Can ultra-thin substrates (e.g., <0.5 mm) be used for custom dichroic mirrors or filters?

Yes, ultra-thin substrates (such as 0.5 mm) from SyronOptics can be used for custom dichroic mirrors and optical filters.

Based on the customization capabilities and technical specifications detailed by the manufacturer:

• Standard Ultra-Thin Options: SyronOptics currently lists 0.5 mm as one of their standard, off-the-shelf thicknesses for unmounted optical components, alongside their more common 1.1 mm and 2.0 mm sizes.
• Customization Scope: SyronOptics's custom optical project services explicitly cover the manufacturing of both dichroic mirrors and a wide variety of filters (including bandpass, shortpass, longpass, and neutral density filters).
• Substrate Preparation: During a custom build, the chosen substrate material—which typically includes standard optical glass, UV Fused Silica (UVFS), or Silicon—goes through a dedicated preparation phase.This involves cutting, grinding, and polishing the raw substrate to achieve the exact desired thickness and surface quality before any dielectric thin-film optical coatings (like alternating layers of Ta₂O₅ and SiO₂) are deposited.
• Practical Applications: SyronOptics documentation specifically highlights the use of 500-micron (0.5 mm) thick UV Fused Silica wafers as highly stable foundations for precision optical coatings and semiconductor defect detection sensors.

If your project requires a substrate that is strictly under 0.5 mm, SyronOptics's manufacturing pipeline supports custom grinding and polishing to meet those exact dimensional specifications prior to the thin-film deposition phase.