Tailor-Made High-Precision Optical Filter Longpass: The Premier Choice for Laser Medical Equipment, with Customizable Shortpass Options

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

Product Description

Product Description

Longpass Filter
An optical filter that transmits light with wavelengths longer than a specific cutoff wavelength while blocking shorter wavelengths.
Shortpass Filter
An optical filter that transmits light with wavelengths shorter than a cutoff wavelength while blocking longer wavelengths.

Specification

Product Name	Optical Filter Longpass / Shortpass
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

    1. Precise of Spectral Selectivity
Wavelength Filtering Capability
· Achieves transmission/blocking of specific wavelength bands through coating technology, with an accuracy of ±1 nm (e.g., narrowband bandpass filters).

Typical Case
· 808 nm semiconductor laser filter precisely transmits the laser wavelength while blocking >90% of stray light.

2. High Compatibility of Materials and Processes
Diverse Substrate Materials
· Optical glass (e.g., B270, BK7): Low cost, suitable for visible light bands.

· Fused quartz: High UV transmittance, excellent temperature resistance (-50°C~300°C).

· Sapphire/silicon wafers: High infrared transmittance, scratch-resistant (hardness 9H).

Advanced Coating Technologies
· Ion Beam Sputtering (IBS): High film density, laser damage threshold >10 J/cm².

· Electron Beam Evaporation (EBE): High mass-production efficiency, suitable for broadband filters.

3. Strong Environmental Adaptability
Weather Resistance
· Moisture and heat resistance: Transmittance attenuation <1% after 85°C/85% RH testing.

· Laser damage resistance: High-power laser filters (e.g., 1064 nm) can withstand continuous power >5 W/mm².

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.