High-Quality Optical Fluorescence Filters from Reliable Suppliers and Factory in China

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 state-of-the-art production environment and advanced manufacturing and testing equipment enable us to deliver superior products.

In response to the 2019 COVID pandemic, our company has significantly invested in research and development, resulting in the creation of core optical components for PCR quantitative detection equipment specifically designed for detecting the new coronavirus. This innovative series of filters features high transmittance and a high noise background (above OD6), with exceptional isolation between excitation and emission filters. These characteristics make our products ideal for extracting and analyzing various detection reagent markers, thereby significantly improving detection signal accuracy.

Over the years, we have successfully partnered with numerous industrial-level companies and factories both in China and globally. Our clients span a wide range of sectors, including universities, government agencies, public institutions, large state-owned enterprises, and Fortune 500 companies. Many have praised our products for their quality and effectiveness, highlighting our commitment as reliable suppliers. We are dedicated to providing our customers with the highest quality, most efficient, and cost-effective optical filter solutions tailored to their needs.

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 coating process is used for these fluorescence filters?

These fluorescence filters are manufactured using IAD (Ion-Assisted Deposition) Hard Coating technology, which ensures superior durability, environmental stability, and consistent optical performance compared to standard soft-coated filters.

Q What does the "Cross" value (OD>6) mean in the specifications?

The "Cross" value refers to the cross-talk blocking performance between the excitation and emission channels. An OD>6 value means the optical density exceeds 6, indicating that less than 0.0001% of unwanted light is transmitted, ensuring extremely high signal purity in fluorescence imaging applications.

Q What is the blocking range and performance of these filters?

The filters offer broadband blocking with OD>6 across 200–900nm or 200–1200nm depending on the selected specification. This ensures effective suppression of background noise and unwanted light across the entire UV-Vis-NIR spectrum.

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 separating closely spaced excitation and emission wavelengths in fluorescence applications.

Q What standard sizes are available for these fluorescence filters?

These filters are available in multiple standard diameter sizes including Φ4mm, Φ12mm, Φ12.7mm, and Φ25.4mm. Custom sizes may also be available upon request to fit specific optical system requirements.

Q Which fluorescence applications are these filters compatible with?

These filters cover multiple excitation/emission wavelength pairs (such as 470/525nm, 523/564nm, 543/584nm, 571/612nm, and 628/692nm), making them compatible with a wide range of fluorescence applications including microscopy, flow cytometry, life science imaging, and multi-channel fluorescence detection systems.