengths. Each filter provides exceptional transmission within the designed band and blocks unwanted wavelengths. Customization is available to suit specific needs or optimize performance for particular systems.
4. Coating Quality
- Adhesion Test: In compliance with MIL-C-675C military standards, the adhesion test involves applying tape meeting LT-90 specifications to the lens film layer. After vertical removal, the procedure is repeated three times with no blistering or peeling observed.
- Temperature Test: In line with MIL-C-675C standards, test pieces are subjected to -62±1℃ and 71±1℃ temperatures. After two hours at room temperature (16℃ to 32℃), the adhesion test is repeated with no film detachment confirmed.
- Abrasion Resistance: Conforming to MIL-C-675C and CCC-C-440 standards, the test involves applying a force of 1.0 lbs (0.45 kg) to the film, repeated 25 times with no surface damage observed.
- Humidity Test: Under MIL-C-675C standards, test pieces are placed in a controlled chamber set to 49 ±2℃ and 95%-100% humidity for 24 hours. No peeling or scratches occur.
- Solvent and Cleaning: Following MIL-C-675C specifications, test pieces are exposed to acetone and alcohol for 10 minutes each, cleaned with alcohol-soaked cotton cloth, and show no surface damage.
- Salt Spray Test: After 100 hours in a 35°C environment with 5% saltwater, no damage to the film is observed.
5. Standard Specifications
The following specifications highlight the available models of the broad bandpass filters based on wavelength and key performance parameters:
| Model | CWL (nm) | Transmittance | FWHM (nm) | Optical Density | Note |
| NH-BP365 | 365±5 | ≥90% | 20-60 | OD≥3@350-1100 | |
| NH-BP405 | 405±5 | ≥90% | 20-60 | OD≥3@350-1100 | |
| NH-BP460 | 460±3 | ≥90% | 20-60 | OD≥3@350-1100 | |
| NH-BP505 | 505±5 | ≥90% | 20-60 | OD≥3@350-1100 | |
| NH-BP545 | 545±5 | ≥90% | 20-60 | OD≥3@350-1100 | |
| NH-BP550 | 550±5 | ≥90% | 20-60 | OD≥3@350-1100 | |
| NH-BP590 | 590±5 | ≥90% | 20-60 | OD≥3@350-1100 | |
| NH-BP650 | 650±5 | ≥90% | 20-60 | OD≥3@350-1100 | |
| NH-BP700 | 700±5 | ≥90% | 20-60 | OD≥3@350-1100 |
6. General Applications and Examples
These filters find use in various applications including:
- Laser Scanning: Precise wavelength selection for laser scanning in industrial applications.
- Optical Measurements: Utilized in research and development for optical characterization.
- Machine Vision: Essential in machine vision systems to select specific wavelength bands, crucial for accurate image processing.
- Biochemical Analysis: In laboratory instruments requiring specific light band transmissions for sample analysis.
The broad bandpass filters are suitable for applications in fields such as industrial sorting, environmental sensing, color analysis, and scientific research.
7. SOT Strengths and Capabilities
Shape Optics Technologies Pte Ltd (SOT) specializes in the design, development, and manufacturing of advanced optical filters. With over a decade of experience, SOT is a leader in providing high-quality filters that meet the most stringent performance criteria. Our engineering team is committed to innovation and continuous improvement, ensuring our products deliver reliable performance in complex optical systems. Our custom filter designs cater to industries ranging from industrial automation to scientific research, offering solutions that are tailored to client-specific requirements.
8. Standard Products
The following models of broad bandpass filters are part of our standard product line:
| Model | CWL (nm) | Transmittance | FWHM (nm) | Optical Density |
| NH-BP1050 | 1050±5 | ≥90% | 20-60 | OD≥3@350-1100 |
| NH-BP1200 | 1200±5 | ≥90% | 20-60 | OD≥3@350-1100 |
| NH-BP1300 | 1300±5 | ≥90% | 20-60 | OD≥3@350-1100 |
| NH-BP1500 | 1500±5 | ≥90% | 20-60 | OD≥3@350-1100 |
(Other models can be customized based on application.)
Ready to order or need customization?
If you need specific customization or additional models, Shape Optics Technologies Pte Ltd offers consultation and product tailoring to suit your precise requirements
