High-Quality Optical Fluorescence Filters from China Suppliers | Leading Manufacturing Factory

Beijing Bodian Optical Tech. Co., Ltd. is a leading high-tech enterprise located in the Beijing Economic Development Zone, specializing in the research and production of precision optical filters. Our advanced production environment is complemented by state-of-the-art testing equipment, making us one of the top suppliers of optical components in China.

In response to the COVID-19 pandemic, we dedicated significant resources to research and development, successfully creating core optical components for PCR quantitative detection equipment to identify the novel coronavirus. Our optical filters boast high transmittance and a reduced noise background above OD6, with excellent isolation between excitation and emission filters. These features make our products ideal for the extraction and analysis of various detection reagent markers, significantly enhancing the accuracy of detection signals.

Over the past few years, we have established successful partnerships with numerous industrial-level companies and factories globally. Our clients, ranging from universities and government agencies to Fortune 500 companies and renowned manufacturers, have consistently praised our products for their quality and performance. As a reliable factory in China, we remain committed to providing our customers with the highest quality, most efficient, and cost-effective optical solutions.

Product Details

Specifications

Process	IAD Hard Coating
Wavelength	Ex（nm）	Em(nm)	Cross
	470-30	525-20	>6
	523-20	564-20	>6
	543-20	584-20	>6
	571-20	612-20	>6
	628-35	692-45	>6
Blocking	OD>6 @ 200～900nm or @ 200～1200nm
Slope(nm)	50% ~ OD5 <10nm
Cross	OD>6
Size(mm)	Φ4mm, Φ12mm, Φ12.7mm, Φ25.4mm etc

Frequently Asked Questions

Q What does IAD Hard Coating mean in the manufacturing process?

IAD stands for Ion-Assisted Deposition. This hard coating process uses ion beams to enhance the adhesion, density, and durability of the optical thin films, resulting in filters with superior environmental stability and longer operational lifespan compared to conventional evaporation methods.

Q What does OD>6 blocking mean for these filters?

OD>6 means the filter achieves an Optical Density greater than 6, which corresponds to blocking more than 99.9999% of unwanted light in the specified wavelength range (200–900nm or 200–1200nm). This ensures extremely high signal-to-noise ratio in fluorescence imaging and detection applications.

Q What are the available filter sizes and can custom sizes be ordered?

Standard sizes include Φ4mm, Φ12mm, Φ12.7mm, and Φ25.4mm. These cover most common microscope and instrument configurations. Custom sizes are typically available upon request — please contact the supplier directly to discuss specific dimensional requirements for your application.

Q What does the slope specification "50% ~ OD5 <10nm" indicate?

The slope specification describes how sharply the filter transitions from its transmission band to its blocking band. A slope of less than 10nm from 50% transmission to OD5 blocking indicates a very steep edge, which is critical for minimizing spectral crosstalk and maximizing the separation between excitation and emission channels.

Q Which fluorescence applications are these filter sets suitable for?

These filter sets are designed for a wide range of fluorescence applications including fluorescence microscopy, flow cytometry, confocal imaging, and multi-color fluorescence detection. The available excitation/emission pairs cover common fluorophores such as FITC, TRITC, mCherry, and Cy5, making them versatile for life science and biomedical research.

Q What is the difference between blocking range 200–900nm and 200–1200nm options?

The 200–900nm blocking range covers UV to near-infrared wavelengths and is suitable for standard fluorescence instruments. The extended 200–1200nm range additionally covers the near-infrared region, making it ideal for applications involving NIR fluorophores, NIR laser sources, or instruments with NIR-sensitive detectors where suppression of longer-wavelength background light is required.