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Part Number |
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T>90%@515-800nm+R>99%@400-500nm Longpass Dichroic Mirror(LPDM)
SO3060651
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This LPDM longpass dichroic mirror is designed to reflect blue and violet visible light while providing high-efficiency transmission for green, yellow, orange, red, and near-infrared (NIR) wavelengths.
It is highly effective for fluorescence microscopy and laser beam combining applications that utilize blue excitation sources, such as 445 nm, 473 nm, or 488 nm lasers. By reflecting these shorter wavelengths and allowing signals in the 515–800 nm range to pass, this mirror ensures excellent spectral separation for common fluorophores like EGFP, EYFP, and FITC, while maintaining a high signal-to-noise ratio.
Key specifications:
- Wavelength / main spec: Longpass transition optimized for green-to-NIR transmission and blue/violet reflection.
- Bandwidth / transition spec: Reflects 400–500 nm; Transmits 515–800 nm.
- Transmission / blocking: T >90% at 515–800 nm; R >99% at 400–500 nm.
- Format / custom option: Available in mounted (dia 12.5–25 mm) and unmounted (25x36–35x52 mm) formats; custom sizes available on request.
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Product Faqs
What does a dichroic mirror do?
A dichroic mirror separates light by wavelength. It is designed to reflect one wavelength range while transmitting another wavelength range.
For example, a dichroic mirror may reflect a laser wavelength while transmitting a visible alignment beam, fluorescence signal, or another laser wavelength. The exact function depends on the reflection band, transmission band, and angle of incidence.
What angle of incidence should I use?
Most dichroic mirrors are designed for a specified angle of incidence, commonly 45°, unless otherwise stated.
Can this dichroic mirror be used to combine or separate laser beams?
Yes. Dichroic mirrors are commonly used for laser beam combining and beam separation when the wavelengths are different enough and the reflection/transmission bands match the system requirement.
For example, one wavelength may be reflected at 45°, while another wavelength passes through the mirror. Before ordering, please confirm the laser wavelengths, AOI, beam size, and required reflection/transmission performance.
Not sure if this product fits your setup?
Whether you are replacing an existing part or building a new system, send us:
- Original part number or target specification
- Required size and quantity
- Application or system goal
We will help check product fit or suggest a stock/custom alternative.