Lot-to-lot Consistency with Semrock Optical Filters

Sep 19, 2025 by IDEX Health & Science

What's the real difference between a filter's advertised performance and what's actually delivered? The answer lies in lot-to-lot consistency. You might have seen advertised specifications with impressive spectral curves, but how do you know if the filter you receive will match those promises?

We recently tested a competitor’s optical filter’s advertised theoretical data against that same filter’s actual measured performance.

Can you spot the difference?

How about here?

The results were telling. When we measured the actual performance of the filter, it did not match the theoretical data advertised. This discrepancy isn't just a minor inconvenience; it has real-world consequences. Lack of lot-to-lot repeatability can lead to significant batch-to-batch issues, affecting everything from crosstalk to the overall signal you can achieve in your system. If a filter can't consistently deliver on its advertised specifications, it can compromise the integrity and reliability of your entire application.

At IDEX Health & Science, we believe that what you see should be what you get. Our commitment to lot-to-lot consistency is not just a promise; it's a fundamental part of our manufacturing process, backed by world-class metrology. We use our award-winning KolaDeep^™ Spectral Measurement System to ensure that every Semrock optical filter meets or exceeds its theoretical performance. This meticulous approach guarantees that our filters deliver exactly what we say they can do, every time.

40 Different Batches (>5 years)
Different Machines. Different Times. Same Performance.

 

FILTER SUPPLIER A Limitation in design and coating technology produce filters with poorer SNR		Lower instrument throughput
FILTER SUPPLIER B Limitation in production capacity or production site		Limits your sales growth Risk to supply continuity
FILTER SUPPLIER C Limitation in coating process control and metrology produce variable performance		Poor yields Field service or support after sale
Consistent and Best Instrument Performance		Highest transmission Deep OD Steep edges and the ability to prove it Lot to lot precision edge placement – high consistency High mix and high-volume sputter coating technologies

The Assurance of Performance

In an industry where precision is paramount, choosing a filter provider that guarantees lot-to-lot consistency is essential. The integrity of your scientific and medical instrumentation depends on repeatable, reliable performance. By eliminating the gap between theoretical data and real-world results, Semrock optical filters provide the confidence and assurance you need to achieve your most demanding goals.

To learn more about Semrock optical filters and our commitment to consistency, click here.