Bandpass Optical Filter 520nm For Colorimetry

Bandpass optical filter 520nm allows light with a wavelength of around 520 nanometers (nm) to pass through the filter while blocking other wavelengths. This type of filter is commonly used in applications where precise control of the spectral content of light is required, such as in fluorescence microscopy, spectroscopy, and colorimetry.

 

Our filter consists of a transparent substrate, such as glass or quartz, coated with thin layers of materials that selectively reflect and transmit light at specific wavelengths. Our filter has high transmission efficiency, better spectral isolation, and higher contrast between the passband and rejection bands. What's more, they are durable and stable over time, withstanding the environmental conditions of the application. Welcome to contact us for your perfect optics solution!

 

Features

- Bandpass for 520nm

- Accurate wavelength

- Highly scratch-resistant

- High signal-to-noise ratio

- Deeply customized

- High transmittance

- ISO9001, ROHS certified

 

Parameters

Product Name	520nm bandpass filter
Central Wavelength (CWL)	520nm
FWHM	30nm 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

A 520nm bandpass filter is a valuable tool for controlling light's spectral content in various applications, from scientific research to industrial sensing and imaging. Here are some of the applications:

- Fluorescence microscopy

- Spectroscopy

- Colorimetry

- Environmental monitoring

- Machine vision

 

How does a 520nm bandpass filter apply in colorimetry?

In colorimetry, a bandpass optical filter of 520nm can be used to measure the intensity of the green light in a sample which is essential because the human eye is most sensitive to green light, and our perception of color is primarily based on the intensity of light at different wavelengths.

 

A colorimeter or spectrophotometer equipped with a bandpass filter is used to measure the intensity of green light. The filter is placed in front of the detector to block out all other wavelengths of light except for green light in the range of approximately 515-525nm.

 

The sample is then illuminated with a light source of known intensity, and the detector measures the power of the light that passes through the filter. By comparing the intensity of the filtered light to the intensity of the light source, the colorimeter can calculate the concentration or purity of the green color in the sample.

 

This technique is commonly used in color-matching applications, where it is vital to ensure consistency in the color of products such as paints, textiles, and plastics. It is also used in quality control applications to monitor the color of products during manufacturing processes.

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