Interference Filter(Band Pass Filter)
Interference Filters are optical filters used in blood analysis and observation of immune reactions.Only fluorescence is extracted from the light, which is a mixture of the excitation light that causes the reaction and the fluorescence generated as a result of the reaction.
If you specify the center wavelength, FWHM, and blocking range, we can manufacture custom filters to meet your requirements, such as narrow bandpass filters with a FWHM of 1.0 nm and filters with a maximum transmittance of 90% or higher.
Normally, it can only block a certain range of wavelengths. However, when combined with a blocking filter using a metallic film, a colored glass filter, or a cut filter, it is possible to block the entire wavelength range.
They are used in fluorescence testing devices, blood analyzers, immunoassay devices, and life science analyzers.
Interference Filter
dielectrical BPF+ metallic BR type
This filter is a combination of a bandpass filter of dielectric film and a blocking filter of metal film.
It is capable of blocking light in the entire wavelength range except for the specified transmission band, and has low transmittance but excellent signal-to-noise ratio (SNR).
- Diameter : φ12+0/-0.1×5.0±0.1t(with ring)
- Clear aperture : ≧φ8
- Angle of Incidence : 0°
Specifications
| center wavelength(nm) | center wavelength tolerance | FWHM | Max transmittance | Blocking |
| 340 | ±2.0nm | 10±2nm | ≧35% | ≦0.01% |
| 405 | ±2.0nm | 10±2nm | ≧35% | ≦0.01% |
| 415 | ±2.0nm | 10±2nm | ≧35% | ≦0.01% |
| 450 | ±2.0nm | 10±2nm | ≧35% | ≦0.01% |
| 490 | ±2.0nm | 10±2nm | ≧35% | ≦0.01% |
| 540 | ±2.0nm | 10±2nm | ≧35% | ≦0.01% |
| 570 | ±2.0nm | 10±2nm | ≧35% | ≦0.01% |
| 600 | ±2.0nm | 10±2nm | ≧35% | ≦0.01% |
| 630 | ±2.0nm | 10±2nm | ≧35% | ≦0.01% |
| 650 | ±2.0nm | 10±2nm | ≧35% | ≦0.01% |
| 700 | ±3.0nm | 10±2nm | ≧35% | ≦0.01% |
| 750 | ±3.0nm | 10±2nm | ≧35% | ≦0.01% |
*Avoid prolonged use in places with high temperature and humidity, or in places where the temperature is below 50°C.
*The characteristics shift to the short wavelength side depending on the angle of incident light.
*We can design and manufacture to your specifications.