Inline Filter Holders for Measuring Absorbance and Transmission
Inline filter holders from Ocean Optics are sturdy, convenient accessories for measuring the absorbance and transmission of optical filters and solid samples. Several options are available depending on your application needs.
The FHS-UV inline filter holder is an affordable accessory for quick absorbance or transmission measurement of optical filters. It includes 74-UV 5-mm f/2 collimating lenses for maximum light throughput and a manual light-block wheel for dark readings. This holder is a simple, effective tool for measuring and accommodating filters in optical setups.
The INLINE-SFH is a compact inline filter holder that connects to optical fibers on either side, allowing users to measure optical filters directly in the light path. It accommodates filters 10–12.7 mm in diameter and up to 9 mm thick, making it ideal for absorbance and transmission measurements in fiber-coupled spectroscopy setups.

FHS-UV
Equipped with 74-UV f/2 collimating lenses and a manual light-block wheel, enables measurements of filters up to 25 mm diameter and 6 mm thick

INLINE-SFH
Integrates with SMA-connected fibers, supports filters 10–12.7 mm in diameter and up to 9 mm thick
| Feature / Part Number | FHS-UV | INLINE-SFH |
| Filter Type | Standard round filters | Round filters |
| Filter Size | Up to 25 mm diameter, 6 mm thick | 10–12.7 mm diameter, up to 9 mm thick |
| Collimating Lenses | 74-UV f/2 lenses for high throughput | Not included |
| Special Features | Manual light-block wheel for dark readings | Compact design for inline fiber setups |
| Fiber Connections | SMA connectors | SMA connectors |
| Applications | Quick absorbance/transmission measurements | Inline absorbance/transmission in tight setups |
| Use Case | Affordable and practical | Compact and fiber-ready |