Custom OD4.0 Long-Pass Filter Optics

What is a long-pass filter?

A long-pass filter is a common optical filtering element.

Its main function is to block short-wave light and allow long-wave light to pass through.

The Chenyu long-pass filter has the advantages of wide cutoff bandwidth, deep cutoff depth, high conversion steepness and high transmittance.

Chneyu high-quality OD4.0 long-wave pass filter achieves high transmission within the passband, while providing excellent cutoff performance within the cutoff band.

Wavelength range:

The filter can cover ultraviolet, visible light to near-infrared (typical design range: 300 nm – 2000 nm).

Cut-on Wavelength

Common values include 400 nm, 550 nm, 850 nm, 1000 nm, etc. Customization is also possible based on specific applications.

 

The characteristics of long-pass filter

• The transmittance in the long-wave region is typically over 90%.

• Ensures clear spectral separation and enhances system efficiency.

• The blocking depth in the cutoff zone can ≥4.0.

• Some filters support a certain angle of incidence (such as 0 – 45°), and the cutoff wavelength can be finely adjusted.

• Multi-band system covering the range from ultraviolet to infrared. People can choose it in various applications.

 

Applications of long-pass filter:

 

• Fluorescence imaging

• Laser system

• Infrared detection

• Machine vision

• Research experiment

 

Chenyu employs the most advanced production technology and is capable of providing customized services. Please contact our team or view our other products.