IR Pass Filter
IR Pass Filters are precision optical filters designed to transmit infrared wavelength ranges while blocking unwanted visible wavelengths. Using advanced optical coating technology, IR pass filters provide high transmission within the target infrared band and effective visible light rejection outside the transmission range. Chenyu Optics manufactures IR pass filters in optical glass and fused silica with custom cut-on wavelengths, substrate materials and coating options.
IR Pass Filter Overview
IR Pass Filters are precision optical filters designed to transmit infrared wavelength ranges while blocking unwanted visible wavelengths outside the target spectral band.
Using advanced optical coating technology, IR pass filters provide high transmission within the infrared range and effective visible light rejection. They are widely used in infrared imaging, machine vision, remote sensing, optical inspection and thermal measurement systems.
Chenyu Optics supports custom IR pass filter manufacturing according to customer drawings, including custom substrate materials, dimensions, cut-on wavelengths, thicknesses and coating designs for prototype and repeat production.
Key Advantages of IR Pass Filter
Infrared Imaging & Remote Sensing Systems
IR pass filters are widely used for visible light rejection and infrared wavelength isolation in infrared imaging systems, remote sensing equipment, machine vision and thermal measurement instruments.
Typical Specifications of IR Pass Filter
| Material Options | Optical Glass, BK7, Fused Silica |
|---|---|
| Coating Type | Dielectric / absorptive IR pass coating |
| Optical Function | Infrared transmission / visible light blocking |
| Cut-on Wavelength | Customizable |
| Transmission Band | Customizable (NIR / SWIR) |
| Transmission | High transmission within infrared passband |
| Blocking | High blocking of visible wavelengths |
| Surface Quality | High precision optical finish |
Spectral Transmission Curve (Typical)
Why Choose Chenyu Optics for IR Pass Filter
Chenyu Optics focuses on drawing-based precision filter manufacturing for infrared imaging, remote sensing, machine vision and industrial optical systems. We support prototype verification, small-batch production and repeat manufacturing for non-standard IR pass filters.
Manufacturing Capability for IR Pass Filter
Precision Polishing
High surface quality processing for stable filter performance.
Dielectric Coating
High performance IR pass coating for precise cut-on wavelength and visible light blocking control.
Inspection & Packaging
Strict quality control on cut-on wavelength, transmission and blocking, with clean protective packaging before shipment.
Custom IR Pass Filter Options
Cutoff Filter Type Comparison
| Filter Type | Cutoff Behavior | Peak Transmission | Blocking (OD) | Typical Applications |
|---|---|---|---|---|
| IR Pass Filter | Transmits IR, blocks visible | >90% | OD3 – OD5 | Infrared imaging, remote sensing |
| UV Pass Filter | Transmits UV, blocks visible/IR | >85% | OD3 – OD5 | UV imaging, fluorescence excitation |
| Longpass Filter | Transmits long, blocks short | >90% | OD4 – OD6+ | Fluorescence, spectroscopy |
| Bandpass Filter | Transmits selected band only | >90% | OD4 – OD6+ | Machine vision, instrumentation |
Applications of IR Pass Filter
Infrared Imaging Systems
Visible light rejection for infrared camera and imaging optics.
Machine Vision Systems
Infrared wavelength filtering for machine vision and inspection equipment.
Remote Sensing Equipment
Infrared band isolation for remote sensing and detection systems.
Optical Inspection Systems
Spectral filtering for infrared-based inspection instruments.
Thermal Measurement Instruments
Infrared transmission control for thermal detection and measurement.
Security & Surveillance Cameras
Visible light blocking for night vision and IR surveillance systems.
IR Pass Filter FAQ
What is an IR pass filter used for?
An IR pass filter transmits infrared wavelengths while blocking unwanted visible light outside the target passband.
What parameters define an IR pass filter?
Key parameters include cut-on wavelength, transmission band, peak transmission, blocking level, and incident angle.
How is an IR pass filter different from a longpass filter?
An IR pass filter is a longpass filter specifically designed with a cut-on wavelength in the infrared region to block visible light.
Can IR pass filters be customized for different cut-on wavelengths?
Yes. Filters can be customized for near-infrared and short-wave infrared cut-on wavelengths.
Does incident angle affect IR pass filter performance?
Yes. The cut-on wavelength can shift with incident angle, so coating design should match the optical setup.
What information should I provide for a quotation?
Please provide cut-on wavelength, transmission band, substrate material, dimensions, angle of incidence, quantity and drawing if available.
Where can I learn more about IR pass filter design?
Additional information on IR pass filter design can be found from Edmund Optics.
Related Products for IR Pass Filter
Need Custom IR Pass Filters?
Send us your cut-on wavelength, transmission band, substrate, dimensions, coating requirements and quantity. Chenyu Optics will review the optical and mechanical specifications and provide a suitable IR pass filter manufacturing suggestion.