High - Quality Optical Filter Long - Wave Pass Filter Bandpass Filter for Optical Systems in - Stock Narrow Bandpass Filter Products

• Customization: Available
• Warranty: 1 Year
• Usage: Optical
• 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

Product Description

Product Description

A band-pass filter is a precision optical component designed to selectively transmit light within a specific wavelength range, widely used in optical detection, spectral analysis, laser systems, biomedical imaging (e.g., fluorescence microscopy), astronomical observation, and other fields. It is typically fabricated by depositing multiple dielectric films on a substrate (such as optical glass or quartz), leveraging the principle of light interference to achieve high transmittance in the target band and high blocking in other bands. Its performance is determined by the central wavelength, bandwidth (Full Width at Half Maximum, FWHM), and peak transmittance: the central wavelength defines the center of the passband, the bandwidth determines the width of the allowed wavelength range, and the peak transmittance reflects the efficiency of light transmission. Depending on application requirements, band-pass filters can be designed as narrow-band (bandwidth <10nm) or broad-band (bandwidth >50nm), with customizable parameters such as size and blocking depth to fit different devices.

Specification

Product Name	Band-pass 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

Allows light within a specific wavelength range to pass through while blocking or attenuating light outside this range.

1. Fluorescence Imaging: Isolating emission light from specific fluorescent dyes

2. Spectrometers: Selecting target wavelength signals for analysis

3. Laser Systems: Extracting or isolating specific laser wavelengths

4. Environmental Monitoring: Detecting absorption spectra of target gases

5. Machine Vision: Enhancing image contrast for specific colors

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.