Yes, custom edge filters with extremely steep transitions are available from Syron Optics.
Syron Optics manufactures edge filters—which they categorize specifically as Longpass (Cut-On) and Shortpass (Cut-Off) filters—using advanced thin-film optical coatings. By stacking dozens or hundreds of alternating microscopic layers of high-index and low-index materials, they are able to precisely sculpt the transmission curve. This interference-based design results in extremely steep edge transitions that sharply separate the highly transmitting passband from the blocking stopband, often achieving strong out-of-band rejection (such as OD4 or OD5 blocking).
Regarding customization, Syron Optics offers:
- Custom Sizing: They can custom cut optical filters to specific dimensions ranging from 3 x 3 mm (or 5 mm diameter) up to 60 x 60 mm.
- Custom Transmission Profiles: Because their filters rely on layered thin-film engineering rather than standard absorptive glass, the cut-on or cut-off edge placement and the steepness of the transition can be customized to exact specifications.
If you need a custom-sized edge filter or a highly specific transition slope, you can contact Syron Optics team directly for a quotation. While their standard stocked filters generally ship within 5 business days, Syron Optics note that custom-made products typically have a lead time of 4 to 8 weeks.
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