Optical Narrow Bandpass Filter 450nm For Optical Coherence Tomography

An optical narrow bandpass filter 450nm is a specialized device that allows only a limited range of wavelengths around 450 nanometers (nm) to pass through. It works by selectively filtering out unwanted wavelengths while transmitting the desired degree of wavelengths, making it useful in various applications such as fluorescence microscopy, where specific wavelengths of light are required to excite fluorescent molecules, or in colorimetry, where precise color discrimination is needed.

 

UVWAVETEK offers quality-guaranteed 450nm optical filters with high transmission levels and clean and accurate spectral output signal. The filters are made from high-quality optical materials to minimize distortion, scattering, and other optical artifacts that can affect the quality of the output signal. What’s more, they are robust and durable enough to withstand the environmental conditions of the application. Contact us today to select the best filter for your specific application requirements!

 

Features

- Ultra-narrowband

- High level of transmission rate

- High contrast

- Hard durability

- Stable environmental coating

- ISO9001, ROHS certified

 

Parameters

Product Name	450nm narrow bandpass filter
Central Wavelength (CWL)	450nm
FWHM	10nm or custom
Diameter	25mm or custom
Thickness	1mm or custom
Transmission Rate	>90%
Blocking Depth	OD6 or custom
Coating	Hard-film coating
Tolerance	±0.01-0.1mm
Wavelength Range:	200-1100nm

 

Spectrum transmission curve

 

Applications

450nm narrow bandpass filters have numerous applications in various fields where precise spectral filtering is required. They are essential components in many scientific instruments and devices, and their versatility and precision make them useful in a wide range of applications:

- Photolithography

- Remote sensing

- Laser applications

- Astronomy

- Biomedical imaging

 

How does a 450nm bandpass filter apply in optical coherence tomography (OCT)?

Optical coherence tomography (OCT) is a non-invasive imaging technique that uses light waves to generate high-resolution, cross-sectional images of biological tissues. Optical narrow bandpass filters 450nm are commonly used in OCT systems to isolate the specific wavelength of light used for imaging.

 

In OCT, a low-coherence light source illuminates the tissue being imaged, and the backscattered light is detected and analyzed. The detected signal construct a three-dimensional tissue structure image.

 

To generate high-quality images, using a narrow bandwidth light source that provides a high axial resolution is essential. Narrow bandpass filters filter out unwanted wavelengths and provide a biased bandwidth light source, allowing for the precise imaging of the tissue structure.

 

Moreover, the 450nm wavelength is commonly used in OCT imaging because it is absorbed by certain pigments, such as melanin, allowing for improved imaging of tissues that contain these pigments. Additionally, the 450nm wavelength is less scattered by biological tissues than longer wavelengths, resulting in less signal attenuation and improved imaging depth.

 

Narrow bandpass filters at 450nm are also used in spectral domain OCT (SD-OCT) systems, which isolate specific spectral lines and provide high spectral resolution. These filters allow for a more detailed analysis of the tissue structure and can provide additional information, such as tissue composition and metabolic activity.

 

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