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Part Number |
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T>90%@780-1100nm+R>99%@600-755nm Longpass Dichroic Mirror(LPDM)
SO3061254
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This LPDM longpass dichroic mirror is designed to reflect red and deep-red visible light while providing high-efficiency transmission across the near-infrared (NIR) spectrum.
It is ideal for laser beam combining, multi-spectral imaging, and fluorescence microscopy applications that utilize red excitation sources, such as 633 nm, 635 nm, or 647 nm lasers. By reflecting these wavelengths and allowing infrared signals in the 780–1100 nm range to pass, this mirror facilitates clean spectral separation for NIR-sensitive detectors and sensors.
Key specifications:
- Wavelength / main spec: Longpass transition optimized for NIR transmission and red reflection.
- Bandwidth / transition spec: Reflects 600–755 nm; Transmits 780–1100 nm.
- Transmission / blocking: T >90% at 780–1100 nm; R >99% at 600–755 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.