Advanced Interference Coating Narrow Filters Engineered for Sub-Nanometer Spectral Linearity

• Customization: Available
• Warranty: 1 Year
• Usage: Optical
• Model NO.: FSOF
• Thickness Range: 1mm-2mm
• Color: Colourful
• Type: Color Filter
• Principle: Cut-off Filter
• Material: Glass
• Shape: Round
• Certification: RoHS, ISO, CE
• Customized: Customized
• Central Wavelength: 245 - 1064 Nm
• Half Bandwidth: 5 Nm 10nm; 20nm; 30nm; 50nm or Custom
• Cut-off Range: 200 - 1200nm
• 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 the field of optics, narrow filters serve as crucial components, functioning like precision sentinels that play an indispensable role in a wide range of optical systems. These filters are designed to isolate a very narrow band of monochromatic light from a complex spectrum, with their defining feature being an exceptionally narrow bandwidth. This enables them to precisely transmit light within a specific wavelength range while effectively blocking light outside that range.

The operation of narrow filters is based on the principle of optical interference. By alternately depositing thin films of materials with different refractive indices onto an optical substrate, incoming light undergoes multiple reflections and refractions at the interfaces between layers. Due to differences in interference effects across wavelengths, certain wavelengths are enhanced through constructive interference, while others are suppressed through destructive interference. By carefully engineering the thickness and number of these layers, the filter can be tuned so that only a specific narrow band of wavelengths constructively interferes and passes through, while other wavelengths are either reflected or absorbed—thus achieving highly selective spectral filtering.

Specification

Product Name	Narrow Filter
Transmittance	T>90%
Thickness	1.1 ±0.1mm or Custom
Dimension Tolerance	Custom
AOI	0°
Surface Quality (SQ)	60-40 Scratch & Dig
Clear Aperture (CA)	90%
Blocking	350-2000nm Except for Transmission Band

Optical Applications‌

Narrow filters find extensive applications across numerous disciplines. In astronomy, they allow scientists to observe spectral emissions from specific elements. For instance, by using such filters, astronomers can clearly capture characteristic spectral lines emitted by elements like hydrogen or oxygen in particular regions of space, enabling in-depth studies of stellar composition, evolution, and the distribution of interstellar matter. In biomedical research, narrow filters are commonly employed in fluorescence microscopy. Fluorescent labeling is a key technique in life sciences, where different fluorophores emit light at distinct wavelengths. These filters precisely isolate the desired fluorescent signals, significantly enhancing image contrast and resolution, thereby enabling researchers to observe cellular structures and molecular dynamics with greater clarity.

Key performance parameters define the quality and effectiveness of narrow filters. The center wavelength marks the midpoint of the transmission band and determines the specific wavelength the filter is designed to pass. Bandwidth refers to the width of the transmitted spectral range—narrower bandwidths indicate higher selectivity, allowing for more precise wavelength discrimination. Peak transmittance is another critical metric, representing the maximum percentage of light transmitted at the center wavelength. A higher peak transmittance indicates superior optical performance at the target wavelength.

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.