Custom 200-3000nm Bandpass Optical Filters for Laser Spectroscopy UV

Product Description

Product Description

Our high-precision optical filters are advanced, specially coated optical components expertly engineered to selectively transmit specific target wavelengths of light while effectively blocking unwanted stray light, strong glare, and disruptive optical interference. By precisely controlling light transmission, they significantly enhance image contrast, improve signal accuracy and purity, and boost overall system stability and reliability. They are widely applied in laser systems, spectroscopy equipment, industrial cameras, medical devices, and various precision optical instruments. Featuring robust, long-lasting thin-film coatings and rigorous optical quality inspection throughout production, our optical filters maintain stable, consistent performance even in demanding industrial, medical, and scientific environments.

Working Principle

Long Pass Filter (LPF) – Introduction

Short Pass Filter (SPF) – Introduction

Optical filters use precision thin-film coating technology (multi-layer dielectric coatings) to control light transmission.
• Light enters the filter surface.
• Coating layers reflect or absorb unwanted wavelengths.
• Only target wavelengths pass through efficiently.
This creates clean, accurate light selection without distortion.

Long Pass Filters transmit longer wavelengths and block shorter wavelengths.
• Cutoff wavelength: Customizable (e.g., 550nm, 650nm, 850nm).
• High transmission above cutoff: >85%–95%.
• High blocking below cutoff: OD3–OD6.
• Typical uses: Fluorescence imaging, red/NIR enhancement, laser protection, light separation.

Short Pass Filters transmit shorter wavelengths and block longer wavelengths.
• Cutoff wavelength: Customizable (e.g., 600nm, 700nm, 900nm).
• High transmission below cutoff: >85%–95%.
• High blocking above cutoff: OD3–OD6.
• Typical uses: Visible imaging, UV/blue signal extraction, laser systems, anti-infrared interference.

Specification

Product Name	Optical 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

Filters also enhance treatment effectiveness. Take light therapy devices as an example—different wavelengths have distinct effects on the skin: red light improves circulation, while blue light combats acne-causing bacteria. Filters precisely eliminate unwanted light spectrums, allowing only specific, targeted wavelengths to pass through. This results in purer, more effective light delivery, enabling the device to address skin concerns with greater accuracy and deliver superior results.

Moreover, filters play a vital role in user safety. For devices that come into direct contact with the skin—such as facial steamers—filters remove harmful substances like bacteria and heavy metals from water, ensuring the emitted steam is clean and safe. This protects users from exposure to pollutants during treatment. For individuals with sensitive skin, a clean, contaminant-free environment is especially important, and filters serve an irreplaceable function in achieving this.

Beauty device filters come in various types, each designed for specific devices and applications. Paper filters are common in smaller, home-use devices like facial cleansers and ion hair brushes. They are cost-effective and efficient but require regular replacement to maintain performance—typically every one to two months. Activated carbon filters, known for their powerful adsorption capabilities, effectively eliminate odors and harmful gases. In heated devices such as steamers and hot sprayers, they absorb unpleasant smells generated during heating and filter out impurities in water. Metal filters, on the other hand, offer high durability and strength, making them ideal for heavy-duty professional equipment like laser and radiofrequency beauty devices. They withstand high temperatures and pressure, ensuring stable performance even under demanding conditions.

The Critical Role of Filters in Beauty Devices

In today's beauty-conscious era, beauty devices are springing up like mushrooms after rain—from compact home facial cleansing tools to large-scale professional laser systems in beauty salons. These innovations offer people more convenient and efficient beauty experiences. Yet within these devices lies a frequently overlooked but vital component: the filter.
The role of beauty device filters is crucial. First and foremost, they effectively trap impurities. During beauty treatments, whether using mist-based hydration devices or cleansing tools with suction functions, airborne dust, dead skin cells, and other contaminants can easily enter the device through airflow. The filter acts as a strong defensive barrier, blocking these particles from reaching sensitive internal components, thus preventing wear and damage and significantly extending the device's lifespan. For instance, in high-end facial cleansing devices, filters capture fine dust particles, ensuring the smooth operation of critical parts like air pumps and preventing reduced suction or malfunctions caused by accumulated debris.

Company Profile

FUSHI

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.