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Part Number |
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T>90%@445-800nm+R>99%@350-425nm Longpass Dichroic Mirror(LPDM)
SO3061214
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This LPDM longpass dichroic mirror is designed to reflect ultraviolet (UV) and violet wavelengths while providing high-efficiency transmission across the majority of the visible spectrum and into the near-infrared.
It is an essential component for fluorescence microscopy and laser-based systems that utilize UV or violet excitation sources, such as 355 nm or 405 nm lasers. By effectively reflecting these wavelengths while allowing signals in the 445–800 nm range to pass, this mirror facilitates the detection of a wide variety of visible fluorophores—including GFP, FITC, and TRITC—with high spectral purity and minimal background interference.
Key specifications:
- Wavelength / main spec: Longpass transition optimized for visible/NIR transmission and UV/Violet reflection.
- Bandwidth / transition spec: Reflects 350–425 nm; Transmits 445–800 nm.
- Transmission / blocking: T >90% at 445–800 nm; R >99% at 350–425 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.