For optical filters from Syronoptics.com, the thickness varies significantly between unmounted and mounted versions to accommodate different mounting mechanisms and clear aperture requirements.
According to Syronoptics' technical specifications, the substrate and housing thicknesses are categorized as follows:
1. Unmounted Filters (Substrate Thickness)
Unmounted optics consist of the bare filter glass without an external housing. They are typically available in three standard substrate thicknesses:
- 0.5 mm
- 1.1 mm (Most common)
- 2.0 mm (Most common)
2.Mounted Filters (Housing Thickness)
When a filter is housed, the "thickness" usually refers to the external dimensions of the mount rather than the glass itself. The housing thickness is larger to ensure stability and compatibility with standard optical systems:
-
Standard Mounting (No Thread):
- 3.5 mm (Default thickness)
- 6.0 mm (Available upon request)
-
Threaded Mounts:
- 6.0 mm to 8.0 mm (Typical range for most metric and imperial threaded housings)
- 7.62 mm (Specific standard for SM05 and SM1 threaded mounts)
- 6.5 mm (Standard for many metric threaded mounts like M25.5 through M55)
Summary Comparison Table
| Filter Type | Typical Thickness | Notes |
| Unmounted | 0.5 mm, 1.1 mm, 2.0 mm | Refers to the actual glass substrate. |
| Standard Mounted | 3.5 mm or 6.0 mm | Includes the protective aluminum housing. |
| Threaded Mounted | 6.0 mm – 8.0 mm | Depends on the thread type (e.g., M-series or SM-series). |
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