IR Cut Filter
IR Cut Filters are precision optical filters designed to transmit visible light while blocking infrared wavelengths. They use dielectric filter coatings to achieve sharp spectral separation between the visible transmission band and infrared rejection band. Chenyu Optics manufactures IR cut filters in BK7, borosilicate glass and fused silica with custom cut-off wavelength design.
IR Cut Filter Overview
IR Cut Filters are precision optical filters designed to transmit visible light while blocking infrared wavelengths. They use dielectric filter coatings to achieve sharp spectral separation between the visible transmission band and infrared rejection band.
By reducing unwanted infrared radiation, IR cut filters improve color accuracy and imaging performance. They are widely used in machine vision cameras, imaging systems, digital cameras, optical sensors and display applications.
Chenyu Optics supports custom IR cut filter manufacturing according to customer drawings, including custom substrate material, dimensions, cut-off wavelength and coating design for prototype and repeat production.
Key Advantages of IR Cut Filter
Machine Vision & Imaging Systems
IR cut filters are widely used for improved color accuracy in machine vision camera systems, imaging systems, digital cameras and optical sensors.
Typical Specifications of IR Cut Filter
| Material Options | BK7, Borosilicate Glass, Fused Silica |
|---|---|
| Coating Type | IR cutoff dielectric coating |
| Optical Function | Visible transmission / IR blocking |
| Cut-off Wavelength | Customizable |
| Transmission Band | Visible wavelength range |
| Blocking Band | Infrared wavelength range |
| Surface Quality | High precision optical finish |
| Optical Distortion | Low |
Spectral Transmission Curve (Typical)
Why Choose Chenyu Optics for IR Cut Filter
Chenyu Optics focuses on drawing-based precision filter manufacturing for machine vision, imaging, camera and display optical systems. We support prototype verification, small-batch production and repeat manufacturing for non-standard IR cut filters.
Manufacturing Capability for IR Cut Filter
Precision Polishing
High surface quality processing for stable filter performance.
Dielectric Coating
High performance IR cutoff coating for sharp visible/IR spectral separation.
Inspection & Packaging
Strict quality control on cut-off wavelength and blocking performance, with clean protective packaging before shipment.
Custom IR Cut Filter Options
Bandpass Filter Type Comparison
| Filter Type | Typical FWHM | Peak Transmission | Blocking (OD) | Typical Applications |
|---|---|---|---|---|
| IR Cut Filter | N/A — shortpass edge (visible pass / IR block) | >90% in visible band | High blocking in IR band | Machine vision, digital cameras, imaging |
| Narrow Bandpass Filter | 1 – 10 nm | >90% | OD4 – OD6+ | Laser line selection, fluorescence |
| Standard Bandpass Filter | 10 – 50 nm | >90% | OD4 – OD6+ | Machine vision, instrumentation |
| Wide Bandpass Filter | 50 – 200 nm | >90% | OD4 – OD6 | Imaging, spectroscopy |
Applications of IR Cut Filter
Machine Vision Camera Systems
Improved color accuracy for machine vision imaging.
Imaging Systems
IR blocking for accurate color reproduction in imaging instruments.
Digital Cameras
Sharp spectral separation for digital camera sensor performance.
Optical Sensors
Reduced IR interference for optical sensor accuracy.
Display Systems
Visible light transmission control for display applications.
Industrial Inspection Equipment
Accurate color imaging for industrial inspection systems.
IR Cut Filter FAQ
What is the purpose of an IR cut filter?
An IR cut filter blocks infrared wavelengths while allowing visible light to pass, improving image quality and color accuracy.
Why are IR cut filters used in machine vision cameras?
They reduce infrared interference that can affect sensor response and image color reproduction.
Can IR cut filters be customized?
Yes. Cutoff wavelength, substrate material, dimensions, and coating performance can be customized.
What factors affect IR cut filter performance?
Performance depends on cutoff wavelength, transmission requirements, blocking range, coating design, and incident angle.
What information should I provide for a quotation?
Please provide cut-off wavelength, substrate material, dimensions, angle of incidence, quantity and drawing if available.
Where can I learn more about IR cut filter design?
Additional information on IR cut filter design can be found from Edmund Optics.
Related Products for IR Cut Filter
Need Custom IR Cut Filters?
Send us your cut-off wavelength, substrate, dimensions, coating requirements and quantity. Chenyu Optics will review the optical and mechanical specifications and provide a suitable IR cut filter manufacturing suggestion.