Case Study: CO₂ Blocking Notch Filter

Case Study: Notch Filter Development for Ventilators

Customer Challenge: We supplied a range of narrow band filters for gases such as CO2, CO to an existing customer for use in ventilators. They approached us in response to the COVID-19 pandemic requesting a specialised notch filter that blocks carbon dioxide (CO₂) in the 3800 to 4400 nm range while transmitting light in the carbon monoxide (CO) range of 4650 to 4900 nm. The urgency for this filter was critical, the manufacturer faced immense pressure, needing to increase production volumes tenfold.  For Vortex the first batch had to be produced within just three weeks.

Vortex’s Solution: We were able to do this through one of our 5 machines devoted solely to infrared filters, all of which are fully automated sputter deposition coating plants. Following an exchange of information with the customer, to optimise our proposed custom design, we were able to immediately begin development and production. Vortex’s ability to remain agile and flexible enabled us to quickly adapt to the 3-week lead-time request without impacting other customer deliveries. This has given us a great reputation throughout the optical coating industry for producing difficult filters on short lead times.

Outcome: Despite the unprecedented challenges posed by the pandemic, Vortex successfully delivered the first batch of notch filters within the three-week timeframe. They met all performance criteria exactly. Despite the urgency, quality remained paramount, particularly appropriate for medical devices.

This swift response not only helped the manufacturer meet the urgent needs of healthcare providers during the pandemic but also reinforced Vortex’s reputation as a dependable partner in critical medical applications.