Life Science Optics

Semrock Optical Filters

See More 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.

20 Different Batches — Reproducible Results

Exceptional Lead Times

exceptional lead times, order now

We heard your feedback and are pleased to announce some exciting changes at IDEX Health & Science that will ensure we provide exceptional lead times to get product in your hands faster. By adding new coaters, training additional staff, and replenishing inventory levels, we’ve increased our capacity by over 40% and can now offer the lead times you need.

Choose Semrock optical filters for your new instrument needs:

  • Catalog items available and in stock to ship same week
  • New coatings designed and delivered within 4-8 weeks

We thank you for your continued partnership and trust in our Semrock® brand and IDEX Health & Science.

Visit our webstore to explore our catalog products such as bandpass filters, long pass and short pass edge filters, notch filters, dichroic beamsplitters, and more. For Semrock individual optical filters, click here. For Semrock optical filter sets, click here.

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.

Optical Filter Resources and Tools

2023 Semrock Catalog

download 2023 semrock optical filters catalog

Our engineers and product management teams have collaborated to provide you with the Semrock Master Catalog from IDEX Health & Science. With proven results, we give you access to high-level engineering that will help make every photon count in your system.

Learn More


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

Customer Testimonial

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.

Semrock Optical Filters

Custom Quote Request

Contact us today to start a conversation about custom optical filters
Let's discuss your project