832nm Laser Line Bandpass Filter
832nm laser line bandpass filter is specially designed filter for NIR 832nm laser source. Coligh manufactures high performance laser line filters for Raman and various applications.
832nm laser line bandpass filter with 3.2nm FWHM is a key optical components of high precision spectroscopy analysis. It has the features below:
- Center wavelength 832nm to match the mainstream laser.
- FWHM 3.2nm to ensure the high efficiency use of laser energy
- Blocking depth OD>6 to suppress non-excitation bands
- High transmission 95% at 832nm
- Hard Coating
832nm Laser Line Bandpass Filter Description
When dealing with near-infrared laser light sources, the 832/3.2nm laser line filter can accurately filter the laser wavelength, allow a certain range of light to pass through, and effectively filter out unwanted stray light. The 832/3.2nm laser line bandpass filter produced by Coligh has a central wavelength of 832nm and can only transmit light of 832nm, which can obtain the best Raman signal. In addition, it can allow light in the range of 832+/-1.6nm to pass through. In some experiments that require a wider wavelength tolerance, this bandwidth design is very good.
The cutoff depth OD>6 of this filter and the transmittance of >95% at 832nm can effectively reduce the direct scattered light of the laser, improve the signal-to-noise ratio of the signal, and avoid interference with the Raman signal. At the same time, it can reduce the fluorescence background interference of certain biological samples and organic compounds. 832nm is a typical near-infrared laser wavelength. In Raman spectroscopy, the fluorescence effect can be reduced by matching the 832/3.2nm laser line bandpass filter. The process of hard-coated interference filter can make the filter very durable and provide higher film uniformity and stability.
832nm Laser Line Bandpass Filter Spectrum Performance
832nm Laser Line Bandpass Filter Technical Datasheet
| Center wavelength: | 832nm | Coating | Hard-coated |
| Full Bandwidth half maximum | 3.2nm | Angle of Incidence | 0 +/-2 deg |
| Transmission Peak | Average>93% | Size avaliable | Dia12.5nnm Dia 25mm, or custom |
| Optical Density | OD>6 | Substrate thickness | 1.0mm unmounted |
| Clear Aperture | >80% of diameter | Mounted Option | Mounted in Black Anodized Ring |
| Surface quality | 60-40 | Mounted thickness | 3.5+/-0.1mm |
| Environmental and Physical Durability | MIL-STD-810F, MIL-C-48497A | ||
832nm Laser Line Bandpass Filter Applications
832/3.2nm laser line bandpass filters are very useful in multiple application scenarios, such as:
- In Raman spectroscopy, Raman scattered light carries information about the vibration mode of sample molecules. 832/3.2nm laser line filters can ensure the wavelength of laser light sources is accurate, especially for Raman analysis of near-infrared lasers
- When analyzing cells and tissues by Raman spectroscopy, 832nm laser line filters can reduce the fluorescence interference of samples, especially for cell component analysis, cancer diagnosis and molecular imaging
- In materials science, 832/3.2nm laser line filters can accurately excite material samples to study the molecular structure, chemical composition and physical properties of different materials
- In laser systems and spectrometers, 832/3.2nm laser line filters can effectively control the wavelength of laser beams, ensure the stability and purity of laser wavelengths, and are suitable for equipment such as laser spectrometers and spectroscopic analysis systems
