Durable Infrared Filters for Industrial Use Resistant to High Temperatures and Harsh Environments in Sensors, Lasers, and Inspection Equipment

• Customization: Available
• Warranty: 1 Year
• Usage: Optical
• Model NO.: FSOF
• Color: Colourful
• Type: Color Filter
• Principle: Cut-off Filter
• Material: Glass
• Angle of incidence: 45°
• Shape: Round
• Certification: RoHS, ISO, CE
• Customized: Customized
• Wavelength Range: 400-1300nm
• Spectral Range: 300-1650
• Dimensional Tolerance: 0.5 - 600 ± 0.02 mm
• Optical Density: Od3; Od4; Od5; Od6
• Transport Package: Foam Carton Inner, Then Cartons to Pack Them
• Specification: Customized
• Trademark: FS
• Origin: Tianjin
• Production Capacity: 2000 Pieces/Month
• Package Size: 20.00cm * 20.00cm * 20.00cm
• Package Gross Weight: 1.000kg

Product Description

Product Description

In today's rapidly advancing technological era, infrared filters—though often unseen—are playing a pivotal role across a wide range of fields. As essential optical components, these filters selectively transmit or block specific wavelengths of infrared light. Their core function lies in precisely controlling infrared radiation to meet the diverse demands of various applications.

In principle, infrared filters operate through physical mechanisms such as absorption, reflection, and interference. Absorptive filters contain specially formulated materials that capture targeted infrared wavelengths, converting them into heat and dissipating it—effectively removing unwanted radiation. Reflective filters, on the other hand, use advanced coating techniques to reflect specific infrared wavelengths at the surface while allowing others to pass through, thereby separating infrared light from the rest of the spectrum. Interference-based filters rely on the wave nature of light; through precisely engineered multilayer thin films, they cause targeted infrared wavelengths to cancel each other out via destructive interference, effectively filtering them from the transmitted light.

Specification

Product Name	Optical IR Filter
Diameter	4mm-160mm - 0.20mm
Thickness	0.5mm-4mm
Dimension Tolerance	4mm-160mm - 0.20mm
Surface Quality	60/40, 40/20 or better
Transmission	>95%
Clear Aperture	≥90%
Type	Longpass Filter

Optical Applications‌

One of the most prominent applications of infrared filters is in security and surveillance. During nighttime monitoring, ambient light is often too weak for standard cameras to produce clear images. Infrared filters solve this by blocking infrared light during the day, ensuring that captured images remain true to color and sharp in detail. At night, they switch to a mode that allows infrared light to pass through, working in tandem with infrared illuminators to enable cameras to capture crisp, clear images even in complete darkness. This seamless day-and-night functionality ensures surveillance systems remain effective around the clock, offering reliable protection for people and property.

In digital photography, infrared filters open up creative possibilities. Photographers use them to achieve striking visual effects. For instance, when shooting landscapes, an infrared filter can suppress certain visible wavelengths, enhancing the contrast between the deep blue of the sky and the vibrant green of foliage, resulting in dreamlike, surreal imagery. Infrared photography also enables the capture of unique subjects—such as nocturnal wildlife activity—expanding the boundaries of artistic expression and exploration.

In the medical field, infrared filters are proving indispensable. In infrared thermal imaging devices, they precisely eliminate unwanted infrared wavelengths, allowing only the desired bands to reach the sensor. This significantly enhances image clarity and diagnostic accuracy. By mapping subtle variations in surface body temperature, thermal cameras equipped with these filters help clinicians detect abnormalities such as inflammation or tumors. This non-invasive approach offers a powerful tool for early diagnosis and treatment, opening new pathways in preventive healthcare.

Company Profile

Tianjin Fushi Optics Co., Ltd.

Tianjin Fushi Optics Co., Ltd. is a comprehensive optoelectronic enterprise integrating R&D, production, sales, and after-sales service. Since its establishment in 2012, the company has been dedicated to technological innovation and industrial application in the field of optical components, with its manufacturing base located in China's core optical industry zone. The product portfolio covers a full range of optical basic components, including lenses, prisms, mirrors, optical windows, and filters, with particular technical expertise in the design and manufacturing of diffraction gratings.  

In 2017, Fushi Optics established a professional optical laboratory in Dongli District, Tianjin, committed to integrating optical theoretical research with engineering practice. After years of technical accumulation, the laboratory has gained wide academic recognition for its research achievements in spectral analysis, precision optical processing, and other fields, forming an integrated "industry-academia-research-application" technological innovation system. It continues to provide high-performance optical solutions for the optoelectronic industry.

FAQ

Q: How can I get samples from you?

Just send us your requirements, and we will send samples accordingly. 

 

Q: How long is your delivery time? · 

Regarding inventory, it is 3 working days;

For customized one, it's about 15-25 working days, depending on exact quantity and order date. 

 

Q: Can I customize the products based on my requirements?

Yes, we can customize the material, specifications and optical coating for your optical components as per your requirements.

Q: Are you a factory? 

Yes, we are a professional manufacturer of optical components. We have more than 20 years of experience in optical cold working.

 

Q: How do you control the quality?

More than four times of quality inspection during the production process; we can provide the Quality Test Report.

Packing & Delivery

We attach great importance to every detail in production and communication. Should you have any questions, suggestions, or comments, please do not hesitate to share them with us. Your feedback is invaluable in our pursuit to become a worthy, trusted, and reliable supplier. Thank you for your visit.