BMS-005 Beam Splitter
BMS-005 is a UV-blocking, colour-neutral VIS beamsplitter (≈T50/R50). It turns on steeply in the blue, then settles to ~49–53 % T from ~450–750 nm with a small 430–470 nm ripple; transmission returns to ~50–52 % by ~800 nm—yielding two true-colour paths with minimal re-balancing.
- Passband: ~450 – 750 nm (VIS), ~49–53 % T; ~50–52 % by ~800 nm
- VIS split ratio: ~49–53 % T / ~47–51 % R (≈50/50)
- UV behaviour: Strong suppression < ~360–380 nm; steep blue-edge turn-on
- Spectral flatness: Low mid-band ripple; shaped 430–470 nm blue-edge control
- Construction: Hard dielectric stack on Borofloat®, Eagle XG, D263 T, or soda-lime (to ~450 °C; ≤150 °C for soda-lime)
- Custom sizes: 5 – 450 mm • 0.21 – 3.8 mm; rear-surface AR & slight wedge options
Learn more
The neutral 50/50 split of BMS-005 keeps exposure and colour matched between channels. Strong UV suppression reduces stray fluorescence and sensor haze, while the shaped blue-edge preserves blue energy without letting UV through. Low ripple across the visible simplifies radiometric calibration and machine-vision thresholds.
Typical applications • Machine-vision taps (constant-ratio sampling without UV-induced noise) • Optical viewfinders, director’s feeds & dual-sensor capture • Microscopy/biomedical epi-illumination pick-offs • Projector/light-engine power/colour feedback while protecting optics from UV • Interferometers & beam diagnostics needing balanced splits.
Typical spectral behaviour (T-path) — ~450–750 nm: ~49–53 % T (near-flat) • 430–470 nm: small blue-edge ripple • ~800 nm: ~50–52 % T • < ~360–380 nm: strong UV suppression.
Need test chips tomorrow or thousands next quarter? BMS-005 beamsplitters are coated, diced, and shipped to your exact spec—fast.
Description
BMS-005 is a UV-blocking, colour-neutral VIS beamsplitter (≈ T50/R50). It turns on steeply in the blue, then settles to a near-flat ~49–53 % transmission from ~450–750 nm, with a small blue-edge ripple around 430–470 nm. Transmission returns to ~50–52 % by ~800 nm, giving you two true-colour paths with minimal re-balancing.
Key advantages
- Neutral 50/50 split – ~T49–53 / R47–51 across the visible keeps exposure and colour matched between channels.
- Strong UV suppression – rapid cutoff below ~360–380 nm reduces stray fluorescence and sensor haze.
- Low mid-band ripple – smooth spectrum simplifies radiometric calibration and machine-vision thresholds.
- Blue-edge control – shaped rise at the short-wavelength end preserves blue energy while trimming UV.
- Rugged dielectric stack – abrasion and humidity resistant for stage, field, and lab use.
- Made to fit – Borofloat®, Eagle XG, or D263 T (0.21–3.8 mm) for high-temp duty to ~450 °C; soda-lime for ≤150 °C. Custom-cut 5–450 mm with optional rear-surface AR and slight wedge to suppress ghosts.
Typical applications
- Machine-vision taps – constant-ratio sampling without UV-induced noise.
- Cameras & cinema – optical viewfinders, director’s feeds, dual-sensor capture.
- Microscopy & biomedical – epi-illumination pick-offs with neutral colour in both paths.
- Projectors & light engines – stable power/colour feedback while protecting optics from UV.
- Metrology & alignment – balanced splits for interferometers and beam diagnostics.
Need test chips tomorrow or thousands next quarter? BMS-005 beamsplitters are coated, diced, and shipped to your exact spec—fast.
