Life Science Optics

Semrock Optical Filters

Make Every Photon Count in Your System

With proven results, we give you access to high-level engineering know-how that will help make every photon count in your system. As the pioneering experts in optical filters for life science, analytical instrumentation, and medical diagnostics applications, we have continually set the standards for advanced performance and reliability. Our unwavering commitment to quality and customer service allows us to consistently deliver much more than just filters.

When you are developing optical instrumentation, you continually face new challenges: new customer requirements and product expectations, evolving technologies, changing markets, and the need for a rapid and decisive response. To help you conquer those challenges, we provide superior products and expert, personalized support.

We specialize in the volume production of optical filters for the life science and analytical instrumentation markets, and also manufacture filters for laser and optical systems applications. Our products exclusively feature hard, thin-film sputtered coatings for proven reliability. These filters will not change or degrade in any way as a result of humidity or temperature variations, nor will they “burn out” with normal use. All of our products are backed by our industry-leading ten-year warranty.

Overall, Semrock filters are brighter, more durable, and spectrally more sophisticated than those made by other coating technologies, driving significant improvements for our customers and their applications: faster measurement times, reduced downtime, consistent performance, repeatable manufacturing, and lower optical component count.

We make our unique products with lot-to-lot consistency in high volumes, providing our OEM customers with a dependable supply. We find solutions “within the box” of our standard catalog, and “out of the box” with the help of our expert design staff, and we apply each strategy in the right proportion.

With thousands of in stock items available for shipment often the same day, combined with our ability to custom-size these items (typically in less than a week) and perform custom co-development engineering with fast prototyping, we can quickly provide intelligent solutions that meet your price points.

I have worked with several filter manufacturers for custom parts related to medical devices. Semrock has consistently delivered rapid turn-around for custom theoretical models, quotes, and part delivery. Further, the delivered part performance has provided a close match to the theoretical performance. Over 2 years, Semrock has worked with us through product development iterations while providing key filter related insights and sensitivities.” -Dr. S. Diol, Systems Engineering Team Leader at Ortho Clinical Diagnostics

For customers like Dr. S. Diol, we found a solution “within the box” of our standard catalog, and “out of the box” with the help of our expert design staff, and we applied each strategy in the right proportion.

20 Different Batches — Reproducible Results

Filter and Optical System Design Capabilities

Our design engineers are experts in optical science, physics, electrical and mechanical engineering, and biology, and are all experienced problem-solvers.

Industry’s Fastest Turnaround
We’ve implemented proprietary thin film design software to complete spectrally complex tasks in minutes. Now we can typically design and quote a prototype within a week, where previously it could take two to four weeks.

Modeling Toolbox
We use our own state-of-the-art software to simulate complex coating runs before they reach manufacturing to ensure high confidence in the engineering design

Custom Evaluation
By evaluating the entire optical system, we can design and optimize the right filters the first time. This inclusive approach minimizes system redesigns.


SearchLight is a dedicated website that allows fluorescence microscope users and optical instrument designers to evaluate the optimal spectral performance of fluorophores, filter sets, light sources, and detectors as components of an overall system. Will your existing filter set work with a new fluorophore or light source? What if a new exciter was installed or you changed cameras? With this tool, you can compare optical signal to noise while changing any and all components of your system. SearchLight allows you to upload your own spectra for any component and also save and share results securely.

Take me to Searchlight

Searchlight Ipad

Are the Filters in Your Microscope Reducing System Performance?

What if you were able to improve the performance of your microscope by simply replacing the optical filters? The frustration of low performing systems is a common one in an industry where every ounce of signal counts. Older filters can degrade with time causing less signal to get through. It’s also possible the original filters, even in a newer microscopes, were never the proper fit for your application needs. By replacing them with optimized Semrock filters you can increase overall performance without replacing the entire system.

Leading Competitor’s Quad-band
“Pinkel” Filter Set

Semrock BrightLine Quad-band
“Pinkel” Filter Set

Semrock Optical Filters

Custom Quote Request

Contact us today to start a conversation about custom optical filters
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