HM-735 Hot Mirror & UV-IR Cut Filter
HM-735 passes VIS dead-flat at ~92–95 % T (400–730 nm), then knife-edges at 735–750 nm to ≤0.01 % T (OD4+) in the NIR—bright, colour-neutral white minus IR haze/heat. A tiny ~1.15 µm feature sheds lamp heat without affecting most Si/InGaAs bands.
- VIS window: ~92–95 % T, 400–730 nm (ultra-flat)
- IR edge: 735–750 nm knife-edge; <15 nm (10→90 % transition)
- IR rejection: >OD4 (≤0.01 % T) ~780–1050 nm; minor ~1.15 µm residual
- Durability: Low-scatter hard dielectric; abrasion & humidity resistant
- Substrates: Borofloat®, Eagle XG, D263 T (0.21–3.8 mm); soda-lime ≤150 °C
- Format & options: 5–450 mm; rear-AR & slight wedge to suppress ghosts
Learn more
Ripple-free VIS, razor IR cut: HM-735 preserves luminance/white balance while dumping NIR that drives haze, bloom and heat. Compact, durable stack for cameras, projectors, AR/HUD, photolithography/UV curing, and biomedical lighting. Need prototypes or volume? We coat, dice, and ship to spec—fast.
Description
HM-735 is a visible-pass, IR-blocking hot-mirror that runs dead-flat across the eye-sensitive 400–730 nm band at ~92–95% T, then dives with a knife-edge roll-off near 735–750 nm to 0.1% T through the near-IR. The result is brilliant, colour-neutral transmission of white light while dumping the IR that causes haze, flare, and thermal drift. A minor residual peak around ~1.15 μm keeps lamp heat manageable without disturbing most Si or InGaAs detectors.
Key advantages
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Ultra-flat VIS window — 92–95% T from 400–730 nm preserves true colour and maximum luminance.
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Sharp 735 nm edge — <~15 nm 10-to-90% transition cleanly separates visible and IR paths.
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Deep IR rejection — ≤0.1% T from ~780–1050 nm minimises sensor bloom and keeps optics cool.
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Low-scatter, dielectric durability — rugged stack resists abrasion and humidity for field, stage, and lab gear.
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Flexible glass choices — Borofloat®, Eagle XG, or D263 T (0.21–3.8 mm) for high-temp duty to ~450 °C; soda-lime for ≤150 °C. Custom sizes 5–450 mm; rear-surface AR and slight wedge available to suppress ghosts.
Typical applications
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Digital & film cameras — eliminate IR pollution while keeping white balance neutral.
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Laser & UHP projectors — reflect stray 808–1064 nm away from phosphor wheels and LCD engines.
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AR/HUD combiners — pass bright imagery, reject heat in compact, high-luminance waveguides.
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Photolithography & UV curing — pass process light while shielding stages and optics from IR load.
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Biomedical illumination — deliver cool, shadow-free white light to microscopes, endoscopes, and head-lamps.
Need test chips tomorrow or thousands next quarter? HM-735 hot-mirror filters are coated and cut-to-size (including dicing) to your exact spec—fast.
